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EL5134, EL5135, EL5234, EL5235
Data Sheet March 9, 2006 FN7383.3
650MHz, Gain of 5, Low Noise Amplifiers
The EL5134, EL5135, EL5234, and EL5235 are ultra-low voltage noise, high speed voltage feedback amplifiers that are ideal for applications requiring low voltage noise, including communications and imaging. These devices offer extremely low power consumption for exceptional noise performance. Stable at gains as low as 5, these devices offer 100mA of drive performance. Not only do these devices find perfect application in high gain applications, they maintain their performance down to lower gain settings. These amplifiers are available in small package options (SOT-23) as well as the MSOP and the industry-standard SO packages. All parts are specified for operation over the -40C to +85C temperature range.
Features
* 650MHz -3dB bandwidth * Av=+5 stable * Ultra low noise 1.5nV/Hz and 0.9pA/Hz * 450V/s slew rate * Low supply current = 6.7mA per amplifier * Single supplies from 5V to 12V * Dual supplies from 2.5V to 5V * Fast disable on the EL5134 and EL5234 * Duals EL5234 and EL5235 * Low cost * Pb-free plus anneal available (RoHS compliant)
Applications
* Imaging * Instrumentation * Communications devices
Ordering Information
PART NUMBER EL5134IS EL5134IS-T7 EL5134IS-T13 EL5134ISZ (See Note) EL5134ISZ-T7 (See Note) EL5134ISZ-T13 (See Note) EL5135IW-T7 EL5135IW-T7A EL5135IWZ-T7 (See Note) EL5135IWZ-T7A (See Note) EL5234IY EL5234IY-T7 EL5234IY-T13 EL5235IS EL5235IS-T7 EL5235IS-T13 PART MARKING 5134IS 5134IS 5134IS 5134ISZ 5134ISZ 5134ISZ BDAA BDAA BTAA BTAA BWAAA BWAAA BWAAA 5235IS 5235IS 5235IS TAPE & REEL 7" 13" 7" 13" 7" (3K pcs) 7" (250 pcs) 7" (3K pcs) 7" (250 pcs) 7" 13" 7" 13" 8 Ld SO 8 Ld SO 8 Ld SO 8 Ld SO (Pb-Free) 8 Ld SO (Pb-Free) 8 Ld SO (Pb-Free) 5 Ld SOT-23 5 Ld SOT-23 5 Ld SOT-23 (Pb-Free) 5 Ld SOT-23 (Pb-Free) 10 Ld MSOP 10 Ld MSOP 10 Ld MSOP 8 Ld SO 8 Ld SO 8 Ld SO PACKAGE PKG. DWG. # MDP0027 MDP0027 MDP0027 MDP0027 MDP0027 MDP0027 MDP0038 MDP0038 MDP0038 MDP0038 MDP0043 MDP0043 MDP0043 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 (c) Intersil Americas Inc. 2003-2006. All Rights Reserved. All other trademarks mentioned are the property of their respective owners.
