Datasheet

Table 3. Setup Register*

*See below for bit details.

*For the MAX11626/MAX11627, CNVST has its own dedicated pin.

BIT NAME BIT FUNCTION

— 7 (MSB) Set to 0 to select setup register.

— 6 Set to 1 to select setup register.

CKSEL1 5 Clock mode and CNVST conguration. Resets to 1 at power-up.

CKSEL0 4 Clock mode and CNVST conguration.

REFSEL1 3 Reference mode conguration.

REFSEL0 2 Reference mode conguration.

— 1 Don’t care.

— 0 (LSB) Don’t care.

CKSEL1 CKSEL0 CONVERSION CLOCK ACQUISITION/SAMPLING CNVST CONFIGURATION

0 0 Internal Internally timed CNVST

0 1 Internal Externally timed through CNVST CNVST

1 0 Internal Internally timed AIN15/AIN11/AIN7*

1 1 External (4.8MHz max) Externally timed through SCLK AIN15/AIN11/AIN7*

REFSEL1 REFSEL0 VOLTAGE REFERENCE AutoShutdown

0 0 Internal

Reference off after scan; need

wake-up delay.

0 1 External Reference off; no wake-up delay.

1 0 Internal

Reference always on; no wake-up

delay.

1 1 Reserved Reserved. Do not use.

MAX11626–MAX11629/

MAX11632/MAX11633

12-Bit, 300ksps ADCs

with FIFO and Internal Reference

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