AS3677 datasheet(52/68 Pages) AMSCO

52 / 68 page

www.austriamicrosystems.com/AS3677

1v3-1

51 - 67

AS3677

Datasheet - D e ta i l e d D e s c r i p t i o n

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

sion result for channel 17h selected by register adc_select = 010111):

TJUNCTION [

°C] = ADCTOFFSET - ADCTC · ADCTEMP_CODE

(EQ 1)

ADC Registers

VBAT, CPOUT, RGB1, RGB2, RGB3

0V-5V

4.88mV

VLSB=(2.5/1024)/0.4; internal

resistor divider used

CURR1, CURR2, CURR6

0V-1.0V

2.44mV

VLSB=2.5/1024

Table 88. ADC Parameters

Symbol

Parameter

Condition

Min

Typ

Max

Unit

Resolution

Bit

VIN

Input Voltage Range

VSUPPLY = 2.5V

VSS

see

Table

DNL

Differential Non-

Linearity

± 0.25

LSB

INL

Integral Non-Linearity

± 0.5

LSB

Vos

Input Offset Voltage

± 0.25

LSB

Rin

Input Impedance

100

Cin

Input Capacitance

VSUPPLY

Power Supply Range

± 2%, internally trimmed.

2.5

Idd

Power Supply Current

During conversion only.

286

µA

TTOL

Temperature Sensor

Accuracy

@ 25

°C-10

+10

°C

ADCTOFFSET

ADC temperature

measurement offset

value

375

°C

ADCTC

Code temperature

coefficient

Temperature change per ADC LSB

1.293

°C/

Code

RatioPRESCALE

Ratio of Prescaler

For all low voltage current sinks, CPOUT

and VBAT

0.4

Transient Parameters (2.5V, 25 ºC)

Conversion Time

All signals are internally generated and

triggered by start_conversion

µs

Clock Frequency

1.0

MHz

Settling Time of S&H

µs

Table 89. ADC_MSB result

Addr: 27h

ADC_MSB result

Together with Register 27h, this register contains the results (MSB) of an ADC

cycle.

Bit

Bit Name

Default Access

Description

6:0

adc_result_msb

N/A

ADC results register.

Table 87. ADC Input Ranges, Compliances and Resolution

Channels (Pins)

Input Range

VLSB

Note

AS3677 データシート(PDF) 52 Page - ams AG

AS3677 データシート(HTML) 52 Page - ams AG

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68

データシートダウンロード