LT6236 datasheet(40/50 Pages) LINER

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LTC2372-16

237216f

For more information www.linear.com/LTC2372-16

Sleep Mode

TheLTC2372-16automaticallynapsonceaconversionhas

completed. Only the ADC core powers down in nap mode.

As a result, the auto nap feature provides limited power

savings.Toobtaingreaterpowersavings,theLTC2372-16

provides a sleep mode. During sleep mode, the entire part

ispowereddownexceptforasmallstandbycurrentresult-

ing in a 300μW power dissipation. To enter sleep mode,

toggle CNV twice with no intervening rising edge on SCK

as shown in Figure 28. The part will enter sleep mode on

the falling edge of BUSY from the last conversion initi-

ated. Once in sleep mode, a rising edge on SCK will wake

the part up. Upon emerging from sleep mode, wait tWAKE

ms before initiating a conversion to allow the reference

and reference buffer to wake-up and charge the bypass

capacitors at REFIN and REFBUF. The serial data I/O bus

is enabled or disabled by RDL during sleep mode. Sleep

mode does not affect the state of the sequencer memory

or memory pointer.

TiMing DiagraMs

Figure 28. Sleep Mode Timing Diagram

CNV

RDL = DON’T CARE

SDI = DON’T CARE

BUSY

SCK

tCNVH

tCONV

tHOLD

CONVERT

NAP

SLEEP

tBUSYLH

CONVERT

NAP

tCONV

ACQUIRE

tACQ

237218 F28

CNV

RDL = DON’T CARE

SDI = DON’T CARE

BUSY

SCK

tCNVH

tCONV

CONVERT

SLEEP

tBUSYLH

CONVERT

NAP

tWAKE

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