EL5134, EL5135, EL5234, EL5235 Pinouts
EL5134 (8 LD SO) TOP VIEW
NC 1 IN- 2 IN+ 3 VS- 4 + 8 CE 7 VS+ 6 OUT 5 NC OUT 1 VS- 2 IN+ 3 +4 IN-
EL5135 (5 LD SOT-23) TOP VIEW
5 VS+
EL5234 (10 LD MSOP) TOP VIEW
INA+ 1 CEA 2 VS- 3 CEB 4 INB+ 5 + + 10 INA9 OUTA 8 VS+ 7 OUTB 6 INBOUTA 1 INA- 2 INA+ 3 VS- 4
EL5235 (8 LD SO) TOP VIEW
8 VS+ + + 7 OUTB 6 INB5 INB+
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FN7383.3 March 9, 2006
EL5134, EL5135, EL5234, EL5235
Absolute Maximum Ratings (TA = 25C)
Supply Voltage from VS+ to VS- . . . . . . . . . . . . . . . . . . . . . . . 13.2V SR, Supply Rate of Supply Voltage Slew Rate . . . . . . . . . . . . 1V/s IIN-, IIN+, CE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mA Continuous Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . 100mA Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Curves Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . .-65C to +125C Operating Temperature . . . . . . . . . . . . . . . . . . . . . . .-40C to +85C Operating Junction Temperature . . . . . . . . . . . . . . . . . . . . . . +125C
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 VOS Offset Voltage
VS+ = +5V, VS- = -5V, Av=+5, RF = 100, RG = 25, RL = 500,TA = 25C, unless otherwise specified. CONDITIONS MIN -1 EL5234 TYP 0.2 0.3 -0.8 2.5 -0.7 3.7 0.3 -3 75 80 3 5 85 108 3.3 16 1 5.6 RL = 1k to GND RL = 1k, RF = 900, RG = 100 RL = 150, RF = 900, RG = 100 4.0 3.5 3.3 70 6.7 8.0 3.9 3.65 140 650 40 1500 RL = 1k, CL = 6pF VS = +5V, RL = 150, VOUT = 0V to 3V 0.1VSTEP 0.1VSTEP 0.1VSTEP 350 55 475 1.75 1.75 25 14 AV = 5, RF = 1k AV = 5, RF = 1k f = 10kHz f = 10kHz 0.12 0.08 1.5 0.9 7.8 5.5 0.7 MAX 1 1.5 UNIT mV mV V/C A nA nA/C dB dB V M pF mA kV/V V V mA MHz MHz MHz V/s ns ns % ns % nV/Hz pA/Hz
DESCRIPTION
TCVOS IB IOS TCIOS PSRR CMRR CMIR RIN CIN IS AVOL VO
Offset Voltage Temperature Coefficient Input Bias Current Input Offset Current Input Bias Current Temperature Coefficient Power Supply Rejection Ratio Common Mode Rejection Ratio Common Mode Input Range Input Resistance Input Capacitance Supply Current, per amplifier Open Loop Gain Voltage Swing
Measured from TMIN to TMAX VIN = 0V VIN = 0V Measured from TMIN to TMAX VS+ = 4.75V to 5.25V VCM = 3V Guaranteed by CMRR test Common mode
ISC BW-3dB BW-0.1dB GBWP PM SR tR tF OS tS dG dP eN iN
Short Circuit Current -3dB Bandwidth 0.1dB Bandwidth Gain Bandwidth Product Phase Margin Slew Rate Rise Time Fall Time Overshoot 0.01% Settling Time Differential Gain Differential Phase Input Noise Voltage Input Noise Current
