ADC-HX, ADC-HZ Series
12-Bit, 8 and 20μsec Analog-to-Digital Converters
PRODUCT OVERVIEW
The ADC-HX and ADC-HZ Series are self-
contained, high-performance, 12-bit A/D converters
manufactured with thick and thin-film hybrid tech-
nology. They use the successive approximation
conversion technique to achieve a 12-bit conver-
sion in 20 and 8 microseconds, respectively. Five
input voltage ranges are programmable by external
pin connection. An internal buffer amplifier is also
provided for applications in which 50 megohm
input impedance is required.
These converters utilize a fast 12-bit monolithic
DAC which includes a precision zener reference
source. The circuit also contains a fast mono-
lithic comparator, a monolithic 12-bit successive
approximation register, a clock and a monolithic
buffer amplifier. Nonlinearity is specified at
±1/2LSB maximum.
Both models have identical operation except
for conversion speed. They can be short-cycled to
give faster conversions in lower-resolution applica-
tions. Use of the internal buffer amplifier increases
conversion time by 3 microseconds, the settling
time of the amplifier. Output coding is comple-
mentary binary, complementary offset binary, or
complementary two’s complement. Serial data is
also brought out. The package is a 32-pin ceramic
TDIP. Models are available for use in either com-
mercial (0 to +70°C) or military (–55 to +125°C)
operating temperature ranges. MIL-STD-883 and
DESC Standard Military Drawing models are also
available.
INPUT/OUTPUT CONNECTIONS
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
+15V POWER
28
–15V POWER
31
BUFFER
AMPLIFIER
6.3k
PRECISION
REF (+6.3V)
GAIN
27 ADJUST
REF. OUT
18
+5V POWER
16
FEATURES
S
12-bit resolution
8 or 20 microsecond conversion times
5 input voltage ranges
Internal high Z input buffer
Short-cycle operation
MIL-STD-883 models available
Function
BIT 12 (LSB)
BIT 11
BIT 10
BIT 9
BIT 8
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1 (MSB)
BIT 1 (MSB)
SHORT CYCLE
DIGITAL COMMON
+5V POWER
Pin
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
Function
SERIAL DATA OUTPUT
–15V POWER
BUFFER INPUT
BUFFER OUTPUT
+15V POWER
GAIN ADJUST
ANALOG COMMON
20V INPUT RANGE
10V INPUT RANGE
BIPOLAR OFFSET
COMPARATOR INPUT
START CONVERT
E.O.C. (STATUS)
CLOCK OUT
REFERENCE OUT
CLOCK RATE
BUFFER 30
INPUT
+
BUFFER 29
OUTPUT
BIPOLAR
23
OFFSET
COMPARATOR 22
INPUT
5k
10V
24
INPUT
5k
20V
25
INPUT
ANALOG
26
COMMON
12-BIT DAC
COMPARATOR
15
DIGITAL
COMMON
14 SHORT
CYCLE
SUCCESSIVE
APPROXIMATION
REGISTER
CLOCK
20
E.O.C.
STATUS
17
CLOCK
RATE
19
CLOCK
OUT
21
START
CONV.
1
2
3
10
4
9
5
8
6
7
7
6
8
5
9 10 11 12
4
3
2
13
1
12 11
LSB.
1
For full details go to
www.murata-ps.com/rohs
BIT NO.
MSB MSB
32
SERIAL
DATA
OUT
PARALLEL DATA OUT
Figure 1. Functional Block Diagram
www.murata-ps.com
Technical enquiries
email: sales@murata-ps.com, tel:
+1 508 339 3000
MDA_ADCHXHZ.B01
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