www.murata-ps.com
ADS-117
12-Bit, 2MHz, Low-Power Sampling A/D Converters
PRODUCT OVERVIEW
DATEL's ADS-117 is a functionally complete,
12-bit, 2MHz, sampling A/D converter. Its stan-
dard, 24-pin, double-width DIP contains a fast-
settling sample-hold amplifier, a 12-bit subranging
(two-step) A/D converter, a precision reference,
three-state output register and all the timing and
control logic necessary to operate from a single
start convert pulse. Digital input and output levels
are TTL.
Total harmonic distortion (THD) and signal-
to-noise ratio (including distortion) typically run
–78dB and 70dB, respectively, with full scale
inputs up to 100kHz. The ADS-117 requires ±15V
and +5V power supplies and typically consumes
1.6 Watts. Models are available for use in either
commercial (0 to +70°C) or military (–55 to
+125°C) operating temperature ranges and
extended commerical (–40 to +85°C).
FEATURES
12-bit resolution
No missing codes
2MHz minimum throughput
Functionally complete
Small 24-pin DDIP
Low-power, 1.6 Watts
Three-state output buffers
Samples to Nyquist frequencies
PIN
1
2
3
4
5
6
7
8
9
10
11
12
FUNCTION
BIT 11
BIT 10
BIT 9
BIT 8
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
INPUT/OUTPUT CONNECTIONS
PIN FUNCTION
24
23
22
21
20
19
18
17
16
15
14
13
–15V Supply
ANALOG GROUND
+15V SUPPLY
+10V REFERENCE
BIPOLAR
ANALOG INPUT
COMP BIN
ENABLE (1-12)
START CONVERT
EOC
DIGITAL GROUND
+5V SUPPLY
BIT 12 (LSB)
BIT 1 (MSB)
BLOCK DIAGRAM
17 ENABLE (1-12)
DAC
12 BIT 1 (MSB)
+10V REF. 21
S
2
S/H
S
1
BIPOLAR 20
BUFFER
FLASH
ADC
REF
11 BIT 2
DIGITAL CORRECTION LOGIC
3-STATE OUTPUT REGISTER
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
REGISTER
24
–15V SUPPLY
Figure 1. ADS-117 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-117.B01
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