LTC1417C Просмотр технического описания (PDF) - Linear Technology
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LTC1417C Datasheet PDF : 32 Pages
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LTC1417
PIN FUNCTIONS
CONVST (Pin 13): Conversion Start Signal. This active
low signal starts a conversion on its falling edge.
BUSY (Pin 14): The BUSY output shows the converter
status. It is low when a conversion is in progress.
VSS (Pin 15): Negative Supply, –5V for Bipolar Operation.
Bypass to AGND using 10µF tantalum in parallel with
0.1µF ceramic. Analog ground for unipolar operation.
VDD (Pin 16): 5V Positive Supply. Bypass to AGND with
10µF tantalum in parallel with 0.1µF ceramic.
TEST CIRCUITS
Load Circuits for Access Timing
DOUT
1k
CL
DGND
A) HI-Z TO VOH AND VOL TO VOH
5V
1k
DOUT
CL
DGND
B) HI-Z TO VOL AND VOH TO VOL
1417 TC01
W
FUNCTIONAL BLOCK DIAGRA
Load Circuits for Output Float Delay
DOUT
1k
30pF
DOUT
5V
1k
30pF
A) VOH TO HI-Z
B) VOL TO HI-Z
1417 TC02
AIN+ 1
AIN– 2
VREF 3
8k
2.5V REF
REF AMP
REFCOMP 4
(4.096V)
AGND 5
10
DGND
INTERNAL
CLOCK
MUX
6
EXTCLKIN
CSAMPLE
CSAMPLE
ZEROING SWITCHES
16
VDD
15 VSS
(0V FOR UNIPOLAR MODE
–5V FOR BIPOLAR MODE)
14-BIT CAPACITIVE DAC
+
COMP
–
SUCCESSIVE APPROXIMATION
REGISTER
CONTROL LOGIC
14
SHIFT REGISTER
9
DOUT
7
SCLK
11
13
12
8
14
SHDN CONVST RD CLKOUT BUSY
1417 BD
8
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