Texas Instruments INA827
The INA827 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. The INA827 is optimized to provide excellent common-mode rejection ratio (CMRR) of over 88 dB (G = 5) over frequencies up to 5 kHz.FEATURES
●1 Eliminates Errors from External Resistors at Gain of 5● Common-Mode Range Goes Below Negative Supply
● Input Protection: Up to ±40 V
● Rail-to-Rail Output
● 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
● High Bandwidth: – G = 5: 600 kHz – G = 100: 150 kHz
● Supply Current: 200 µA, typical
● Supply Range: – Single Supply: 3 V to 36 V – Dual Supply: ±1.5 V to ±18 V
● Specified Temperature Range: –40°C to +125°C
● Package: 8-pin VSSOP 2
APPLICATIONS
● Industrial Process Controls● Multichannel Systems
● Power Automation
● Weigh Scales
● Medical Instrumentation
● Data Acquisition 3
DESCRIPTION
However, a single external resistor sets any gain from 5 to 1000. 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.