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CXA3026AQ
8-bit 140MSPS Flash A/D Converter
Description The CXA3026AQ is an 8-bit high-speed flash A/D converter capable of digitizing analog signals at the maximum rate of 140MSPS. ECL, PECL or TTL can be selected as the digital input level in accordance with the application. The TTL digital output level allows 1: 2 demultiplexed output. Features * Differential linearity error: 0.5LSB or less * Integral linearity error: 0.5LSB or less * High-speed operation with a maximum conversion rate of 140MSPS * Low input capacitance: 21 pF * Wide analog input bandwidth: 150 MHz * Low power consumption: 790 mW * Low error rate * Excellent temperature characteristics * 1: 2 demultiplexed output * 1/2 frequency divided clock output (with reset function) * Compatible with ECL, PECL and TTL digital input levels * Single +5 V power supply operation available * Surface mounting package
DGND3 AGND VRM3 AVCC VRM2
48 pin QFP (Plastic)
LEAD TREATMENT: PALLADIUM PLATING
Structure Bipolar silicon monolithic IC Applications * Magnetic recording (PRML) * Communications (QPSK, QAM) * LCDs * Digital oscilloscopes
AVCC
VRM1
12 11 10 CLK/E 13 CLKN/E 14 CLK/T 15 N.C. 16 N.C. 17 N.C. 18 DVCC2 19 DGND2 20 P2D0 21 P2D1 22 P2D2 23 P2D3 24
9
8
7
6
5
VRB
2
VRT
Pin Configuration (Top View)
4
3
DVEE3
1 48 RESETN/E 47 RESET/E 46 RESETN/T 45 SELECT 44 INV 43 CLKOUT 42 DVCC2 41 DGND2 40 P1D7 39 P1D6 38 P1D5 37 P1D4
25 26 27 28 29 30 31 32 33 34 35 36
DGND2
P1D1
AGND
VIN
P2D7
P2D5
DVCC1
P1D0
P2D4
P2D6
DGND1
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
--1--
DVCC2
P1D2
P1D3
E96304C92
CXA3026AQ
Absolute Maximum Ratings (Ta = 25 C) * Supply voltage Unit AVCC, DVCC1, DVCC2 -0.5 to +7.0 V DGND3 -0.5 to +7.0 V DVEE3 -7.0 to +0.5 V DGND3 - DVEE3 -0.5 to +7.0 V Analog input voltage VIN VRT - 2.7 to AVCC V Reference input voltage VRT 2.7 to AVCC V VRB VIN - 2.7 to AVCC V |VRT - VRB| 2.5 V Digital input voltage ECL (/E1) DVEE3 to +0.5 V PECL (/E) -0.5 to DGND3 V TTL (/T, INV) -0.5 to DVCC1 V other (SELECT) -0.5 to DVCC1 V VID2 (|/E - N/E|) 2.7 V Storage temperature Tstg -65 to +150 C Allowable power dissipation PD 2 W (when mounted on a glass fabric base epoxy board with 50mm x 50mm, 1.6mm thick)
* *
*
* *
Recommended Operating Conditions With a single power supply With dual power supplies Unit Min. Typ. Max. Min. Typ. Max. +4.75 +5.0 +5.25 +4.75 +5.0 +5.25 V Supply voltage DVCC1, DVCC2, AVCC DGND1, DGND2, AGND -0.05 0 +0.05 -0.05 0 +0.05 V DGND3 +4.75 +5.0 +5.25 -0.05 0 +0.05 V DVEE3 -0.05 0 +0.05 -5.5 -5.0 -4.75 V Analog input voltage VIN VRB VRT VRB VRT V Reference input voltage VRT +2.9 +4.1 +2.9 +4.1 V VRB +1.4 +2.6 +1.4 +2.6 V |VRT - VRB| 1.5 2.1 1.5 2.1 V Digital input voltage ECL (/E) : VIH DGND3 - 1.05 DGND3 - 0.5 V : VIL DGND3 - 3.2 DGND3 - 1.4 V PECL (/E) : VIH DGND3 - 1.05 DGND3 - 0.5 V : VIL DGND3 - 3.2 DGND3 - 1.4 V TTL (/T, INV) : VIH 2.0 2.0 V : VIL 0.8 0.8 V other (SELECT) : VIH DVCC1 DVCC1 V : VIL DGND1 DGND1 V VID2 (|/E - N/E|) 0.4 0.8 0.4 0.8 V Maximum conversion rate Fc (Straight mode) 100 100 MSPS (DMUX mode) 140 140 MSPS Ambient temperature Ta -20 +75 -20 +75 C
*
* *
*
* *
1 /E and /T indicate CLK/E and CLK/T, etc. for the pin name. 2 VID: Input Voltage Differential ECL and PECL switching level
DGND3 VIH (max.) VIL VTH (DGND3-1.2V) VID VIH VIL (min.)
--2--
CXA3026AQ
Block Diagram
AVCC 5 VRT 11 r1 r/2 r
1
INV 44
DVCC1 30
DVCC2 19 31 42
DGND3 12
8
(MSB) 40 P1D7 39 P1D6 6bits 38 P1D5
r
2
r VRM3 9 r
* * *
63
LATCH A
TTL OUT
8bits
37 P1D4 36 P1D3 35 P1D2
64
r
65
r r
* * *
126
6bits
34 P1D1
6-bit LATCH+ENCODER
127
ENCODER
33 P1D0 (LSB) 8bits
VRM2 7 VIN 6
r
128
r
129
(MSB) 28 P2D7 27 P2D6 26 P2D5
r VRM1 4 r
* * *
191
6bits
LATCH B
TTL OUT
192
r
193
25 P2D4 24 P2D3 23 P2D2 22 P2D1
r r
* * *
254
6bits
255
r2 VRB 2 CLK/T 15 CLK/E 13 CLKN/E 14
r/2
21 P2D0 (LSB) 16
Delay
17 18
N. C.
D RESETN/T 46 RESETN/E 48 RESET/E 47 3 10 AGND
Q Q
Select
43 CLKOUT
45
29
20 32 41 DGND2
1 DVEE3
SELECT DGND1
--3--
CXA3026AQ
Pin Description and I/O Pin Equivalent Circuit Pin No. 3, 10 Symbol AGND I/O Standard voltage level GND +5 V (typ.) GND +5 V (typ.) +5 V (Typ.) (With a single power supply) GND (With dual power supplies) GND (With a single power supply) -5 V (Typ.) (With dual power supplies) 16, 17 N.C. 18 13 CLK/E I Equivalent circuit Description Analog ground. Separated from the digital ground. Analog power supply. Separated from the digital power supply. Digital ground. Digital power supply.
