INA826 - Precision, 200-μA Supply Current, 36-V Supply Instrumentation Amplifier

The INA826 is a low-cost instrumentation amplifier that offers extremely low power consumption and operates over a very wide single or dual supply range. A single external resistor sets any gain from 1 to 1000. The device offers excellent stability over temperature, even at G > 1, as a result of the low gain drift of only 35 ppm/°C (max).

The INA826 is optimized to provide excellent common-mode rejection ratio of over 100 dB (G = 10) over frequencies up to 5 kHz. At G = 1, the common-mode rejection ratio exceeds 84 dB across the full input common-mode range from the negative supply all the way up to 1 V of the positive supply. Using a rail-to-rail output, the INA826 is well-suited for low voltage operation from a 3-V single supply 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 less than 8 mA.

The INA826 is available in 8-pin SOIC, VSSOP, and tiny 3-mm × 3-mm WSON surface-mount packages. All versions are specified for the –40°C to +125°C temperature range.

• Input Common-Mode Range: Includes V–
• Common-Mode Rejection:
  • 104 dB, Min (G = 10)
  • 100 dB, Min at 5 kHz (G = 10)
• Power-Supply Rejection: 100 dB, Min (G = 1)
• Low Offset Voltage: 150 µV, Max
• Gain Drift: 1 ppm/°C (G = 1), 35 ppm/°C (G > 1)
• Noise: 18 nV/√Hz, G ≥ 100
• Bandwidth: 1 MHz (G = 1), 60 kHz (G = 100)
• Inputs Protected Up to ±40 V
• Rail-to-Rail Output
• Supply Current: 200 µA
• 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
• Packages: 8-Pin VSSOP, SOIC, and WSON