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EL5111, EL5211, EL5411
Data Sheet June 15, 2004 FN7119.2
60MHz Rail-to-Rail Input-Output Op Amps
The EL5111, EL5211, and EL5411 are low power, high voltage rail-to-rail input-output amplifiers. The EL5111 represents a single amplifier, the EL5211 contains two amplifiers, and the EL5411 contains four amplifiers. Operating on supplies ranging from 5V to 15V, while consuming only 2.5mA per amplifier, the EL5111, EL5211, and EL5411 have a bandwidth of 60MHz (-3dB). They also provide common mode input ability beyond the supply rails, as well as rail-to-rail output capability. This enables these amplifiers to offer maximum dynamic range at any supply voltage. The EL5111, EL5211, and EL5411 also feature fast slewing and settling times, as well as a high output drive capability of 65mA (sink and source). These features make these amplifiers ideal for high speed filtering and signal conditioning application. Other applications include battery power, portable devices, and anywhere low power consumption is important. The EL5111 is available in 5-pin TSOT and 8-pin HMSOP packages. The EL5211 is available in 8-pin MSOP and 8-pin HMSOP packages. The EL5411 is available in space-saving 14-pin TSSOP and 14-pin HTSSOP packages. All feature a standard operational amplifier pinout. These amplifiers operate over a temperature range of -40C to +85C.
Features
* 60MHz -3dB bandwidth * Supply voltage = 4.5V to 16.5V * Low supply current (per amplifier) = 2.5mA * High slew rate = 75V/s * Unity-gain stable * Beyond the rails input capability * Rail-to-rail output swing * 180mA output short current
Applications
* TFT-LCD panels * VCOM amplifiers * Drivers for A-to-D converters * Data acquisition * Video processing * Audio processing * Active filters * Test equipment * Battery-powered applications * Portable equipment
Pinouts
EL5111 (8-PIN HMSOP) TOP VIEW
NC 1 VIN- 2 VIN+ 3 VS- 4 + 8 NC 7 VS+ 6 VOUT 5 NC VOUT 1 VS- 2 +VIN+ 3 4 VINVINA+ 3 VS- 4
EL5111 (5-PIN TSOT) TOP VIEW
5 VS+
EL5211 (8-PIN MSOP, HMSOP) TOP VIEW
VOUTA 1 VINA- 2 + + 8 VS+ 7 VOUTB 6 VINB5 VINB+
EL5411 (14-PIN TSSOP, HTSSOP) TOP VIEW
VOUTA 1 VINA- 2 VINA+ 3 VS+ 4 VINB+ 5 VINB- 6 VOUTB 7 + + + + 14 VOUTD 13 VIND12 VIND+ 11 VS10 VINC+ 9 VINC8 VOUTC
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CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright (c) Intersil Americas Inc. 2004. All Rights Reserved. Elantec is a registered trademark of Elantec Semiconductor, Inc. All other trademarks mentioned are the property of their respective owners.
