INA331AIDGKR

The INA331 and INA2331 are rail-to-rail output, low-power CMOS instrumentation amplifiers that offer wide range, single-supply 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 415μA (dropping to 0.01μA 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. They are specified for a wide temperature range of -55°C to +125°C.

Applications

• 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 INSTRUMENTATION

Key features

• DESIGNED FOR LOW COST
• HIGH GAIN ACCURACY: G = 5, 0.02%, 2ppm/°C
• GAIN SET WITH EXT. RESISTORS FOR >5V/V
• LOW OFFSET VOLTAGE: ±250μV
• HIGH CMRR: 94dB DC, 50dB at 45kHz
• LOW BIAS CURRENT: 0.5pA
• BANDWIDTH, SLEW RATE: 2.0MHz, 5V/μs
• RAIL-TO-RAIL OUTPUT SWING: (V+)-0.02V
• WIDE TEMPERATURE RANGE: -55°C to ±125°C
• LOW QUIESCENT CURRENT: 490μA max/chan
• SHUT DOWN: 0.01μA
• MSOP-8 SINGLE AND TSSOP-14 DUAL PACKAGES