5, 8
AVCC
20, 29 DGND1 32, 41 DGND2 19, 30 DVCC1 31, 42 DVCC2
12
DGND3
Digital power supply. Ground for ECL input. +5 V for PECL and TTL input.
1
DVEE3
Digital power supply. -5 V for ECL input. Ground for PECL and TTL input.
No connected pin. Not connected with the internal circuits. Clock input. CLK/E complementary input. When left open, this pin goes to the threshold potential. Only CLK/E can be used for operation, but complementary input is recommended to attain fast and stable operation. Reset input. When the input is set to low level, the built-in CLK frequency divider circuit can be reset. RESETN/E complementary input. When left open, this pin goes to the threshold voltage. Only RESETN/E can be used for operation. --4--
DGND3
14
CLKN/E
I
r 13 48 r
ECL/ PECL 48 RESETN/E I
14 47
1.2V
r
r
DVEE3
47
RESET/E
I
CXA3026AQ
Pin No.
Symbol
I/O
Standard voltage level
Equivalent circuit
DVCC1 r/2
Description
15
CLK/T
I
Clock input.
TTL
15 46 r
1.5V
46
RESETN/T
I
DGND1 DVEE3
DVCC1
Reset input. When left open, this input goes to high level. When the input is set to low level, the built-in CLK frequency divider circuit can be reset.
44
INV
I
TTL
44
Data output polarity inversion input. When left open, this input goes to high level. (See Table 1. I/O Correspondence Table.)
DGND1 DVEE3
DVCC1
45
SELECT
VCC or GND
45
Data output mode selection. (See Table 2. Operating Mode Table.)
DGND1 DVEE3
--5--
CXA3026AQ
Pin No. 11
Symbol
I/O I
Standard voltage level 4.0 V (typ.) VRB + 3 (VRT - VRB) 4 VRB + 2 (VRT - VRB) 4 VRB + 1 (VRT - VRB) 4
9 11
Equivalent circuit
r1 r/2 r Comparator 1 r r Comparator 63 Comparator 64 Comparator 127 7 r Comparator 128 r Comparator 191 Comparator 192 r Comparator 255
Description Top reference voltage. By-pass to AGND with a 1 F tantal capacitor and a 0.1 F chip capacitor. Reference voltage mid point. By-pass to AGND with a 0.1 F chip capacitor. Reference voltage mid point. By-pass to AGND with a 0.1 F chip capacitor. Reference voltage mid point. By-pass to AGND with a 0.1 F chip capacitor. Bottom reference voltage. By-pass to AGND with a 1 F tantal capacitor and a 0.1 F chip capacitor.
VRT
9
VRM3
7
VRM2
4
VRM1
4
2
VRB
I
2.0 V (typ.)
r/2 2 r2
Comparator AVCC
AVCC
6
VIN
I
VRT to VRB
Analog input.
6 Vref
DVEE3
AGND
33 to 40 21 to 28
P1D0 to P1D7 P2D0 to P2D7
O
DVCC1 DVCC2
Port 1 side data output.
O
TTL
100K
21 to 28 33 to 40 43 DGND2 DVEE3
Port 2 side data output.
43
CLKOUT
O
DGND1
Clock output. (See Table 2. Operating Mode Table.)
--6--
CXA3026AQ
Electrical Characteristics (DVCC1, 2, AVCC, DGND3 = +5 V, DGND1, 2, AGND, DVEE3 = 0 V, VRT = 4 V, VRB = 2 V, Ta = 25 C) Item Resolution DC characteristics Integral linearity error Differential linearity error Analog input Analog input capacitance Analog input resistance Analog input current Reference input Reference resistance Reference current Offset voltage VRT side VRB side Digital input (ECL, PECL) Digital input voltage: High : Low Threshold voltage Digital input current : High : Low Digital input capacitance Digital input (TTL) Digital input voltage: High : Low Threshold voltage Digital input current : High : Low Digital input capacitance Digital output (TTL) Digital output voltage : High : Low Switching characteristics Maximum conversion rate Aperture jitter Sampling delay Clock high pulse width Clock low pulse width RESET Signal setup time RESET Signal hold time CLKOUT output delay Data output delay Output rise time Output fall time EIL EDL CIN RIN IIN Rref3 Iref4 EOT EOB VIH VIL VTH IIH IIL Symbol Conditions Min. Typ. 8 0.5 0.5 21 4 0 75 9.7 2 2
DGND3 - 1.05 DGND3 - 3.2 DGND3 - 1.2
Max.
Unit bits LSB LSB pF k A mA mV mV V V V A A pF V V V A A pF V V MSPS ps ns ns ns ns ns ns ns ns ns ns
VIN = 2 Vp-p, Fc = 5MSPS
VIN = +3.0 V + 0.07 Vrms
50 500 115 17.4 155 28 15 10
DGND3 - 0.5 DGND3 - 1.4
VIH = DGND3 - 0.8 V VIL = DGND3 - 1.6 V
-50 -75
+50 0 5
VIH VIL VTH IIH IIL
2.0 0.8 1.5 VIH = 3.5 V VIL = 0.2 V -50 -500 0 0 5
VOH VOL Fc Taj Tds Tpw1 Tpw0 T_rs T_rh Td_clk Tdo1 Tdo2 Tr Tf
IOH = -2 mA IOL = 1 mA DMUX mode
2.4 0.5 140 3 3.0 3.0 3.5 0 4.5 T5 6.5 10 4.5 6
CLK CLK RESETN - CLK RESETN - CLK DMUX mode 0.8 to 2.0 V 0.8 to 2.0 V (CL = 5 pF) (CL = 5 pF) (CL = 5 pF) (CL = 5 pF) (CL = 5 pF)
7 T+1 8 2 2
8 T+2 10
These characteristics are for PECL input,unless otherwise specified.