EL5111, EL5211, EL5411
Ordering Information
PART NUMBER EL5111IWT-T7 EL5111IWT-T7A EL5111IWTZ-T7 (Note) EL5111IWTZ-T7A (Note) EL5111IYE EL5111IYE-T7 EL5111IYE-T13 EL5111IYEZ (Note) EL5111IYEZ-T7 (Note) EL5111IYEZ-T13 (Note) EL5211IY EL5211IY-T7 EL5211IY-T13 EL5211IYZ (Note) EL5211IYZ-T7 (Note) EL5211IYZ-T13 (Note) EL5211IYE PACKAGE 5-Pin TSOT 5-Pin TSOT 5-Pin TSOT (Pb-Free) 5-Pin TSOT (Pb-Free) 8-Pin HMSOP 8-Pin HMSOP 8-Pin HMSOP 8-Pin HMSOP (Pb-Free) 8-Pin HMSOP (Pb-Free) 8-Pin HMSOP (Pb-Free) 8-Pin MSOP 8-Pin MSOP 8-Pin MSOP 8-Pin MSOP (Pb-Free) 8-Pin MSOP (Pb-Free) 8-Pin MSOP (Pb-Free) 8-Pin HMSOP TAPE & REEL 7" (3K pcs) 7" (250 pcs) 7" (3K pcs) 7" (250 pcs) 7" 13" 7" 13" 7" 13" 7" 13" PKG. DWG. # MDP0049 MDP0049 MDP0049 MDP0049 MDP0050 MDP0050 MDP0050 MDP0050 MDP0050 MDP0050 MDP0043 MDP0043 MDP0043 MDP0043 MDP0043 MDP0043 MDP0050 PART NUMBER EL5211IYE-T7 EL5211IYE-T13 EL5211IYEZ (Note) EL5211IYEZ-T7 (Note) EL5211IYEZ-T13 (Note) EL5411IR EL5411IR-T7 EL5411IR-T13 EL5411IRZ (Note) EL5411IRZ-T7 (Note) EL5411IRZ-T13 (Note) EL5411IRE EL5411IRE-T7 EL5411IRE-T13 EL5411IREZ (Note) EL5411IREZ-T7 (Note) EL5411IREZ-T13 (Note) PACKAGE 8-Pin HMSOP 8-Pin HMSOP 8-Pin HMSOP (Pb-Free) 8-Pin HMSOP (Pb-Free) 8-Pin HMSOP (Pb-Free) 14-Pin TSSOP 14-Pin TSSOP 14-Pin TSSOP 14-Pin TSSOP (Pb-Free) 14-Pin TSSOP (Pb-Free) 14-Pin TSSOP (Pb-Free) 14-Pin HTSSOP 14-Pin HTSSOP 14-Pin HTSSOP 14-Pin HTSSOP (Pb-Free) 14-Pin HTSSOP (Pb-Free) 14-Pin HTSSOP (Pb-Free) TAPE & REEL 7" 13" 7" 13" 7" 13" 7" 13" 7" 13" 7" 13" PKG. DWG. # MDP0050 MDP0050 MDP0050 MDP0050 MDP0050 MDP0044 MDP0044 MDP0044 MDP0044 MDP0044 MDP0044 MDP0048 MDP0048 MDP0048 MDP0048 MDP0048 MDP0048
NOTE: Intersil Pb-free products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which is 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-020B.
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EL5111, EL5211, EL5411
Absolute Maximum Ratings (TA = 25C)
Supply Voltage between VS+ and VS- . . . . . . . . . . . . . . . . . . . .+18V Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . VS- - 0.5V, VS +0.5V Maximum Continuous Output Current . . . . . . . . . . . . . . . . . . . 65mA Maximum Die Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . +125C Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . -65C to +150C Ambient Operating Temperature . . . . . . . . . . . . . . . . -40C to +85C Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Curves
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. Typ 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
VS+ = +5V, VS- = -5V, RL = 1k to 0V, TA = 25C, Unless Otherwise Specified CONDITIONS MIN TYP MAX UNIT
DESCRIPTION
Input Offset Voltage Average Offset Voltage Drift (Note 1) Input Bias Current Input Impedance Input Capacitance Common-Mode Input Range Common-Mode Rejection Ratio Open-Loop Gain
VCM = 0V
3 7
15
mV V/C
VCM = 0V
2 1 2 -5.5
60
nA G pF
+5.5 70 70
V dB dB
for VIN from -5.5V to 5.5V -4.5V VOUT 4.5V
50 62
OUTPUT CHARACTERISTICS VOL VOH ISC IOUT Output Swing Low Output Swing High Short-Circuit Current Output Current IL = -5mA IL = 5mA 4.85 -4.92 4.92 180 65 -4.85 V V mA mA
