INA190-Q1
AEC-Q100, 40V, bi-directional, ultra-precise current sense amplifier w/picoamp IB & ENABLE
INA190-Q1
- AEC-Q100 qualified for automotive applications:
- Temperature grade 1: –40°C to +125°C, TA
- Functional Safety-Capable
- Low input bias currents: 500 pA (typical) (enables microamp current measurement)
- Low power:
- Low supply voltage, VS: 1.7 V to 5.5 V
- Low shutdown current: 100 nA (maximum)
- Low quiescent current: 50 µA at 25°C (typical)
- Accuracy:
- Common-mode rejection ratio: 132 dB (minimum)
- Gain error: ±0.2% (A1 device)
- Gain drift: 7 ppm/°C (maximum)
- Offset voltage, VOS: ±15 µV (maximum)
- Offset drift: 80 nV/°C (maximum)
- Wide common-mode voltage: –0.2 V to +40 V with survivability up to 42 V
- Bidirectional current sensing capability
- Gain options:
- INA190A1-Q1: 25 V/V
- INA190A2-Q1: 50 V/V
- INA190A3-Q1: 100 V/V
- INA190A4-Q1: 200 V/V
- INA190A5-Q1: 500 V/V
The INA190-Q1 is an automotive, low-power, voltage-output, current-shunt monitor (also called a current-sense amplifier). This device is commonly used for monitoring systems directly connected to an automotive 12-V battery. The INA190-Q1 can sense drops across shunts at common-mode voltages from –0.2 V to +40 V, independent of the supply voltage. In addition, the input pins have an absolute maximum voltage of 42 V.
The low input bias current of the device permits the use of larger current-sense resistors, thus providing accurate current measurements in the microamp range. The low offset voltage of the zero-drift architecture extends the dynamic range of the current measurement. This feature allows for smaller sense resistors with lower power loss, while still providing accurate current measurements.
The INA190-Q1 operates from a single 1.7-V to 5.5-V power supply, and draws a maximum of 65 µA of supply current when enabled; only 0.1 µA when disabled. Five fixed gain options are available: 25 V/V, 50 V/V, 100 V/V, 200 V/V, or 500 V/V. The device is specified over the operating temperature range of –40°C to +125°C, and offered in SC70 and SOT-23 packages.
Technical documentation
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
INA190EVM — INA190 current sensing evaluation module with low current layout
INA190 TINA-TI Reference Design (Rev. B)
CIRCUIT060035 — Bidirectional current sensing with a window comparator circuit
CIRCUIT060037 — Precision over-current latch circuit
PSPICE-FOR-TI — PSpice® for TI design and simulation tool
TINA-TI — SPICE-based analog simulation program
TIDA-00302 — Current Shunt Monitor with Transient Robustness Reference Design
Additionally, an external protection circuit is implemented to provide surge and fast-transient protection and demonstrate the different immunity levels to (...)
Package | Pins | Download |
---|---|---|
SOT-23-THN (DDF) | 8 | View options |
SOT-SC70 (DCK) | 6 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Support & training
TI E2E™ forums with technical support from TI engineers
Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.
If you have questions about quality, packaging or ordering TI products, see TI support.