描述 Description

INA500 is a difference amplifier with integrated op-amp and matched resistors that offers three gain options. INA500 has an A version that offers gain option of 1, while the B and C versions offer gain options of 0.50 and 0.25 respectively.

These are voltage sensing INAs in difference amplifier configuration with high input impedance of >1MΩ and low quiescent current of 13.5μA. The device achieves 75dB of minimum CMRR and an accurate ±0.05% of maximum gain error, along with 3.5mV of maximum offset (referred to output) in G = 1 configuration. The device can handle up to 27.5V (±13.75V) of input common-mode voltage in G = 0.25 with 5.5V (±2.75V) of supply voltage. The combination of specifications noted above makes INA500 a great choice for a variety of level translation and battery monitoring applications.

The precision matched integrated resistors of INA500 saves BOM costs and board space by removing the need for precise and low tolerance external resistors. The INA500 can interface directly to low-speed, 8-bit to 12-bit, analog-to-digital converters (ADC) and is an excellent choice for replacing discrete implementation of difference amplifiers built with commodity amplifiers and discrete resistors. INA500 is offered in standard 6-pin packages such as SOT-23 and SC70 as well as the space saving, X2SON package.

特性 Features

Optimized for small-size, low-power, and low-cost

>1MΩ Ultra-high input impedance

Three gain options (G = 1, 0.50, and 0.25)

Good precision for 8-bit to 12-bit systems

CMRR: 87dB (typical)

Gain error: ±0.01% (typical)

Offset voltage: ±0.70mV (typical)



Space saving 0.8mm2 X2SON package

Bandwidth: 125kHz (typical)

Drives 200pF with <20% overshoot (typical)

Low quiescent current: 13.5μA (typical)

Supply range: 1.7V (±0.85V) to 5.5V (±2.75V)

Specified temperature range: –40°C to 125°C