POWER SUPPLY PERFORMANCE PSRR IS Power Supply Rejection Ratio Supply Current (Per Amplifier) VS is moved from 2.25V to 7.75V No load 60 80 2.5 3.75 dB mA
DYNAMIC PERFORMANCE SR tS BW GBWP PM CS dG dP NOTES: 1. Measured over operating temperature range. 2. Slew rate is measured on rising and falling edges. 3. NTSC signal generator used. Slew Rate (Note 2) Settling to +0.1% (AV = +1) -3dB Bandwidth Gain-Bandwidth Product Phase Margin Channel Separation Differential Gain (Note 3) Differential Phase (Note 3) f = 5MHz (EL5211 & EL5411 only) RF = RG = 1k and VOUT = 1.4V RF = RG = 1k and VOUT = 1.4V -4.0V VOUT 4.0V, 20% to 80% (AV = +1), VO = 2V step 75 80 60 32 50 110 0.17 0.24 V/s ns MHz MHz dB %
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EL5111, EL5211, EL5411
Electrical Specifications
PARAMETER INPUT CHARACTERISTICS VOS TCVOS IB RIN CIN CMIR CMRR AVOL Input Offset Voltage Average Offset Voltage Drift (Note 4) Input Bias Current Input Impedance Input Capacitance Common-Mode Input Range Common-Mode Rejection Ratio Open-Loop Gain for VIN from -0.5V to 5.5V 0.5V VOUT 4.5V -0.5 45 62 66 70 VCM = 2.5V VCM = 2.5V 3 7 2 1 2 +5.5 60 15 mV V/C nA G pF V dB dB VS+ = +5V, VS- = 0V, RL = 1k to 2.5V, TA = 25C, Unless Otherwise Specified CONDITION MIN TYP MAX UNIT
DESCRIPTION
OUTPUT CHARACTERISTICS VOL VOH ISC IOUT Output Swing Low Output Swing High Short-circuit Current Output Current IL = -5mA IL = 5mA 4.85 80 4.92 180 65 150 mV V mA mA
POWER SUPPLY PERFORMANCE PSRR IS Power Supply Rejection Ratio Supply Current (Per Amplifier) VS is moved from 4.5V to 15.5V No load 60 80 2.5 3.75 dB mA
DYNAMIC PERFORMANCE SR tS BW GBWP PM CS dG dP NOTES: 4. Measured over operating temperature range. 5. Slew rate is measured on rising and falling edges. 6. NTSC signal generator used. Slew Rate (Note 5) Settling to +0.1% (AV = +1) -3dB Bandwidth Gain-Bandwidth Product Phase Margin Channel Separation Differential Gain (Note 6) Differential Phase (Note 6) f = 5MHz (EL5211 & EL5411 only) RF = RG = 1k and VOUT = 1.4V RF = RG = 1k and VOUT = 1.4V 1V VOUT 4V, 20% to 80% (AV = +1), VO = 2V step 75 80 60 32 50 110 0.17 0.24 V/s ns MHz MHz dB %
Electrical Specifications
PARAMETER INPUT CHARACTERISTICS VOS TCVOS IB RIN CIN CMIR
VS+ = +15V, VS- = 0V, RL = 1k to 7.5V, TA = 25C, Unless Otherwise Specified CONDITION MIN TYP MAX UNIT
DESCRIPTION
Input Offset Voltage Average Offset Voltage Drift (Note 7) Input Bias Current Input Impedance Input Capacitance Common-Mode Input Range
VCM = 7.5V
3 7
15
mV V/C
VCM = 7.5V
2 1 2 -0.5
60
nA G pF
+15.5
V
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EL5111, EL5211, EL5411
Electrical Specifications
PARAMETER CMRR AVOL VS+ = +15V, VS- = 0V, RL = 1k to 7.5V, TA = 25C, Unless Otherwise Specified (Continued) CONDITION for VIN from -0.5V to 15.5V 0.5V VOUT 14.5V MIN 53 62 TYP 72 70 MAX UNIT dB dB
DESCRIPTION Common-Mode Rejection Ratio Open-Loop Gain
OUTPUT CHARACTERISTICS VOL VOH ISC IOUT Output Swing Low Output Swing High Short-circuit Current Output Current IL = -5mA IL = 5mA 14.85 80 14.92 180 65 150 mV V mA mA