RL = 10 AV = 5, RL = 1k AV = 5, RL = 1k
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FN7383.3 March 9, 2006
EL5134, EL5135, EL5234, EL5235
Electrical Specifications
PARAMETER SUPPLY (EL5134, EL5234) ISOFF+ ISOFFSupply Current - Disabled, per Amplifier Supply Current - Disabled, per Amplifier No load, VIN = 0V 0 -25 +12 -12 +25 0 A A VS+ = +5V, VS- = -5V, Av=+5, RF = 100, RG = 25, RL = 500,TA = 25C, unless otherwise specified. CONDITIONS MIN TYP MAX UNIT
DESCRIPTION
ENABLE (EL5134, EL5234) IIHCE IILCE VIHCE VILCE CE Pin Input High Current CE Pin Input Low Current CE Input High Voltage for Power-down CE Input Low Voltage for Power-up CE = +5V CE = 0V 1 -1 VS+ - 1 VS+ - 3 10 0 +25 +1 A A V V
Applications Information Typical Performance Curves
5 4 NORMALIZED GAIN (dB) 3 2 1 0 -1 -2 -3 -4 -5 0.1 1 -3dB BW @ 667MHz 10 FREQUENCY (MHz) 100 1K VS = 5V AV = +5 RG = 25 RL = 500 CL = 5pF 240 180 120 PHASE () 60 0 -60 -120 -180 -240 0.1 1 10 FREQUENCY (MHz) 100 1K VS = 5V AV = +5 RG = 25 RL = 500 CL = 5pF
FIGURE 1. GAIN vs FREQUENCY
FIGURE 2. PHASE vs FREQUENCY
0.5 0.4 NORMALIZED GAIN (dB) 0.3 0.2 0.1 0 -0.1 -0.2 -0.3 -0.4 -0.5 1 10 FREQUENCY (MHz) 100 VS = 5V AV = +5 RG = 25 RL = 500 CL = 5pF
70
VS = 5V RL = 500 GAIN = 40dB or 100 FREQUENCY = 15.9MHz GAIN BW PRODUCT = 15.9 x 100 = 1590MHz
60 GAIN (dB) 0.1dB BW @ 40MHz
50
40
30
20
1
10 FREQUENCY (MHz)
100
FIGURE 3. 0.1dB BANDWIDTH
FIGURE 4. GAIN BANDWIDTH PRODUCT
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FN7383.3 March 9, 2006
EL5134, EL5135, EL5234, EL5235 Typical Performance Curves (Continued)
1800 GAIN BANDWIDTH PRODUCT (MHz) VS = 5V RL = 500 NORMALIZED GAIN (dB) 1600
5 4 3 2 1 0 -1 -2 -3 -4 AV = +20 AV = +10 1 10 100 FREQUENCY (MHz) 1K VS = 5V RG = 25 RL = 500 CL = 5pF AV = +5
1400
1200
1000
800 2.0
2.5
3.0 3.5 4.0 4.5 5.0 SUPPLY VOLTAGES (V)
5.5
6.0
-5 0.1
FIGURE 5. GAIN BANDWIDTH PRODUCT vs SUPPLY VOLTAGES
FIGURE 6. GAIN vs FREQUENCY FOR VARIOUS +AV
5 4 NORMALIZED GAIN (dB) 3 2 1 0 -1 -2 -3 -4 -5 0.1 1 VS = 5V VS = 4V VS = 3V VS = 2.5V 10 100 FREQUENCY (MHz) 1K NORMALIZED GAIN (dB) AV = +5V RG = 25 RL = 500 CL = 5pF VS = 6V
5 4 3 2 1 0 -1 -2 -3 -4 -5 0.1 1 RL = 150 RL = 100 RL = 50 10 100 FREQUENCY (MHz) 1K VS = 5V AV = +5 RL = 500 CL = 5pF
RL = 1k RL = 500
FIGURE 7. GAIN vs FREQUENCY FOR VARIOUS VS
FIGURE 8. GAIN vs FREQUENCY FOR VARIOUS RLOAD
5 4 NORMALIZED GAIN (dB) 3 2 1 0 -1 -2 -3 -4 -5 0.1 1 RL = 150 RL = 100 RL = 50 10 100 FREQUENCY (MHz) 1K RL = 1k NORMALIZED GAIN (dB) VS = 5V AV = +10 RG = 25 CL = 10pF
