Datasheet

LTC4222
27
4222fb
Table 7. ADC Register Data Format: ADINn, SOURCEn, SENSEn MSB Bytes – Read/Write*
BIT (7) BIT (6) BIT (5) BIT (4) BIT (3) BIT (2) BIT (1) BIT (0)
Data (9) Data (8) Data (7) Data (6) Data (5) Data (4) Data (3) Data (2)
*Set bit ADC _CONTROL(0) before writing
Table 8. ADC Register Data Format: ADINn, SOURCEn, SENSEn LSB Bytes – Read/Write*
BIT (7) BIT (6) BIT (5) BIT (4) BIT (3) BIT (2) BIT (1) BIT (0)
Data (1) Data (0) Reserved** Reserved** Reserved** Reserved** Reserved** Reserved**
*Set bit ADC _CONTROL(0) before writing
**Read as zero
APPLICATIONS INFORMATION
Table 9. ADC CONTROL Register E – Read/Write
BIT ADC_CONTROL (E4h) OPERATION
7 Reserved Reserved
6 Reserved Reserved
5 ADC Busy Status Bit That is High When the ADC is Converting. Always High in Free-Run Mode, Low When ADC is
Halted or After a Point and Shoot Conversion. Read Only
4 ADC Alert Enables the ALERT Pin to Pull Low When the ADC Finishes a Measurement
3 ADC Channel Address These Bits May Be Written to Cause the ADC to Make a Single Measurement of the Desired Channel
When the Halt Bit is High
FUNCTION SF2-0
SOURCE1 000
SOURCE2 001
ADIN1 010
ADIN2 011
SENSE1 100
SENSE2 101
2
1
0 Halt Stops the Data Converter and Enables Point and Shoot Mode