INA280-Q1数据手册TI中文资料规格书

描述 Description

The INA280-Q1 is a current sense amplifier that can measure voltage drops across shunt resistors over a wide common-mode range from 2.7 V to 120 V. It is in a highly space-efficient SC-70 package with a PCB footprint of only 2.0 mm × 2.1 mm. The current measurement accuracy is achieved thanks to the combination of an ultra-low offset voltage of ±150 µV (maximum), a small gain error of ±0.5% (maximum), and a high DC CMRR of 140 dB (typical). The INA280-Q1 is not only designed for DC current measurement, but also for high-speed applications (like fast overcurrent protection, for example) with a high bandwidth of 1.1 MHz (at gain of 20 V/V) and an 85-dB AC CMRR (at 50 kHz).

The INA280-Q1 operates from a single 2.7-V to 20-V supply and draws a 370-µA supply current (typical). The INA280-Q1 available with five gain options: 20 V/V, 50 V/V, 100 V/V, 200 V/V, and 500 V/V. The low offset and drift of the INA280-Q1 enables accurate current sensing over the extended operating temperature range of −40 °C to +125 °C.

特性 Features

• AEC-Q100 qualified for automotive applications:
• Temperature grade 1: –40 °C to +125 °C, TA

• Functional Safety-Capable
• Documentation available to aid functional safety system design

• Wide common-mode voltage:
• Operational voltage: 2.7 V to 120 V
• Survival voltage: −20 V to +122 V

• Excellent CMRR:
• 120-dB DC (minimum)
• 85-dB AC at 50 kHz

• Accuracy
• Gain:
• Gain error: ±0.5% (maximum)
• Gain drift: ±20 ppm/°C (maximum)

• Offset:
• Offset voltage: ±150 µV (maximum)
• Offset drift: ±1 µV/°C (maximum)


• Available gains:
• INA280A1-Q1: 20 V/V
• INA280A2-Q1: 50 V/V
• INA280A3-Q1: 100 V/V
• INA280A4-Q1: 200 V/V
• INA280A5-Q1: 500 V/V

• High bandwidth: 1.1 MHz
• Slew rate: 2 V/µs
• Quiescent current: 370 µA