POWER SUPPLY PERFORMANCE PSRR IS Power Supply Rejection Ratio Supply Current (Per Amplifier) VS is moved from 4.5V to 15.5V No load 60 80 2.5 3.75 dB mA
DYNAMIC PERFORMANCE SR tS BW GBWP PM CS dG dP NOTES: 7. Measured over operating temperature range 8. Slew rate is measured on rising and falling edges 9. NTSC signal generator used Slew Rate (Note 8) Settling to +0.1% (AV = +1) -3dB Bandwidth Gain-Bandwidth Product Phase Margin Channel Separation Differential Gain (Note 9) Differential Phase (Note 9) f = 5MHz (EL5211 & EL5411 only) RF = RG = 1k and VOUT = 1.4V RF = RG = 1k and VOUT = 1.4V 1V VOUT 14V, 20% to 80% (AV = +1), VO = 2V step 75 80 60 32 50 110 0.16 0.22 V/s ns MHz MHz dB %
Typical Performance Curves
500 QUANTITY (AMPLIFIERS) QUANTITY (AMPLIFIERS) VS=5V TA=25C 400 300 200 100 0 -8 -6 -4 -2 -0 2 4 6 8 10 -12 -10 12 TYPICAL PRODUCTION DISTRIBUTION
25 VS=5V 20 15 10 5 0 1 3 5 7 9 11 13 15 17 19 21 TYPICAL PRODUCTION DISTRIBUTION
INPUT OFFSET VOLTAGE (mV)
INPUT OFFSET VOLTAGE DRIFT, TCVOS (V/C)
FIGURE 1. INPUT OFFSET VOLTAGE DISTRIBUTION
FIGURE 2. INPUT OFFSET VOLTAGE DRIFT
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EL5111, EL5211, EL5411 Typical Performance Curves (Continued)
2 INPUT OFFSET VOLTAGE (mV) INPUT BIAS CURRENT (A) 1.5 1 0.5 0 -0.5 -50
0.008 VS=5V 0.004 0 -0.004 -0.008 -0.012 -50
-10
30
70
110
150
-10
30
70
110
150
TEMPERATURE (C)
TEMPERATURE (C)
FIGURE 3. INPUT OFFSET VOLTAGE vs TEMPERATURE
FIGURE 4. INPUT BIAS CURRENT vs TEMPERATURE
4.96 OUTPUT HIGH VOLTAGE (V) OUTPUT LOW VOLTAGE (V) VS=5V IOUT=5mA 4.94 4.92 4.90 4.88
-4.85 VS=5V IOUT=5mA -4.87 -4.89 -4.91 -4.93 -4.95 -50
4.86 -50
-10
30
70
110
150
-10
30
70
110
150
TEMPERATURE (C)
TEMPERATURE (C)
FIGURE 5. OUTPUT HIGH VOLTAGE vs TEMPERATURE
FIGURE 6. OUTPUT LOW VOLTAGE vs TEMPERATURE
75 VS=5V RL=1k OPEN-LOOP GAIN (dB) 70 SLEW RATE (V/s)
78 VS=5V 77 76 75 74 73
65
60 -50
-10
30
70
110
150
72 -50
-10
30
70
110
150
TEMPERATURE (C)
TEMPERATURE (C)
FIGURE 7. OPEN-LOOP GAIN vs TEMPERATURE
FIGURE 8. SLEW RATE vs TEMPERATURE
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EL5111, EL5211, EL5411 Typical Performance Curves (Continued)
2.9 TA=25C SUPPLY CURRENT (mA) SUPPLY CURRENT (mA) 2.7 2.5 2.3 2.1 1.9 1.7 1.5 4 8 12 16 20
2.7 VS=5V 2.65 2.6 2.55 2.5 2.45 2.4 -50
-10
30
70
110
150
SUPPLY VOLTAGE (V)
TEMPERATURE (C)
FIGURE 9. SUPPLY CURRENT PER AMPLIFIER vs SUPPLY VOLTAGE
FIGURE 10. SUPPLY CURRENT PER AMPLIFIER vs TEMPERATURE
0 DIFFERENTIAL PHASE () -0.02 DIFFERENTIAL GAIN (%) -0.04 -0.06 -0.08 -0.1 -0.12 -0.14 -0.16 -0.18 0 100 IRE 200 VS=5V AV=2 RL=1k
0.3 0.25 0.2 0.15 0.1 0.05 0 0 100 IRE 200
FIGURE 11. DIFFERENTIAL GAIN
FIGURE 12. DIFFERENTIAL PHASE
-30 -40 DISTORTION (dB) -50 -60 2nd HD -70 -80 -90 0 2 4 6 8 10 3rd HD VS=5V AV=2 RL=1k FREQ=1MHz GAIN (dB)
80 60 GAIN 40 20 0 -20 1K PHASE
250 190 130 70 10 -50 100M PHASE ()
10K
100K
1M
10M
VOP-P (V)
FREQUENCY (Hz)
FIGURE 13. HARMONIC DISTORTION vs VOP-P
FIGURE 14. OPEN LOOP GAIN AND PHASE
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EL5111, EL5211, EL5411 Typical Performance Curves (Continued)
