www.murata-ps.com
ADS-112
12-Bit, 1MHz, Low-Power Sampling A/D Converters
PRODUCT OVERVIEW
DATEL’s ADS-112 is a 12-bit, functionally com-
plete, sampling A/D converter that is packaged in
a space-saving 24-pin DDIP. Requiring ±15V and
+5V supplies, a minimum sampling rate of 1MHz
is achieved while only dissipating 1.3 Watts. The
ADS-112 digitizes signals up to Nyquist frequen-
cies. Models are available for use in either com-
mercial (0 to + 70°C) or military (–55 to +125°C)
operating temperature ranges.
Typical applications include spectrum, tran-
sient, vibration and waveform analysis. This device
is also ideally suited for radar, sonar, video digitiza-
tion, medical instrumentation and highspeed data
acquisition systems.
INPUT/OUTPUT CONNECTIONS
PIN
1
2
3
4
5
6
7
8
9
10
11
12
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)
PIN
24
23
22
21
20
19
18
17
16
15
14
13
FUNCTION
–15V SUPPLY
ANALOG GROUND
+15V SUPPLY
+10V REFERENCE
BIPOLAR
ANALOG INPUT
COMP BIN
ENABLE (1-12)
START CONVERT
EOC
DIGITAL GROUND
+5V SUPPLY
FEATURES
■
■
■
■
■
■
■
■
12-bit resolution
No missing codes
1MHz minimum sampling rate
Functionally complete
Small 24-pin DDIP
Low-power, 1.3 Watts
Three-state output buffers
Samples to Nyquist frequencies
17 ENABLE (1-12)
DAC
12 BIT 1 (MSB)
+10V REF. 21
S
2
S/H
S
1
BIPOLAR 20
REGISTER
BUFFER
FLASH
ADC
REF
DIGITAL CORRECTION LOGIC
3-STATE OUTPUT REGISTER
11 BIT 2
10 BIT 3
9
8
7
6
5
4
3
2
1
BIT 4
BIT 5
BIT 6
BIT 7
BIT 8
BIT 9
BIT 10
BIT 11
BIT 12 (LSB)
ANALOG INPUT 19
–
+
COMP BIN 18
START CONVERT 16
EOC 15
TIMING AND
CONTROL LOGIC
13
+5V SUPPLY
14
DIGITAL GROUND
22
+15V SUPPLY
REGISTER
23
ANALOG GROUND
24
–15V SUPPLY
Figure 1. ADS-112 Functional Block Diagram
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com
Technical enquiries
email: data.acquisition@murata-ps.com, tel:
+1 508 339 3000
MDA_ADS-112.B01
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