Rainbow-electronics DS2756 Manual de usuario descargar pdf (Pagina 5)

DS2756: High-Accuracy Battery Fuel Gauge with Programmable Suspend Mode

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Figure 2. Functional Diagram

1-WIRE

INTERFACE

AND

ROM ID

VOLTAGE

REFERENCE

THERMAL

SENSE

ADC

VIN

PRECISION

TIMEBASE

chip ground

SNS

IS2

VSS

IS1

VDD

PIO

BIAS

Low Power

Oscillator

LOCKABLE EEPROM

BLOCKS

SRAM

TEMPERATURE

VOLTAGE

CURRENT

ACCUM. CURRENT

COMPARATORS

STATUS / CONTROL

10KW 10KW

DETAILED PIN DESCRIPTION

Pin Name Description

1 VIN

Battery Voltage-Sense Input. Voltage measurement performed on VIN input and

displayed in Voltage Register.

2 VSS

Device Ground and Current-Sense Resistor Connection. VSS attaches to battery end of

sense resistor.

3 PIO General-Purpose Programmable I/O Pin or Optional Interrupt Output

4 VDD

Input Supply: +3.0V to +5.5V Input Range. Bypass VDD to VSS with 0.1mF.

5 IS1 Current-Sense Filter Input 1

6 IS2 Current-Sense Filter Input 2

7 SNS Sense Resistor Connection. SNS attaches to pack end of current sense resistor.

8 DQ

Serial Interface Data I/O Pin. Bidirection data transmit and receive at 16kbps or 143kbps.

Optional interrupt output.

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Rainbow-electronics DS2756 Manual de usuario Pagina 5

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