5 4 3 2 1 0 -1 -2 -3 -4 -5 0.1 1 10 100 FREQUENCY (MHz) 1K CL = 4.7pF CL = 0pF RL = 500 VS = 5V AV = +5 RG = 25 RF = 100 RL = 500 CL = 18pF CL = 12pF CL = 8.2pF
FIGURE 9. GAIN vs FREQUENCY FOR VARIOUS RLOAD (AV = +10)
FIGURE 10. GAIN vs FREQUENCY FOR VARIOUS CLOAD (AV = +5)
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FN7383.3 March 9, 2006
EL5134, EL5135, EL5234, EL5235 Typical Performance Curves (Continued)
5 4 NORMALIZED GAIN (dB) 3 2 1 0 -1 -2 -3 -4 -5 0.1 1 10 100 FREQUENCY (MHz) 1K CL = 4.7pF VS = 5V AV = +10 RG = 25 RF = 225 RL = 500 CL = 27pF CL = 12pF CL = 47pF NORMALIZED GAIN (dB) 5 4 3 2 1 0 -1 -2 -3 -4 -5 0.1 1 RF = 50 10 100 FREQUENCY (MHz) 1K RF = 100 VS = 5V AV = +5 RL = 500 CL = 5pF RF = 200 RF = 160 RF = 400
FIGURE 11. GAIN vs FREQUENCY FOR VARIOUS CLOAD (AV = +10)
FIGURE 12. GAIN vs FREQUENCY FOR VARIOUS RF (AV = +5)
5 4 NORMALIZED GAIN (dB) 3 2 1 0 -1 -2 -3 -4 -5 0.1 1 RF = 100 10 100 FREQUENCY (MHz) 1K RF = 225 NORMALIZED GAIN (dB) VS = 5V AV = +10 RL = 500 CL = 10pF RF = 4.53k RF = 2.74k RF = 909
5 4 3 2 1 0 -1 -2 -3 -4 -5 0.1 1 10 100 FREQUENCY (MHz) 1K CIN = 2.7pF CIN = 0pF VS = 5V AV = +5 RG = 25 RL = 500 CL = 5pF CIN = 8.2pF CIN = 4.7pF
FIGURE 13. GAIN vs FREQUENCY FOR VARIOUS RF (AV = +10)
FIGURE 14. GAIN vs FREQUENCY FOR VARIOUS CIN(-) (AV = +5)
5 4 NORMALIZED GAIN (dB) 3 2 1 0 -1 -2 -3 -4 -5 0.1 1 CIN = 0pF 10 100 FREQUENCY (MHz) 1K CIN = 10pF VS = 5V AV = +20 RG = 25 RL = 500 CL = 10pF CIN = 20pF CIN = 15pF OPEN LOOP GAIN (dB)
90 80 70 60 50 40 30 20 10 0 -10 0.001 0.01 0.1 1 10 FREQUENCY (MHz) 100 OPEN LOOP PHASE VS = 5V OPEN LOOP GAIN
200 180 160 140 120 100 80 60 40 20 0 1K PHASE ()
FIGURE 15. GAIN vs FREQUENCY FOR VARIOUS CIN(-) (AV = +10)
FIGURE 16. OPEN LOOP GAIN and PHASE vs FREQUENCY
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FN7383.3 March 9, 2006
EL5134, EL5135, EL5234, EL5235 Typical Performance Curves (Continued)
-10 VS = 5V OUTPUT IMPEDNACE () -30 10 CMRR (dB) -50
100
1
-70
0.1
-90
0.0 0.01
0.1
1 FREQUENCY (MHz)
10
100
-110 1K
10K
100K
1M
10M
100M 500M
FREQUENCY (Hz)
FIGURE 17. OUTPUT IMPEDANCE vs FREQUENCY
FIGURE 18. CMRR vs FREQUENCY
AV=+10 VS=5V VS+ VS-
MAX OUTPUT VOLTAGE SWING (VP-P)
10
10 9 8 7 6 5 4 3 2 1 0 0.1
-10 PSRR (dB)
VS = 5V AV = +5 RG = 25 CL = 5pF
RLOAD = 1k
-30
-50 VSVS+ -90 1K 10K 100K 1M 10M 100M 500M
RLOAD = 150
-70
1.0
FREQUENCY (Hz)
10 100 FREQUENCY (MHz)
1K
FIGURE 19. PSRR vs FREQUENCY
FIGURE 20. MAX OUTPUT VOLTAGE SWING vs FREQUENCY
