DS2792 datasheet(5/40 Pages) MAXIM

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DS2792 Programmable Fuel Gauge with UART Interface

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PIN DESCRIPTION

NAME

FUNCTION

1, 7–10,

21, 25,

26, 28

N.C.

No Connection

VIN2

Battery Voltage Sense Input 2. Voltage measurement on VIN2 is

relative to VIN1.

VIN1

Battery Voltage Sense Input 1. Voltage measurement on VIN1 is

relative to AVSS.

Auxiliary ADC Input. Voltage measured ratiometrically with respect

to VB pin voltage or absolutely with respect to internal reference.

TXD

Serial Interface Data Transmit. Maximum of 19200bps.

RXD

Serial Interface Data Recieve. Maximum of 19200bps.

P0.0

Programmable I/O Pin. Alternate functions: external interrupt input

INT0, [JTAG TDI].

P0.1

Programmable I/O Pin. Alternate functions: external interrupt input

INT1, [JTAG TMS].

SNS2

Current-Sense Input. SNS2 attaches to the pack end of current-

sense resistor.

IS2

Current Filter Input 2

IS1

Current Filter Input 1

SNS1

Current-Sense Input. SNS1 attaches to the battery end of current-

sense resistor and VSS.

AVSS

Analog Supply Return Node. AVSS attaches to negative battery

terminal.

VSS

Digital Supply Return Node. VSS attaches to negative battery

terminal.

P0.2

Programmable I/O Pin. Alternate functions: reset input pin

RST.

P0.3

Programmable I/O Pin. Alternate functions: timer/counter input pin

TCK, [JTAG TCK].

P0.4

Programmable I/O Pin. Alternate function: [JTAG TDO]

P0.5

Programmable I/O Pin

Bias Supply Output. Internally regulated to 3.3V. Bypass VB to VSS

with 0.1µF.

VDD

Input Supply. +2.5V to +10.0V input range. Bypass VDD to VSS with

0.1

PF.

—

PAD

Exposed PAD. Not electrically connected to IC. Connect to VSS or

leave floating.

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