--7--
CXA3026AQ
Item Dynamic characteristics Input bandwidth S/N ratio
Symbol
Conditions VIN = 2 Vp-p, -3 dB Fc = 140MSPS, fin = 1 kHz Fs DMUX mode Fc = 140MSPS, fin = 34.999 MHz Fs DMUX mode Fc = 140MSPS, fin = 1 kHz Fs DMUX mode Error>16LSB Fc = 140MSPS, fin = 34.999 MHz Fs DMUX mode Error>16LSB Fc = 100MSPS, fin = 24.999 MHz Fs Straight mode Error>16LSB
Min. 150
Typ.
Max.
Unit MHz dB
46
40
dB TPS6
Error rate
10-12
10-9
TPS
10-9
TPS
Power supply Supply current Supply current Power consumption
ICC IEE Pd7
110 0.4 570
150 0.6 790
180 0.8 960
mA mA mW
3 Rref: Resistance value between VRT and VRB 4 Iref = VRT - VRB Rref 5 T = 1 Fc 6 TPS: Times Per Sample 2 7 Pd = (ICC + IEE) VCC + (VRT - VRB) Rref
INV VIN Step D7 VRT 255 254 ... 128 127 ... 1 0 1 D0 D7 0 D0
11111111 11111110 ... 10000000 01111111 00000001 00000000 ...
00000000 00000001 01111111 10000000 11111110 11111111 ... --8-- ...
VRM2
VRB
Table 1. I/O Correspondence Table
CXA3026AQ
Electrical Characteristics Measurement Circuit Current Consumption Measurement Circuit
Sampling Delay Measurement Circuit Aperture Jitter Measurement Circuit
100MHz
5V
5V
Amp OSC1 : Variable VIN fr CLK
CXA3026AQ
A Icc
4V VRT AVCC DVCC1 DVCC2
A IEE
DGND3
8
Logic Analizer 1024 samples
1.95V
VIN
CLK/E
5MHz PECL OSC2
2V
VRB
DGND2 DGND1 AGND
ECL Buffer DVEE3 100MHz
Integral Linearity Error Measurement Circuit Differential Linearity Error Measurement Circuit
Aperture Jitter Measurement Method
VRT +V S2 S1 : ON when AB VIN VRM2 VRB
S1
CLK t VIN 129 128 127 126 125
-V AB Comparator VIN
CXA3026AQ
(LSB)
8
A8 to A1 "0" A0
B8 to B1 B0
8
Buffer CLK Sampling timing fluctuation (= aperture jitter)
"1" 000...00 to 111...10 Where (LSB) is the deviation of the output codes when the largest slew rate point is sampled at the clock which has exactly the same frequency as the analog input signal, the aperture jitter Taj is: Taj = / t = / ( 256 2 x 2 f )
DVM Controller
Error Rate Measurement Circuit
Signal Source Fc 4 -1kHz 2Vp-p Sin Wave 16LSB Signal Source Fc 1/8 VIN CXA3026AQ CLK CLK 8 Latch A B + Latch
Comparator A>B
Pulse Counter
--9--
CXA3026AQ
Description of Operating Modes The CXA3026AQ has two types of operating modes which are selected with Pin 45 (SELECT). Operating mode DMUX mode Straight mode SELECT VCC GND Maximum conversion rate 140MSPS 100MSPS Data output Demultiplexed output 70 Mbps Straight output 100 Mbps Clock output The input clock is 1/2 frequency divided and output. 70 MHz The input clock is inverted and output. 100 MHz
Table 2. Operating Mode Table
1. DMUX mode (See Application Circuit 1- (1), (2) and (3).) Set the SELECT pin to VCC for this mode. In this mode, the clock frequency is divided by 2 in the IC, and the data is output after being demultiplexed by this 1/2 frequency divided clock. The 1/2 frequency divided clock, which has adequate setup time and hold time for the output data, is output from the CLKOUT pin. When resetting this 1/2 frequency divided clock, the low level of the RESET signal should be input to the RESETN pin (Pin 46 or 48). The RESET signal requires the setup time (T_rs 3.5 ns) and hold time (T_rh 0 ns) to the clock rising edge because it is synchronized with and taken in the clock. Therefore, set the RESET signal to low for T_rs (min.) + T_rh (min.) = 3.5 ns or longer to the clock rising edge. The reset period can be extended by making the low level period of the RESET signal longer because the clock output pin is fixed to low (reset) during the low level period at the clock rising edge. If the reset start timing is regarded as not important, the timing where the RESET signal is set from high to low is not so consequence. However, when the reset is released this timing must become significant because the timing is used to commence the 1/2 frequency divided clock. In this case, the setup time (T_rs) is also necessary. See the timing chart for detail. (This chart shows the example of reset for 2T). The A/D converter can operate at FC (min.) = 140MSPS in this mode.
--10--
CXA3026AQ
When the RESET signal is not used.
CLK
CXA3026AQ CLK
CLK RESETN
CLKOUT 8bit DATA
A
CXA3026AQ
CLK RESETN
CLKOUT 8bit DATA
B
When the RESET signal is used.
CLK RESET signal CXA3026AQ CLK
CLK RESETN
CLKOUT 8bit DATA
(Reset period)
A
CXA3026AQ
CLK
CLKOUT 8bit DATA
(Reset period)
B
RESET signal
RESETN
2. Straight mode (See Application Circuits1- (4), (5) and (6).) Set the SELECT pin to GND for this mode. In this mode, data output can be obtained in accordance with the clock frequency applied to the A/D converter for applications which use the clock applied to the A/D converter as the system clock. The A/D converter can operate at Fc (min.) = 100MSPS in this mode.
