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EL2227
Data Sheet May 1, 2007 FN7058.3
Dual Very Low Noise Amplifier
The EL2227 is a dual, low-noise amplifier, ideally suited to line receiving applications in ADSL and HDSLII designs. With low noise specification of just 1.9nV/Hz and 1.2pA/Hz, the EL2227 is perfect for the detection of very low amplitude signals. The EL2227 features a -3dB bandwidth of 115MHz and is gain-of-2 stable. The EL2227 also affords minimal power dissipation with a supply current of just 4.8mA per amplifier. The amplifier can be powered from supplies ranging from 2.5V to 12V. The EL2227 is available in a space-saving 8 Ld MSOP package as well as the industry-standard 8 Ld SOIC. It can operate over the -40C to +85C temperature range.
Features
* Voltage noise of only 1.9nV/Hz * Current noise of only 1.2pA/Hz * Bandwidth (-3dB) of 115MHz @AV = +2 * Gain-of-2 stable * Just 4.8mA per amplifier * 8 Ld MSOP package * 2.5V to 12V operation * Pb-free plus anneal available (RoHS compliant)
Applications
* ADSL receivers * HDSLII receivers
Pinout
EL2227 (8 LD SOIC, 8 LD MSOP) TOP VIEW
* Ultrasound input amplifiers * Wideband instrumentation * Communications equipment
VOUTA VINAVINA+ VS-
1 2 3 4 + +
8 7 6 5
VS+ VOUTB VINBVINB+
* AGC and PLL active filters * Wideband sensors
Ordering Information
PART NUMBER EL2227CY EL2227CY-T13 EL2227CY-T7 EL2227CYZ (Note) EL2227CYZ-T13 (Note) EL2227CYZ-T7 (Note) EL2227CS EL2227CS-T13 EL2227CS-T7 EL2227CSZ (Note) EL2227CSZ-T13 (Note) EL2227CSZ-T7 (Note) L L L BASAA BASAA BASAA 2227CS 2227CS 2227CS 2227CSZ 2227CSZ 2227CSZ PART MARKING TEMP RANGE (C) -40 to +85 -40 to +85 -40 to +85 -40 to +85 -40 to +85 -40 to +85 -40 to +85 -40 to +85 -40 to +85 -40 to +85 -40 to +85 -40 to +85
.
TAPE AND REEL 13" 7" 13" 7" 13" 7" 13" 7"
PACKAGE 8 Ld MSOP (3.0mm) 8 Ld MSOP (3.0mm) 8 Ld MSOP (3.0mm) 8 Ld MSOP (3.0mm) (Pb-free) 8 Ld MSOP (3.0mm) (Pb-free) 8 Ld MSOP (3.0mm) (Pb-free) 8 Ld SOIC (150 mil) 8 Ld SOIC (150 mil) 8 Ld SOIC (150 mil) 8 Ld SOIC (150 mil) (Pb-free) 8 Ld SOIC (150 mil) (Pb-free) 8 Ld SOIC (150 mil) (Pb-free)
PKG. DWG.# MDP0043 MDP0043 MDP0043 MDP0043 MDP0043 MDP0043 MDP0027 MDP0027 MDP0027 MDP0027 MDP0027 MDP0027
NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2004, 2005, 2007. All Rights Reserved All other trademarks mentioned are the property of their respective owners.
