| Number of channels (#) | 1 |
| Vs (Max) (V) | 5.5 |
| Vs (Min) (V) | 2.5 |
| Input offset (+/-) (Max) (uV) | 500 |
| Gain (Min) (V/V) | 5 |
| Gain (Max) (V/V) | 1000 |
| Noise at 1 kHz (Typ) (nV/rt (Hz)) | 46 |
| Features | Cost Optimized, Shutdown |
| CMRR (Min) (dB) | 90 |
| Input bias current (+/-) (Max) (nA) | 0.01 |
| Iq (Typ) (mA) | 0.415 |
| Bandwidth at min gain (Typ) (MHz) | 2 |
| 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) | 7 |
| Gain non-linearity (+/-) (Max) (%) | 0.01 |
- DESIGNED FOR LOW COST
- HIGH GAIN ACCURACY: G = 5, 0.02%, 2ppm/°C
- GAIN SET WITH EXT. RESISTORS FOR >5V/V
- LOW OFFSET VOLTAGE: ±250 μV
- 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: 490 μA max/chan
- SHUT DOWN: 0.01 μA
- 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
- INDUSTRIAL SENSOR AMPLIFIERS:
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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.