MAGNITUDE (NORMALIZED) (dB)
3 1 -1 -3
VS=5V AV=1 CLOAD=0pF
MAGNITUDE (NORMALIZED) (dB)
5
25 15 5 -5 -15 VS=5V AV=1 RL=1k 1M 10M 100M 1000pF 100pF 47pF 10pF
1k
560 150
-5 100K
1M
10M
100M
-25 100K
FREQUENCY (Hz)
FREQUENCY (Hz)
FIGURE 15. FREQUENCY RESPONSE FOR VARIOUS RL
FIGURE 16. FREQUENCY RESPONSE FOR VARIOUS CL
400 OUTPUT IMPEDANCE () 350 300 250 200 150 100 50 0 10K 100K 1M FREQUENCY (Hz) 10M 100M MAXIMUM OUTPUT SWING (VP-P)
12 10 8 6 4 2 VS=5V AV=1 RL=1k DISTORTION <1% 100K 1M 10M 100M
0 10K
FREQUENCY (kHz)
FIGURE 17. CLOSED LOOP OUTPUT IMPEDANCE
FIGURE 18. MAXIMUM OUTPUT SWING vs FREQUENCY
-15 -25 CMRR (dB) -35 -45 -55 -65 1K PSRR (dB)
-80 PSRR+ -60 PSRR-
-40
-20 VS=5V TA=25C 10K 100K 1M 10M 100M 0 100 1K 10K 100K 1M 10M
FREQUENCY (Hz)
FREQUENCY (Hz)
FIGURE 19. CMRR
FIGURE 20. PSRR
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EL5111, EL5211, EL5411 Typical Performance Curves (Continued)
1K VOLTAGE NOISE (nV/Hz) -60 DUAL MEASURED CH A TO B QUAD MEASURED CH A TO D OR B TO C OTHER COMBINATIONS YIELD IMPROVED REJECTION
-80 XTALK (dB) 100
-100
-120 VS=5V RL=1k AV=1 VIN=110mVRMS 10K 100K 1M 10M 30M
10
-140 1 100
1K
10K
100K
1M
10M
100M
-160 1K
FREQUENCY (Hz)
FREQUENCY (Hz)
FIGURE 21. INPUT VOLTAGE NOISE SPECTRAL DENSITY
FIGURE 22. CHANNEL SEPARATION
100 VS=5V AV=1 RL=1k VIN=50mV TA=25C
5 4 3 STEP SIZE (V) 2 1 0 -1 -2 -3 -4 -5 55 0.1% VS=5V AV=1 RL=1k
80 OVERSHOOT (%)
0.1%
60
40
20
0 10
100 LOAD CAPACITANCE (pF)
1K
65
75
85
95
105
SETTLING TIME (ns)
FIGURE 23. SMALL-SIGNAL OVERSHOOT vs LOAD CAPACITANCE
FIGURE 24. SETTLING TIME vs STEP SIZE
VS=5V TA=25C AV=1 RL=1k
VS=5V TA=25C AV=1 RL=1k
100mV STEP
1V STEP 50ns/DIV 50ns/DIV
FIGURE 25. LARGE SIGNAL TRANSIENT RESPONSE
FIGURE 26. SMALL SIGNAL TRANSIENT RESPONSE
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EL5111, EL5211, EL5411 Pin Descriptions
EL5111 (TSOT-5) 1 EL5111 (HMSOP8) 6 EL5211 (MSOP8, HMSOP8) 1 EL5411 (TSSOP14, HTSSOP14) 1 NAME VOUTA FUNCTION Amplifier A output EQUIVALENT CIRCUIT
VS+
GND
VS-
CIRCUIT 1 4 2 2 2 VINAAmplifier A inverting input
VS+
VS-
CIRCUIT 2 3 5 3 7 3 8 5 6 7 3 4 5 6 7 8 9 10 2 4 4 11 12 13 14 1, 5, 8 VINA+ VS+ VINB+ VINBVOUTB VOUTC VINCVINC+ VSVIND+ VINDVOUTD NC Amplifier A non-inverting input Positive power supply Amplifier B non-inverting input Amplifier B inverting input Amplifier B output Amplifier C output Amplifier C inverting input Amplifier C non-inverting input Negative power supply Amplifier D non-inverting input Amplifier D inverting input Amplifier D output Not connected (Reference Circuit 2) (Reference Circuit 2) (Reference Circuit 1) (Reference Circuit 2) (Reference Circuit 2) (Reference Circuit 1) (Reference Circuit 1) (Reference Circuit 2) (Reference Circuit 2) (Reference Circuit 2)
Applications Information
Product Description