EL2227
Absolute Maximum Ratings
Supply Voltage between VS+ and VS- . . . . . . . . . . . . . . . . . . . . .28V Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . VS- - 0.3V, VS +0.3V Maximum Continuous Output Current . . . . . . . . . . . . . . . . . . . 40mA Maximum Die Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . +150C ESD Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2kV
Thermal Information
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . .-65C to +150C Operating Temperature . . . . . . . . . . . . . . . . . . . . . . .-40C to +85C Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Curves Pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . . .see link below http://www.intersil.com/pbfree/Pb-FreeReflow.asp
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typical values are for information purposes only. Unless otherwise noted, all tests are at the specified temperature and are pulsed tests, therefore: TJ = TC = TA
Electrical Specifications
PARAMETER INPUT CHARACTERISTICS VOS TCVOS IB RIN CIN CMIR CMRR AVOL eN iN
VS+ = +12V, VS- = -12V, RL = 500 and CL = 3pF to 0V, RF = RG = 620, and TA = +25C Unless Otherwise Specified. DESCRIPTION CONDITION MIN TYP MAX UNIT
Input Offset Voltage Average Offset Voltage Drift Input Bias Current Input Impedance Input Capacitance Common-Mode Input Range Common-Mode Rejection Ratio Open-Loop Gain Voltage Noise Current Noise
VCM = 0V
-0.2 -0.6
3
mV V/C A M pF
VCM = 0V
-9
-3.4 7.3 1.6
-11.8 for VIN from -11.8V to 10.4V -5V VOUT 5V f = 100kHz f = 100kHz 60 70 94 87 1.9 1.2
+10.4
V dB dB nV/Hz pA/Hz
OUTPUT CHARACTERISTICS VOL Output Swing Low RL = 500 RL = 250 VOH Output Swing High RL = 500 RL = 250 ISC Short Circuit Current RL = 10 10 9.5 140 -10.4 -9.8 10.4 10 180 -10 -9 V V V V mA
POWER SUPPLY PERFORMANCE PSRR IS VS Power Supply Rejection Ratio Supply Current (Per Amplifier) Operating Range VS is moved from 2.25V to 12V No Load 2.5 65 95 4.8 6.5 12 dB mA V
DYNAMIC PERFORMANCE SR tS BW HD2 Slew Rate (Note 2) Settling to 0.1% (AV = +2) -3dB Bandwidth 2nd Harmonic Distortion 2.5V square wave, measured 25% to 75% (AV = +2), VO = 1V RF = 358 f = 1MHz, VO = 2VP-P, RL = 500, RF = 358 f = 1MHz, VO = 2VP-P, RL = 150, RF = 358 HD3 3rd Harmonic Distortion f = 1MHz, VO = 2VP-P, RL = 500, RF = 358 f = 1MHz, VO = 2VP-P, RL = 150, RF = 358 40 50 65 115 93 83 94 76 V/S ns MHz dBc dBc dBc dBc
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FN7058.3 May 1, 2007
EL2227
Electrical Specifications
PARAMETER INPUT CHARACTERISTICS VOS TCVOS IB RIN CIN CMIR CMRR AVOL eN iN Input Offset Voltage Average Offset Voltage Drift Input Bias Current Input Impedance Input Capacitance Common-Mode Input Range Common-Mode Rejection Ratio Open-Loop Gain Voltage Noise Current Noise for VIN from -4.8V to 3.4V -5V VOUT 5V f = 100kHz f = 100kHz -4.8 60 70 97 84 1.9 1.2 VCM = 0V -9 VCM = 0V 0.2 -0.6 -3.7 7.3 1.6 3.4 3 mV V/C A M pF V dB dB nV/Hz pA/Hz VS+ = +12V, VS- = -12V, RL = 500 and CL = 3pF to 0V, RF = RG = 620, and TA = +25C Unless Otherwise Specified. DESCRIPTION CONDITION MIN TYP MAX UNIT
