MAX1027_09 Datasheet, PDF (14/23 Pages) Maxim Integrated Products – 10-Bit 300ksps ADCs with FIFO, Temp Sensor, Internal Reference

10-Bit 300ksps ADCs with FIFO,
Temp Sensor, Internal Reference
Table 3. Setup Register*
BIT NAME
—
—
CKSEL1
CKSEL0
REFSEL1
REFSEL0
DIFFSEL1
DIFFSEL0
BIT
7 (MSB)
6
5
4
3
2
1
0 (LSB)
FUNCTION
Set to zero to select setup register.
Set to 1 to select setup register.
Clock mode and CNVST configuration. Resets to 1 at power-up.
Clock mode and CNVST configuration.
Reference mode configuration.
Reference mode configuration.
Unipolar/bipolar mode register configuration for differential mode.
Unipolar/bipolar mode register configuration for differential mode.
*See below for bit details.
CKSEL1
0
0
1
1
CKSEL0
0
1
0
1
CONVERSION CLOCK
Internal
Internal
Internal
External (4.8MHz max)
ACQUISITION/SAMPLING
Internally timed
Externally timed through CNVST
Internally timed
Externally timed through SCLK
CNVST CONFIGURATION
CNVST
CNVST
AIN15/11/7
AIN15/11/7
REFSEL1 REFSEL0
0
0
0
1
1
0
1
1
VOLTAGE REFERENCE
Internal
External single ended
Internal
External differential
AutoShutdown
Reference off after scan; need
wake-up delay.
Reference off; no wake-up delay.
Reference always on; no wake-up
delay.
Reference off; no wake-up delay.
REF- CONFIGURATION
AIN14/10/6
AIN14/10/6
AIN14/10/6
REF-
DIFFSEL1 DIFFSEL0
FUNCTION
0
0
No data follows the setup byte. Unipolar mode and bipolar mode registers remain unchanged.
0
1
No data follows the setup byte. Unipolar mode and bipolar mode registers remain unchanged.
1
0
One byte of data follows the setup byte and is written to the unipolar mode register.
1
1
One byte of data follows the setup byte and is written to the bipolar mode register.
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