The EL5111, EL5211, and EL5411 voltage feedback amplifiers are fabricated using a high voltage CMOS process. They exhibit rail-to-rail input and output capability, are unity gain stable and have low power consumption (2.5mA per amplifier). These features make the EL5111, EL5211, and EL5411 ideal for a wide range of generalpurpose applications. Connected in voltage follower mode and driving a load of 1k, the EL5111, EL5211, and EL5411 have a -3dB bandwidth of 60MHz while maintaining a 75V/s slew rate. The EL5111 is a single amplifier, the EL5211 a dual amplifier, and the EL5411 a quad amplifier.
Operating Voltage, Input, and Output
The EL5111, EL5211, and EL5411 are specified with a single nominal supply voltage from 5V to 15V or a split supply with its total range from 5V to 15V. Correct operation is guaranteed for a supply range of 4.5V to 16.5V. Most EL5111, EL5211, and EL5411 specifications are stable over both the full supply range and operating temperatures of -40C to +85C. Parameter variations with operating voltage and/or temperature are shown in the typical performance curves. The input common-mode voltage range of the EL5111, EL5211, and EL5411 extends 500mV beyond the supply rails. The output swings of the EL5111, EL5211, and EL5411 typically extend to within 100mV of positive and negative supply rails with load currents of 5mA. Decreasing load
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EL5111, EL5211, EL5411
currents will extend the output voltage range even closer to the supply rails. Figure 27 shows the input and output waveforms for the device in the unity-gain configuration. Operation is from 5V supply with a 1k load connected to GND. The input is a 10VP-P sinusoid. The output voltage is approximately 9.8VP-P.
VS = 5V, TA = 25C, AV = 1, VIN = 10VP-P 5V 10s
Power Dissipation
With the high-output drive capability of the EL5111, EL5211, and EL5411 amplifiers, it is possible to exceed the 125C 'absolute-maximum junction temperature' under certain load current conditions. Therefore, it is important to calculate the maximum junction temperature for the application to determine if load conditions need to be modified for the amplifier to remain in the safe operating area. The maximum power dissipation allowed in a package is determined according to:
INPUT
T JMAX - T AMAX P DMAX = ------------------------------------------- JA
OUTPUT
where: * TJMAX = Maximum junction temperature * TAMAX = Maximum ambient temperature * JA = Thermal resistance of the package * PDMAX = Maximum power dissipation in the package The maximum power dissipation actually produced by an IC is the total quiescent supply current times the total power supply voltage, plus the power in the IC due to the loads, or:
P DMAX = i [ V S x I SMAX + ( V S + - V OUT i ) x I LOAD i ]
5V
FIGURE 27. OPERATION WITH RAIL-TO-RAIL INPUT AND OUTPUT
Short Circuit Current Limit
The EL5111, EL5211, and EL5411 will limit the short circuit current to 180mA if the output is directly shorted to the positive or the negative supply. If an output is shorted indefinitely, the power dissipation could easily increase such that the device may be damaged. Maximum reliability is maintained if the output continuous current never exceeds 65mA. This limit is set by the design of the internal metal interconnects.