OUTPUT CHARACTERISTICS VOL Output Swing Low RL = 500 RL = 250 VOH Output Swing High RL = 500 RL = 250 ISC Short Circuit Current RL = 10 3.5 3.5 60 -3.8 -3.7 3.7 3.6 100 -3.5 -3.5 V V V V mA
POWER SUPPLY PERFORMANCE PSRR IS VS Power Supply Rejection Ratio Supply Current (Per Amplifier) Operating Range VS is moved from 2.25V to 12V No Load 2.5 65 95 4.5 5.5 12 dB mA V
DYNAMIC PERFORMANCE SR tS BW HD2 Slew Rate Settling to 0.1% (AV = +2) -3dB Bandwidth 2nd Harmonic Distortion 2.5V square wave, measured 25%-75% (AV = +2), VO = 1V RF = 358 f = 1MHz, VO = 2VP-P, RL = 500, RF = 358 f = 1MHz, VO = 2VP-P, RL = 150, RF = 358 HD3 3rd Harmonic Distortion f = 1MHz, VO = 2VP-P, RL = 500, RF = 358 f = 1MHz, VO = 2VP-P, RL = 150, RF = 358 35 45 77 90 98 90 94 79 V/S ns MHz dBc dBc dBc dBc
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FN7058.3 May 1, 2007
EL2227 Typical Performance Curves
4 3 NORMALIZED GAIN (dB) NORMALIZED GAIN (dB) 2 1 0 -1 -2 -3 -4 -5 -6 1M VS = 12V AV = +2 RL = 500 10M FREQUENCY (Hz) 100M 200M RF = 100 RF = 350 RF = 1k RF = 620 4 3 2 1 0 -1 -2 -3 -4 -5 -6 1M VS = 12V AV = -1 RL = 500 10M FREQUENCY (Hz) RF = 420 RF = 620 RF = 1k RF = 100 RF = 350
100M 200M
FIGURE 1. NON-INVERTING FREQUENCY RESPONSE FOR VARIOUS RF
FIGURE 2. INVERTING FREQUENCY RESPONSE FOR VARIOUS RF
4 3 NORMALIZED GAIN (dB) NORMALIZED GAIN (dB) 2 1 0 -1 -2 -3 -4 -5 -6 1M VS = 12V RF = 350 RL = 500 10M FREQUENCY (Hz) 100M 200M AV = 10 AV = 5 AV = 2
4 3 2 1 0 -1 -2 -3 -4 -5 -6 1M VS = 12V RF = 420 RL = 500 10M FREQUENCY (Hz) 100M 200M AV = -5 AV = -10 AV = -2 AV = -1
FIGURE 3. NON-INVERTING FREQUENCY RESPONSE (GAIN)
FIGURE 4. INVERTING FREQUENCY RESPONSE (GAIN)
135 90 45 0 PHASE () -45 -90 -135 -180 -225 -270 -315 1M VS = 12 RF = 350 RL = 500 10M FREQUENCY (Hz) 100M 200M AV = 10 AV = 5 AV = 2 PHASE ()
135 90 45 0 -45 -90 -135 -180 -225 -270 -315 1M VS = 12V RF = 420 RL = 500 10M FREQUENCY (Hz) 100M 200M AV = -1 AV = -10 AV = -5 AV = -2
FIGURE 5. NON-INVERTING FREQUENCY RESPONSE (PHASE)
FIGURE 6. INVERTING FREQUENCY RESPONSE (PHASE)
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FN7058.3 May 1, 2007
EL2227 Typical Performance Curves (Continued)
4 3 NORMALIZED GAIN (dB) 2 1 0 -1 -2 -3 -4 -5 -6 100k VIN = 1VPP VIN = 2VPP 1M 10M 100M VIN = 500mVPP VS = 12V RF = 350 AV = +2 RL = 500 4 3 VIN = 100mVPP VIN = 20mVPP NORMALIZED GAIN (dB) 2 1 0 -1 -2 -3 -4 -5 -6 1M VS 12V RF = 420 RL = 500 AV = -1 10M FREQUENCY (Hz) 100M 200M VIN = 2.8VPP VIN = 280mVPP VIN = 1.4VPP VIN = 20mVPP
FREQUENCY (Hz)
FIGURE 7. NON-INVERTING FREQUENCY RESPONSE FOR VARIOUS INPUT SIGNAL LEVELS
FIGURE 8. INVERTING FREQUENCY RESPONSE FOR VARIOUS INPUT SIGNAL LEVELS
5 4 NORMALIZED GAIN (dB) 3 2 1 0 -1 -2 -3 -4 -5 1M VS=12 VS = 12V V F = 620 R RF=620 RL = 500 V = +2 A 10M FREQUENCY (Hz) 100M 200M CL = 2pF CL = 30pF CL = 12pF NORMALIZED GAIN (dB)
4 3 2 1 0 -1 -2 -3 -4 -5 -6 1M VS 12V R F= 420 RL = 500 AV = -1 10M FREQUENCY (Hz) 100M 200M CL = 2pF CL = 12pF CL = 30pF
