1 Features

• Qualified for Automotive Applications
• AEC-Q100 Qualified With the Following Results:
  • Device Temperature Grade 1: −40°C to 125°C Ambient Operating Temperature Range
  • Device HBM ESD Classification Level 2
  • Device CDM ESD Classification Level C6
• Complete Unidirectional High-Side Current Measurement Circuit
• Wide Supply and Common-Mode Ranges
  • INA139-Q1: 2.7 V to 40 V
  • INA169-Q1: 2.7 V to 60 V
• Independent Supply and Input Common-Mode Voltages
• Single Resistor Gain Set
• Low Quiescent Current (60 μA Typical)
• Wide Temperature Range: –40°C to +125°C
• Package: TSSOP-8

2 Applications

• Electric Power Steering (EPS) Systems
• Body Control Modules
• Brake Systems
• Electronic Stability Control (ESC) Systems

3 Description

The INA139-Q1 and INA169-Q1 (INA1x9-Q1) are high-side, unidirectional, current shunt monitors. Wide input common-mode voltage range, high-speed, low quiescent current, and TSSOP-8 packaging enable use in a variety of applications.

The device converts a differential input voltage to a current output. This current is converted back to a voltage with an external load resistor that sets any gain from 1 to over 100. Although designed for current shunt measurement, the circuit invites creative applications in measurement and level shifting.

Both the INA139-Q1 and INA169-Q1 are available in a TSSOP-8 package, and are specified for the –40°C to +125°C temperature range.

1. For all available packages, see the package option addendum at the end of the data sheet.

Typical Application Circuit