AS3525 datasheet(165/194 Pages) AMSCO

165 / 194 page

AS3525-A/-B C22O22

Data Sheet, Confidential

www.austriamicrosystems.com

Revision 1.13

165

- 194

7.4.20.4 Parameter

Table 153 ADC10 Parameter

Symbol

Parameter

Notes

Min

Typ

Max

Unit

RDIV

Input Divider Resistance

CHG_OUT, RTCSUP, VBUS, CHG_IN,

VBAT

138k

180k

234k

ADCFS

ADC Full Scale Range

2.534

2.56

2.586

Ratio1

Divition Factor 1

CHG_OUT, RTCSUP, VBUS, CHG_IN

0.198

0.2

0.202

Ratio2

Divition Factor 2

VBAT

0.396

0.4

0.404

Gain

ADC Gain Stage

2.475

2.5

2.525

TCON

Conversion Time

µs

I_MICFS

I_MicSup1/2 Full Scale Range

0.7

1.0

1.4

BVDD=3.6V; Tamb=25ºC; unless otherwise specified

7.4.20.5 Register Description

Table 154 ADC10 Related Register

Name

Base

Offset

Description

IRQ_ENRD_2

I2C audio master

0x27

Interrupt settings for end of conversion interrupt

Table 155 ADC_0 Register

Name

Base

Default

ADC_0

I2C audio master

0000 00xx

First 10-bit ADC Register

Offset: 0x2E

Writing to this register will start the measurement of the selected source.

This register is reset at a DVDD-POR, exception are bit 8 and 9.

Bit

Bit Name

Default

Access

Bit Description

7:4

ADC_Source

00000000

R/W

Selects ADC input source

0000: CHG_OUT

0001: RTCSUP

0010: VBUS

0011: CHG_IN

0100: CVDD

0101: BatTemp

0110: MicSup1

0111: MicSup2

1000: VBE_1uA

1001: VBE_2uA

1010: I_MicSup1

1011: I_MicSup2

1100: VBAT

1101: reserved

1110: reserved

1101: reserved

3:2

n/a

do not change

1:0

ADC<9:8>

R/W

ADC result bit 9 to 8

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