FIGURE 9. NON-INVERTING FREQUENCY RESPONSE FOR VARIOUS CL
FIGURE 10. INVERTING FREQUENCY RESPONSE FOR VARIOUS CL
4 3 NORMALIZED GAIN (dB) NorMalized GAIN (dB) 2 1 0 -1 -2 -3 -4 -5 -6 1M VS = 12V RF = 620 CL = 15pF AV = +2 10M FREQUENCY (Hz) 100M 200M RL = 50 RL = 100 RL = 500
4 3 2 1 0 -1 -2 -3 -4 -5 VS = 12V RF = 620 RL = 500 AV = +2 1M
VO = +10V VO = -10V VO = +5V
VO = 0V VO = -5V
-6 100k
10M
100M
FREQUENCY (Hz)
FIGURE 11. NON-INVERTING FREQUENCY RESPONSE FOR VARIOUS RL
FIGURE 12. FREQUENCY RESPONSE FOR VARIOUS OUTPUT DC LEVELS
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FN7058.3 May 1, 2007
EL2227 Typical Performance Curves (Continued)
140 120 3dB BANDWIDTH (MHz) 100 80 60 40 A = +5 V 20 0 AV = -10 2 4 6 8 10 12 SUPPLY VOLTAGE (V) AV = -5 AV = +2 A V= -2 AV = +10 AV = +2 RF = 620 RL = 500 4 AV = -1 PEAKING (dB) 3.5 3 2.5 2 1.5 1 0.5 0 2 4 6 AV = +10 AV = -10 AV = +5 AV = -5 AV = -1 AV = +2 AV = +2 RF = 620 RL = 500
AV = -2
8
10
12
SUPPLY VOLTAGE (V)
FIGURE 13. 3dB BANDWIDTH vs SUPPLY VOLTAGE
FIGURE 14. PEAKING vs SUPPLY VOLTAGE
RF = 620 AV = 2 RL = 500
RF = 620 AV = 2 RL = 500
0.5V/DIV
0.5V/DIV
100ns/DIV
100ns/DIV
FIGURE 15. LARGE SIGNAL STEP RESPONSE (VS = 12V)
FIGURE 16. LARGE SIGNAL STEP RESPONSE (VS = 2.5V)
RF = 620 AV = 2 RL = 500
RF = 620 AV = 2 RL = 500
20mV/DIV
20mV/DIV
100ns/DIV
100ns/DIV
FIGURE 17. SMALL SIGNAL STEP RESPONSE (VS = 12V)
FIGURE 18. SMALL SIGNAL STEP RESPONSE (VS = 2.5V)
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FN7058.3 May 1, 2007
EL2227 Typical Performance Curves (Continued)
10 8 6 GROUP DELAY (ns) 4 2 0 -2 -4 -6 -8 -10 1M 10M FREQUENCY (Hz) VS = 12V RF = 620 RL = 500 PIN = -20dBm into 50 100M AV = 2V AV = 5V dG (%) OR dP () 0.08 0.06 0.04 0.02 0 -0.02 -1 dP AV = 2 RF = 620 RL = 150 fO = 3.58MHz 0.1
dG -0.5 0 0.5 1
DC INPUT VOLTAGE (V)
FIGURE 19. GROUP DELAY vs FREQUENCY
FIGURE 20. DIFFERENTIAL GAIN/PHASE vs DC INPUT VOLTAGE AT 3.58MHz
12 OUTPUT IMPEDANCE ()
100
SUPPLY CURRENT (mA)
1.2/DIV
10
6
1
0.1
0
1.2/DIV 0 6 SUPPLY VOLTAGE (V) 12
0.01 10k
100k
1M FREQUENCY (Hz)
10M
100M
FIGURE 21. SUPPLY CURRENT vs SUPPLY VOLTAGE
FIGURE 22. CLOSED LOOP OUTPUT IMPEDANCE vs FREQUENCY
110 90 -CMRR (dB) 70 50 30 VS = 12 10 10 100 1k 10k 100k 1M 10M 100M PSRR (dB)
0 20 40 60 80 100 1k VSVS+
10k
100k
1M
10M
100M
FREQUENCY (Hz)
FREQUENCY (Hz)
FIGURE 23. CMRR
FIGURE 24. PSRR
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FN7058.3 May 1, 2007
EL2227 Typical Performance Curves (Continued)
-40 -50 DISTORTION (dBc) -60 -70 -80 -90 -100 3rd H AV = 2 RF = 620 RL = 500 2nd H DISTORTION (dBc) -50 -60 -70 -80 -90 -100 3rd H AV = 2 RF = 358 RL = 500
2nd H
0
4
8
12
16
20
0
0.5
1
1.5
2
2.5
OUTPUT SWING (VPP)
OUTPUT SWING (VPP)
FIGURE 25. 1MHz 2nd and 3rd HARMONIC DISTORTION vs OUTPUT SWING FOR VS = 12V
FIGURE 26. 1MHz 2nd and 3rd HARMONIC DISTORTION vs OUTPUT SWING FOR VS = 2.5V
-60 -70 -80 THD (dBc) -90 -100 -110 -120 RL = 500 RL = 50
