Datasheet LTC1414 (Analog Devices) - 6

LTC1414
U U U PIN FUNCTIONS BUSY (Pin 25):
The BUSY Output Shows the Converter
AGND (Pin 27):
Analog Ground. Status. It is low when a conversion is in progress.
AVDD (Pin 28):
5V Positive Supply. Bypass to AGND with
VSS (Pin 26):
–5V Negative Supply. Bypass to AGND with 10µF ceramic or 10µF tantalum in parallel with 0.1µF 10µF ceramic or 10µF tantalum in parallel with 0.1µF ceramic. ceramic.
U U W FUNCTIONAL BLOCK DIAGRA
CSAMPLE A + IN AVDD CSAMPLE DVDD A – IN 2k V ZEROING SWITCHES SS VREF 2.5V REF + REF AMP 14-BIT CAPACITIVE DAC COMP – REFCOMP OVDD (4.06V) 14 SUCCESSIVE APPROXIMATION OUTPUT • D13 • REGISTER LATCHES • D0 AGND OGND INTERNAL CONTROL LOGIC DGND CLOCK 1414 BD CONVST BUSY
W U W TI I G DIAGRA
tCONV t4 t5 CONVST t1 t3 BUSY t2 DATA (N – 1) DATA N DATA (N + 1) DATA DB13 TO DB0 DB13 TO DB0 DB13 TO DB0 1414 TD 6