when sourcing, and:
P DMAX = i [ V S x I SMAX + ( V OUT i - V S - ) x I LOAD i ]
Output Phase Reversal
The EL5111, EL5211, and EL5411 are immune to phase reversal as long as the input voltage is limited from VS- -0.5V to VS+ +0.5V. Figure 28 shows a photo of the output of the device with the input voltage driven beyond the supply rails. Although the device's output will not change phase, the input's overvoltage should be avoided. If an input voltage exceeds supply voltage by more than 0.6V, electrostatic protection diodes placed in the input stage of the device begin to conduct and overvoltage damage could occur.
VS = 2.5V, TA = 25C, AV = 1, VIN = 6VP-P 1V 10s
when sinking, where: * i = 1 to 2 for dual and 1 to 4 for quad * VS = Total supply voltage * ISMAX = Maximum supply current per amplifier * VOUTi = Maximum output voltage of the application * ILOADi = Load current If we set the two PDMAX equations equal to each other, we can solve for RLOADi to avoid device overheat. Figures 29, 30, and 31 provide a convenient way to see if the device will overheat. The maximum safe power dissipation can be found graphically, based on the package type and the ambient temperature. By using the previous equation, it is a simple matter to see if PDMAX exceeds the device's power derating curves. To ensure proper operation, it is important to observe the recommended derating curves shown in Figures 29, 30 & 31.
1V
FIGURE 28. OPERATION WITH BEYOND-THE-RAILS INPUT
11
EL5111, EL5211, EL5411
JEDEC JESD51-7 HIGH EFFECTIVE THERMAL CONDUCTIVITY TEST BOARD 1.4 POWER DISSIPATION (W) 1.2 1.0W 1 0.8 0.6 0.4 0.2 0 0 25 50 75 85 100 125 AMBIENT TEMPERATURE (C) MSOP8 JA=115C/W 870mW TSSOP14 JA=100C/W 3.5 POWER DISSIPATION (W) 3 2.5 2 1.5 1 0.5 0 0 25 50 75 85 100 125 AMBIENT TEMPERATURE (C) 2.632W HTSSOP14 JA=38C/W JEDEC JESD51-7 HIGH EFFECTIVE THERMAL CONDUCTIVITY (4-LAYER) TEST BOARD HTSSOP EXPOSED DIEPAD SOLDERED TO PCB PER JESD51-5
FIGURE 29. PACKAGE POWER DISSIPATION vs AMBIENT TEMPERATURE
FIGURE 31. PACKAGE POWER DISSIPATION vs AMBIENT TEMPERATURE
JEDEC JESD51-3 LOW EFFECTIVE THERMAL CONDUCTIVITY TEST BOARD 0.9 POWER DISSIPATION (W) 0.8 694mW 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 0 25 50 75 85 100 125 AMBIENT TEMPERATURE (C) 486mW MSOP8 JA=206C/W 606mW TSSOP14 JA=165C/W HTSSOP14 JA=144C/W
Unused Amplifiers
It is recommended that any unused amplifiers in a dual and a quad package be configured as a unity gain follower. The inverting input should be directly connected to the output and the non-inverting input tied to the ground plane.
Power Supply Bypassing and Printed Circuit Board Layout
The EL5111, EL5211, and EL5411 can provide gain at high frequency. As with any high-frequency device, good printed circuit board layout is necessary for optimum performance. Ground plane construction is highly recommended, lead lengths should be as short as possible and the power supply pins must be well bypassed to reduce the risk of oscillation. For normal single supply operation, where the VS- pin is connected to ground, a 0.1F ceramic capacitor should be placed from VS+ to pin to VS- pin. A 4.7F tantalum capacitor should then be connected in parallel, placed in the region of the amplifier. One 4.7F capacitor may be used for multiple devices. This same capacitor combination should be placed at each supply pin to ground if split supplies are to be used.
FIGURE 30. PACKAGE POWER DISSIPATION vs AMBIENT TEMPERATURE
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

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