Datasheet

COMMAND
ISSUED
COMMAND-
ISSUED VIA
STATE
BEFORE
COMMAND
STATE
AFTER
COMMAND
TRANSITION
TIME (MAX)
COMMAND INTERPRETATION AND
RESULTING CHIP STATE
SYNC SPI, PIN
STBY STBY — SYNC ignored, chip remains in STBY mode
Calibration Calibration — SYNC ignored
Conversion Conversion — Pulse SYNC mode, conversions restart
Conversion Conversion —
Continuous SYNC mode, 1
st
SYNC rising
edge set clock counter, subsequent rising
edges are compared against clock counter.
If count is off by more than ±1 clock counts
then restart conversions otherwise do nothing
and continue conversions in progress. If a
SYNC rising edge occurs before the rst
RDYB asserts after conversions are started
then SYNC is ignored. Once the rst RDYB
asserts, all subsequent SYNC rising edges
are evaluated.
CMD Register
Write
SPI
STBY STBY — Chip remains in standby
SLEEP SLEEP — Chip remains in SLEEP
Calibration STBY — Calibration stops, chip goes to STBY mode
Conversion STBY — Conversion stops, chip goes to STBY mode
Convert
Command
Write
SPI
STBY Conversion — Exit standby, conversion starts
SLEEP (SPI) Conversion — Exit SLEEP mode, conversion starts
Calibration Conversion — Calibration stops then a new conversion starts
Conversion Conversion — Conversion stops and a new conversion starts
Table 5. MAX11270 Command Behavior from Pin (RSTB, SYNC) and SPI (RESET, SYNC_SPI)
(continued)
MAX11270 24-Bit, 10mW, 130dB SNR, 64ksps Delta-Sigma
ADC with Integrated PGA
www.maximintegrated.com
Maxim Integrated │ 23