| Number of channels (#) | 2 |
| Vs (Max) (V) | 5.5 |
| Vs (Min) (V) | 2.5 |
| Input offset (+/-) (Max) (uV) | 1000 |
| Gain (Min) (V/V) | 5 |
| Gain (Max) (V/V) | 1000 |
| Noise at 1 kHz (Typ) (nV/rt (Hz)) | 100 |
| Features | Cost Optimized |
| CMRR (Min) (dB) | 80 |
| Input bias current (+/-) (Max) (nA) | 0.01 |
| Iq (Typ) (mA) | 0.04 |
| Bandwidth at min gain (Typ) (MHz) | 0.5 |
| Gain error (+/-) (Max) (%) | 0.1 |
| Operating temperature range (C) | -55 to 125 |
| Type | Resistor |
| Output swing headroom (to negative supply) (Typ) (V) | 0.025 |
| Output swing headroom (to positive supply) (Typ) (V) | -0.025 |
| Input common mode headroom (to negative supply) (Typ) (V) | 0.55 |
| Input common mode headroom (to positive supply) (Typ) (V) | -1.7 |
| Noise at 0.1 Hz-10 Hz (Typ) (uVpp) | 20 |
| Gain non-linearity (+/-) (Max) (%) | 0.01 |
- 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
- 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
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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 nanoseconds, 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.