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INA139NA/3K
CURRENT MONITOR 0.5% SOT23-5
Texas Instruments
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Design a Custom BoardAbout This Component
High-side current sense monitor IC measuring voltage drops across external sense resistors with 0.5% accuracy. Provides rail-to-rail output voltage proportional to monitored current flow. Ideal for power supply monitoring, battery management, motor control, and load detection applications requiring precise current measurement without breaking circuit paths.
Package: SOT-23-5 · 5 pins
Why does this need a breakout?
This 0.95 mm pitch SMD package is incompatible with breadboards and difficult to hand-solder. A breakout board brings the five pins to standard 0.1″ spacing, enabling rapid prototyping without reflow equipment. Essential for evaluating precision analog ICs like current-sense amplifiers in development circuits.
Specifications
ELECTRICAL CHARACTERISTICS
| Manufacturer | Texas Instruments |
| Part Number | INA139NA/3K |
| Package | SOT-23-5 |
| Pin Count | 5 |
| Voltage - Input | 2.7V ~ 40V |
What's Included
BILL OF MATERIALS
- 1x INA139NA/3K soldered onto breakout PCB
- Pin headers pre-soldered (2.54mm / 0.1" pitch)
- All IC pins broken out to 2.54mm headers
Breakout Board Design
PCB SPECIFICATIONS
WIDTH
< 0.9" (straddles breadboard)
PITCH
2.54mm standard
SOLDER
Lead-free, reflow assembled
FINISH
FR4, lead-free HASL