Datasheet > SGM8194

SGM8194

更新时间： 2024-03-03 10:10:22

品牌	Logo	应用领域
圣邦微 - SGMICRO		/
页数	文件大小	规格书
7页	505K
描述
Bidirectional, Low Power, Zero-Drift, Precision Current-Sense Amplifier

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SGM8194 数据手册

SGM8194

Bidirectional, Low Power, Zero-Drift,

Precision Current-Sense Amplifier

GENERAL DESCRIPTION

FEATURES

The SGM8194 series is a low power, high DC and AC

CMRR, voltage output current-sense amplifier. This

device is designed to provide optimal performance in

battery management systems requiring over-current

protection and precision current measurement. The

SGM8194 can sense voltage drops across current-

sense resistor with common mode voltage from -0.1V

to 40V. The common mode voltage is independent with

the power supply voltage due to its AC coupling and

related signal sampling structure.

● Operating Power Supply Range: 2.1V to 5.5V

● Common Mode Voltage Range: -0.1V to 40V

● CMRR: 150dB (TYP)

● Low Offset Voltage: ±50μV (MAX)

● Low Bias Current: 0.5nA (TYP)

● Supply Current: 60μA (TYP)

● Shutdown Current: 10nA (TYP)

● Choice of Gains:

 SGM8194C3 Gain: 100V/V

 SGM8194A3 Gain: 100V/V

 SGM8194A4 Gain: 200V/V

● Gain Error:

The SGM8194 features low input bias current, low

offset voltage and zero-drift. The dynamic range is

extended due to the latter two features when measuring

current. Larger current-sense resistor can be used in

mA level measurement application and it provides

accurate current measurements. Small current-sense

resistor is always used to reduce power loss in power

efficiency sensitive systems. The SGM8194 can provide

accurate current measurements in system where small

current-sense resistor is used.

 ±0.4% (MAX) for SC70-6 Package

 ±0.45% (MAX) for UTQFN-1.8×1.4-10L Package

● Supports Bidirectional Current Sense

● -40℃ to +125℃ Operating Temperature Range

● Available in Green UTQFN-1.8×1.4-10L and SC70-6

Packages

APPLICATIONS

The SGM8194 series provides two fixed gains: 100V/V

and 200V/V. It operates with a single power supply from

2.1V to 5.5V. When this device is enabled, it draws a

60μA typical power supply current, and it consumes only

10nA when disabled.

Battery Fuel Gauge

Notebook PC

Tablet PC

The SGM8194 is available in Green UTQFN-1.8×1.4-10L

and SC70-6 packages. It is rated over the -40℃ to

+125℃ temperature range.

TYPICAL APPLICATION

V_CC

Enable Control

C_BYPASS

0.1μF

V_BAT

ENABLE ⁽¹⁾

IN+

V_CC

SGM8194

GND

REF

D₁

R₁

R_SENSE

OUT

ADC

Microcontroller

IN-

Load

D₂

NOTE: 1. Only for UTQFN-1.8×1.4-10L package.

Figure 1. Typical Application Circuit for Battery-Powered System

SG Micro Corp

NOVEMBER 2023 – REV. A. 2

www.sg-micro.com

12 3 4 5 6 7

中文翻译

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与SGM8194相关器件

型号	品牌	获取价格	描述	数据表
SGM8197	SGMICRO	获取价格	High-Side Current-Sense Amplifier with Open-Drain Comparator and Reference
SGM8197A0	SGMICRO	获取价格	High-Side Current-Sense Amplifier with Open-Drain Comparator and Reference
SGM8197A1	SGMICRO	获取价格	High-Side Current-Sense Amplifier with Open-Drain Comparator and Reference
SGM8197A2	SGMICRO	获取价格	High-Side Current-Sense Amplifier with Open-Drain Comparator and Reference
SGM8197A3	SGMICRO	获取价格	High-Side Current-Sense Amplifier with Open-Drain Comparator and Reference
SGM8198	SGMICRO	获取价格	High-side Measurement Current Shunt Monitor
SGM8199A0	SGMICRO	获取价格	Voltage Output, High-side or Low-side Measurement, Bidirectional Current Shunt Monitor
SGM8199A1	SGMICRO	获取价格	Voltage Output, High-side or Low-side Measurement, Bidirectional Current Shunt Monitor
SGM8199A2	SGMICRO	获取价格	Voltage Output, High-side or Low-side Measurement, Bidirectional Current Shunt Monitor
SGM8199L1	SGMICRO	获取价格	Voltage Output, High-side or Low-side Measurement, Bidirectional Current Shunt Monitor

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