-60 -70 -80 THD (dBc) -90 -100 -110 -120 1 10 100 1000 FREQUENCY (kHz) RL = 500
RL = 50
1
10
100
1000
FREQUENCY (kHz)
FIGURE 27. TOTAL HARMONIC DISTORTION vs FREQUENCY @ 2VPP VS = 12V
FIGURE 28. TOTAL HARMONIC DISTORTION vs FREQUENCY @ 2VPP VS = 2.5V
VOLTAGE NOISE (nV/Hz), CURRENT NOISE (pA/Hz)
10 9 8 7 6 5 4 3 2 1 10 100 1k FREQUENCY (Hz) 10k 100k EN IN GAIN (dB)
0 -20 AB -40 -60 -80 -100 100k BA
1M
10M
100M
FREQUENCY (Hz)
FIGURE 29. VOLTAGE AND CURRENT NOISE vs FREQUENCY
FIGURE 30. CHANNEL TO CHANNEL ISOLATION vs FREQUENCY
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FN7058.3 May 1, 2007
EL2227 Typical Performance Curves (Continued)
150 140 -3dB BANDWIDTH (MHz) 130 IS (mA) 9 -20 0 20 40 60 80 100 120 140 8.5 -50 120 110 100 90 80 -40 9.5 10
0
50
100
150
DIE TEMPERATURE (C)
DIE TEMPERATURE (C)
FIGURE 31. -3dB BANDWIDTH vs TEMPERATURE
FIGURE 32. SUPPLY CURRENT vs TEMPERATURE
2
-2
-3 VOS (mV) IBIAS (A) 0
-4
-2 -5
-4 -50
0
50
100
150
-6 -50
0
50
100
150
DIE TEMPERATURE (C)
DIE TEMPERATURE (C)
FIGURE 33. VOS vs TEMPERATURE
FIGURE 34. INPUT BIAS CURRENT vs TEMPERATURE
55 53 SETTLING TIME (ns) SLEW RATE (V/s) 51 49 47 45 -50
160 140 120 100 80 60 40 20 0 50 100 150 0 0.01 VS = 12V VO = 2VPP 0.1 ACCURACY (%) 1 VS = 2.5V VO = 2VPP VS = 12V VO = 5VPP
DIE TEMPERATURE (C)
FIGURE 35. SLEW RATE vs TEMPERATURE
FIGURE 36. SETTLING TIME vs ACCURACY
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FN7058.3 May 1, 2007
EL2227 Typical Performance Curves (Continued)
0.9 0.8 POWER DISSIPATION (W) 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 0 25 50 75 85 100 125 150
J
JEDEC JESD51-3 LOW EFFECTIVE THERMAL CONDUCTIVITY TEST BOARD
781mW 607mW
JA =
A=
MS OP 8 +2 06 C /W
SO 8 +1 60 C /W
AMBIENT TEMPERATURE (C)
FIGURE 37. PACKAGE POWER DISSIPATION vs AMBIENT TEMPERATURE
Pin Descriptions
EL2227CY 8-PIN MSOP 1 EL2227CS 8-PIN SO 1 PIN NAME VOUTA PIN FUNCTION Output EQUIVALENT CIRCUIT
VS+
VOUT
Circuit 1 2 2 VINAInput
VS+
VIN+
VIN-
VS-
Circuit 2 3 4 5 6 7 8 3 4 5 6 7 8 VINA+ VSVINB+ VINBVOUTB VS+ Input Supply Input Input Output Supply Reference Circuit 2 Reference Circuit 1 Reference Circuit 2
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FN7058.3 May 1, 2007
EL2227 Applications Information
Product Description
The EL2227 is a dual voltage feedback operational amplifier designed especially for DMT ADSL and other applications requiring very low voltage and current noise. It also features low distortion while drawing moderately low supply current and is built on Elantec's proprietary high-speed complementary bipolar process. The EL2227 use a classical voltage-feedback topology which allows them to be used in a variety of applications where current-feedback amplifiers are not appropriate because of restrictions placed upon the feedback element used with the amplifier. The conventional topology of the EL2227 allows, for example, a capacitor to be placed in the feedback path, making it an excellent choice for applications such as active filters, sample-and-holds, or integrators.
