1 Features
• AEC-Q100 qualified for automotive applications:
– Temperature grade 1: −40°C to +125°C, TA
• Functional Safety-Capable
– Documentation available to aid functional safety
system design
• 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
• Onboard open-drain comparator
• Internal comparator voltage reference: 0.6 V
• Propagation delay time: 1 μs
• Latching capability on comparator
• Available gains:
– INA310A1-Q1, INA310B1-Q1 : 20 V/V
– INA310A2-Q1, INA310B2-Q1 : 50 V/V
– INA310A3-Q1, INA310B3-Q1 : 100 V/V
– INA310A4-Q1, INA310B4-Q1 : 200 V/V
– INA310A5-Q1, INA310B5-Q1 : 500 V/V
• Package options: VSSOP-8

2 Applications
• eTurbo/charger
• Electric power steering (EPS)
• Starter/generator
• Regenerative breaking
• Brake system

3 Description
The INA310x-Q1 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-Q1 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-Q1 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-Q1 operates from a single 2.7 V to
20 V supply and draws 1.6 mA of supply current.
The INA310x-Q1 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
current-sensing applications.