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LTC1400 Datasheet(PDF) 6 Page - Linear Technology

Part No. LTC1400
Description  Complete SO-8, 12-Bit, 400ksps ADC with Shutdown
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Maker  LINER [Linear Technology]
Homepage  http://www.linear.com
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LTC1400 Datasheet(HTML) 6 Page - Linear Technology

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6
LTC1400
PIN FUNCTIONS
CLK (Pin 6): Clock. This clock synchronizes the serial data
transfer. A minimum CLK pulse of 50ns will cause the ADC
to wake up from Nap or Sleep mode.
CONV (Pin 7): Conversion Start Signal. This active high
signal starts a conversion on its rising edge. Keeping CLK
low and pulsing CONV two/four times will put the ADC into
Nap/Sleep mode.
VSS (Pin 8): Negative Supply. –5V for bipolar operation.
Bypass to GND with 0.1
µF ceramic. VSS should be tied to
GND for unipolar operation.
VCC (Pin 1): Positive Supply, 5V. Bypass to GND (10µF
tantalum in parallel with 0.1
µF ceramic).
AIN (Pin2):AnalogInput.0Vto4.096V(Unipolar), ±2.048V
(Bipolar).
VREF (Pin 3): 2.42V Reference Output. Bypass to GND
(10
µF tantalum in parallel with 0.1µF ceramic).
GND (Pin 4): Ground. GND should be tied directly to an
analog ground plane.
DOUT (Pin 5): The A/D conversion result is shifted out from
this pin.
LTC1400 • TC01
DOUT
DOUT
3k
3k
CLOAD
CLOAD
Hi-Z TO VOH
VOL TO VOH
VOH TO Hi-Z
Hi-Z TO VOL
VOH TO VOL
VOL TO Hi-Z
5V
TEST CIRCUITS
LTC1400 • BD01
12-BIT CAPACITIVE DAC
COMP
SUCCESSIVE APPROXIMATION
REGISTER/PARALLEL TO
SERIAL CONVERTER
ZEROING SWITCH
CONTROL
LOGIC
2.42V REF
DOUT
VCC
CONV
CLK
VREF
AIN
CSAMPLE
12
GND
VSS
FUNCTIONAL BLOCK DIAGRA


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