TLC3574_14 Datasheet, PDF (25/50 Pages) Texas Instruments – 14-Bit Resolution for TLC3574/78, 12-Bit for TLC2574/2578

TLC3574, TLC3578, TLC2574, TLC2578
5ĆV ANALOG, 3Ć/5ĆV DIGITAL, 14Ć/12ĆBIT, 200ĆKSPS, 4Ć/8ĆCHANNEL
SERIAL ANALOGĆTOĆDIGITAL CONVERTERS WITH ±10ĆV INPUTS
SLAS262C − OCTOBER 2000 − REVISED MAY 2003
operation cycle timing
CS Initiates
Operation
4 SCLKs
12 SCLKs for Short
44 SCLKs for Long
18 OSC for Internal OSC^‡
72 SCLK for External Clock
15 ns
t_(setup)^†
t_(sample)
SDI 4-bit Command 12-bit CFR Data (Optional)
SDO§ _{14-bit Data (Previous Conversion) 2-bit Don’t Care}
Active CS (FS Is Tied to High)
t_(convert)
t_(overhead)
FS Initiates
Operation
CSTAR (For Extended Sampling) occurs at
or after the rising edge of eleventh SCLK
Delay From CS
Low to FS High _{4 SCLKs}
12 SCLKs for Short
44 SCLKs for Long
18 OSC for Internal OSC^‡
72 SCLK for External Clock 15 nS
t_(delay)^†
t_(setup)^†
t_(sample)
SDI 4-bit Command
12-bit CFR Data (Optional)
SDO§ 14-bit Data (Previous Conversion) _{2-bit Don’t Care}
Active CS (CS Can Be Tied to Low)
t_(convert)
t_(overhead)
Active FS
CSTAR (For Extended Sampling) occurs at
or after the rising edge of eleventh SCLK
† _{Non JEDEC terms used.}
‡ _{18 internal OSC or 72 SCLK for TLC3574 and TLC3578,}
13 internal OSC or 52 SCLK for TLC2574 and TLC2578.
§ _{For TLC3574 and TLC3578, 14-bits are result of previous conversion, last two bits are don’t care. For TLC2574 and TLC2578, 12-bits are result}
of previous conversion, last four bits are don’t care.
WWW.TI.COM
25