AEC-Q100, 26V, 350kHz current sense amplifier with integrated overcurrent comparator
Product details
Parameters
Package | Pins | Size
Features
- Qualified for Automotive Applications
- AEC-Q100 Qualified With the Following Results:
- Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature
- Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature
- Common-mode input range: –0.2 V to +26 V
- High accuracy amplifier:
- Offset voltage at TA = 25°C
- 500 µV (maximum) at VCM = 12 V
- 150 µV (maximum) at VCM = 0 V
- Offset voltage drift: 1 µV/°C (maximum)
- Gain error: 1% (maximum) at 25°C
- Gain error drift: 20 ppm/°C (maximum)
- Offset voltage at TA = 25°C
- Available amplifier gains:
- INA381A1-Q1: 20 V/V
- INA381A2-Q1: 50 V/V
- INA381A3-Q1: 100 V/V
- INA381A4-Q1: 200 V/V
- Open-drain comparator:
- Hysteresis: 50 mV
- Propagation delay: 400 ns (typical)
- Alert threshold set through external reference voltage
- Supports transparent and latching modes
- Package: VSSOP-10
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Description
The INA381-Q1 includes both a 26-V common-mode, current-sensing amplifier and a high-speed comparator. This device detects overcurrent conditions by measuring the voltage developed across a current-shunt resistor and comparing that voltage to a user-defined threshold limit set by the comparator reference pin. The current-shunt monitor can measure differential voltage signals on common-mode voltages that vary from –0.2 V up to 26 V, independent of the supply voltage.
The open-drain alert output can be configured to operate in two modes: transparent or latched. In transparent mode, the output status follows the input state. In latched mode, the alert output is cleared only when the latch is reset. The standalone comparator large-signal alert response time is less than 2 µs, allowing for quick detection of overcurrent events. The total system overcurrent protection response time provided by the INA381-Q1 is less than 10 µs.
This device operates from a single 2.7-V to 5.5-V supply, drawing a maximum supply current of 350 µA. The device is specified over an operating temperature range of –40°C to +125°C, and is available in the 10-pin VSSOP package.
Technical documentation
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
Features
- Evaluation of the INA381x in all gain options
- Test points to allow ease of acess to device pins
- Capability to evaluate both high- and low-side configurations
Design tools & simulation
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
- (...)
Reference designs
Additionally, an external protection circuit is implemented to provide surge and fast-transient protection and demonstrate the different immunity levels to (...)
Design files
-
download TIDA-00302 BOM.pdf (52KB)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
VSSOP (DGS) | 10 | View options |
Ordering & quality
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- Device marking
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- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Support & training
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