INA139NA/3KG4
| Parameters | |
|---|---|
| Series | - |
| Moisture Sensitivity Level (MSL) | 2 (1 Year) |
| RoHS Status | ROHS3 Compliant |
| Package / Case | SC-74A, SOT-753 |
| Mfr | Texas Instruments |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 125°C (TA) |
| Sensing Method | High-Side |
| Voltage - Input | 2.7V ~ 40V |
| Current - Output | - |
| Supplier Device Package | SOT-23-5 |
| Accuracy | ±0.5% |
| Function | Current Monitor |
| Package | Tape & Reel (TR) |
| Product Status | Discontinued at Digi-Key |
| Base Product Number | INA139 |
| REACH Status | REACH Unaffected |
| Standard Package | 3,000 |
| ECCN | EAR99 |
| HTSUS | 8542.33.0001 |
INA139NA/3KG4 High-Side Current Shunt Monitor Regulator
The INA139NA/3KG4 is a high-precision high-side current shunt monitor from Texas Instruments (TI), belonging to the INA1x9 series, designed for unipolar current measurement with automotive-grade reliability. It features a complete high-side measurement circuit with 2.7V-40V wide supply and common-mode voltage range, enabling independent supply and input common-mode voltages for flexible integration. With a current output convertible to voltage via an external resistor, it supports adjustable gain (1V/V to over 100V/V) with a single external resistor, ultra-low typical quiescent current of 60μA, 220kHz bandwidth for fast response, and ±0.5% measurement accuracy, packaged in a compact 5-pin SOT-23 (SC-74A, SOT-753) surface-mount package, ideal for space-constrained, low-power current monitoring in automotive and industrial designs.
Operating at 2.7V-40V supply voltage, the INA139NA/3KG4 operates reliably across -40°C to 125°C industrial temperature range, with a minimum common-mode rejection ratio (CMRR) of 100dB for stable measurement in noisy environments. It has a maximum input offset voltage of 1mV, gain error of ±2%, and typical input bias current of 10μA, ensuring high measurement precision. Fully RoHS-compliant with lead-free construction, it features excellent ESD protection, 125μA maximum quiescent current, and automotive compatibility, making it suitable for battery-powered, high-precision, and harsh-environment current monitoring applications.
Alternative current IC Models
● TI INA139NA/3K: high-side current monitor, 5-SOT-23, 2.7V-40V, direct pin-compatible substitute with identical performance.
● ADI AD620BR: instrumentation amplifier, 8-SOIC, 2.7V-36V, high-CMRR alternative for high-precision measurement.
● TI INA149NA/3K: current shunt monitor, 5-SOT-23, 2.7V-40V, low-offset alternative for ultra-precise applications.
● STMicroelectronics TSC2007IPW: current monitor, 16-TSSOP, 2.7V-5.5V, cost-effective substitute for low-voltage current monitoring.
