AN3395 datasheet(3/11 Pages) STMICROELECTRONICS

部件名	AN3395

功能描述	Sensing resistor selection and usage

PDF	11 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

3 / 11 page

AN3395

STC310x external components

Doc ID 018779 Rev 1

3/11

STC310x external components

Figure 1 illustrates the typical connections for a gas gauge application using the STC3105.

The SDA, SCL and ALM (I/O0 in the STC3100) pins are open drain and require external

pull-up resistors to either system I/O voltage or VCC (pull up to battery voltage). The

components shown in Figure 1 connected to the VCC and VIN pins are used to provide

additional ESD protection and input filtering, please refer to AN3064 for more information.

The resistor (Rcg) connected between the CG and GND pins is the sensing resistor. In

order to obtain higher accuracy, refer to the following application guidelines.

Figure 1.

STC3105 typical connections

VCC

VIN

STC3105

Battery

Rcg

GND

Gnd

System supply

ALM

SDA

SCL

MCU

System I/O supply

Rpu1

Rpu2

Rpu3

AM045291v1

AN3395 数据表(PDF) 3 Page - STMicroelectronics