INA321E/2K5

The INA321 family is a series of rail-to-rail output, micropower CMOS instrumentation amplifiers that offer wide-range, single-supply, as well as bipolar-supply operation. The INA321 family provides low-cost, low-noise amplification of differential signals with micropower current consumption of 40μA. When shutdown, the INA321 has a quiescent current of less than 1μA. Returning to normal operations within microseconds, the shutdown feature makes the INA321 optimal for low-power battery or multiplexing applications. Configured internally for 5V/V gain, the INA321 offers exceptional flexibility with user-programmable external gain resistors. The INA321 reduces common-mode error over frequency and with CMRR remaining high up to 3kHz, line noise and line harmonics are rejected. The low-power design does not compromise on bandwidth or slew rate, making the INA321 ideal for driving sample Analog-to-Digital (A/D) converters as well as general-purpose applications. With high precision, low cost, and small packaging, the INA321 outperforms discrete designs, while offering reliability and performance.

Applications

• INDUSTRIAL SENSOR AMPLIFIERS: Bridge, RTD, Thermistor, Position
• PHYSIOLOGICAL AMPLIFIERS: ECG, EEG, EMG
• A/D CONVERTER SIGNAL CONDITIONING
• DIFFERENTIAL LINE RECEIVERS WITH GAIN
• FIELD UTILITY METERS
• PCMCIA CARDS
• COMMUNICATION SYSTEMS
• TEST EQUIPMENT
• AUTOMOTIVE INSTRUMENTATION

Key features

• LOW QUIESCENT CURRENT: 40μA/channel
• Shut Down: <1μA
• HIGH GAIN ACCURACY: G = 5, 0.02%, 2ppm/°C
• GAIN SET WITH EXTERNAL RESISTORS
• LOW OFFSET VOLTAGE: ±200μV
• HIGH CMRR: 94dB
• LOW BIAS CURRENT: 10pA
• BANDWIDTH: 500kHz, G = 5V/V
• RAIL-TO-RAIL OUTPUT SWING: (V+) - 0.02V
• WIDE TEMPERATURE RANGE: -55°C to +125°C
• SINGLE VERSION IN MSOP-8 PACKAGE AND DUAL VERSION IN TSSOP-14 PACKAGE