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Video ICs
Equalizer and ATF circuit IC for Digital VCRs
BH7273KV
The BH7273KV is an equalizer and ATF circuit IC developed for use with digital video cassettes (DVC). By using this IC, it is simple to design the filter for the equalizer required for DVD sets. In addition, the ATF circuit detects the pilot signals and generates error signals.
*Applications ATFs for digital VCRs Equalizers and *Features the configuring of all pass filters, 1 + D cir1) Enables
cuits, and transversal filters (TVF). 2) Built-in VCA, amplifier, buffer, and mixer amplifier. 3) Detects the ATF pilot signal and generates an ATF error signal. 4) Built-in 1.5MHz LPF, VCA, 465kHz BPF, 697.5kHz BPF, 25dB amplifier, peak detector, and subtractor. 5) Intermediate frequencies are variable by controlling the voltages for the 465kHz BPF and 697.5kHz BPF.
*Absolute maximum ratings (Ta = 25C)
Parameter Applied voltage Power dissipation Operating temperature Storage temperature Symbol VCC Pd Topr Tstg Limits 7.0
1000
Unit V mW C C
- 20 ~ + 65 - 55 ~ + 125
When mounted on a 70mm x 70mm x 1.6mm glass epoxy board. Reduced by 10.0mW for each increase in Ta of 1C over 25C.
*Recommended operating conditions (Ta = 25C)
Parameter Power supply voltage Symbol VCC 5V Min. 4.6 Typ. 4.9 Max. 5.2 Unit V Conditions 2, 15, 21, 33, 44, 48, 60pin
Not designed for radiation resistance.
1
Video ICs
BH7273KV
*Block diagram
OFFSET BIAS OUT SUBSTRACT OUT OFFSET BIAS F2 DET OUT F1 DET OUT MIX + OUT MIX - OUT Vcc 4.9V Vcc 4.9V 48 N.C. 49 DET DET 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 Mix 31 47k 47k N.C. N.C. Vcc 4.9V MIX IN2 MIX IN1 GND GND GND N.C.
SUBTRACT
F1 AMP OUT
50
F2 AMP OUT
51
30
N.C.
F2 AMP IN
52
AMP
AMP 25dB
29
N.C.
F1 AMP IN
53
28
BF OUT2
F1 BPF OUT
54 BF BF
27
BF OUT1
F2 BPF OUT
55
26
BF IN
F2 adj
56
697.5kHz BPF
25
GND
BH7273KV
F1 adj 57 465.0kHz BPF 24 TVF2AMP OUT
GCA OUT
58
AMP
23
TVF2AMP - IN
GND
59
22
TVF2AMP + IN
Vcc 4.9V
60
21
Vcc 4.9V
GAIN adj
61 VCA
14 / 24dB
20
GND
GAIN SW
62 VCA AMP AMP
19
TVF1AMP OUT
ATF IN
63
1.5MHz LPF
18
TVF1AMP - IN
GND
64
CTRL 1 SLEEP CTRL 2 Vcc 4.9V 3 BIAS FILTER 4 BF2 IN 5 BF2 OUT 6 APF1AMP + IN 7 APF1AMP - IN 8 APF1AMP OUT 9 DRIVER IN 10 DRIVER OUT 11 GND 12 TVF1VCA + IN 13 TVF1CTRL 14 TVF1VCA OUT 15 Vcc 4.9V 16 GND
17
TVF1AMP + IN
*Vcc-GND pin table
Pin No. 2 11 15 16 21 20 25 33 34 44 39 48 47 60 59 64 Pin name VCC 4.9V GND VCC 4.9V GND VCC 4.9V GND GND VCC 4.9V GND VCC 4.9V GND VCC 4.9V GND VCC 4.9V GND GND All pass filter for pins 3 to 10 Same as above 12-14pin VCA, 17-19pin AMP Same as above 22-24pin AMP, 26-28pin BUFF 22-24pin AMP 26-28pin BUFF 35-38pin MIX AMP 35-38pin MIX AMP Detector, subtractor circuit Same as above BPF, 25dBAMP Same as above LPF, GCA Same as above N.C. (Connected to GND to lower impedance) Function
