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Y2554 View Datasheet(PDF) - Texas Instruments

Part NameDescriptionManufacturer
Y2554 5-V, 12-BIT, 400 KSPS, 4/8 CHANNEL, LOW POWER, SERIAL ANALOG-TO-DIGITAL CONVERTERS WITH AUTO POWER DOWN Texas-Instruments
Texas Instruments Texas-Instruments
Y2554 Datasheet PDF : 50 Pages
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TLC2554, TLC2558
5-V, 12-BIT, 400 KSPS, 4/8 CHANNEL, LOW POWER,
SERIAL ANALOG-TO-DIGITAL CONVERTERS WITH AUTO POWER DOWN
SLAS220A –JUNE 1999
PRINCIPLES OF OPERATION
power down calculations
i(AVERAGE) = (fS /fSMAX ) × i(ON) + (1–fS /fSMAX ) × i(OFF)
CASE 1: If VDD = 3.3 V, auto power down, and an external reference is used:
+ fS
+ fSMAX
+X +X i(ON)
10 kHz
200 kHz
1 mA operating current and i(OFF)
1 mA auto power-down current
+ ) + so
i(AVERAGE) 0.05 1000 mA 0.95 1 mA 51 mA
CASE 2: Now if software power down is used, another cycle is needed to shut it down.
+ fS
+ fSMAX
+X +X i(ON)
20 kHz
200 kHz
1 mA operating current and i(OFF)
1 mA power-down current
+ ) + so
i(AVERAGE) 0.1 1000 mA 0.9 1 mA 101 mA
In reality this will be less since the second conversion never happened. It is only the additional cycle to shut down
the ADC.
34
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
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