INA827AIDGKR

1. Description

The INA827AIDGKR is a low-cost instrumentation amplifier (INA) that offers extremely low power consumption and operates over a very wide single- or dual-supply range. The device is optimized for the lowest possible gain drift of only 1 ppm per degree Celsius in G = 5, which requires no external resistor. However, a single external resistor sets any gain from 5 to 1000.

The INA827AIDGKR is optimized to provide excellent common-mode rejection ratio (CMRR) of over 88 dB (G = 5) over frequencies up to 5 kHz. In G = 5, CMRR exceeds 88 dB across the full input commonmode range from the negative supply all the way up to 1 V of the positive supply. Using a rail-to-rail output, the INA827 is well-suited for low-voltage operation from a 3-V singlesupply as well as dual supplies up to ±18 V. Additional circuitry protects the inputs against overvoltage of up to ±40 V beyond the power supplies by limiting the input currents to a save level.

The INA827AIDGKR is available in a small VSSOP-8 package and is specified for the –40°C to +125°C temperature range. For a similar instrumentation amplifier with a gain range of 1 V/V to 1000 V/V

2. Features

    1. Eliminates Errors from External Resistors at Gain of 5

    2. Common-Mode Range Goes Below Negative Supply

    3. Input Protection: Up to ±40 V

    4. Rail-to-Rail Output

    5. Outstanding Precision:

        – Common-Mode Rejection: 88 dB, minimum

        – Low Offset Voltage: 150 µV, maximum

        – Low Drift: 2.5 µV/°C, maximum

        – Low Gain Drift: 1 ppm/°C, max (G = 5 V/V)

        – Power-Supply Rejection: 100 dB, min (G = 5)

        – Noise: 17 nV/√Hz, G = 1000 V/V

    6. High Bandwidth:

        – G = 5: 600 kHz

        – G = 100: 150 kHz

    7. Supply Current: 

        – 200 µA, typical

    8. Supply Range:

        – Single Supply: 3 V to 36 V

        – Dual Supply: ±1.5 V to ±18 V

    9. Specified Temperature Range:

        –40°C to +125°C

  10. Package: 8-pin VSSOP

3. Applications

    1. Industrial Process Controls

    2. Multichannel Systems

    3. Power Automation

    4. Weigh Scales

    5. Medical Instrumentation

    6. Data Acquisition

4. Simplified Schematic

5. package