Make sure that Vcc and GND do not sway. Separate the equalizer and ATF grounds. Since the gain of the ATF circuit is high, make sure that there is no return from the output to input. 2
Video ICs
BH7273KV
*Electrical characteristics (unless otherwise noted, Ta = 25C, VCC = 4.9V, f = 4.0MHz)
Parameter Quiescent current Quiescent current [Equalizer block] All pass filter Voltage gain Frequency characteristics VCA Voltage gain Voltage gain Frequency characteristics TVF AMP Voltage gain Frequency characteristics BUFF AMP Voltage gain Frequency characteristics MIX AMP Voltage gain Frequency characteristics [ATF block] VCA voltage gain 1 VCA voltage gain 2 465.0kHz BPF voltage gain 697.5kHz BPF voltage gain ATF OUT output level 1 ATF OUT output level 2 ATF OUT output level 3 [Logic block] SLEEP hold voltage SLEEP hold voltage VCA gain switch low VCA gain switch high VTH1H VTH1L VTH62L VTH62H 2.0 0.0 0.0 2.0 -- -- -- -- 4.9 1.0 1.0 4.9 V V V V Pin 1 voltage for SLEEP mode Pin 1 voltage for SLEEP mode Pin 62 voltage for ATF VCA gain to be low Pin 62 voltage for ATF VCA gain to be high GVF1 GVF2 GVB1 GVB2 VATF1 VATF2 VATF3 11 21 44 44 1.30 1.50 0.60 14 24 48 48 1.50 1.80 0.90 17 27 52 52 1.70 2.10 1.20 dB dB dB dB V V V Input at pin 63 = 2.0mVP-P, pin 62 = low Measure output at pin 58, f = 697.5kHz Input at pin 63 = 2.0mVP-P, pin 62 = high Measure output at pin 58, f = 697.5kHz Input at pin 63 = 0.3mVP-P, pin 62 = high Measure output at pin 50, f = 465.0kHz Input at pin 63 = 0.3mVP-P, pin 62 = high Measure output at pin 51, f = 697.5kHz No signal 50pin = 100mVP-P 51pin = 300mVP-P, 41pin = 1.5V 50pin = 500mVP-P 51pin = 100mVP-P, 41pin = 1.5V GVM GVM 5.0 - 3.0 8.0 0.0 11.0 -- dB dB Input at pins 35 and 36 = 150mVP-P Measure output at pins 37 and 38 f = 8.0 / 1.0MHz, VIN = 150mVP-P Output level difference for pins 37 and 38 GVB GVB - 4.2 - 3.0 - 1.2 0.0 -- -- dB dB Input at pin 26 = 300mVP-P Measure output at pins 27 and 28 f = 8.0 / 1.0MHz, VIN = 300mVP-P Output level difference for pins 27 and 28 GVT GVT 3.9 - 3.0 6.9 0.0 9.9 -- dB dB Input at pins 17, 18, 22, and 23 = 150mVP-P Measure output at pins 19 and 24 f = 8.0 / 1.0MHz, VIN = 150mVP-P Output level difference for pins 19 and 24 GVV1 GVV2 GVV - 1.0 -- - 3.0 2.0 - 28.0 0.0 -- - 12.0 -- dB dB dB Input at pin 12 = 150mVP-P, pin 13 = 3.0V Measure output at pin 14 Input at pin 12 = 150mVP-P, pin 13 = 0.25V Measure output at pin 14 f = 8.0 / 1.0MHz, VIN = 150mVP-P Output level difference for pin 14; pin 13 = 3.0V GVA GVA - 3.0 - 3.0 0.0 0.0 + 3.0 -- dB dB Input at pin 4 = 300mVP-P Measure output at pin 10 f = 8.0 / 1.0MHz, VIN = 300mVP-P Output level difference for pin 10 Symbol Iq Iq(S) Min. -- -- Typ. 63 16 Max. 100 30 Unit mA mA No signal No signal, sleep mode Conditions