10k 10k 1k + 1F 4.7F +12V 1k 1F
1k 75k
FIGURE 39.
Power Dissipation
With the wide power supply range and large output drive capability of the EL2227, it is possible to exceed the +150C maximum junction temperatures under certain load and power-supply conditions. It is therefore important to calculate the maximum junction temperature (TJMAX) for all applications to determine if power supply voltages, load conditions, or package type need to be modified for the EL2227 to remain in the safe operating area. These parameters are related as follows:
T JMAX = T MAX + ( JA x PD MAXTOTAL ) (EQ. 1)
ADSL CPE Applications
The low noise EL2227 amplifier is specifically designed for the dual differential receiver amplifier function with ADSL transceiver hybrids as well as other low-noise amplifier applications. A typical ADSL CPE line interface circuit is shown in Figure 38. The EL2227 is used in receiving DMT down stream signal. With careful transceiver hybrid design and the EL2227 1.9nV/Hz voltage noise and 1.2pA/Hz current noise performance, -140dBm/Hz system background noise performance can be easily achieved.
DRIVER INPUT RG RF + RF RECEIVE OUT + + + RF R RIN ROUT LINE + ROUT RF ZLINE LINE +
where: PDMAXTOTAL is the sum of the maximum power dissipation of each amplifier in the package (PDMAX) PDMAX for each amplifier can be calculated as follows:
V OUTMAX PD MAX = 2 x V S x I SMAX + ( V S - V OUTMAX ) x --------------------------RL (EQ. 2)
where: TMAX = Maximum Ambient Temperature
RECEIVE AMPLIFIERS
R RIN
RECEIVE OUT -
JA = Thermal Resistance of the Package PDMAX = Maximum Power Dissipation of 1 Amplifier VS = Supply Voltage
FIGURE 38. TYPICAL LINE INTERFACE CONNECTION
Disable Function
The EL2227 is in the standard dual amplifier package without the enable/disable function. A simple way to implement the enable/disable function is depicted below. When disabled, both the positive and negative supply voltages are disconnected (see Figure 39)
IMAX = Maximum Supply Current of 1 Amplifier VOUTMAX = Maximum Output Voltage Swing of the Application RL = Load Resistance To serve as a guide for the user, we can calculate maximum allowable supply voltages for the example of the video cable-driver below since we know that TJMAX = +150C, TMAX = +75C, ISMAX = 9.5mA, and the package JAs are shown in Table 1. If we assume (for this example) that we are driving a back-terminated video cable, then the
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FN7058.3 May 1, 2007
EL2227
maximum average value (over duty-cycle) of VOUTMAX is 1.4V, and RL = 150, giving the results seen in Table 1.
TABLE 1. PART EL2227CS EL2227CY PACKAGE SO8 MSOP8 MAX PDISS @ TMAX
Printed-Circuit Layout
The EL2227 are well behaved, and easy to apply in most applications. However, a few simple techniques will help assure rapid, high quality results. As with any high-frequency device, good PCB layout is necessary for optimum performance. Ground-plane construction is highly recommended, as is good power supply bypassing. A 0.1F ceramic capacitor is recommended for bypassing both supplies. Lead lengths should be as short as possible, and bypass capacitors should be as close to the device pins as possible. For good AC performance, parasitic capacitances should be kept to a minimum at both inputs and at the output. Resistor values should be kept under 5kW because of the RC time constants associated with the parasitic capacitance. Metal-film and carbon resistors are both acceptable, use of wire-wound resistors is not recommended because of their parasitic inductance. Similarly, capacitors should be low-inductance for best performance.
JA
MAX VS
160C/W 0.406W @ +85C 206C/W 0.315W @ +85C
Single-Supply Operation
The EL2227 have been designed to have a wide input and output voltage range. This design also makes the EL2227 an excellent choice for single-supply operation. Using a single positive supply, the lower input voltage range is within 200mV of ground (RL = 500), and the lower output voltage range is within 875mV of ground. Upper input voltage range reaches 3.6V, and output voltage range reaches 3.8V with a 5V supply and RL = 500. This results in a 2.625V output swing on a single 5V supply. This wide output voltage range also allows single-supply operation with a supply voltage as high as 28V.
