Features: ` DESIGNED FOR LOW COST
` HIGH GAIN ACCURACY: G = 5, 0.02%, 2ppm/
` GAIN SET WITH EXT. RESISTORS FOR > 5V/V
` LOW OFFSET VOLTAGE: ±250V
` HIGH CMRR: 94dB DC, 50dB at 45kHz
` LOW BIAS CURRENT: 0.5pA
` BANDWIDTH, SLEW RATE: 2.0MHz, 5V/s
` RAIL-TO-RAIL OUTPUT SWING: (V+) 0.02V
` WIDE TEMPERATURE RANGE: 55 to +125
` LOW QUIESCENT CURRENT: 490A max/chan
` SHUT DOWN: 0.01A
` MSOP-8 SINGLE AND TSSOP-14 DUAL PACKAGESApplication· INDUSTRIAL SENSOR AMPLIFIERS: Bridge, RTD, Thermocouple, Position
· PHYSIOLOGICAL AMPLIFIERS: ECG, EEG, EMG
· A/D CONVERTER SIGNAL CONDITIONING
· DIFFERENTIAL LINE RECEIVERS WITH GAIN
· FIELD UTILITY METERS
· PCMCIA CARDS
· AUDIO AMPLIFIERS
· COMMUNICATION SYSTEMS
· TEST EQUIPMENT
· AUTOMOTIVE INSTRUMENTATIONPinout
SpecificationsSupply Voltage, V+ to V .................................................................... 7.5V
Signal Input Terminals, Voltage(2) ................... (V) 0.5V to (V+) + 0.5V
Current(2) ..................................................... 10mA
Output Short-Circuit(3) ............................................................. Continuous
Operating Temperature .................................................... 55 to +125
Storage Temperature ....................................................... 65 to +150
Junction Temperature ........................................................................ 150
Lead Temperature (soldering, 10s) ................................................... 300
NOTES: (1) Stresses above these ratings may cause permanent damage. Exposure to absolute maximum conditions for extended periods may degrade device reliability. (2) Input terminals are diode-clamped to the power-supply rails. Input signals that can swing more than 0.5V beyond the supply rails should be current limited to 10mA or less. (3) Short-circuit to ground, one amplifier per package.
DescriptionThe INA331 and INA2331 are rail-to-rail output, low-power CMOS instrumentation amplifiers that offer wide range, singlesupply operation as well as bipolar-supply operation. The INA331 family provides low-cost, low-noise amplification of differential signals with a low quiescent current of 415A (dropping to 0.01A when shutdown). Returning to normal operation within microseconds, this INA can be used for battery or multi-channel applications.
Configured internally in a gain of 5V/V, the INA331 offers flexibility in higher gains by choosing external resistors.
The INA331 rejects line noise and its harmonics, because common-mode error remains low even at higher frequencies. High bandwidth and slew rate makes the INA331 ideal for directly driving sampling Analog-to-Digital (A/D) converters as well as general-purpose applications.
With high precision, low cost, and small packages, the INA331 outperforms discrete designs.
Additionally, because they are specified for wide temperature range of 55 to +125 and operating range of 65 to +150, they can be used in demanding industrial and automotive environments.
INA331 Data Sheet
