Overview
The INA290A3QDCKRQ1, produced by Texas Instruments, is an ultra-precise current sense amplifier designed for high-side current sensing applications. This device operates over a wide common-mode range from 2.7 V to 120 V, making it suitable for various automotive and industrial applications. The INA290-Q1 features a zero-drift topology, excellent common-mode rejection ratio (CMRR), high bandwidth, and a fast slew rate, ensuring precise and rapid current measurements.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VS) | 2.7 | - | 20 | V |
| Common-Mode Range | 2.7 | - | 120 | V |
| Offset Voltage (Vos) | - | - | ±12 µV (A4, A5 devices) | µV |
| Gain Error | - | - | ±0.1% (maximum) | % |
| DC CMRR | 140 | 160 | - | dB |
| AC CMRR at 50 kHz | - | 85 | - | dB |
| Bandwidth (at gain of 20 V/V) | - | 1.1 MHz | - | MHz |
| Slew Rate | - | 2 | - | V/µs |
| Quiescent Current (IQ) | 370 | - | 500 | µA |
| Package | - | - | SC-70 (5-pin) | - |
| Body Size | - | - | 2.00 mm × 1.25 mm | mm |
Key Features
- Ultra-Precise Current Measurement: Achieved through an ultra-low offset voltage of ±12 µV (maximum) and a small gain error of ±0.1% (maximum).
- Wide Common-Mode Range: Operates from 2.7 V to 120 V, with a high DC CMRR of 160 dB (typical) and an 85-dB AC CMRR at 50 kHz.
- High Bandwidth and Slew Rate: Bandwidth of 1.1 MHz at a gain of 20 V/V and a slew rate of 2 V/µs, suitable for fast overcurrent protection and high-speed applications.
- Low VSENSE Operation: Accurate current measurement across the entire valid VSENSE range, enabling precise measurements at lower load currents.
- Multiple Gain Options: Available in gains of 20 V/V, 50 V/V, 100 V/V, 200 V/V, and 500 V/V to optimize the output dynamic range based on the application.
- Wide Supply Range: Operates with a supply voltage range from 2.7 V to 20 V, supporting a full-scale output voltage range up to V_S.
Applications
- Automotive Systems: Suitable for automotive HVAC compressor modules, interior heater modules, parking heater modules, and pumps.
- Solid-State LiDAR: Used in solid-state LiDAR applications due to its high precision and fast response time.
- Industrial Automation: Applicable in various industrial automation scenarios requiring precise current sensing and high-speed response.
Q & A
- What is the common-mode voltage range of the INA290-Q1?
The INA290-Q1 operates over a common-mode voltage range from 2.7 V to 120 V.
- What are the available gain options for the INA290-Q1?
The INA290-Q1 is available in gains of 20 V/V, 50 V/V, 100 V/V, 200 V/V, and 500 V/V.
- What is the bandwidth of the INA290-Q1 at a gain of 20 V/V?
The bandwidth of the INA290-Q1 at a gain of 20 V/V is 1.1 MHz.
- What is the slew rate of the INA290-Q1?
The slew rate of the INA290-Q1 is 2 V/µs.
- What is the quiescent current of the INA290-Q1?
The quiescent current of the INA290-Q1 is 370 µA (typical).
- What package is the INA290-Q1 available in?
The INA290-Q1 is available in the SC-70 (5-pin) package.
- What are some typical applications of the INA290-Q1?
Typical applications include automotive HVAC compressor modules, interior heater modules, parking heater modules, pumps, and solid-state LiDAR.
- How does the INA290-Q1 handle low VSENSE levels?
The INA290-Q1 enables accurate current measurement across the entire valid VSENSE range, allowing precise measurements at lower load currents.
- What is the offset voltage of the INA290-Q1?
The offset voltage of the INA290-Q1 is ±12 µV (maximum) for A4 and A5 devices.
- How does the INA290-Q1 perform in terms of common-mode rejection ratio (CMRR)?
The INA290-Q1 features a high DC CMRR of 160 dB (typical) and an 85-dB AC CMRR at 50 kHz).
