Overview
The INA290-Q1, specifically the INA290A1QDCKRQ1 model from Texas Instruments, is an ultra-precise current sense amplifier designed for high-accuracy current measurements across a wide range of applications. This device is particularly suited for automotive and industrial environments due to its robust specifications and compact design. The INA290-Q1 operates over a wide common-mode range from 2.7 V to 120 V, making it versatile for various voltage rail conditions. Its ultra-low offset voltage, small gain error, and high common-mode rejection ratio (CMRR) ensure precise current measurements even in challenging environments.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VS) | 2.7 | - | 20 | V |
| Common-Mode Range (VCM) | 2.7 | - | 120 | V |
| Offset Voltage (Vos) | - | - | ±12 µV (A4, A5 devices) | µV |
| Gain Error | - | - | ±0.1% | % |
| 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 | - | 600 | µA |
| Package | - | - | SC-70 (5-pin) | - |
| Operating Temperature | -40 | - | 125 | °C |
Key Features
- Ultra-Precise Current Measurement: Achieved through ultra-low offset voltage (±12 µV maximum), small gain error (±0.1%), and high DC CMRR (160 dB typical).
- Wide Common-Mode Range: Operates from 2.7 V to 120 V, making it suitable for various voltage rail conditions.
- High Bandwidth and Slew Rate: 1.1 MHz bandwidth at a gain of 20 V/V and a slew rate of 2 V/µs, ideal for fast overcurrent protection and high-speed applications.
- 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 output dynamic range based on application requirements.
- Low VSENSE Operation: Accurate current measurement across the entire valid VSENSE range, enabling precise measurements at lower load currents.
- Compact Design: SC-70 package with a small PCB footprint of 2.0 mm × 2.1 mm.
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 times.
- Industrial Automation: Applicable in industrial environments requiring precise current sensing and high reliability.
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 is 1.1 MHz at a gain of 20 V/V).
- What is the slew rate of the INA290-Q1?
The slew rate is 2 V/µs).
- What is the quiescent current of the INA290-Q1?
The quiescent current is 370 µA to 600 µA).
- In what package is the INA290-Q1 available?
The INA290-Q1 is available in the SC-70 package).
- What is the operating temperature range of the INA290-Q1?
The operating temperature range is from -40 °C to +125 °C).
- Can the INA290-Q1 measure low sense voltages accurately?
Yes, the INA290-Q1 can measure low sense voltages accurately across the entire valid VSENSE range due to its zero-drift input architecture).
- Is the INA290-Q1 suitable for high-speed applications?
Yes, the INA290-Q1 is designed for high-speed applications with its high bandwidth and fast slew rate).
- What are some typical applications of the INA290-Q1?
Typical applications include automotive HVAC and heater modules, solid-state LiDAR, and industrial automation).