Digital input level and supply voltage settings The logic input level for the CXA3026AQ supports ECL, PECL and TTL levels. The power supplies (DVEE3, DGND3) for the logic input block must be set to match the logic input (CLK and RESET signals) level. Digital input level ECL PECL TTL DVEE3 -5 V 0V 0V DGND3 0V +5 V +5 V Supply voltage Application circuits 5 V +5 V +5 V (1) (2) (3) (4) (5) (6)
Table 3. Logic Input Level and Power Supply Settings
--11--
CXA3026AQ
Application Circuit 1 (1) DMUX ECL input
ECL RESET signal
-5V (D) DG
+5V(A) -5V(D) AG AG AG
48 47 46 45 44 43 42 41 40 39 38 37 1 36 35 34 33 32 31 30 29 28 27 26 25 13 14 15 16 17 18 19 20 21 22 23 24 P2D0 to P2D7 8-bit Digital Data Latch 2 3 4 5 6 7 8 9 P1D0 to P1D7 8-bit Digital Data Latch
8-bit Digital Data
2V
+5V(A)
DG AG AG
10
DG DG +5V (D)
4V
11 12
8-bit Digital Data
ECL-CLK DG +5V(D)
(2) DMUX PECL input
+5V (D) DG PECL RESET signal
+5V(A) AG AG DG AG
48 47 46 45 44 43 42 41 40 39 38 37 1 36 35 34 33 32 31 30 29 28 27 26 25 13 14 15 16 17 18 19 20 21 22 23 24 P2D0 to P2D7 8-bit Digital Data 2 3 4 5 6 7 8 9 10 P1D0 to P1D7 8-bit Digital Data Latch
8-bit Digital Data
2V
+5V(D) AG AG
+5V(A)
DG DG +5V (D)
4V
11 12
8-bit Digital Data Latch
PECL-CLK DG +5V(D)
(3) DMUX TTL input
-5V (D) DG TTL RESET signal
AG AG DG
48 47 46 45 44 43 42 41 40 39 38 37 1 36 35 34 33 32 31 30 29 28 27 26 25 13 14 15 16 17 18 19 20 21 22 23 24 2 3 4 5 6 7 8 9 10 P1D0 to P1D7 8-bit Digital Data Latch
8-bit Digital Data
+5V(A) AG
2V
+5V(D) +5V(A) AG AG
DG DG +5V (D)
4V
11 12
8-bit Digital Data P2D0 to P2D7 8-bit Digital Data Latch
TTL-CLK DG +5V(D)
--12--
CXA3026AQ
(4) Straight ECL input
DG -5V (D) DG
-5V(D) AG AG
48 47 46 45 44 43 42 41 40 39 38 37 1 36 35 34 33 32 31 30 29 28 27 26 25 13 14 15 16 17 18 19 20 21 22 23 24 2 3 4 5 6 7 8 9 P1D0 to P1D7 8-bit Digital Data Latch
8-bit Digital Data
+5V(A) AG
2V
+5V(A)
DG AG AG
10
4V
11 12
ECL-CLK ECLTTL DG +5V(D)
(5) Straight PECL input
DG +5V (D) DG
+5V(A) AG AG DG AG
48 47 46 45 44 43 42 41 40 39 38 37 1 36 35 34 33 32 31 30 29 28 27 26 25 13 14 15 16 17 18 19 20 21 22 23 24 2 3 4 5 6 7 8 9 10 P1D0 to P1D7 8-bit Digital Data Latch
DG
DG +5V (D)
8-bit Digital Data
2V
+5V(D) AG AG
+5V(A)
4V
11 12
PECL-CLK PECLTTL DG +5V(D)
(6) Straight TTL input
DG +5V (D) DG
+5V(A) AG AG DG AG
48 47 46 45 44 43 42 41 40 39 38 37 1 36 35 34 33 32 31 30 29 28 27 26 25 13 14 15 16 17 18 19 20 21 22 23 24 2 3 4 5 6 7 8 9 10 P1D0 to P1D7 8-bit Digital Data Latch
DG DG +5V (D)
8-bit Digital Data
2V
+5V(D) AG AG
+5V(A)
4V
11 12
TTL-CLK
DG +5V(D)
--13--
DG DG +5V (D)
CXA3026AQ
Application Circuit 2
Straight Mode TTL I/O (When a single power supply is used)
AG
Analog input
4V +5V (D) DG AG 1F AG 10F short short 10F +5V (A)
AG 2V
1F A G
12
11
10
9
8
7
6
5
4
3
2
1
AGND
13 CLK/E
DGND3
RESETN/E 48 RESET/E 47 RESETN/T 46 SELECT 45 INV 44 CLKOUT 43 DVCC2 42 DGND2 41 P1D7 40 P1D6 39 P1D5 38
14 CLKN/E 15 TTL CLK 16 N.C. 17 N.C. 18 N.C. 19 DVCC2 20 DGND2 21 P2D0 22 P2D1 23 P2D2 CLK/T
DGND1
DGND2
DVCC1
DVCC2
24 P2D3
DVEE3
P1D4 37 36
VRT
AGND
VRM3
AVCC
VRM2
VIN
AVCC
VRM1
P1D0
P1D1
VRB
35
P2D4
P2D5
P2D6
P2D7
25
26
27
28
29
30
31
32
33
34
P2D2 P2D3
P2D6
P1D2
P1D3
(MSB) P2D7
Short the analog system and digital system at one point immediately under the A/D converter. See the Notes on Operation. is the chip capacitor of 0.1F.
Application circuits shown are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits or for any infringement of third party patent and other right due to same.
--14--
P1D6 (MSB) P1D7
(LSB) P2D0 P2D1
(LSB) P1D0
P2D4
P2D5
P1D1
P1D2
P1D3
P1D4 P1D5
CXA3026AQ
DMUX Mode Timing Chart (Select = VCC)
Tds N-1 VIN N+3 N T N+1 CLK Tpw1 Tpw0 Tdo2;8ns (typ.) 6.5ns (min.) 10ns (max.) P1D0 to D7 N+1 2.0V 0.8V N+3 N+2 N+4 4.5ns (typ.) N+5 N+6 N+7
P2D0 to D7
N
2.0V 0.8V T Tdo1
N+2 T
Td_clk;7ns (typ.) 8ns (max.) 4.5ns (min.) (Reset period) 2.0V 0.8V 4.5ns (min.) 8ns (max.) Td_clk 2.0V 0.8V
T+1ns (typ.)