20 15 10 GROUP DELAY (ns) 5 0 -5 -10 -15 -20 -25 -30 -35 -40 0.1 1 10 100 FREQUENCY (MHz) 1K VS = 5V AV = +5 RG = 25 RL = 500
-40 -50 -60 ISOLATION (dB) -70 -80 -90 -100 -110 -120 -130 -140 0.1
VS = 5V AV = +5 RG = 25 CHIP DISABLED INPUT TO OUTPUT OUTPUT TO INPUT
1.0
10 100 FREQUENCY (MHz)
1K
FIGURE 21. GROUP DELAY vs FREQUENCY
FIGURE 22. INPUT AND OUTPUT ISOLATION (EL5134, EL5234)
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FN7383.3 March 9, 2006
EL5134, EL5135, EL5234, EL5235 Typical Performance Curves (Continued)
-30 HARMONIC DISTORTION (dBc) -40 -50 -60 -70 -80 -90 -100 0.1
2nd H.D
THD (dBc)
VS = 5V AV = =5 RG = 25 RL = 500 CL = 5pF VOUT = 2VP-P
-20 -30 T.H.D -40 -50 -60 -70 -80 -90 Fin = 1MHz 0 1 2 3 4 5 6 7 8 VS = 5V AV = +5 RG = 25 RL = 500 CL = 5pF Fin = 10MHz
3rd H.D
1.0 10 FUNDAMENTAL FREQUENCY (MHz)
100
-100
OUTPUT VOLTAGES (VP-P)
FIGURE 23. HARMONIC DISTORTION vs FREQUENCY
FIGURE 24. TOTAL HARMONIC DISTORTION vs OUTPUT VOLTAGES
6 5 AMPLITUDE (V) 4 3 2 1 0 -1 -2 -3 -200 -100 0 OUTPUT SIGNAL ENABLE SIGNAL
AMPLITUDE (V)
VS = 5V AV = +5 RG = 25 RL = 500 VOUT = 4VP-P
6 5 4 3 2 1 0 -1 -2
VS = 5V AV = +5 RG = 25 RL = 500 VOUT = 4VP-P
DISABLE SIGNAL
100 200 300 400 500 600 700 800 TIME (ns)
-3 -500 -400 -300 -200 -100
OUTPUT SIGNAL 0 100 200 300 400
TIME (ns)
FIGURE 25. TURN-ON TIME (EL5134, EL5234)
FIGURE 26. TURN-OFF TIME (EL5134, EL5234)
100 VS = 5V CURRENT NOISE (pA/Hz) VOLTAGE NOISE (nV/Hz)
100 VS = 5V
10
10
1
1
0.1 0.01
0.10
1.0 10 FREQUENCY (kHz)
100
1K
0.1 0.01
0.10
1.0 10 FREQUENCY (kHz)
100
1K
FIGURE 27. EQUIVALENT INPUT VOLTAGE NOISE vs FREQUENCY
FIGURE 28. EQUIVALENT INPUT CURRENT NOISE vs FREQUENCY
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FN7383.3 March 9, 2006
EL5134, EL5135, EL5234, EL5235 Typical Performance Curves (Continued)
0.6 0.4 AMPLITUDE (V)
2
1
AMPLITUDE (V)
0.2 0.0 -0.2 -0.4 -0.6 -20 TRISE = 1.75ns TFALL = 1.75 ns VS = 5V AV = +5 RG = 25 RL = 500 CL = 5pF VOUT = 500mV
0 TRISE = 2.4ns 1
TFALL = 2.4ns VS = 5V AV = +5 RG = 25 RL = 500 CL = 5pF VOUT = 2.0V
0
20
40
60 80 100 120 140 160 TIME (ns)
-2 -20
0
20
40
60 80 100 120 140 160 TIME (ns)
FIGURE 29. SMALL SIGNAL STEP RESPONSE_RISE AND FALL TIME
FIGURE 30. LARGE SIGNAL STEP RESPONSE_RISE AND FALL TIME
7.0 SUPPLY CURRENT (mA) AV = +5 RG = 25 RL = 500 CL = 5pF
700 AV = +5 RG = 25 RL = 500 CL = 5pF VOUT = 4VP-P
6.8
600 SLEW RATE (V/s)
6.6
500
6.4
400 POSITIVE SLEW RATE 300 NEGATIVE SLEW RATE 200 2.0 2.5 3.0 3.5 4.0 4.5 5.0 SUPPLY VOLTAGES (V) 5.5 6.0
6.2
Please note that the curve showed positive current. The negative current was almost the same.
