SP574B Datasheet, PDF (1/15 Pages) Sipex Corporation – 12-Bit Sampling A/D Converters

®
SP574B/674B/1674B/774B
12–Bit Sampling A/D Converters
s Complete Monolithic 12–Bit A/D Converters
with Sample–Hold, Reference, Clock and Tri–
state Outputs
s Full Nyquist Sampling at All Sample Rates
s Choice of Sampling Rates — 40kHz, 66kHz,
100kHz or 125kHz
s Low Power Dissipation — 110mW
s 12–Bit Linearity Over Temperature
s Commercial, Industrial and Military Tempera-
ture Ranges
s Next–GenerationReplacement for574A,674A,
1674A, 774A Devices
DESCRIPTION…
The SP574B/674B/1674B/774B (SPx74B) Series are complete 12–bit successive–approxi-
mation A/D converters integrated on a single die with tri-state output latches, an internal
reference, clock and a sample–hold. The new “B–Series” features true Nyquist sampling while
maintaining compatibility with prior versions. They are drop–in replacements for the older 574A/
674A/1674A/774A type devices.
STS DB11 DB10 DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 DGND
28
27
26
25
24
23 22
21
20
19
18
17
16
15
NIBBLE A
NIBBLE B
THREE–STATE BUFFERS AND CONTROL
NIBBLE C
12–BIT SAR
OSC
COMP
12–BIT
CAPACITANCE
DAC
CONTROL LOGIC
REF
OFFSET/GAIN
TRIM
7.5K _15K
7.5K 15K
N/C
7.5K
1
2
3
4
5
6
7
8
9
10
11
12
13
14
VLOGIC 12/8 CS
A0 R/C CE VCC REF AGND REF VEE BIP 10V 20V
OUT
IN
OFF IN
IN
SP574B/674B/1674B/774B
12–Bit Sampling A/D Converters
1
© Copyright 2000 Sipex Corporation