Overview
The INA280A2IDCKR, produced by Texas Instruments, is a high-precision current sense amplifier designed for high-side current sensing applications. It features a wide common-mode voltage range from 2.7 V to 120 V and is available in a highly space-efficient SC-70 package. This device is optimized for applications requiring accurate current measurement over a broad temperature range of −40°C to +125°C.
The INA280A2IDCKR operates from a single supply voltage of 2.7 V to 20 V and draws a typical quiescent current of 370 µA. It is part of the INA280 family, which offers multiple gain options to suit various application requirements.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operational Voltage Range | 2.7 to 120 | V |
| Survival Voltage Range | −20 to +122 | V |
| DC CMRR | 140 dB (typical) | |
| AC CMRR at 50 kHz | 85 dB | |
| Gain Error | ±0.5% (maximum) | |
| Gain Drift | ±20 ppm/°C (maximum) | |
| Offset Voltage | ±150 µV (maximum) | |
| Offset Drift | ±1 µV/°C (maximum) | |
| Bandwidth (A2 devices, CLOAD = 5 pF) | 1100 kHz | |
| Slew Rate | 2 V/µs | |
| Quiescent Current | 370 µA (typical) | |
| Supply Voltage Range | 2.7 to 20 | V |
| Gain (INA280A2) | 50 V/V |
Key Features
- Wide Common-Mode Voltage Range: Operational from 2.7 V to 120 V and survival up to −20 V to +122 V.
- High CMRR: 140 dB DC CMRR (typical) and 85 dB AC CMRR at 50 kHz.
- High Accuracy: Low offset voltage of ±150 µV and gain error of ±0.5% (maximum).
- Multiple Gain Options: Available in gains of 20 V/V, 50 V/V, 100 V/V, 200 V/V, and 500 V/V.
- High Bandwidth and Slew Rate: Bandwidth of 1.1 MHz and slew rate of 2 V/µs.
- Low Input Bias Current: Typical input bias current of 20 µA.
- Wide Supply Range: Operates from a single supply voltage of 2.7 V to 20 V.
Applications
- Active Antenna Systems (AAS) and Macro Remote Radio Units (RRU): For precise current sensing in telecommunications infrastructure.
- 48-V Rack Servers and Merchant Network & Server Power Supplies: For monitoring and managing power distribution in data centers.
- Test and Measurement Equipment: For accurate current measurement in various testing scenarios.
Q & A
- What is the operational voltage range of the INA280A2IDCKR?
The operational voltage range is from 2.7 V to 120 V.
- What is the typical DC CMRR of the INA280A2IDCKR?
The typical DC CMRR is 140 dB.
- What are the available gain options for the INA280 family?
The available gains are 20 V/V, 50 V/V, 100 V/V, 200 V/V, and 500 V/V.
- What is the bandwidth of the INA280A2IDCKR at a gain of 50 V/V?
The bandwidth is 1100 kHz with a 5 pF load capacitance.
- What is the slew rate of the INA280A2IDCKR?
The slew rate is 2 V/µs.
- What is the typical quiescent current of the INA280A2IDCKR?
The typical quiescent current is 370 µA.
- What is the package type of the INA280A2IDCKR?
The package type is SC-70.
- What are some common applications of the INA280A2IDCKR?
Common applications include active antenna systems, macro remote radio units, 48-V rack servers, and test and measurement equipment.
- How does the INA280A2IDCKR handle negative differential input voltage?
The device is designed for unidirectional operation and may enter an overload condition if a negative differential input voltage is applied, requiring recovery time once the voltage returns positive.
- What is the temperature range for the INA280A2IDCKR?
The device operates over a temperature range of −40°C to +125°C.
