with Sample鈥揌old, Reference, Clock and Tri鈥?/div>
state Outputs
Full Nyquist Sampling at All Sample Rates
Choice of Sampling Rates 鈥?40kHz, 66kHz,
100kHz or 125kHz
Low Power Dissipation 鈥?110mW
12鈥揃it Linearity Over Temperature
Commercial, Industrial and Military Tempera-
ture Ranges
Next鈥揋eneration Replacement for 574A, 674A,
1674A, 774A Devices
s
s
s
s
s
s
DESCRIPTION鈥?/div>
The
SP574B/674B/1674B/774B (SPx74B) Series
are complete 12鈥揵it successive鈥揳pproxi-
mation A/D converters integrated on a single die with tri-state output latches, an internal
reference, clock and a sample鈥揾old. The new 鈥淏鈥揝eries鈥?features true Nyquist sampling while
maintaining compatibility with prior versions. They are drop鈥搃n replacements for the older 574A/
674A/1674A/774A type devices.
STS
28
DB11
27
DB10
26
DB9
25
DB8
24
DB7
23
DB6
22
DB5
21
DB4
20
DB3
19
DB2
18
DB1
17
DB0
16
DGND
15
NIBBLE A
NIBBLE B
THREE鈥揝TATE BUFFERS AND CONTROL
NIBBLE C
12鈥揃IT SAR
OSC
COMP
12鈥揃IT
CAPACITANCE
DAC
OFFSET/GAIN
TRIM
CONTROL LOGIC
REF
7.5K
15K
7.5K
7.5K
12
13
14
15K
N/C
1
2
3
4
5
6
7
8
9
10
11
VLOGIC
12/8
CS
A0
R/C
CE
VCC
REF
OUT
AGND
REF
IN
VEE
BIP
OFF
10V
IN
20V
IN
SP574B/674B/1674B/774B
12鈥揃it Sampling A/D Converters
漏 Copyright 2000 Sipex Corporation
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