2.0V 0.8V
CLK OUT
T_rh
T_rs
T_rh
T_rs
RESET signal
Straight Mode Timing Chart (Select = GND)
N+2 N+1 Tds 4.5ns (typ.) T N
N-1 VIN
N+3
CLK Tpw1 Tpw0
Tdo2;8ns (typ.) 6.5ns (min.) 10ns (max.) P1D to D7 N-4 2.0V 0.8V N-3 N-2 N-1 N
P2D0 to D7
N-5
2.0V 0.8V
N-4
N-3
N-2
N-1
Td_clk;7ns (typ.) 4.5ns (min.) 8ns (max.) CLK OUT (CLK is inverted and output.) 2.0V 0.8V
RESET signal
--15--
CXA3026AQ
A/D Converter and Peripheral Circuit Timing In the maximum clock rate of the DEMUX Mode, the timing of 3 channels of ADC CLKOUT in same phase is described in detail as below. For example, the CLK OUT from one of the ADC is used as the data latch clock. The clock delay and data delay are showed in the following specification, i,e. Td_clk 4.5 nS (min.) --- 8.0 nS (max.) Tdo2 6.5 nS (min.) --- 10 nS (max.) These values are considered in all the temperature change and power supply variation. When the maximum clock rate 140MSPS is used, the set-up time (ts) is seemed to be very small from above specifications. But the 3 channels of ADC are in the same circuit board, so that the DATA OUT delay and CLK OUT delay will be changed in same trend at the same condition of the temperature change and power supply variation. As a result, 0.5 ns of the delay will be faster, when the highest temperature and highest power supply is used. Also, 0.5 ns of the delay will be later, when the lowest temperature and lowest power supply is used. These delay can be omitted in this case. When Ta=25 C, VCC=+5 V, the clock delay and data delay are Td_clk 5.0 nS (min.) --- 7.5 nS (max.) Tdo2 7.0 nS (min.) --- 9.5 nS (max.) The timing of the DATA OUT and CLK OUT with above delay variation is showed in below. Consequently, the set-up time for the data latching can be obtained as ts (min.)=2.5 nS. The output delay change of the DATA OUT and CLK OUT due to the temperature change and the power supply variation should have the same trend of the delay change, the minimum ts=2.5 ns can be guaranteed at any temperature change and power supply variation.
CXA3026AQ 8bit
Gate Array Latch 8bit
Analog input R
Vin CLK RESET
P1D/out P2D/out CLKOUT
CXA3026AQ 8bit
Analog input G
Vin CLK RESET
P1D/out 8bit P2D/out CLKOUT
CXA3026AQ 8bit
Analog input B CLK RESET
Vin CLK RESET
P1D/out 8bit P2D/out CLKOUT
7ns (=1/140MSPS)
CLK
th-reset
RESET signal
Td-clk (min) 5.0ns (4.5ns) Td-clk (max)
CLKOUT
7.5ns (8.0ns) Tdo2 (min) 7.0ns (6.5ns) Tdo2 (max) 9.5ns (10ns)
ts (min) 2.5ns
th (min) 6.5ns
P1D/out P2D/out
14ns
Remark : In the timing chart, the values in the brackets ( ) are included all the temperature change and the power supply variation.
--16--
CXA3026AQ
Notes on Operation * The CXA3026AQ is a high-speed A/D converter which is capable of TTL, ECL and PECL level clock input. Characteristic impedance should be properly matched to ensure optimum performance during high-speed operation. * The power supply and grounding have a profound influence on converter performance. The power supply and grounding method are particularly important during high-speed operation. General points for caution are as follows. -- The ground pattern should be as large as possible. It is recommended to make the power supply and ground patterns wider at an inner layer using a multi-layer board. -- To prevent interference between AGND and DGND and between AVCC and DVCC, make sure the respective patterns are separated. To prevent a DC offset in the power supply pattern, connect the AVCC and DVCC lines at one point each via a ferrite-bead filter Shorting the AGND and DGND patterns in one place immediately under the A/D converter improves A/D converter performance. -- Ground the power supply pins (AVCC, DVCC1, DVCC2, DVEE3) as close to each pin as possible with a 0.1 F or larger ceramic chip capacitor. (Connect the AVcc pin to the AGND pattern and the DVCC1, DVCC2 and DVEE3 pins to the DGND pattern.) -- The digital output wiring should be as short as possible. If the digital output wiring is long, the wiring capacitance will increase, deteriorating the output slew rate and resulting in reflection to the output waveform since the original output slew rate is quite fast. * The analog input pin VIN has an input capacitance of approximately 21 pF. To drive the A/D converter with proper frequency response, it is necessary to prevent performance deterioration due to parasitic capacitance or parasitic inductance by using a large capacity drive circuit. keeping wiring as short as possible, and using chip parts for resistors and capacitors, etc. * The VRT and VRB pins must have adequate by-pass to protect them from high-frequency noise. By-pass them to AGND with approximately 1 F tantal capacitor and, 0.1 F chip capacitor as short as possible. * If the CLK/E pin is not used, by-pass this pin to DGND with an approximately 0.1 F capacitor. At this time, approximately DGND3 - 1.2 V voltage is generated. However, this is not recommended for use as threshold voltage VBB as it is too weak. * When the digital input level is ECL or PECL level, /E pins should be used and /T pins left open. When the digital input level is TTL, /T pins should be used and /E pins left open. * The CXA3026AQ uses the package with low thermal resistance, but the resistance varies according to the board used. Therefore, cool the package by air cooling and others referring to the right graph.
