ISL26102 Datasheet, PDF (18/21 Pages) Intersil Corporation – Low-Noise 24-bit Delta Sigma ADC

ISL26102, ISL26104
OPERATION
Set Channel Pointer
Set PGA Gain Setting
Set Mux Selection
Set Data Rate
Start Continuous
Conversions
Perform Offset
Calibration
Set Mux Selection
TABLE 7. EXAMPLE COMMAND SEQUENCE
REGISTER
Channel Pointer
PGA Gain
ADDRESS
(WRITE)
88h
97h
Input Mux Selection 87h
OWR
85h
Conversion Control
84h
Conversion Control
84h
Input Mux Selection 87h
DATA
01h
06h
00h
11h
02h
04h
01h
COMMENTS
Set to select channel 2 (AIN2+, AIN2-)
Sets PGA gain to 64x. This PGA gain is applied to the signal channel pointed
to by the Channel Pointer set above.
Mux selection determines which channel is connected to the ADC. This step
selects mux input 1 (AIN1+, AIN1-).
Sets output word rate to 1kSps. See Table 3 for other data rate options.
Set bits (b1-b0) of the Conversion Control register to ‘10’ to start continuous
conversions.
Set bit (b2) of the Conversion Control register to 1 to initiate an offset
calibration of the PGA gain setting selected above. Note that bit (b3) will return
to 0 when the calibration is completed.
Mux selection determines which channel is connected to the ADC. This step
selects mux input 2 (AIN2+, AIN2-).
18
FN7608.0
October 12, 2012