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Product Detailed Parameters
- Description：AEC-Q100, 26-V, 350-KHZ, BI-DIRE
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- Amplifier Type：Current Sense
- Number of Circuits：1
- Output Type：Single Ended, Rail-to-Rail
- Slew Rate：2V/µs
- Gain Bandwidth Product：-
- Current - Input Bias：75 µA
- Voltage - Input Offset：25 µV
- Current - Supply：200µA
- Current - Output / Channel：-
- Voltage - Supply Span (Min)：2.7 V
- Voltage - Supply Span (Max)：5.5 V
- Operating Temperature：-40°C ~ 125°C (TA)
- Grade：Automotive
- Qualification：AEC-Q100
- Mounting Type：Surface Mount
- Package / Case：6-TSSOP, SC-88, SOT-363
- Supplier Device Package：SC-70-6
- -3db Bandwidth：105 kHz
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Overview
The INA185A4QDCKRQ1 is an AEC-Q100 qualified, bidirectional current-sense amplifier designed for automotive applications. It operates with a supply voltage of 2.7V to 5.5V and supports common-mode voltages from -0.2V to 26V. The device features a fixed gain of 200V/V, a maximum offset voltage of ±100µV at 12V common-mode, and a bandwidth of 105kHz. It draws a maximum quiescent current of 300µA across the operating temperature range of -40°C to 125°C.
Feature Summary
- Bidirectional current sensing capability allows measurement of current flow in both directions through a shunt resistor.
- High common-mode voltage range enables high-side and low-side sensing independent of the power supply voltage.
- Integrated matched resistor network minimizes gain error and reduces temperature drift for improved accuracy.
Applications
- Body Control Modules
- Zonal Control Modules
- ADAS Domain Controllers
- ADAS Sensor Diagnostics
Procurement Notes
Verify the specific suffix 'A4' confirms the 200V/V gain option during procurement. Confirm the 'Q1' designation indicates AEC-Q100 qualification for automotive use. Ensure the 'DCK' package matches the SC-70-6 footprint requirements. Validate that the component meets the required functional safety documentation standards if applicable to the system design.
Selection Notes
Select this device when a fixed gain of 200V/V is required for precise low-current measurements. Consider the 105kHz bandwidth for applications requiring moderate signal response speeds. Evaluate the 26V common-mode range against the system bus voltage. Check the output swing limitations relative to the ADC input range for optimal dynamic performance.
Part Context
This component belongs to the INA185-Q1 family of high-precision current sense amplifiers. It shares the same core architecture as other gain variants (A1, A2, A3) but is specifically configured with a 200V/V internal gain network. The device is part of Texas Instruments' portfolio of automotive-grade analog components designed for space-constrained environments.
Replacement Considerations
INA185A1QDCKRQ1
FAQ
What is the maximum common-mode voltage supported by the INA185A4QDCKRQ1?
The device supports a common-mode voltage range from -0.2V to 26V, allowing it to operate independently of the supply voltage.
How does the REF pin affect the operation of this amplifier?
The REF pin sets the output voltage level corresponding to zero current. Applying a voltage to this pin enables bidirectional sensing or adjusts the output bias for unidirectional applications.
