ADC-HX12BGC Datasheet, PDF (1/6 Pages) Murata Power Solutions Inc. – 12-Bit, 8 and 20μsec Analog-to-Digital Converters

ADC-HX, ADC-HZ Series
12-Bit, 8 and 20μsec Analog-to-Digital Converters
FEATURES
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
BUFFER ₃₀
INPUT
BUFFER ₂₉
OUTPUT
BIPOLAR
OFFSET
23
COMPARATOR ₂₂
INPUT
10V
INPUT
24
20V
INPUT
25
ANALOG
COMMON
26
Ḥ
For full details go to
www.murata-ps.com/rohs
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
Function
Pin
Function
1 BIT 12 (LSB)
32 SERIAL DATA OUTPUT
2 BIT 11
31 –15V POWER
3 BIT 10
30 BUFFER INPUT
4 BIT 9
29 BUFFER OUTPUT
5 BIT 8
28 +15V POWER
6 BIT 7
27 GAIN ADJUST
7 BIT 6
26 ANALOG COMMON
8 BIT 5
25 20V INPUT RANGE
9 BIT 4
24 10V INPUT RANGE
10 BIT 3
23 BIPOLAR OFFSET
11 BIT 2
22 COMPARATOR INPUT
12 BIT 1 (MSB)
21 START CONVERT
13 BIT 1 (MSB)
20 E.O.C. (STATUS)
14 SHORT CYCLE
19 CLOCK OUT
15 DIGITAL COMMON
18 REFERENCE OUT
16 +5V POWER
17 CLOCK RATE
+15V POWER
28
–15V POWER
31
REF. OUT
18
+5V POWER
16
BUFFER
+
AMPLIFIER
6.3k8
PRECISION
REF (+6.3V)
GAIN
27 _ADJUST
5k8
COMPARATOR
5k8
CLOCK
12-BIT DAC
SUCCESSIVE
APPROXIMATION
REGISTER
15
DIGITAL
COMMON
14 ^SHORT
CYCLE
20
E.O.C.
STATUS
17
19
21
1 2 3 4 5 6 7 8 9 10 11 12 13
CLOCK CLOCK START ^{12 11 10 9 8 7 6 5 4 3 2 1 1}
RATE
OUT CONV. ^LSB.
BIT NO.
MSB MSB
PARALLEL DATA OUT
Figure 1. Functional Block Diagram
32
SERIAL
DATA
OUT
www.murata-ps.com
Technical enquiries email: [e-mail], tel: [phone]
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