3
Video ICs
BH7273KV
Offset BIAS
MIX OUT
ATF OUT
Vcc 4.9V
MIX OUT
*Measurement circuit
Vcc 4.9V 1000p 1000p 2.2k 48 49 DET DET 465.0kHz BPF OUT 697.5kHz BPF OUT 47 46 45 44 43 42
MIX IN
MIX IN
Vcc 4.9V 0.1 0.1 0.1 41 40 39 38 37 36 0.1 35 34 33 32 MIX 31 47k 47k
SUBTRACT
50
51
30
52
AMP
AMP 25dB
29 300 28 0.1 300 BUFF OUT BUFF OUT
0.1
53
54 0.1 f2 adj 56 f1 adj 57 465.0kHz BPF 697.5kHz BPF BF BF
27
0.1 BUFF IN
55
26
0.1
25
BH7273KV
24 0.1 600
TVF AMP OUT
ATF VCA OUT
58
AMP
23
0.1 0.1 Vcc 4.9V
TVF AMP IN
59 Vcc 4.9V 60 Gain adj 61 Gain SW 62 ATF IN 63 0.1 64 CTRL 1 2 3 0.1 SLEEP Vcc 4.9V 470 0.1 APF IN 300 APF OUT 0.1 VCA IN VCA OUT 47p 1k 33p 4 5 6 7 8 9 0.1 600 Vcc 4.9V 10 11 12 13 14 15 16 1.5MHz LPF AMP VCA AMP VCA 14 / 24dB
22
TVF AMP IN
21
20 TVF AMP OUT 19 0.1 600 TVF AMP IN TVF AMP IN
18
0.1
17
0.1
Fig. 1
4
Video ICs
BH7273KV
*Input / output circuits
Pin No. Pin name Pin voltage
1
Internal circuit
Function
15k
35k
1
SLEEP CTRL
0.0
100k
15k
Sleep control
2
VCC 5V
--
--
VCC for all pass filter of pins 3 to10
21k
3
BIAS FILTER
2.2
3
20k
Filter for BF amplifier bias of pins 4 and 5
22k
4 5
BF2 IN BF2 OUT
3.0 2.2
4
5k
5
Buffer amplifier input Buffer amplifier output
6 7
APF1 AMP + IN APF1 AMP - IN
-- --
6
7
APF amplifier positive input APF amplifier negative input
150
8
APF1 AMP OUT
--
8
APF amplifier output
9 10
DRIVER IN DRIVER OUT
-- --
9 10
Driver input Driver output
5
Video ICs
BH7273KV
Pin No.
Pin name
Pin voltage
Internal circuit
Function
11
GND
--
--
GND for all pass filter of pins 3 to 10
12
12
TVF1 VCA + IN
2.2
1k 5k
TVF1 VCA positive input
13
5k 15k
13
TVF1 CTRL
0.0
TVF1 VCA gain control
5k 400 400
14
TVF1 VCA OUT
1.7
14
TVF1 VCA positive output
15
VCC 5V
--
--
VCC for VCA of pins 12 to 14 and for amplifier of pins 17 to 19
16
GND
--
--
GND for VCA of pins 12 to 14 and for amplifier of pins 17 to 19
17
18
17 18
TVF1 AMP + IN TVF1 AMP - IN
2.2 2.2
400 5k 5k
TVF1 amplifier positive input TVF1 amplifier negative input
6
Video ICs
BH7273KV
Pin No.
Pin name
Pin voltage
Internal circuit
Function
19
TVF1 AMP OUT
2.7
19
TVF1 amplifier output
20
GND
--
--
GND for amplifier of pins 22 to 24
21
VCC 5V
--
--
VCC for amplifier of pins 22 to 24 and for BF of pins 26 to 28
22
23
22 23
TVF2 AMP + IN TVF2 AMP - IN
2.2 2.2
400 5k 5k
TVF2 amplifier positive input TVF2 amplifier negative input
24
TVF2 AMP OUT
2.7
24
TVF2 amplifier output
25
GND
--
--
GND for BF of pins 26 to 28
26 27 28
BF IN BF OUT1 BF OUT2
2.1 1.3 1.3
26
5k
27 28
BF input BF output 1 BF output 2
7
Video ICs
BH7273KV
Pin No.
Pin name
Pin voltage
Internal circuit
Function
29 30 31 32
N.C.
