Overview
The INA293B3QDBVRQ1 is a high-precision current sense amplifier manufactured by Texas Instruments. This device is part of the INA293-Q1 family, which is designed to measure voltage drops across shunt resistors over a wide common-mode range from –4 V to 110 V. The INA293-Q1 series is known for its ultra-precise zero-drift topology, excellent common-mode rejection ratio (CMRR), and high bandwidth, making it suitable for a variety of high-speed and precision current measurement applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (Vs) | 2.7 to 20 | V |
| Common-Mode Input Range (VCM) | –4 to 110 | V |
| Differential Sense Input Range (VSENSE) | 0 to Vs | V |
| Gain (INA293B3QDBVRQ1) | 100 V/V | |
| Bandwidth | 1.3 MHz | |
| Slew Rate | 2.5 V/µs | |
| Quiescent Current (IQ) | 1.5 mA | |
| Input Offset Voltage (Vos) | ±10 µV (typ), ±50 µV (max) | |
| Common-Mode Rejection Ratio (CMRR) | 140 dB (typ), 85 dB at 50 kHz | |
| Operating Temperature Range (TA) | –40°C to +125°C | |
| Package | SOT-23 (5 pins) |
Key Features
- Ultra-Precise Zero-Drift Topology: Ensures highly accurate current measurements with low offset voltage and small gain error.
- Wide Common-Mode Range: Operates from –4 V to 110 V, allowing for measurements below ground and in high-voltage applications.
- High Bandwidth and Slew Rate: 1.3 MHz bandwidth and 2.5 V/µs slew rate support high-speed applications such as fast over-current protection.
- Multiple Gain Options: Available with gains of 20 V/V, 50 V/V, 100 V/V, 200 V/V, and 500 V/V to address various dynamic range requirements.
- Low Quiescent Current: Draws only 1.5 mA of supply current, making it power-efficient.
- AEC-Q100 Qualified: Suitable for automotive and other high-reliability applications.
Applications
- 48-V Automotive Systems: Ideal for current sensing in automotive applications, including solenoid control and DC/DC converters.
- Valve Control: Used in precise control of valves in various industrial and automotive contexts.
- High-Speed Current Measurement: Suitable for applications requiring fast over-current protection and high-speed current sensing.
- Half-Bridge Applications: Can measure recirculating currents in half-bridge configurations due to its ability to operate below ground.
Q & A
- What is the common-mode input range of the INA293B3QDBVRQ1?
The common-mode input range is from –4 V to 110 V. - What are the available gain options for the INA293-Q1 series?
The gain options are 20 V/V, 50 V/V, 100 V/V, 200 V/V, and 500 V/V. - What is the bandwidth of the INA293B3QDBVRQ1?
The bandwidth is 1.3 MHz. - What is the slew rate of the INA293B3QDBVRQ1?
The slew rate is 2.5 V/µs. - What is the quiescent current of the INA293B3QDBVRQ1?
The quiescent current is 1.5 mA. - What is the operating temperature range of the INA293B3QDBVRQ1?
The operating temperature range is from –40°C to +125°C. - Is the INA293B3QDBVRQ1 AEC-Q100 qualified?
Yes, it is AEC-Q100 qualified, making it suitable for automotive and other high-reliability applications. - What package is the INA293B3QDBVRQ1 available in?
The INA293B3QDBVRQ1 is available in a SOT-23 (5-pin) package. - What are some typical applications of the INA293B3QDBVRQ1?
Typical applications include 48-V automotive systems, solenoid control, DC/DC converters, valve control, and high-speed current measurement. - What is the input offset voltage of the INA293B3QDBVRQ1?
The input offset voltage is ±10 µV (typical) and ±50 µV (maximum).
