INA169NA/3K

INA169NA/3K – High-Side Current Shunt Monitor

📌 Product Overview

The INA169NA/3K is a high-side, unidirectional current shunt monitor from Texas Instruments designed for precision current measurement applications. It converts a differential input voltage into a current output, which can then be converted back to a voltage using an external load resistor for flexible gain configuration.

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⚙️ Key Specifications

Parameter	Value
Supply Voltage Range	2.7V to 60V
Common-Mode Voltage Range	2.7V to 60V
Quiescent Current (Typical)	60 µA
Bandwidth	440 kHz
Accuracy	±0.5%
Input Offset Voltage (Vos)	1 mV
Input Bias Current (Ib)	100 nA
Common-Mode Rejection Ratio (CMRR)	120 dB
Input Offset Voltage Drift	0.5 µV/°C
Operating Temperature Range	-40°C to +85°C

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✨ Key Features

• Complete High-Side Current Measurement Circuit – Integrated solution without additional external components
• Wide Supply and Common-Mode Range – Supports 2.7V to 60V operation
• Independent Supply and Input Voltages – Flexible system integration
• Single-Resistor Gain Setting – Gain configurable from 1 to over 100
• Ultra-Low Quiescent Current – Only 60 µA typical consumption
• Compact SOT-23-5 Package – Space-efficient surface-mount design
• Industrial Temperature Range – -40°C to +85°C operation

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📦 Packaging Information

Package Type	SOT-23-5 (DBV)
Package Quantity	3,000 per reel (Tape & Reel)
MSL Rating / Peak Reflow	Level-2-260C-1 YEAR
Lead Finish / Ball Material	NiPdAu

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🔧 Applications

• Shunt Measurement – Automotive systems, telephones, computers
• Battery Management – Portable and backup battery systems
• Battery Chargers – Li-ion, NiMH, lead-acid charger monitoring
• Power Management – Industrial and consumer electronics
• Mobile Devices – Smartphones, tablets battery monitoring
• Precision Current Sources – Test equipment and measurement devices

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⚡ Working Principle

The INA169NA/3K senses the voltage drop across a shunt resistor placed between the power supply and the load. It converts this differential voltage into a proportional output current, which flows through an external load resistor to generate a measurable voltage. Gain is set by selecting the value of this external resistor.

Key Difference from INA139NA/3K: While both devices share the same core architecture, the INA169NA/3K supports a higher common-mode voltage range of up to 60V, compared to the INA139’s 40V maximum.

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📋 Compliance & Export Classification

RoHS Status	ROHS3 Compliant
REACH Status	REACH Unaffected
US ECCN	EAR99
HTSUS	8542.39.0090

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For complete technical documentation, including the full datasheet and application notes, please visit the Texas Instruments product page or contact your authorized distributor.