INA332 INA2332

Low-Power, Single-Supply, CMOS INSTRUMENTATION AMPLIFIERS

FEATURES

● DESIGNED FOR LOW COST

● HIGH GAIN ACCURACY: G = 5, 0.07%, 2ppm/°C

● GAIN SET WITH EXT. RESISTORS FOR > 5V/V

● HIGH CMRR: 73dB 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

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

DESCRIPTION

The INA332 and INA2332 are rail-to-rail output, low-power CMOS instrumentation amplifiers that offer wide range, singlesupply, and bipolar-supply operation. Using a special manufacturing flow, the INA332 family provides the lowest cost available, while still achieving low-noise amplification of differential signals with 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 multichannel applications.

Configured internally in a gain of 5V/V, the INA332 offers flexibility in higher gains by choosing external resistors.

The INA332 rejects line noise and its harmonics because common-mode error remains low even at higher frequencies. High bandwidth and slew rate make the INA332 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 INA332 outperforms discrete designs.

Additionally, because they are specified for wide temperature range of –55°C to +125°C and operating range of –65°C to +150°C, the INA331 family can be used in demanding industrial and automotive environments.

ABSOLUTE MAXIMUM RATINGS⁽¹⁾

Supply 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°C to +125°C

Storage Temperature ...................................................... –65°C to +150°C

Junction Temperature ...................................................................... 150°C

Lead Temperature (soldering, 10s) ................................................. 300°C

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.

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