Texas INA168QPWRQ1--Current Sense Amplifiers

INA168QPWRQ1 Description

The INA168-Q1 (INA1x8-Q1) devices are high-side, unidirectional, current sense amplifiers. Wide input common-mode voltage range, low quiescent current, and TSSOP and SOT-23 packaging enable use in a variety of applications.

 

Input common-mode and power-supply voltages are independent, and range from 2.7 V to 60 V for the INA168-Q1. Quiescent current is only 25 µA, which permits connecting the power supply to either side of the current-measurement shunt with minimal error.

 

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.

 

Available in a TSSOP-8 and SOT-23-5 package. They are specified for the –40°C to +125°C temperature range.

 

INA168QPWRQ1 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 Unipolar High-Side Current-Measurement Circuit

Wide Supply and Common-Mode Ranges:

INA168-Q1: 2.7 V to 60 V

Independent Supply and Input Common-Mode Voltages

Single Resistor Gain Set

Low Quiescent Current (25 µA Typical)

Wide Temperature Range: –40°C to +125°C

Packages: TSSOP-8, SOT-23-5 (INA168-Q1)

 

Detailed Description

INA168-Q1 devices are comprised of a high-voltage, precision operational amplifier, precision thin film resistors trimmed in production to an absolute tolerance, and a low-noise output transistor. The INA1x8-Q1 are powered from a single power supply, and the input voltages can exceed the power supply voltage. The INA1x8-Q1 are ideal for measuring small differential voltages, such as those generated across a shunt resistor, in the presence of large common-mode voltages.  

 

Functional Block Diagram

 

INA168QPWRQ1 Applications

Electric Power Steering (EPS) Systems

Body Control Modules

Brake Systems

Electronic Stability Control (ESC) Systems

 

Typical Application Circuit

INA168QPWRQ1 Product Parameter

Manufacturer	Texas	Manufacturer's Part #	INA168QPWRQ1
Categories	Integrated Circuits (ICs)	Sub-Categories	PMIC - Current Regulation/Management
Series	Automotive, AEC-Q100	Part Status	Active
Function	Current Monitor	Sensing Method	High-Side
Accuracy	±0.5%	Voltage - Input	2.7V~60V
Operating Temperature	-40°C~125°C	Mounting Type	Surface Mount
Package / Case	8-TSSOP (0.173, 4.40mm Width)	Factory Lead Time	6 Weeks
Lifecycle Status	ACTIVE (Last Updated: 2 days ago)	Number of Pins	8
Packaging	Tape & Reel (TR)	Pbfree Code	yes
Number of Terminations	8	Terminal Finish	Nickel/Palladium/Gold (Ni/Pd/Au)
Subcategory	Operational Amplifier	Terminal Position	DUAL
Terminal Form	GULL WING	Base Part Number	INA168
Number of Channels	1	Amplifier Type	OPERATIONAL AMPLIFIER
Height	1.2mm	Length	3mm
Width	4.4mm	Thickness	1mm
Mount	Surface Mount	Peak Reflow Temperature (Cel)	260
Terminal Pitch	0.65mm	Max Supply Voltage	60V
Min Supply Voltage	2.7V	Nominal Supply Current	45μA
Radiation Hardening	No	Lead Free	Lead Free
Common Mode Rejection Ratio	100 dB	Weight	34.50137mg
Input Offset Voltage (Vos)	2mV	Input Bias Current	10nA

 

INA168QPWRQ1 Manufacturer

Texas Instruments is a semiconductor multinational company in Texas, USA. It is famous for developing, manufacturing, and selling semiconductor and computer technology. It is mainly engaged in innovative digital signal processing and analog circuits. In addition to the semiconductor business, it also provides solutions including sensing and control, educational products and digital light source processing. Texas Instruments (TI) is headquartered in Dallas, Texas, USA, and has manufacturing, design or sales organizations in more than 25 countries.