Gain-Bandwidth Product and the -3dB Bandwidth
The EL2227 have a gain-bandwidth product of 137MHz while using only 5mA of supply current per amplifier. For gains greater than 2, their closed-loop -3dB bandwidth is approximately equal to the gain-bandwidth product divided by the noise gain of the circuit. For gains less than 2, higherorder poles in the amplifiers' transfer function contribute to even higher closed loop bandwidths. For example, the EL2227 have a -3dB bandwidth of 115MHz at a gain of +2, dropping to 28MHz at a gain of +5. It is important to note that the EL2227 have been designed so that this "extra" bandwidth in low-gain applications does not come at the expense of stability. As seen in the typical performance curves, the EL2227 in a gain of +2 only exhibit 0.5dB of peaking with a 1000 load.
Output Drive Capability
The EL2227 have been designed to drive low impedance loads. They can easily drive 6VP-P into a 500 load. This high output drive capability makes the EL2227 an ideal choice for RF, IF and video applications.
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FN7058.3 May 1, 2007
EL2227 Small Outline Package Family (SO)
A D N (N/2)+1 h X 45
A E E1 PIN #1 I.D. MARK c SEE DETAIL "X"
1 B
(N/2) L1
0.010 M C A B e C H A2 GAUGE PLANE A1 0.004 C 0.010 M C A B b DETAIL X
SEATING PLANE L 4 4
0.010
MDP0027
SMALL OUTLINE PACKAGE FAMILY (SO) INCHES SYMBOL A A1 A2 b c D E E1 e L L1 h N NOTES: 1. Plastic or metal protrusions of 0.006" maximum per side are not included. 2. Plastic interlead protrusions of 0.010" maximum per side are not included. 3. Dimensions "D" and "E1" are measured at Datum Plane "H". 4. Dimensioning and tolerancing per ASME Y14.5M-1994 SO-8 0.068 0.006 0.057 0.017 0.009 0.193 0.236 0.154 0.050 0.025 0.041 0.013 8 SO-14 0.068 0.006 0.057 0.017 0.009 0.341 0.236 0.154 0.050 0.025 0.041 0.013 14 SO16 (0.150") 0.068 0.006 0.057 0.017 0.009 0.390 0.236 0.154 0.050 0.025 0.041 0.013 16 SO16 (0.300") (SOL-16) 0.104 0.007 0.092 0.017 0.011 0.406 0.406 0.295 0.050 0.030 0.056 0.020 16 SO20 (SOL-20) 0.104 0.007 0.092 0.017 0.011 0.504 0.406 0.295 0.050 0.030 0.056 0.020 20 SO24 (SOL-24) 0.104 0.007 0.092 0.017 0.011 0.606 0.406 0.295 0.050 0.030 0.056 0.020 24 SO28 (SOL-28) 0.104 0.007 0.092 0.017 0.011 0.704 0.406 0.295 0.050 0.030 0.056 0.020 28 TOLERANCE MAX 0.003 0.002 0.003 0.001 0.004 0.008 0.004 Basic 0.009 Basic Reference Reference NOTES 1, 3 2, 3 Rev. M 2/07
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FN7058.3 May 1, 2007
EL2227 Mini SO Package Family (MSOP)
0.25 M C A B D N A (N/2)+1
MDP0043
MINI SO PACKAGE FAMILY MILLIMETERS SYMBOL A A1 MSOP8 1.10 0.10 0.86 0.33 0.18 3.00 4.90 3.00 0.65 0.55 0.95 8 MSOP10 1.10 0.10 0.86 0.23 0.18 3.00 4.90 3.00 0.50 0.55 0.95 10 TOLERANCE Max. 0.05 0.09 +0.07/-0.08 0.05 0.10 0.15 0.10 Basic 0.15 Basic Reference NOTES 1, 3 2, 3 Rev. D 2/07 NOTES: 1. Plastic or metal protrusions of 0.15mm maximum per side are not included.
E
E1
PIN #1 I.D.
A2 b c
B
1 (N/2)
D E E1
e C SEATING PLANE 0.10 C N LEADS b
H
e L L1 N
0.08 M C A B
L1 A c SEE DETAIL "X"
2. Plastic interlead protrusions of 0.25mm maximum per side are not included. 3. Dimensions "D" and "E1" are measured at Datum Plane "H". 4. Dimensioning and tolerancing per ASME Y14.5M-1994.
A2 GAUGE PLANE L DETAIL X
0.25
A1
3 3
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems. Intersil Corporation's quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com 14
FN7058.3 May 1, 2007

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