Allowable ambient temperature vs. Wind velocity 90
Ta-Allowable ambient temperature (C)
Four-layer board 80 Double-layer board 70 Single layer board 60
Board conditions; 76mm x 114mm, 1.6t when glass epoxy board mounted
0
1
2
3
Wind velocity (m/s)
--17--
CXA3026AQ
Example of Representative Characteristics
Current consumption vs. Ambient temperature characteristics
170
Current consumption vs. Conversion rate characteristics response
170
Current consumption [mA]
160
Current consumption [mA]
160 fCLK 4 -1kHz
150
150
fin=
DMUX mode CL=5pF 140
140
130 -25 25 Ta--Ambient temperature [C] 75
130 0 70 Fc - Conversion rate [MSPS] 140
Analog input current vs. Analog input voltage characteristics
20 200
Reference current vs. Ambient temperature characteristics
Analog input current [A]
VRT=4V VRB=2V
Reference current [mA]
3 4
15
100
10 0 2 -25 25 Ta--Ambient temperature [C] 75 Analog input voltage [V]
--18--
CXA3026AQ
SNR vs. Input frequency response
50
Error rate vs. Conversion rate characteristics
10 -6 fCLK -1kHz 4 Error>16LSB fin=
40
Error Rate [TPS]
30
10 -7
SNR [dB]
10 -8
30 Fc=140MSPS
10 -9
20 1 3 5 10 50
10
-10
140
160 Fc-Conversion rate [MSPS]
180
Input frequency [MHz]
Maximum conversion rate vs. Ambient temperature characteristics
Fc-Maximum conversion rate [MSPS]
180 fCLK -1kHz 4 Error>16LSB Error rate: 10-9 TPS fin=
170
160
150
140 -25 25 Ta--Ambient temperature [C] 75
--19--
CXA3026AQ
CXA3026AQ Evaluation Board Description The CXA3026AQ Evaluation Board is a special board designed to maximize and facilitate the evaluation performance of the CXA3026AQ. After latching the CXA3026AQ output data with a frequency divided clock, the analog signal can be regenerated by a 10-bit high-speed D/A converter. The latched data can also be extracted externally via a 24-pin cable connector. Features * Resolution: * Maximum conversion rate: * Supply voltage: * Dual analog input pins:
8 bits 140MSPS (min.) 5.0 V DIR.IN: AC coupling input pin AMP.IN: Operational amplifier input pin * Clock frequency division: 1/1 to 1/16 Absolute Maximum Ratings * Supply voltage VCC VEE +AMP -AMP
-0.5 to +7.0 -7.0 to +0.5 -0.5 to +7.0 -7.0 to +0.5
V V V V Min. +4.75 -5.50 +3 -7 9 -0.75 1.5 0.8 Typ. +5.0 0 -5.0 +5 -5 10 0 2.0 1.0 Max. +5.25 -4.75 +7 -3 11 +1.05 2.2 1.2
Recommended Operating Conditions * Supply voltage VCC GND VEE +AMP -AMP | (+AMP) - (-AMP) | * Analog input AMP. IN DIR. IN * Clock input CLK. IN
V V V V V V V Vp-p Vp-p
--20--
Block Diagram
VRB. R1 OFFSET. R3 SELECT DMUX Straight INV SW1 SW2 SW3 D / A OUT (-1.0V) Vrt OFFSET
VRT. R2
A/D D/A INV INV NORM
FULL SCALE. R4 FULL SCALE. R5
Vrb
D / A OUT (-1.0V)
CON2
DIR IN 8 270 Vrt P1D0 to D7 A VIN CXA3026AQ P2D0 to D7 VRB CLK VBB (PECL) (TTL) CLKOUT 8 x (-2) Vrb B S1 VRT (TTL) (TTL) 8 8
LATCH
AGND
TTL / ECL
AGND
(ECL)
DAC
51
CON4 P1 side OUT AGND
CON1
130
AMP IN
82
LATCH
CON3
CLK IN
TTL / ECL
1k
390
(TTL)
(ECL)
DAC
Counter
PECL / TTL
-AMP
+AMP
VEE
GND
VCC CON7 P1 side DATA CON8 P2 side DATA
CON6
TTL / ECL
--21--
8 4 (PECL) (TTL) S2 4 (TTL)
AGND
AGND
AGND
8
CON5 P2 side OUT AGND
51
0.1F
DGND
DGND
1k
(ECL)
CXA3026AQ
CXA3026AQ
Pin Description and I/O Level Pin No. CON1 CON2 Symbol AMP. IN DIR. IN I/O I I Standard I/O level 0.95 Vp-p 2.0 Vp-p Current Description Doubles the analog input signal amplitude using the operational amplifier. The input impedance is 50 . AC coupling input. Suitable for sine waves and other repeating waveforms. The input impedance is 50 . The CXA3026AQ operates at the PECL level clock using the sine wave-to-PECL conversion circuit. The input impedance is 50 . Allows the D/A converted waveform of the CXA3026AQ port 1 side data to be observed. The output impedance is 50 . Allows the D/A converted waveform of the CXA3026AQ port 2 side data to be observed. The output impedance is 50 . 0.8A The inside of the board is divided into analog and digital systems. -0.6A 40 mA -40 mA + side power supply for the operation amplifier. - side power supply for the operation amplifier. The CXA3026AQ port 1 side data output is latched at the frequency divided clock and then output. The CXA3026AQ port 2 side data output is latched at the frequency divided clock and then output.
CON3
CLK. IN
I
1.0 Vp-p
CON4
P1 side OUT
O
0 to -1 V
CON5
P2 side OUT VCC GND
O I I I I I O O
0 to -1 V +5.0 V 0V -5.0 V +5.0 V -5.0 V TTL TTL
CON6
VEE +AMP -AMP
CON7 CON8
P1 side DATA P2 side DATA
Board Adjustments and Settings 1. VRB.R1: CXA3026AQ VRB voltage adjusting volume. 2. VRT.R2: CXA3026AQ VRT voltage adjusting volume. 3. OFFSET.R3: Adjusting volume for matching the AMP.IN input and DIR.IN input signal ranges to the CXA3026AQ input range. 4. FULL SCALE.R4: Full-scale adjusting volume for the port 1 D/A output. (-1 V: Typ.) 5. FULL SCALE.R5: Full-scale adjusting volume for the port 2 D/A output. (-1 V: Typ.) 6. S1: Switching junction for the dual analog input pins. Set as follows according to the input pins used. Junction Symbol AMP.IN DIR.IN 7. S2: A OPEN 0.1 F B SHORT 10 k
8. SW1 SELECT: 9. SW2 A/D INV: 10. SW3 D/A INV:
Setting junction for the clock frequency division ratio. The operating speed after latching is determined by the frequency division ratio set here. When set to CLK OUT, it operates according to the CXA3026AQ clock output. CXA3026AQ output mode selector switch. CXA3026AQ output polarity inversion switch. D/A converter output polarity inversion switch. --22--
CXA3026AQ
Notes on Board Operation 1. The factory settings for the CXA3026AQ Evaluation Board are as follows. VRB.R1 = 1.5 V VRT.R2 = 3.0 V OFFSET.R3 = 2.25 V FULL SCALE.R4 = -1 V FULL SCALE.R5 = -1 V S1 A ... OPEN, B...SHORT S2 8 ... SHORT (1/8 frequency division)
When using the board in this condition, the input signals should be input at the amplitudes shown below. (The frequency is set as desired.) Analog input signal: CON1 (AMP.IN)
0V center, 800mVp-p or less
Clock input signal: CON3 (CLK.IN)
0V center, 1.0Vp-p
2.
When the analog signal is input from the CON1 (AMP.IN) pin, IC2:CLC404 limits the input dynamic range of the A/D converter's analog input signal according to the +AMP and -AMP supply voltages. The power supply for the operational amplifier can also be shifted to +AMP = +7.0 V and -AMP = -3.0 V to allow use with a wider input dynamic range. When the analog input signal is a sine wave or other repeating waveform, the signal can be input from the CON2 (DIR.IN) pin with AC coupling. In these cases, the input dynamic range is not limited by the +AMP and -AMP supply voltages, but the VRT level may be limited by IC3:NJM3403A. Therefore, the power supply for the operational amplifier should be shifted in the same manner as in 2. above.
