MAX11253 Datasheet, PDF (29/51 Pages) Maxim Integrated Products – Longer Battery Life for Portable Applications

MAX11253
16-Bit, 6-Channel, 64ksps, 6.2nV/√Hz PGA,
Delta-Sigma ADC with SPI Interface
Table 6. Maximum Delay Time for Mode Transitions
COMMAND
ISSUED*
MAX11253
STATE BEFORE
COMMAND
RESET
SLEEP
STANDBY
SLEEP
STANDBY (fast)
Calibration
Conversion
CONVERT
STANDBY
RESET
POR
RSTB
SLEEP
STANDBY
RESET
SLEEP
SLEEP (fast)
STANDBY
Calibration
Conversion
RESET
SLEEP
STANDBY
Calibration
Conversion
OFF
Any
COMMAND INTERPRETATION
Command ignored
Command ignored
MAX11253 powers down into SLEEP mode
Issue a conversion command and then monitor
STAT:PDSTAT[1:0] for change of mode; then send
conversion command with MODE[1:0] set to ‘01’
Calibration stops, MAX11253 powers down into
SLEEP mode
Conversion stops, MAX11253 powers down into
SLEEP mode
Mode change from SLEEP to conversion
SAT: PDSTAT changes to ‘00’
STANDBY to conversion
Command ignored
MAX11253 changes to STANDBY
Issue a conversion command and then monitor
STAT:PDSTAT[1:0] for change of mode; then send
conversion command with MODE[1:0] set to ‘01’
Command ignored
Calibration stops
Conversion stops
Command ignored
Command ignored
Register values reset to default
Calibration stops, register values reset to default
Conversion stops, register values reset to default
From complete power-down to STANDBY mode
From any state to STANDBY mode
MAXIMUM
DELAY TIME TO
NEXT STATE^†
0
0
20ms
MAX11253
STATE AFTER
COMMAND
RESET
SLEEP
SLEEP
15µs
SLEEP
3µs
3µs
T_PUPSLP + 3µs
T_PUPSBY + 3µs
0
20ms
85µs
0
3µs
3µs
0
0
28ms
6µs
6µs
10ms
10ms
SLEEP
SLEEP
Conversion
Conversion
RESET
STANDBY
STANDBY
STANDBY
STANDBY
STANDBY
RESET
SLEEP
STANDBY
STANDBY
STANDBY
STANDBY
STANDBY
*The commands are defined as follows:
SLEEP: Set CTRL1:PD[1:0] to ‘01’; issue a conversion command with MODE[1:0] set to ‘01’
STANDBY: Set CTRL1:PD[1:0] to ‘10’; issue a conversion command with MODE[1:0] set to ‘01’
RESET: Set CTRL1:PD[1:0] to ‘11’; issue a conversion command with MODE[1:0] set to ‘01’
CONVERT: Any conversion command with MODE[1:0] set to ‘11’
POR: Power-on reset during initial power-up or UVLO
RSTB: Hardware reset with RSTB pin
†See _{the Electrical Characteristics for TPUPSLP and TPUPSBY}
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