Overview
The INA290A3IDCKR, produced by Texas Instruments, is part of the INAx290 family of ultra-precise current-sense amplifiers. These devices are designed to measure voltage drops across shunt resistors over a wide common-mode range from 2.7 V to 120 V. The INA290A3IDCKR is a single-channel version, featured in the SC-70 package, making it highly space-efficient. It operates from a single 2.7-V to 20-V supply and is optimized for both DC current measurement and high-speed applications such as fast overcurrent protection.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Supply Voltage (VS) | 2.7 | - | 20 | V |
| Common-Mode Voltage Range | 2.7 | - | 120 | V |
| Input Offset Voltage | - | - | ±12 µV | µV |
| Gain Error | - | - | ±0.1% | % |
| DC Common-Mode Rejection Ratio (CMRR) | 140 | 160 | - | dB |
| AC Common-Mode Rejection Ratio (CMRR) at 50 kHz | - | 85 | - | dB |
| Bandwidth (at gain of 20 V/V) | - | 1.1 MHz | - | MHz |
| Quiescent Current per Channel | 370 | - | 500 | µA |
| Operating Temperature Range | -40 | - | 125 | °C |
| Package Type | - | - | SC-70 (5-pin) | - |
Key Features
- Wide Common-Mode Range: Operational voltage from 2.7 V to 120 V, and survival voltage from -20 V to +122 V.
- Precision Zero-Drift Topology: Ultra-low offset voltage of ±12 µV (maximum) and a small gain error of ±0.1% (maximum).
- High Common-Mode Rejection Ratio (CMRR): 160 dB DC CMRR and 85 dB AC CMRR at 50 kHz.
- High Bandwidth and Fast Slew Rate: 1.1 MHz bandwidth at a gain of 20 V/V and a slew rate of 2 V/µs.
- Multiple Gain Options: Available with five gain options: 20 V/V, 50 V/V, 100 V/V, 200 V/V, and 500 V/V.
- Low Power Consumption: Quiescent current of 370 µA per channel (typical).
- Space-Efficient Packaging: Available in SC-70 (5-pin) package.
Applications
- Server and Network Power Supplies: Suitable for 48-V power supplies in server and network applications.
- Test and Measurement Equipment: Used in SAR ADCs and other precision measurement devices.
- Fast Overcurrent Protection: Ideal for high-speed applications requiring rapid current sensing and protection.
- Automotive and Industrial Systems: Applicable in various automotive and industrial systems requiring precise current measurement.
Q & A
- What is the common-mode voltage range of the INA290A3IDCKR?
The INA290A3IDCKR operates over a common-mode voltage range from 2.7 V to 120 V.
- What are the gain options available for the INA290A3IDCKR?
The device is available with five gain options: 20 V/V, 50 V/V, 100 V/V, 200 V/V, and 500 V/V.
- What is the typical quiescent current of the INA290A3IDCKR?
The typical quiescent current per channel is 370 µA.
- What is the bandwidth of the INA290A3IDCKR at a gain of 20 V/V?
The bandwidth at a gain of 20 V/V is 1.1 MHz.
- What is the DC CMRR of the INA290A3IDCKR?
The DC CMRR is 160 dB (typical).
- What is the operating temperature range of the INA290A3IDCKR?
The operating temperature range is from -40°C to +125°C.
- What package type is the INA290A3IDCKR available in?
The device is available in the SC-70 (5-pin) package.
- What are some typical applications of the INA290A3IDCKR?
Typical applications include server and network power supplies, test and measurement equipment, and fast overcurrent protection systems.
- How does the zero-drift architecture benefit the INA290A3IDCKR?
The zero-drift architecture enables ultra-low offset voltage and allows for current sensing with low ohmic shunts.
- What is the slew rate of the INA290A3IDCKR?
The slew rate is 2 V/µs.
