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INA139NA/3K High-Side Current Shunt Monitor Features High Accuracy Wide 2.7-36V Supply Low 90µV Offset +85°C Rating Fixed 3k Gain SC70 Package Bidirectional Operation and Excellent DC Performance
Features
• Complete Unipolar High-Side Current Measurement Circuit
• WideSupply and Common-Mode Range
• INA139: 2.7 V to 40 V
• INA169: 2.7 V to 60 V
• Independent Supply and Input Common-Mode Voltages
• Single Resistor Gain Set
• LowQuiescent Current: 60 µA (Typical)
• 5-Pin, SOT-23 Packages
Applications
• Current Shunt Measurement:
– Automotive, Telephone, Computers
• Portable and Battery-Backup Systems
• Battery Chargers
• Power Management
• Cell Phones
• Precision Current Source
Description
The INA139 and INA169 are high-side, unipolar, current shunt monitors. Wide input common-mode voltage range, high-speed, low quiescent current, and tiny SOT-23 packaging enable use in a variety of applications.
Input common-mode and power-supply voltages are independent and can range from 2.7 V to 40 V for the INA139 and 2.7 V to 60 V for the INA169. Quiescent current is only 60 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.
Both the INA139 and INA169 are available in 5-pin SOT-23 packages. The INA139 device is specified for the–40°C to +125°C temperature range, and the INA169 is specified from–40°C to +85°C.
INFORMATION
Category | | |
Manufacturer | Texas Instruments | |
Series | - | |
Packaging | Tape & Reel (TR) Cut Tape (CT) Digi-Reel® | |
Part Status | Active | |
Function | Current Monitor | |
Sensing Method | High-Side | |
Accuracy | ±0.5% | |
Voltage - Input | 2.7V ~ 40V | |
Current - Output | - | |
Operating Temperature | -40°C ~ 125°C (TA) | |
Mounting Type | Surface Mount | |
Package / Case | SC-74A, SOT-753 | |
Supplier Device Package | SOT-23-5 | |
Base Product Number |
Drawing
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