3.
4.
In the evaluation board of the CXA3026AQ,CLC404 (Comlinear) is employed for IC2 to drive the analog input signal. Though,CLC505 (Comlinear) can also be used instead of CLC404, there should be a little change in the peripheral circuit in this case.
--23--
CXA3026AQ
CXA3026AQ Evaluation Board Timing Chart
N N+1 CON2 DIR IN 2Vp-p 0V
N+3
N+2
CON3 CLK IN
1Vp-p
0V
CXA3026AQ CLK
(PECL)
CXA3026AQ P1 side DATA
(TTL)
N-4
N-3
N-2
N-1
Approximately 6.0ns
CON7 P1 side DATA CLK
(TTL) Approximately 9.0ns
CON7 P1 side DATA DATA
(TTL)
N-6
N-4
N-2
N-6 CON4 P1 side OUT (Analog regeneration waveform) 0 to -1V N-4 N-2
Operating Conditions CXA3026AQ operating mode : Straight mode : DIR IN pin input Anaiong : 1/2 frequency divided clock S2 setting
--24--
CXA3026AQ
Circuit Diagram
CON6 -AMP +AMP VEE GND VCC
L1 C1 33F C2 33F C3 33F
L2 C4 33F
L3
L4 C5 33F
L5
L6
C6 33F
-AMP
+AMP
AVEE
DVEE
AGND
DGND
AVCC
DVCC DGND SW3 D / A INV SW2 A / D INV SW1 DVCC SELECT DVCC DGND C29 0.1F D / A INV CLKOUT
C28 0.1F
AGND
-AMP
AGND
-AMP
C7 1F AGND
C16 0.1F
C8 1F
C17 0.1F
P1D7 P1D6 P1D5 P1D4 P1D3
CLKOUT
SELECT
RESETN / T
RESET / E
DGND
RESETN / E
DGND2
DVCC2
P1D7
P1D6
P1D5
P1D4
INV
R7 510 R1 2k D1 TL431CP R8 510 R2 1k R3 10k
R9 7.5k 2 3 11
R12 390k 1 4 IC3A NJM3403A
48 47 46 45 44 43 42 41 40 39 38 37 IC3B NJM3403A 6 7 5 AGND CON2 DIR IN AGND R18 51 A B R17 43 S1 AVCC C22 0.1F C21 0.1F DVCC C24 0.1F C26 0.1F C11 1F AGND C20 0.1F C23 C25 0.1F 0.1F
P1D2 P1D1 P1D0
R10 22k
R11 200k AGND
1 DVEE3 2 VRB 3 AGND 4 VRM1 5 AVCC 6 VIN 7 VRM2 8 AVCC 9 VRM3 10 AGND 11 VRT 12 DGND3 C27 0.1F CLK / E DGND IC1 CXA3026AQ
P1D3 36 P1D2 35 P1D1 34 P1D0 33 DGND2 32 DVCC2 31 DVCC1 30 DGND1 29 P2D7 28 P2D6 27 P2D5 26 P2D4 25 CLKN / E DGND2 CLK / T P2D7 P2D0 P2D1 P2D2 P2D3 P2D6 P2D5 P2D4 P2D3 P2D2 P2D1 P2D0 C34 0.1F C33 0.1F DGND DVCC DGND
R6 51 AVCC CON1 AMP IN R13 82 AGND AGND R14 130
R15 270
2 3 AGND
R16 4 270 6 IC2 7 CLC404
AGND
IC3C NJM3403A 10 8 9 C9 1F AGND C18 0.1F +AMP C10 1F AGND C19 0.1F +AMP
C12 1F
13 14 15 16 17 18 19 20 21 22 23 24 C30 0.1F DVCC R28 R29 82 82 IC4A 10H116 (PECL) 5 4 R24 130 3 2 IC4C 10H116 (PECL) 13 12 15 14 R30 82
DVCC
CON3 CLK IN DGND
C15 0.1F R19 51 DGND
IC4B 10H116 (PECL) 10 9 R20 1k 11 R21 390 R22 1k 7 6
R23 82
R27 130 DGND R25 R26 130 130
DVCC2
N.C.
N.C.
N.C.
DGND
13 CLK 9 S1 7 S2 IC5 10H136 (PECL) 12 D0 11 D1 6 D2 5 D3
Cout 4
IC4D 10H116(PECL)
DGND DVCC
Q3 3 Q2 2 Q1 15 Q0 14
1 / 16 1/8 1/4 1/2
CLK CLKN
--25--
CXA3026AQ
DGND DVcc 1 C35 0.1F P1D7 P1D6 P1D5 P1D4 P1D3 P1D2 P1D1 P1D0 IC14 74ALS34 1 2 DGND 1 OC 11 CLK P1D7 P1D6 P1D5 P1D4 P1D3 P1D2 P1D1 P1D0 2 1D 3 2D 4 3D 5 4D 6 5D 7 6D 8 7D 9 8D IC6 74AS574 1Q 19 2Q 18 3Q 17 4Q 16 5Q 15 6Q 14 7Q 13 8Q 12 P1D7 P1D6 P1D5 P1D4 P1D3 P1D2 P1D1 P1D0 16 S DVEE 11 IN8 12 IN7 13 IN6 14 IN5 17 IN4 18 IN3 19 IN2 20 IN1 IC9 MB767 OUT8 10 OUT7 9 OUT6 8 OUT5 7 OUT4 4 OUT3 3 OUT2 2 OUT1 1 1 MSB 2 D2 3 D3 4 D4 5 D5 6 D6 7 D7 8 D8 9 D9 DVEE C44 0.1F R48 620 R37 82 DGND C45 0.1F 1 OC 11 CLK P2D7 P2D6 P2D5 P2D4 P2D3 P2D2 P2D1 P2D0 2 1D 3 2D 4 3D 5 4D 6 5D 7 6D 8 7D 9 8D IC7 74AS574 1Q 19 2Q 18 3Q 17 4Q 16 5Q 15 6Q 14 7Q 13 8Q 12 P2D7 P2D6 P2D5 P2D4 P2D3 P2D2 P2D1 P2D0 16 S DVEE 11 IN8 12 IN7 13 IN6 14 IN5 17 IN4 18 IN3 19 IN2 20 IN1 IC10 MB767 OUT8 10 OUT7 9 OUT6 8 OUT5 7 OUT4 4 OUT3 3 OUT2 2 OUT1 1 R38 82 R49 620 10 LSB 11 NC 12 NC 13 CLKN 14 CLK IC12 CX20201-1 AGND 28 VREF 27 AVEE 26 NC 25 NC 24 NC 23 NC 22 NC 21 OUT 20 NC 19 AGND 18 DGND 17 INV 16 DVEE 15 C53 0.1F DVEE AGND DGND AGND CON4 P1 side OUT C52 0.1F D2 TL431CP C13 1F AVEE C51 0.1F R4 2k R42 1k R43 270 IC14 74ALS34 3 4 5 9 11 13 1 3 5 6 8 10 12 2 4 6 CON7 P1 side DATA 2
