HS574A/SP674A
12–Bit Sampling A/D Converters
■ Complete12–bitA/DConverterswithSample–
Hold, Reference, Clock and Tri–state Outputs
■ Low Power Dissipation — 110mW Maximum
■ 12–Bit Linearity Over Temperature
■ Fast Conversion time:
25µs Max (HS574A)
15µs Max (SP674A)
■ Monolithic Construction
DESCRIPTION…
The HS574A/SP674A Series are complete 12–bit successive–approximation A/D converters
integrated on a single die with tri-state output latches, an internal reference, clock and a sample–
hold. They feature 12–bit linearity over temperature, low power dissipation and fast conversion
time. They are available in commercial and military temperature ranges.
STS
28
DB11 DB10
27
DB9
25
DB8
24
DB7
23
DB6
22
DB5
21
DB4
20
DB3
19
DB2
18
DB1
17
DB0 DGND
16 15
26
NIBBLE A
NIBBLE B
NIBBLE C
THREE–STATE BUFFERS AND CONTROL
12–BIT SAR
12–BIT
CAPACITANCE
DAC
COMP
OSC
OFFSET/GAIN
TRIM
REF
CONTROL LOGIC
7.5K
15K
12
7.5K
7.5K
15K
N/C
1
2
4
5
6
7
8
9
10
11
V
13
14
3
V
12/8
CS
A
R/C
CE
V
REF AGND REF
OUT IN
BIP
OFF
10V
IN
20V
IN
LOGIC
0
CC
EE
3
SPECTRUM [ SPECTRUM MICROWAVE, INC. ]
