36V, bi-directional, 550kHz, 4V/µs, high-precision current sense amplifier w/ dual comparators
Product details
Parameters
Package | Pins | Size
Features
- Wide common-mode input range: –0.1 V to +36 V
- Dual comparator outputs:
- INA302: Two independent overlimit alerts
- INA303: Window comparator
- Threshold levels set individually
- Comparator 1 alert response: 1 µs
- Comparator 2 adjustable delay: 2 µs to 10 s
- Open-drain outputs with independent latch control modes
- High accuracy amplifier:
- Offset voltage: 30 µV (max, A3 version)
- Offset voltage drift: 0.5 µV/°C (max)
- Gain error: 0.15% (max, A3 version)
- Gain error drift: 10 ppm/°C
- Available amplifier gains:
- INA302A1, INA303A1: 20 V/V
- INA302A2, INA303A2: 50 V/V
- INA302A3, INA303A3: 100 V/V
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Description
The INA302 and INA303 (INA30x) devices feature a high common-mode, bidirectional, current-sensing amplifier and two high-speed comparators to detect out-of-range current conditions. The INA302 comparators are configured to detect and respond to overcurrent conditions. The INA303 comparators are configured to respond to both overcurrent and undercurrent conditions in a windowed configuration. These devices feature an adjustable limit threshold range for each comparator set using an external limit-setting resistor. These current-shunt monitors can measure differential voltage signals on common-mode voltages that can vary from –0.1 V up to +36 V, independent of the supply.
The open-drain alert outputs can be configured to operate in either a transparent mode (output status follows the input state), or in a latched mode (alert output is cleared when the latch is reset). The alert response time for comparator 1 is under 1 µs, and the alert response for comparator 2 is set through an external capacitor ranging from 2 µs to 10 s.
These devices operate from a single 2.7-V to 5.5-V supply, drawing a maximum supply current of 950 µA. The devices are specified over the extended operating temperature range of –40°C to +125°C, and are available in a 14-pin TSSOP package.
Similar but not functionally equivalent to the compared device:
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
- Small form factor
- Features all 3 gain variants of the INA302 (20V/V, 50V/V and 100V/V)
- LED indicators to conveniently monitor comparator output signals
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
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download TIDA-00302 BOM.pdf (52KB)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
TSSOP (PW) | 14 | View options |
Ordering & quality
- RoHS
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- Device marking
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- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Support & training
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