INA225

現行

具四接腳可選增益設定的 36V 雙向電流感測放大器

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產品規格表

document-pdfAcrobat INA225 36-V, Programmable-Gain, Voltage-Output, Bidirectional, Zero-Drift Series, Current-Shunt Monitor datasheet (Rev. A) (英文) PDF | HTML

INA225

現行

產品規格表

立即訂購

產品詳細資料

Product type

Analog output

Common-mode voltage (max) (V)

36

Common-mode voltage (min) (V)

0

Input offset (±) (max) (µV)

150

Input offset drift (±) (typ) (µV/°C)

0.1

Features

Bidirectional, Low-side Capable, Programmable Gain

Rating

Catalog

Voltage gain (V/V)

25, 50, 100, 200

CMRR (min) (dB)

95

Bandwidth (kHz)

70, 125, 200, 250

Iq (max) (mA)

0.35

Number of channels

1

Comparators (#)

0

Gain error (%)

0.05, 0.1, 0.15

Gain error drift (±) (max) (ppm/°C)

10

Slew rate (V/µs)

0.4

Operating temperature range (°C)

-40 to 125

Product type

Analog output

Common-mode voltage (max) (V)

36

Common-mode voltage (min) (V)

0

Input offset (±) (max) (µV)

150

Input offset drift (±) (typ) (µV/°C)

0.1

Features

Bidirectional, Low-side Capable, Programmable Gain

Rating

Catalog

Voltage gain (V/V)

25, 50, 100, 200

CMRR (min) (dB)

95

Bandwidth (kHz)

70, 125, 200, 250

Iq (max) (mA)

0.35

Number of channels

1

Comparators (#)

0

Gain error (%)

0.05, 0.1, 0.15

Gain error drift (±) (max) (ppm/°C)

10

Slew rate (V/µs)

0.4

Operating temperature range (°C)

-40 to 125

VSSOP (DGK)

8

14.7 mm² (3 mm × 4.9 mm)

Wide Common-Mode Range: 0 V to 36 V
Offset Voltage: ±150 µV (Max, All Gains)
Offset Voltage Drift: 0.5 µV/°C (Max)
Gain Accuracy, Over Temperature (Max):
- 25 V/V, 50 V/V: ±0.15%
- 100 V/V: ±0.2%
- 200 V/V: ±0.3%
- 10-ppm/°C Gain Drift
250-kHz Bandwidth (Gain = 25 V/V)
Programmable Gains:
- G1 = 25 V/V
- G2 = 50 V/V
- G3 = 100 V/V
- G4 = 200 V/V
Quiescent Current: 350 µA (Max)
Package: MSOP-8

Wide Common-Mode Range: 0 V to 36 V
Offset Voltage: ±150 µV (Max, All Gains)
Offset Voltage Drift: 0.5 µV/°C (Max)
Gain Accuracy, Over Temperature (Max):
- 25 V/V, 50 V/V: ±0.15%
- 100 V/V: ±0.2%
- 200 V/V: ±0.3%
- 10-ppm/°C Gain Drift
250-kHz Bandwidth (Gain = 25 V/V)
Programmable Gains:
- G1 = 25 V/V
- G2 = 50 V/V
- G3 = 100 V/V
- G4 = 200 V/V
Quiescent Current: 350 µA (Max)
Package: MSOP-8

The INA225 is a voltage-output, current-sense amplifier that senses drops across current-sensing resistors at common-mode voltages that can vary from 0 V to 36 V, independent of the supply voltage. The device is a bidirectional, current-shunt monitor that allows an external reference to be used to measure current flowing in both directions across a current-sensing resistor.

Four discrete gain levels are selectable using the two gain-select terminals (GS0 and GS1) to program gains of 25 V/V, 50 V/V, 100 V/V, and 200 V/V. The low-offset, zero-drift architecture and precision gain values enable current-sensing with maximum drops across the shunt as low as 10 mV of full-scale while maintaining very high accuracy measurements over the entire operating temperature range.

The device operates from a single +2.7-V to +36-V power supply, drawing a maximum of 350 µA of supply current. The device is specified over the extended operating temperature range (–40°C to +125°C), and is offered in an MSOP-8 package.

The INA225 is a voltage-output, current-sense amplifier that senses drops across current-sensing resistors at common-mode voltages that can vary from 0 V to 36 V, independent of the supply voltage. The device is a bidirectional, current-shunt monitor that allows an external reference to be used to measure current flowing in both directions across a current-sensing resistor.

Four discrete gain levels are selectable using the two gain-select terminals (GS0 and GS1) to program gains of 25 V/V, 50 V/V, 100 V/V, and 200 V/V. The low-offset, zero-drift architecture and precision gain values enable current-sensing with maximum drops across the shunt as low as 10 mV of full-scale while maintaining very high accuracy measurements over the entire operating temperature range.

The device operates from a single +2.7-V to +36-V power supply, drawing a maximum of 350 µA of supply current. The device is specified over the extended operating temperature range (–40°C to +125°C), and is offered in an MSOP-8 package.

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重要文件	類型	標題	格式選項	日期
*	資料表	INA225 36-V, Programmable-Gain, Voltage-Output, Bidirectional, Zero-Drift Series, Current-Shunt Monitor datasheet (Rev. A)	PDF \| HTML	2014/3/11
	應用說明	Using a PCB Copper Trace as a Current Sense Shunt Resistor (Rev. A)	PDF \| HTML	2026/4/27
	應用說明	Risks and Prevention of ESD, EOS, and Latch Up Events for Current Sense Amplifiers	PDF \| HTML	2024/11/18
	Application brief	Current Sensing Applications in Communication Infrastructure Equipment (Rev. C)	PDF \| HTML	2023/8/8
	Application brief	Precision Current Measurements on High-Voltage Power-Supply Rails (Rev. F)	PDF \| HTML	2022/10/17
	選擇指南	Current Sense Amplifiers (Rev. E)		2021/9/20
	Application brief	High-Side Motor Current Monitoring for Over-Current Protection (Rev. B)	PDF \| HTML	2021/2/23
	Application brief	Precision, Low-Side Current Measurement (Rev. B)		2019/3/6
	Application brief	External current sense amps vs integrated onboard amplifiers for current sensing (Rev. B)		2019/2/19
	技術文章	How to detect insulation failures in electrical equipment – part 2	PDF \| HTML	2016/5/2
	技術文章	How to get started with current sense amplifiers – part 1	PDF \| HTML	2015/5/19

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開發板

INA225EVM — 適用於 36-V 可編程增益、電流分流監控器的 INA225 評估模組

INA225 是一款電壓輸出電流分流監視器，可在 0V 至 36V 的共模電壓下感測分流壓降，且不受供應電壓影響。可使用兩個外部增益選擇針腳 GS0 和 GS1 選擇四個增益版本。這些針腳允許選擇 25、50、100 和 200 的增益。低偏移零飄移架構使分流器兩端的壓降在全刻度僅 10mV 的情況下，仍可進行電流感測，同時保持高準確度的測量結果。INA225EVM 是一個評估平台，用於在各種訊號、分流器與電源供應條件下，評估 INA225 的性能。本文件提供 INA225EVM 的一般概述，並針對使用此評估模組時需要考慮的特性與功能，提供一般性說明。

使用指南: PDF

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