描述 Description

The INA849 is an ultra-low noise instrumentation amplifier optimized for maximum accuracy in high-resolution systems and operation over a wide single-supply or dual-supply range. The device offers significantly lower input bias current than competitors as a result of super-beta input transistors. A state-of-the-art manufacturing process provides exceptionally low voltage noise, input offset voltage, and offset voltage drift.

Precisely matched integrated resistors provide a high, 92-dB (G?=?1) common-mode rejection across the full input common-mode range. A single external resistor sets any gain from 1 to 10,000. The current-feedback topology of the INA849 provides wide bandwidth at higher gains for very-small, fast-moving signals. For example, the device provides 8?MHz of bandwidth at G?=?100, and 28?MHz at a G?=?1, with a fast 0.4-μs settling time (0.01%) for directly driving high-resolution, analog-to-digital converters (ADCs).

特性 Features

? Ultra-low noise: 1-nV/√Hz input voltage noise (typical)
? Precision super-beta input performance:
? Low offset voltage: 35 μV (maximum)
? Low offset voltage drift: 0.4 μV/°C (maximum)
? Low input bias current: 20 nA (maximum)
? Low gain drift: 5 ppm/°C for G = 1 (maximum)

? Bandwidth: 28 MHz (G = 1), 8 MHz (G = 100)
? Slew rate: 35 V/μs
? Common-mode rejection: 120 dB (minimum) for maximum gain
? Supply range:
? Single supply: 8 V to 36 V
? Dual supply: ±4 V to ±18 V

? Specified temperature range: –40°C to +125°C
? Packages: 8-pin SOIC and VSSOP