6.0 2.5
3.0
3.5 4.0 4.5 5.0 SUPPLY VOLTAGES (V)
5.5
6.0
FIGURE 31. SUPPLY CURRENT vs SUPPLY VOLTAGE
FIGURE 32. SLEW RATE vs SUPPLY VOLTAGES
10 0 -10 AMPLITUDE (dBm) -20 -30 -40 -50
50 VS = 5V AV = +10 RF = 226 RL = 100 CL = 10pF @ 0.95MHz f1 = 4.3dBm 2f2-f1 = -66.3dBm @ 1.15MHz
Delta IM = (4.3) - (-69.4) = 73.7dB IP3 = 4.3 + (73.7/2) = 41dBm
45 40 35 IP3 (dBm) 30 25 20 15 10 5
f2 = 4.3dBm @ 1.05MHz
VS = 5V AV = +10 RF = 226 RL = 100 CL = 10pF
2f1-f2 = -69.4dBm -60 @ 0.85MHz -70 -80 -90 -100 0.8 0.9 1.0
1.1
1.2
0
1
10 FREQUENCY (MHz)
100
FREQUENCY (MHz)
FIGURE 33. THIRD ORDER IMD INTERCEPT (IP3)
FIGURE 34. THIRD ORDER IMD INTERCEPT vs FREQUENCY
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FN7383.3 March 9, 2006
EL5134, EL5135, EL5234, EL5235 Typical Performance Curves (Continued)
JEDEC JESD51-7 HIGH EFFECTIVE THERMAL CONDUCTIVITY TEST BOARD JEDEC JESD51-3 LOW EFFECTIVE THERMAL CONDUCTIVITY TEST BOARD
1.4 POWER DISSIPATION (W) 1.2 1 0.8 0.6 0.4 0.2 0
1 0.9 POWER DISSIPATION (W) 0.8
909mW 870mW 435mW SOT23-5/6 JA=230C/W 0 25 50 SO8 JA=110C/W MSOP8/10 JA=115C/W
0.7 625mW 0.6 486mW 0.5 0.4 0.3 0.2 0.1 0 391mW SOT23-5/6 JA=265C/W 0 25 50
SO8 JA=160C/W MSOP8/10 JA=206C/W
75 85 100
125
150
75 85 100
125
150
AMBIENT TEMPERATURE (C)
AMBIENT TEMPERATURE (C)
FIGURE 35. PACKAGE POWER DISSIPATION vs AMBIENT TEMPERATURE
FIGURE 36. PACKAGE POWER DISSIPATION vs AMBIENT TEMPERATURE
DIFFERENTIAL GAIN (%)
0.15 0.10 0.05 0 -0.05 -0.10 -0.15 0 10 20 30 40 IRE 50 60 70 80 90 100
FIGURE 37. DIFFERENTIAL GAIN (%)
DIFFERENTIAL PHASE ()
0.15 0.10 0.05 0 -0.05 -0.10 -0.15 -0.20 0 10 20 30 40 IRE 50 60 70 80 90 100
FIGURE 38. DIFFERENTIAL PHASE ()
Product Description
The EL5134, EL5135, EL5234 and EL5235 are voltage feedback operational amplifiers designed for communication and imaging applications requiring very low voltage and current noise. They also feature low distortion while drawing moderately low supply current and is built on Intersil's proprietary high-speed complementary bipolar process. The EL5134, EL5135, EL5234 and EL5235 use a classical voltage-feedback topology which allows them to be used in a variety of applications where current-feedback amplifiers are 10
not appropriate because of restrictions placed upon the feedback element used with the amplifier.
Gain-Bandwidth Product and the -3dB Bandwidth
The EL5134, EL5135, EL5234 and EL5235 have a gainbandwidth product of 1500MHz while using only 6.7mA of supply current per amplifier. For gains greater than 5 their closed-loop -3dB bandwidth is approximately equal to the gain-bandwidth product divided by the noise gain of the circuit. For gains of 5, higher-order poles in the amplifiers'
FN7383.3 March 9, 2006
EL5134, EL5135, EL5234, EL5235
transfer function contribute to even higher closed loop bandwidths. For example, the EL5134, EL5135, EL5234 and EL5235 have a -3dB bandwidth of 650MHz at a gain of 5, dropping to 150MHz at a gain of 10. It is important to note that the EL5134, EL5135, EL5234 and EL5235 is designed so that this "extra" bandwidth in low-gain application does not come at the expense of stability. As seen in the typical performance curves, the EL5134, EL5135, EL5234 and EL5235 in a gain of only 5 exhibited 0.2dB of peaking with a 500 load. 2.5V to 6V. With single-supply, the EL5134, EL5135, EL5234 and EL5235 will operate from 5V to 12V. To prevent internal circuit latch-up, the slew rate between the negative and positve supplies must be less than 1V/nS. As supply voltages continue to decrease, it becomes necessary to provide input and output voltage ranges that can get as close as possible to the supply voltages. The EL5134, EL5135, EL5234 and EL5235 have an input range which extends to within 2V of either supply. So, for example, on 5V supplies, the EL5134, EL5135, EL5234 and EL5235 have an input range which spans 3V. The output range of the EL5134, EL5135, EL5234 and EL5235 is also quite large, extending to within 2V of the supply rail. On a 5V supply, the output is therefore capable of swinging from -3.1V to +3.1V. Single-supply output range is larger because of the increased negative swing due to the external pulldown resistor to ground.
