AS3543 datasheet(50/92 Pages) AMSCO

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Revision 1.11

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AS3543 3v2

Data Sheet - D e t a i l e d D e s c r i p t i o n - S Y S T E M F u n c t i o n s

10.6

10-Bit ADC

10.6.1 General

This general purpose ADC can be used for measuring several voltages and currents to perform functions like battery

monitor, temperature supervision, button press detection, etc.

10.6.2 Input Sources

10.6.3 Parameter

AVDD27=2.7, TA= 25

C, unless otherwise mentioned

Table 37. ADC10 Input Sources

Source

Range

LSB

Description

BVDD

5.120V

5mV

check main system input voltage

BVDDR

5.120V

5mV

check RTC backup battery voltage

CHGIN

5.120V

5mV

check charger input voltage

CHGOUT

5.120V

5mV

check battery voltage of 4V Li-Ion accumulator

VBUS

5.120V

5mV

check USB input voltage

5.120V

5mV

Source defined by DC_TEST in register 18h

BatTemp

2.048V

2mV

check battery charging temperature

reserved

MICS

2.048V

2mV

check voltage on MICS for remote control or external voltage

measurement

reserved

I_MICS

1.024mA

typ.

2uA

check current of MICS for remote control detection

reserved

VBE_1uA

1.024

1mV

measuring basis-emitter voltage of temperature sense

transistor;

Tj = (674 - ADC10<9:0>) / 2

VBE_2uA

1.024

1mV

measuring basis-emitter voltage of temperature sense

transistor;

Tj = (694 - ADC10<9:0>) / 2

I_CHGact

1.024V

1mV

check active charger current

I_CHGref

1.024V

1mV

check reference charger current

Table 38. ADC10 Parameter

Symbol

Parameter

Condition

Min

Typ

Max

Unit

ADCFS

ADC Full Scale Range

2.16

TCON

Conversion Time

µs

I_MICFS

I_MICS Full Scale Range

0.7

1.0

1.4

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