![](http://datasheet.mmic.net.cn/280000/HT574_datasheet_16077083/HT574_1.png)
Advance Information
HTMOS
TM
High Temperature Products
HIGH TEMPERATURE
μ
P COMPATIBLE
12-BIT A/D CONVERTER
HT574
Down-Hole Oil Well
Avionics
Turbine Engine Control
Industrial Process Control
Nuclear Reactor
Electric Power Conversion
Heavy Duty Internal Combustion Engines
Specified Over -55 to +225
°
C
Includes On-Chip Clock, Reference,
μ
P Interface and Sample/Hold
11-Bit Linearity
10
μ
s Maximum Conversion, Including Acquisition
Hermetic 28-Lead Ceramic DIP
FEATURES
APPLICATIONS
GENERAL DESCRIPTION
e
(pitch)
b
(width)
A
S1
b2
Q
L
S2
D
E
1
Right
Reading
on Lid
Ceramic
Body
A
b
b2
C
D
E
e
eA
L
Q
S1
S2
0.175 (max)
0.018 ± 0.002
0.050 (typ)
0.010 to 0.002
1.400 ± 0.014
0.594 ± 0.010
0.100 ±0.005
0.600 ±0.010
0.125 to 0.175
0.050 ±0.010
0.005 (min)
0.005 (min)
All dimensions in inches
eA
C
28-LEAD PACKAGE
The HT574 is a general purpose, 12-bit successive approxi-
mation A/D converter intended for applications with an
extremely wide operating temperature range. Fabricated
with Honeywell’s dielectrically isolated high temperature
(HTMOS) process, it is designed specifically for severe
high-temperature applications.
The HT574 includes a switched capacitor, digital-to-analog
converter, internal reference, comparator, successive ap-
proximation register, sample and hold, oscillator and archi-
tecture which allows it to be used with minimal external
components. Tristate output buffers and digital control pins
are also provided for microprocessor interfacing. Analog
input signal ranges of 0 to +10V, 0 to +20V, or
±
5V may be
selected from the internal resistor scaling network.
The HT574 provides 12-bit conversions in 10
μ
s over the
entire -55 to +225
°
C temperature range.
Typically, parts will
operate up to +300
°
C for a year, with derated performance.
All parts are burned in at 250
°
C to eliminate infant mortality.
Solid State Electronics Center 12001 State Highway 55, Plymouth, MN 55441 (800) 323-8295 http://www.ssec.honeywell.com