2.7 to 60V, 440kHz Variable gain current sense amplifier
Product details
Parameters
Package | Pins | Size
Features
- Complete Unipolar High-Side Current Measurement Circuit
- Wide Supply 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
- Low Quiescent Current: 60 µA (Typical)
- 5-Pin, SOT-23 Packages
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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.
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Technical documentation
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View all 10 | Type | Title | Date | |
|---|---|---|---|
| * | Datasheet | INA1x9 High-Side Measurement Current Shunt Monitor datasheet (Rev. F) | Feb. 27, 2017 |
| Technical article | How current-sense amplifiers monitor satellite health | Feb. 08, 2021 | |
| Application note | Current Sensing in a Programmable Logic Controller (PLC) (Rev. A) | Dec. 04, 2020 | |
| Technical article | A key to accurate system thermal management: monitoring both current flow and temperature | Oct. 04, 2018 | |
| Application note | High-voltage, high-side floating current sensing circuit using current output, c | Jun. 28, 2018 | |
| Application note | Extending Common-Mode Range of Current-Sense Amplifiers | Jul. 06, 2017 | |
| Technical article | System trade-offs for high- and low-side current measurements | Jun. 01, 2017 | |
| Application note | Precision LED Brightness and Color Mixing With Discrete Current Sense Amplifiers | Feb. 28, 2017 | |
| Technical article | Why should you care about overcurrent protection in your system? | Jun. 16, 2016 | |
| Application note | Extending Voltage Range of Current Shunt Monitor | Feb. 15, 2006 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Design tools & simulation
SBOC008B.ZIP (38 KB) - PSpice Model
SBOC162C.TSC (82 KB) - TINA-TI Reference Design
SBOM223B.ZIP (4 KB) - TINA-TI Spice Model
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
TINA-TI — TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
Reference designs
TIDA-01081 — This LED lighting control reference design demonstrates a unique approach to drive and control a string of multiple high-power light-emitting diodes (LEDs). This reference design is targeted for industrial machine vision systems and is also suitable for other industrial or automotive lighting (...)
Design files
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download TIDA-01081 BOM.pdf (77KB) -
download TIDA-01081 Assembly Drawing.pdf (583KB) -
download TIDA-01081 PCB.pdf (3989KB) -
download TIDA-01081 CAD Files.zip (3673KB) -
download TIDA-01081 Gerber.zip (1282KB)
PMP9010 — This wide input voltage range boost operates from an input of 9V - 32V and regulates current in two strings of 13 LEDs. A second control loop monitors and regulates the input current during drop outs or faults. Discrete linear regulators at the bottom of each string control the individual string (...)
Design files
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download PMP9010 BOM.pdf (32KB) -
download PMP9010 PCB.pdf (2583KB) -
download PMP9010 Assembly Drawing.pdf (107KB)
PMP8948 — This wide input voltage range boost operates from an input of 9V - 32V and regulates current in two strings of 13 LEDs. Additionally, a second control loop monitors and regulates the input current during drop outs or faults. This low cost design operates at greater than 94% efficiency.
Design files
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download PMP8948 Bill of Materials.pdf (21KB) -
download PMP8948 Gerber.zip (198KB) -
download PMP8948 PCB.pdf (1956KB)
CAD/CAE symbols
| Package | Pins | Download |
|---|---|---|
| SOT-23 (DBV) | 5 | View options |
Ordering & quality
Information included:
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- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Support & training
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