AD8675 datasheet(52/60 Pages) AD

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Data Sheet

AD3551R

REGISTERS

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Rev. 0 | 52 of 60

Table 38. Bit Descriptions for CH0_OUTPUT_RANGE

Bits

Bit Name

Settings

Description

Reset

Access

[3:0]

CH0_OUTPUT_RANGE_SEL

Channel 0 Output Range Select. The user can select which voltage

output range is desired.

0x0

R/W

000 0 V to 2.5 V range. Requires RFB1_0 connection.

001 0 V to 5 V range. Requires RFB1_0 connection.

010 0 V to 10 V range. Requires RFB2_0 connection.

011 −5 V to +5 V range. Requires RFB2_0 connection.

100 −10 V to +10 V range. Requires RFB4_0 connection.

Channel 0 Offset Register

Address: 0x1B, Reset: 0x00, Name: CH0_OFFSET

This register configures the dc offset of the Channel 0 DAC. For this value to take effect, the CH0_RANGE_OVERRIDE bit must be set in the

CH0_GAIN register.

Table 39. Bit Descriptions for CH0_OFFSET

Bits

Bit Name

Settings

Description

Reset

Access

[7:0]

CH0_OFFSET

Channel 0 DC Offset.

0x0

R/W

Channel 0 Gain Register

Address: 0x1C, Reset: 0x00, Name: CH0_GAIN

This register enables the configuration of custom span modes, configures the scaling of the PMOS DAC and NMOS DAC current sources, and

controls the polarity of the offset value.

Table 40. Bit Descriptions for CH0_GAIN

Bits

Bit Name

Settings

Description

Reset

Access

CH0_RANGE_OVERRIDE

Channel 0 Range Override. This bit allows the user to override the

preconfigured range settings and manually set offset and gain.

0x0

R/W

0 Use preconfigured range settings.

1 Use custom range settings.

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