MAX11626_1110 Datasheet, PDF (15/22 Pages) Maxim Integrated Products – 12-Bit, 300ksps ADCs with FIFO and Internal Reference

12-Bit, 300ksps ADCs
with FIFO and Internal Reference
Table 3. Setup Register*
BIT NAME BIT
FUNCTION
—
—
CKSEL1
CKSEL0
7 (MSB)
6
5
4
Set to 0 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.
REFSEL1
REFSEL0
3
Reference mode configuration.
2
Reference mode configuration.
—
1
Don’t care.
—
0 (LSB) Don’t care.
*See below for bit details.
CKSEL1 CKSEL0
CONVERSION CLOCK
ACQUISITION/SAMPLING
0
0
0
1
Internal
Internal
Internally timed
Externally timed through CNVST
1
0
Internal
Internally timed
1
1
External (4.8MHz max)
Externally timed through SCLK
*For the MAX11626/MAX11627, CNVST has its own dedicated pin.
CNVST CONFIGURATION
CNVST
CNVST
AIN15/AIN11/AIN7*
AIN15/AIN11/AIN7*
REFSEL1 REFSEL0
0
0
0
1
1
0
1
1
VOLTAGE REFERENCE
Internal
External
Internal
Reserved
AutoShutdown
Reference off after scan; need
wake-up delay.
Reference off; no wake-up delay.
Reference always on; no wake-up
delay.
Reserved. Do not use.
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