AS39513 datasheet(39/108 Pages) AMSCO

39 / 108 page

ams Datasheet

Page 39

[v1-10] 2018-Apr-25

Document Feedback

AS39513 − Detailed Description

ADC Output and Range for Battery Measurement

The battery sensor uses a voltage divider that depends on the

battery type. If the battery type is set to a single cell battery,

the signal voltage is

Where VBAT is the voltage at the VBAT pin.

If the battery type is set to a dual cell battery, the signal voltage

The configuration settings for battery measurement are

V1SET= 3’b000, V2SET=3’b001 mux_gain=00 and gndv1=1

which translates to ADC reference voltages of VRNG=0 and

VLOW=V2=310mV.

ADC Output and Range for External Sensor

Measurement

The external sensor is just a switch to the SEXT pin, so the signal

voltage, VSIG, EXT, is just the voltage at the SEXT pin.

The configuration settings for ext. sensor measurement are

EV1SET= 3'b010, EVSET2= 3'b101 mux_gain=00 and gndv1=0

which translates to ADC reference voltages of VRNG=V1=260mV

and VLOW=V2=510mV. This translates to an SEXT input voltage

range 510 – 760mV typ.

Figure 27:

ADC Input/Output Characteristic for Ext. Sensor Measurement with Default Settings

(EQ8)

VSIG BAT1

VBAT

2.84

--------------

(EQ9)

VSIG BAT2

VBAT

5.51

--------------

Code

1024

510mV

ADC Range:

250mV

760mV

Vin

AS39513 数据表(PDF) 39 Page - ams AG

AS39513 数据表(HTML) 39 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 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

数据表下载