ADBMS2950BCCSZ datasheet(50/97 Pages) AD

50 / 97 page

ADBMS2950B

Data Sheet

Rev. 0 | Page 50 of 97

BYTE

BIT 7

BIT 6

BIT 5

BIT 4

BIT 3

BIT 2

BIT 1

BIT 0

VB2MUX

VB1MUX

SNAPST

REFUP

COMMBK

ACCI[2:0]

Table 70. CFGA Bit Description

Name

Type

Reset

Value

Description

OCEN

OCxADC Enable.

OC1ADC, OC2ADC, OC3ADC disabled.

OC1ADC, OC2ADC, OC3ADC enabled.

VB1MUX

VB1MUX Input Multiplexer Select. The VB1ADC latches the value of this bit upon receiving an ADI1 command. A change to this bit

must be followed by a new ADI1 command for the ADC behavior to update.

VB1ADC measures VBAT1 vs. SGND.

VB1ADC measures VBAT1 vs. VBAT2.

VB2MUX

VB2MUX Input Multiplexer Select. The VB2ADC latches the value of this bit upon receiving an ADI1 RD = 1 or ADI2 command. A

change to this bit must be followed by a new command for the ADC behavior to update.

VB2ADC measures VBAT2 vs. SGND.

VB2ADC measures VBAT2 vs. VBAT1. Double polarity inversion due to negative LSB of VB2ADC.

ACCI

001

IxACC and VBxACC (I1ACC, I2ACC, VB1ACC, and VB2ACC) register accumulation control. The IxACC, VBxACC registers are updated

every ACCN conversions of IxADC, VBxADC with the sum of ACCN samples; ACCN = 4 × (ACCI + 1). New configuration becomes active

with the next ADI1 or ADI2 command.

000

IxACC, VBxACC accumulate 4 samples.

001

IxACC, VBxACC accumulate 8 samples.

010

IxACC, VBxACC accumulate 12 samples.

011

IxACC, VBxACC accumulate 16 samples.

100

IxACC, VBxACC accumulate 20 samples.

101

IxACC, VBxACC accumulate 24 samples.

110

IxACC, VBxACC accumulate 28 samples.

111

IxACC, VBxACC accumulate 32 samples.

VS1

Reference voltage for V1 measurement.

V1ADC and V2ADC measure V1 vs. SGND.

V1ADC and V2ADC measure V1 vs. VREF1P25.

V1ADC and V2ADC measure V1 vs. V3.

V1ADC and V2ADC measure V1 vs. V4.

VS2

Reference voltage for V2 measurement.

V1ADC and V2ADC measure V2 vs. SGND.

V1ADC and V2ADC measure V2 vs. VREF1P25.

V1ADC and V2ADC measure V2 vs. V3.

V1ADC and V2ADC measure V2 vs. V4.

VS3

Reference voltage for V3 measurement.

V1ADC and V2ADC measure V3 vs. SGND.

V1ADC and V2ADC measure V3 vs. VREF1P25.

VS4

Reference voltage for V4 measurement.

V1ADC and V2ADC measure V4 vs. SGND.

V1ADC and V2ADC measure V4 vs. VREF1P25.

VS5

Reference voltage for V5 measurement.

V1ADC and V2ADC measure V5 vs. SGND.

V1ADC and V2ADC measure V5 vs. VREF1P25.

VS6

Reference voltage for V6 measurement.

V1ADC and V2ADC measure V6 vs. SGND.

V1ADC and V2ADC measure V6 vs. VREF1P25.

VS7

Reference voltage for V7 measurement.

V1ADC measures V7 vs. SGND.

V1ADC measures V7 vs. VREF1P25.

VS8

Reference voltage for V8 measurement.

V1ADC measures V8 vs. SGND.

V1ADC measures V8 vs. VREF1P25.

VS9

Reference voltage for V9 measurement.

V2ADC measures V9 vs. SGND.

V2ADC measures V9 vs. VREF1P25.

VS10

Reference voltage for V10 measurement.

V2ADC measures V10 vs. SGND.

V2ADC measures V10 vs. VREF1P25.

SOAK

000

Delays response of V1ADC and V2ADC to ADV command and further multi-measurements.

000

Soak time disabled.

001

100 µs of soak time.

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