Output Drive Capability
The EL5134, EL5135, EL5234 and EL5235 are designed to drive a low impedance load. They can easily drive 6VP-P signal into a 500 load. This high output drive capability makes the EL5134, EL5135, EL5234 and EL5235 and ideal choice for RF, IF, and video applications. Furthermore, the EL5134, EL5135, EL5234 and EL5235 are current-limited at their outputs, allowing them to withstand momentary short to ground. However, the power dissipation with output-shorted cannot exceed the power dissipation capability of the package.
Power Dissipation
With the wide power supply range and large output drive capability of the EL5134, EL5135, EL5234 and EL5235, 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 EL5134, EL5135, EL5234 and EL5235 to remain in the safe operating area. These parameters are related as follows:
T JMAX = T MAX + ( JA xPD MAXTOTAL )
Driving Cables and Capacitive Loads
Although the EL5134, EL5135, EL5234 and EL5235 are designed to drive low impedance load, capacitive loads will decreases the amplifiers' phase margin. As shown in the performance curves, capacitive load can result in peaking, overshoot and possible oscillation. For optimum AC performance, capacitive loads should be reduced as much as possible or isolated with a series resistor between 5 to 20. When driving coaxial cables, double termination is always recommended for reflection-free performance. When properly terminated, the capacitance of the coaxial cable will not add to the capacitive load seen by the amplifier.
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*V S x I SMAX + ( V S - V OUTMAX ) x --------------------------R
L
Disable/Power-Down
The EL5134 and EL5234 amplifiers can be disabled placing their outputs in a high impedance state. When disable, each amplifier current is reduced to 12uA. The EL5134 and EL5234 are disabled when their CE pins are pulled up to within 1V of the power suply. Similarly, the amplifiers are enabled by floating or pulling its CE pin to at least 3V below the positive supply. For +/-5V supply, this means that EL5134 and EL5234 amplifiers will be enabled when CE is 2V or less, and disabled when CE is above 4V. Although the logic levels are not stardard TTL, this choice of logic voltages allows the EL5134 and EL5234 to be enabled by typing CE to ground, even in 5V single supply applications. The CE pin can be driveing from CMOS outputs.
where: * TMAX = Maximum ambient temperature * JA = Thermal resistance of the package * PDMAX = Maximum power dissipation of 1 amplifier * VS = Supply voltage * IMAX = Maximum supply current of 1 amplifier * VOUTMAX = Maximum output voltage swing of the application * RL = Load resistance
Supply Voltage Range and Single-Supply Operation
The EL5134, EL5135, EL5234 and EL5235 have been designed to operate with supply voltages having a span of greater than 5V and less than 12V. In practical terms, this means that they will operate on dual supplies ranging from 11
Power Supply Bypassing And Printed Circuit Board Layout
As with any high frequency devices, good printed circuit board layout is essential for optimum performance. Ground
FN7383.3 March 9, 2006
EL5134, EL5135, EL5234, EL5235
plane construction is highly recommended. Pin lengths should be kept as short as possible. The power supply pins must be closely bypassed to reduce the risk of oscillation. The combination of a 4.7F tantalum capacitor in parallel with 0.1F ceramic capacitor has been proven to work well when placed at each supply pin. For single supply operation, where pin 4 (VS-) is connected to the ground plane, a single 4.7F tantalum capacitor in parallel with a 0.1F ceramic capacitor across pin 8 (VS+). For good AC performance, parasitic capacitance should be kept to a minimum. Ground plane construction again should be used. Small chip resistors are recommended to minimize series inductance. Use of sockets should be avoided since they add parasitic inductance and capacitance which will result in additional peaking and overshoot.
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 12
FN7383.3 March 9, 2006

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