1 Features
• Wide common-mode voltage:
– Operational voltage: −4 V to +110 V
– Survival voltage: −20 V to +120 V
• High signal bandwidth: 1.3 MHz
• Slew rate: 2.5 V/μs
• Excellent CMRR: 160 dB
• Accuracy
– Gain error (maximum)
• Version A: 0.15%, 10 ppm/°C drift
• Version B: 0.5%, 20 ppm/°C drift
– Offset voltage (maximum)
• Version A: ±20 μV, ±0.25 μV/°C drift
• Version B: ±150 μV, ±1 μV/°C drift
• On-board open-drain comparator
• Internal comparator voltage reference: 0.6 V
• Propagation delay time: 1 μs
• Latching capability on comparator
• Available gains:
– INA310A1, INA310B1 : 20 V/V
– INA310A2, INA310B2 : 50 V/V
– INA310A3, INA310B3 : 100 V/V
– INA310A4, INA310B4 : 200 V/V
– INA310A5, INA310B5 : 500 V/V
• Package options: VSSOP-8

2 Applications
• 48 V DC/DC converter
• 48 V battery management systems (BMS)
• Test and measurement
• Macro remote radio unit (RRU)
• 48 V rack server
• 48 V merchant network & server power supply
(PSU)
• Solenoids and actuators

3 Description
The INA310x is an ultra-precise current sense
amplifier that can measure voltage drops across
shunt resistors over a wide common-mode range
from –4 V to 110 V, independent of supply voltage
with an integrated comparator. The high precision
current measurement accuracy is achieved through a
combination of low offset voltage (20 μV, maximum),
small gain error (0.15%, maximum) and a high DC
CMRR (160 dB, typical). The INA310x has a high
signal bandwidth of 1.3 MHz designed for high
voltage DC current measurements and high-speed
applications like fast overcurrent protection.
The INA310x incorporates an open-drain comparator
and internal reference that provides a 0.6 V threshold.
An external resistive divider sets the current trip point.
The comparator includes a latching capability that can
be made transparent by grounding (or leaving open)
the RESET pin.
The INA310x operates from a single 2.7 V to 20 V
supply and draws 1.6 mA of supply current. The
INA310x is available in five gain options: 20 V/V,
50 V/V, 100 V/V, 200 V/V, and 500 V/V. These gain
options address a wide dynamic range of currentsensing
applications.
The INA310x is specified over an operating
temperature range of −40°C to +125°C and is offered
in a space-saving 8-pin VSSOP package.