AS3687 datasheet(36/55 Pages) AMSCO

36 / 55 page

AS3687/87XM

Datasheet

www.austriamicrosystems.com/AS3687

1v3-4

35 - 54

Table

13 – ADC Input Ranges, Compliances and Resolution

Channels (Pins)

Input Range

VLSB

Note

CURR30-33

VBAT, CP_OUT

0V-5.5V

6.1mV

VLSB=2.5/1024 * 1/0.4;

internal resistor divider used

CURR1, CURR2, CURR6

0V-1.0V

2.44mV

VLSB=2.5/1024

Table

14 – ADC Parameters

Symbol

Parameter

Min

Typ

Max

Unit

Note

Resolution

Bit

Vin

Input Voltage Range

VSS

Vsupply

Vsupply = V2_5

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 (V2_5)

Power Supply Range

2.5

± 2%, internally trimmed.

Idd

Power Supply Current

500

µ A

During conversion only.

Idd

Power Down Current

100

TTOL

Temperature Sensor

Accuracy

-10

+10

°C

@ 25

°C

ADCTOFFSET

ADC temperature

measurement offset value

375

°C

ADCTC

Code temperature

coefficient

1.2939

°C/Code

Temperature change per ADC

LSB

Ratioprescaler

Ratio of Prescaler

0.4

For all low voltage current sinks,

CP_OUT and VBAT

Transient Parameters (2.5V, 25 ºC)

Conversion Time

µs

Clock Frequency

1.0

MHz

Settling Time of S&H

µs

All signals 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 17h selected by register adc_select = 010111b):

TJUNCTION [

°C] = ADCTOFFSET - ADCTC · ADCTEMP_CODE

7.5.1 Application Hint: Extending to ADC input voltage range for CURR1,2,6

Under certain operating conditions, the input voltage range for the ADC input CURR1,2,6 (specified from 0.0V-

1.0V for all operating conditions in table “ADC Input Ranges, Compliances and Resolution” ) can be extended as

follows:

AS3687 数据表(PDF) 36 Page - ams AG

AS3687 数据表(HTML) 36 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

数据表下载