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LMV791 17 MHz, Low Noise, CMOS Input, 1.8V Operational Amplifier
September 2005
LMV791 17 MHz, Low Noise, CMOS Input, 1.8V Operational Amplifier
General Description
The LMV791 low noise, CMOS input operational amplifier while offers a low input voltage noise density of 5.8 nV/ consuming only 1.15 mA of quiescent current. The LMV791 is a unity gain stable op amp and has a gain bandwidth of 17 MHz. The LMV791 has a supply voltage range of 1.8V to www.DataSheet4U.com 5.5V and can operate from a single supply. The LMV791 features a rail-to-rail output stage capable of driving a 600Ω load and sourcing as much as 60 mA of current. The LMV791 provides optimal performance in low voltage and low noise systems. A CMOS input stage, with typical input bias currents in the range of a few femtoAmperes, and an input common mode voltage range which includes ground make the LMV791 ideal for low power sensor applications. The LMV791 has a built-in enable feature which can be used to optimize power dissipation in low power applications. The LMV791 is manufactured using National’s advanced VIP50 process and is available in a 6-pin TSOT23 package.
Features
(Typical 5V supply, unless otherwise noted) n Input referred voltage noise 5.8 nV/ n Input bias current 0.1 pA n Unity gain bandwidth 17 MHz n Supply current 1.15 mA n Guaranteed 2.5V and 5.0V performance n Rail-to-rail output swing — @ 10 kΩ load 25 mV from rail 35 mV from rail — @ 2 kΩ load n Total harmonic distortion 0.01% @1 kHz, 600Ω n Temperature range −40oC to 125oC
Applications
n n n n n Photodiode Amplifiers Active filters and buffers Low noise signal processing Medical Instrumentation Sensor interface applications
Typical Application
20116869
Photodiode Transimpedance Amplifier
20116839
Input Referred Voltage Noise vs. Frequency
© 2005 National Semiconductor Corporation
DS201168
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LMV791
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. ESD Tolerance (Note 2) Human Body Machine Model VIN Differential Supply Voltage (V+ – V−) Input/Output Pin Voltage Storage Temperature Range Junction Temperature (Note 3)
Soldering Information Infrared or Convection (20 sec) Wave Soldering Lead Temp (10 sec) 235˚C 260˚C
± 2000V ± 200V
0.3V 6.0V V+ +0.3V, V− −0.3V −65˚C to 150˚C +150˚C
Operating Ratings (Note 1)
Temperature Range (Note 3) Supply Voltage (V – V ) −40˚C ≤ TA ≤ 125˚C 0˚C ≤ TA ≤ 125˚C Package Thermal Resistance (θJA (Note 3)) 6-Pin TSOT23 170˚C/W
+ −
−40˚C to 125˚C 2V to 5.5V 1.8V to 5.5V
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2.5V Electrical Characteristics
Unless otherwise specified, all limits are guaranteed for TA = 25˚C, V+ = 2.5V, V− = 0V, VCM = V+/2, VEN = V+. Boldface limits apply at the temperature extremes. Symbol Parameter Input Offset Voltage Input Offset Average Drift Input Bias Current Input Offset Current Common Mode Rejection Ratio Power Supply Rejection Ratio Input Common-Mode Voltage Range Large Signal Voltage Gain (Note 6) VCM = 1.0V (Notes 7, 8) (Note 8) 0V ≤ VCM ≤ 1.4V 2V ≤ V+ ≤ 5.5V, VCM = 0V 1.8V ≤ V+ ≤ 5.5V, VCM = 0V 80 75 80 75 80 −0.3 -0.3 85 80 88 84 75 82 65 71 98 110 25 20 30 15 35 28 7 5 47 15 0.95 0.02 1.30 1.65 1 5 mA 75 78 65 67 mV from rail dB Conditions Min (Note 5) Typ (Note 4) 0.1 1.0 0.05 10 94 100 dB 98 1.5 1.5 V 0.5 50 Max (Note 5) Units
VOS TC VOS IB IOS CMRR PSRR
± 1.35 ± 1.65
mV µV/˚C pA fA dB
CMVR AVOL
CMRR ≥ 60 dB CMRR ≥ 55 dB VOUT = 0.15V to 2.2V, RLOAD = 2 kΩ to V+/2 VOUT = 0.15V to 2.2V, RLOAD = 10 kΩ to V+/2
VOUT
Output Swing High
RLOAD = 2 kΩ to V+/2 RLOAD = 10 kΩ to V+/2
Output Swing Low
RLOAD = 2 kΩ to V /2
+
RLOAD = 10 kΩ to V+/2 IOUT Output Short Circuit Current Sourcing to V− VIN = 200 mV (Note 9) Sinking to V+ VIN = –200 mV (Note 9) IS Supply Current per Amplifier Enable Mode VEN > 2.1 Shutdown Mode VEN < 0.4
mA µA
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2
LMV791
2.5V Electrical Characteristics
SR GBWP en in ton toff VEN IEN Slew Rate Gain Bandwidth Product Input-Referred Voltage Noise Input-Referred Current Noise Turn-on Time Turn-off Time Enable Pin Voltage Range Enable Pin Input Current f = 1 kHz f = 1 kHz
(Continued) 8.5 10.5 14 6.2 0.01 140 1000 V/µs MHz nV/ pA/ ns ns V 3 0.1 µA %
AV = +1, Rising (10% to 90%) AV = +1, Falling (90% to 10%)
Enable Mode Shutdown Mode Enable Mode VEN > 2.1V (Note 7) Shutdown Mode VEN < 0.4V (Note 7) f = 1 kHz, AV = 1, RLOAD = 600Ω
2.1 to 2.5 0 to 0.4
2 to 2.5 0 to 0.5 1.5 0.003 0.01
THD+N Total Harmonic Distortion + www.DataSheet4U.comNoise
5V Electrical Characteristics
Unless otherwise specified, all limits guaranteed for TA = 25˚C, V+ = 5V, V− = 0V, VCM = V+/2, VEN = V+. Boldface limits apply at the temperature extremes. Symbol VOS TC VOS IB IOS CMRR PSRR Parameter Input Offset Voltage Input Offset Average Drift Input Bias Current Input Offset Current Common Mode Rejection Ratio Power Supply Rejection Ratio Input Common-Mod.