C11 datasheet(55/72 Pages) AMSOSRAM

55 / 72 page

AS3688

austriami crosyst ems

Datasheet, Confidential

www.austriamicrosystems.com (ptr,tje)

Revision 1.1.1 / 20060707

53 - 70

Table

22 – ADC Parameters

Symbol

Parameter

Min

Typ

Max

Unit

Note

ADCTC

Code temperature

coefficient

1.2939

Code/°C

Temperature change per ADC

LSB

Ratioprescaler

Ratio of Prescaler

0.4

For all low voltage current sinks,

CP_OUT and VBAT2

VGPIOCURR

Voltage Compliance of

current source for GPIO

0.0

1.35

IGPIOCURR

Current Accuracy for

GPIO current source

-1.0µA

1-15µA

+1.0µA

Current Source for pin GPIO2

Transient Parameters (2.5V, 25 ºC)

Conversion Time

µ s

Clock Frequency

1.0

MHz

Settling Time of S&H

µ s

All signal are Internally

generated and triggered by

start_conversion

The junction temperature (TJUNCTION) can be calculated with the following formula (ADCTEMP_CODE is the adc

conversion result for channel 15 selected by register adc_select = 000100b):

TJUNCTION [°C] = ADCTOFFSET - ADCTC * ADCTEMP_CODE

7.7.1 ADC Registers

ADC_control

Addr: 26h

This register input source selection and initialization of ADC.

Bit

Bit Name

Default

Access

Description

5:0

adc_select

R/W

Selects input source as ADC input.

000000 (00h) = GPIO0

000001 (01h) = GPIO1

000010 (02h) = GPIO2

000011 (03h) = GPI

000100 (04h) = reserved

000101 (05h) = RGB1

000110 (06h) = RGB2

000111 (07h) = RGB3

001000 (08h) = CURR1

001001 (09h) = CURR2

001010 (0Ah) = CURR30

001011 (0Bh) = CURR31

001100 (0Ch) = CURR32

001101 (0Dh) = CURR33

001110 (0Eh) = CURR41

001111 (0Fh) = CURR42

010000 (10h) = CURR43

010001 (11h) = reserved

010010 (12h) = reserved

010011 (13h) = reserved

010100 (14h) = VBAT2

010101 (15h) = CP_OUT

010110 (16h) = DCDC_FB

010111 (17h) = ADCTEMP_CODE (junction temperature)

011xxx, 1xxxxx = reserved

start_conversion

N/A

Writing a 1 into this bit starts one ADC conversion cycle.

Notes:

See Table ‘ADC Input Ranges, Compliances and Resolution’ for ADC ranges and possible

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