Data Sheet

ADL5309

SERIAL PORT INTERFACE

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Rev. 0 | 21 of 25

Table 8. ADL5309 ADC Register Details

Address Name

Bits

Field Name

Description

Default

Access

0x04

REG_04

4

ADC_BUSY

Equals '1' if a conversion is in progress. REG_05 and REG_06 always contain the

result of the last completed conversion.

0x0

R

[3:0]

MUX_CTRL

Selects the ADC input stream(s) to digitize by setting the corresponding bit to '1', as

follows:

►

Bit 0: digital thermometer

►

Bit 1: VOUT of Channel 1

►

Bit 2: VOUT of Channel 2

►

Bit 3: ADCREF Test Input

The ADC cycles sequentially through all active input streams, taking one 14-bit sample

for each at a time.

0x0

R/W

0x05

REG_05

[5:0]

ADC_DATA[13:8]

MSB of ADC data

0x00

R

0x06

REG_06

[7:0]

ADC_DATA[7:0]

LSB of ADC data

0x00

R

0x08

REG_08

[5:0]

ADC_CONF

ADC dither configuration register as follows:

►

Write 0x1F to enable 32-bit dither

►

Write 0x2F to enable 64-bit dither

►

Write 0x3F to enable both 32-bit and 64-bit dither

►

Write 0x03 to disable dither

0x03

R/W

0x07

REG_07

[3:0]

AD-

CREF_MUX_SEL

ADCREF MUX select. To use ADCREF input, set this to 0x3.

0x0

R/W

0x09

REG_09

1

ADC_RESET

Setting this bit to '1' restarts the A/D conversion.

0x0

R/W

0

ADC_ENABLE

ADC is enabled when set to '1'.

0x1

R/W

0x0A

REG_0A

[4:3]

ADCREF_PIN_SEL ADCREF PIN select. To use ADCREF input, set this to 0x1.

0x0

R/W