IC15 74ALS34 DGND
25 26
DGND C43 0.1F
R47 620
AGND
DGND
R39 130 R40 130 DVEE 1 MSB 2 D2 3 D3 4 D4 5 D5 6 D6 7 D7 8 D8 9 D9 10 LSB IC13 CX20201-1 AGND 28 VREF 27 AVEE 26 NC 25 NC 24 NC 23 NC 22 NC 21 OUT 20 NC 19 AGND 18 DGND 17 INV 16 DVEE 15 C56 0.1F DVEE AGND DGND AGND CON5 P2 side OUT C55 0.1F D3 TL431CP C14 1F AVEE C54 0.1F AGND
R5 R44 2k 1k
R45 270
D / A INV CLKOUT
DVEE C46 0.1F DGND DGND R46 620 19 OE 17 VBB CLKOUT 24 D0 1 D0N 23 D1 22 D1N 21 D2 20 D2N 16 D3 15 D3N 14 D4 13 D4N 12 D5 11 D5N Q5 10 S2 C39 0.1F Q4 9 1/1 DVCC 1 2 IC8 100390 Q2 4 1/4 Q3 8 1/2 11 A4 10 A3 Q1 3 1/8 7 A2 Q0 2 1 / 16 5 A1 IC11 10H124 6B Y1 2 Y1 4 Y2 1 Y2 3 Y3 15 Y3 12 Y4 14 Y4 13 R50 620
11 NC 12 NC 13 CLKN 14 CLK
DGND 1 / 16
1/8
C50 0.1F DGND R41 620 DVEE
1/4
1/2
CLK CLKN DVCC R31 82 R32 82 C32 0.1F R33 82 R34 130 R35 130 R36 130 DGND
P2D7 P2D6 P2D5 P2D4 P2D3 P2D2 P2D1 P2D0
IC15 74ALS34 8 9 11 13 1 3 5 9 11 10 12 2 4 6 8 10
CON8 P2 side DATA
DGND
IC16 74ALS34
25 26 DGND
--26--
CXA3026AQ
Component List
No. Product name IC1 CXA3026AQ IC2 CLC404AJE IC3 NJM3403AM IC4 MC10H116L IC5 MC10H136L IC6, 7 74AS574N IC8 100390 IC9, 10 MB767P IC11 MC10H124L IC12, 13 CXA20201A-1 IC14 to 16 74ALS34 D1 to 3 TL431CP SW1 to 3 ATE1D-2F3-10 S1, 2 JX-1 CON1 to 5 01K0315 CON6 TJ-563 CON7, 8 (FAP-2601-1202) L1 to 6 ZBF503D-00 C1 to 6 Tantal capacitor C7 to 12 Tantal capacitor C15 Ceramic capacitor All parts other than those listed above Chip capacitor Function 8-bit A/D converter OP-AMP OP-AMP ECL Buffer ECL Countor TTL Latch PECLTTL conversion TTLECL conversion TTLECL conversion 10-bit D/A converter TTL Buffer Shunt regulator Toggle switch Short pin BNC connector Power supply connector Flat cable connector Ferrite-bead filter 33F 1F 0.1F 0.1F No. R2 R1, 4, 5 R3 R46 to 50 R6, 18, 19 R7.8 R9 R10 R11 R12 R13, 23, 28 to 33, 37, 38 R14, 24 to 27, 34 to 36, 39, 40 R15, 16, 43, 45 R17 R20, 22, 42, 44 R21 R41 Product name RJ-5W-1K RJ-5W-2K RJ-5W-10K RGLD4X621J Function 1k volume resistor 2k volume resistor 10k volume resistor 620 network resistor
FRD-25SR (0.25W) 51 FRD-25SR (0.25W) 510 FRD-25SR (0.25W) 7.5k FRD-25SR (0.25W) 22k FRD-25SR (0.25W) 200k FRD-25SR (0.25W) 390k FRD-25SR (0.25W) 82 FRD-25SR (0.25W) 130 FRD-25SR (0.25W) 270 FRD-25SR (0.25W) 43 FRD-25SR (0.25W) 1k FRD-25SR (0.25W) 390 FRD-25SR (0.25W) 620
CON7 and 8 are not mounted when boards are shipped. (Manufacturer: YAMAICHI Electronics Co., Ltd.)
74ALS34
74ALS34
Component side silk diagram --27--
74ALS34
CXA3026AQ
Component side pattern diagram
Solder side pattern diagram --28--
CXA3026AQ
Package Outline
Unit : mm
48PIN QFP (PLASTIC)
15.3 0.4 + 0.4 12.0 - 0.1 + 0.1 0.15 - 0.05
36
25
0.15
37
24
48
13
+ 0.2 0.1 - 0.1
1 + 0.15 0.3 - 0.1
12
0.8
0.12 M
+ 0.35 2.2 - 0.15
PACKAGE STRUCTURE
PACKAGE MATERIAL SONY CODE EIAJ CODE JEDEC CODE QFP-48P-L04 QFP048-P-1212-B LEAD TREATMENT LEAD MATERIAL PACKAGE WEIGHT EPOXY RESIN SOLDER / PALLADIUM PLATING COPPER / 42 ALLOY 0.7g
NOTE : PALLADIUM PLATING This product uses S-PdPPF (Sony Spec.-Palladium Pre-Plated Lead Frame).
--29--
0.9 0.2
13.5

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