1 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

2 Applications
• Battery cell formation and test equipment
• String inverter
• EV charging station power module
• Battery energy storage system
• Power tools
• Industrial AC-DC
• Wearable fitness and activity monitor

3 Description
The INA500 is a difference amplifier with integrated
op-amp and matched resistors that offers three gain
options. The INA500A version offers gain option of 1,
while the INA500B and INA500C 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 are designed for a variety of level
translation and battery monitoring applications.
The precision matched integrated resistors of the
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. The INA500 is offered in standard 6-pin
packages such as SOT-23 and SC70 as well as the
space saving, X2SON package.