--
--
--
33
VCC 5V
--
--
VCC for VCA of pins 30 to 32 and MIX amplifier of pins 35 to 38
34
GND
--
--
GND for MIX amplifier of pins 35 to 38
35 36
MIX IN1 MIX IN2
2.2 2.2
35
36
5k
5k
MIX amplifier input 1 MIX amplifier input 2
37 38
MIX - OUT MIX + OUT
3.2 3.2
37
--
38
MIX amplifier output 1 MIX amplifier output 2
39
GND
--
--
GND for detector, subtractor, and reverse polarity circuits
40
N.C.
--
--
--
8
Video ICs
BH7273KV
Pin No.
Pin name
Pin voltage
Internal circuit
Function
35k
14k
41
OFFSET BIAS
1.5
41
Bias adjustment
15k 4k
42
OFFSET BIAS OUT
2.5
42
Bias output
1k
43
SUBTRACT OUT
--
43
ATF output
1k
44
VCC 5V
--
--
VCC for detector, subtractor, and reverse polarity circuits
15k
15k
46
45 46
F1DET OUT F2DET OUT
-- --
45
F1 detector F2 detector
47k
47k
47
GND
--
--
GND for BPF and 25dB amplifier
48
VCC 5V
--
--
VCC for BPF and 25dB amplifier
9
Video ICs
BH7273KV
Pin No.
Pin name
Pin voltage
Internal circuit
Function
49
N.C.
--
--
--
50 51
F1AMP - OUT F2AMP - OUT
2.1 2.1
50
51
F1 amplifier output F2 amplifier output
52
53
52 53
F2AMP IN F1AMP IN
2.3 2.3
200 5k 5k
200
F2 amplifier input F1 amplifier input
54 55
F1BPF OUT F2BPF OUT
2.5 2.5
54
55
F1 BPF output F2 BPF output
56
F2 ADJ
1.5
56
70k
35k
F2 adjustment
30k
57
F1 ADJ
1.5
57
70k
35k
F1 adjustment
30k
58
GCA OUT
1.8
58
VCA output
10
Video ICs
BH7273KV
Pin No.
Pin name
Pin voltage
Internal circuit
Function
59
GND
--
--
GND for LPF and VCA
60
VCC 5V
--
--
VCC for LPF and VCA
61
GAIN ADJ
1.5
70k
61
35k
VCA gain adjustment
30k 1k 1k
62
15k
35k
62
GAIN SW
0.0
15k 100k
VCA gain switching
63
63
LPF IN
3.8
5k
LPF input
64
N.C.
--
--
N.C. pin Connect to ground to lower impedance
11
Video ICs
BH7273KV
*Application example
Delay Line 150 EQ + OUT Offset BIAS EQ - OUT 150 180 Vcc 4.9V 1000p 1000p ATF OUT Vcc 4.9V 150 Vcc 4.9V 2.2k 48 49 DET DET 47 46 45 44 43 42 41 40 0.1 0.1 0.1 39 38 37 36 0.1 35 34 33 32 MIX 31 47k 47k
SUBTRACT
50
51
30
52
AMP
AMP 25dB
29
0.1
53
28 0.1 27 0.1 BF BF
54 0.1 f2 adj 56 f1 adj 57 465.0kHz BPF 697.5kHz BPF
55
26 0.1 25
BH7273KV
24
58
AMP
23 0.1
59 Vcc 4.9V 60 Gain adj 61 Gain SW 62 ATF IN 63 0.1 64 CTRL 1 2 3 0.1 SLEEP Vcc 4.9V 470 0.1 EQ IN 300 300 300 47p 1k 33p Vcc 4.9V 0.1 0.1 Delay Line 4 5 6 7 8 9 10 11 12 13 14 15 16 1.5MHz LPF AMP VCA AMP VCA 14 / 24dB
22 Delay Line 300 0.1 21 Vcc 4.9V 20 0.1 19 300 18 0.1 17 0.1
Fig. 2
12
Video ICs
BH7273KV
*External dimensions (Units: mm)
12.0 0.3 10.0 0.2 48 12.0 0.3 10.0 0.2 49 33 32
64 1 16
17
1.4 0.1
0.125 0.1
0.10
0.5
0.2 0.1 0.1
VQFP64
0.5
13

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