ADS-118MC 查看數據表（PDF） - Murata Power Solutions
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ADS-118MC Datasheet PDF : 8 Pages
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INNOVATION and EXCELLENCE
ADS-118, ADS-118A
12-Bit, 5MHz, Low-Power
Sampling A/D Converters
FEATURES
• 12-bit resolution
• 5MHz minimum sampling rate
• Functionally complete
• Small 24-pin DDIP
• Requires only ±5V supplies
• Low-power, 1.8 Watts
• Outstanding dynamic performance
• No missing codes over full military temperature range
• Edge-triggered, no pipeline delay
• Ideal for both time and frequency-domain applications
GENERAL DESCRIPTION
DATEL's ADS-118 and ADS-118A are 12-bit, 5MHz, sampling
A/D converters packaged in space-saving 24-pin DDIP’s. The
ADS-118 offers an input range of ±1V and has three-state
outputs. The ADS-118A has an input range of ±1.25V and
features direct adjustment of offset error.
These functionally complete low-power devices (1.8 Watts)
contain an internal fast-settling sample/hold amplifier, a 12-bit
subranging A/D converter, a precise voltage reference, timing/
control logic, and error-correction circuitry. All timing and
control logic operates from the rising edge of a single start
convert pulse. Digital input and output levels are TTL. Models
are available for use in either commercial (0 to +70°C) or
military (–55 to +125°C) operating temperature ranges.
Applications include radar, transient signal analysis, process
control, medical/graphic imaging, and FFT spectrum analysis.
INPUT/OUTPUT CONNECTIONS
PIN FUNCTION
PIN FUNCTION
1 BIT 12 (LSB)
2 BIT 11
3 BIT 10
4 BIT 9
5 BIT 8
6 BIT 7
7 BIT 6
8 BIT 5
9 BIT 4
10 BIT 3
11 BIT 2
12 BIT 1 (MSB)
24 NO CONNECTION
23 ANALOG GROUND
22 NO CONNECTION
21 +5V ANALOG SUPPLY
20 –5V SUPPLY
19 ANALOG INPUT
18 ANALOG GROUND
17* ENABLE/OFFSET ADJ.
16 START CONVERT
15 EOC
14 DIGITAL GROUND
13 +5V DIGITAL SUPPLY
* ADS-118, Pin 17 is ENABLE
ADS-118A, Pin 17 is OFFSET ADJUST
OFFSET ADJUST 17
(ADS-118A only)
ANALOG INPUT 19
–
S/H
+
BUFFER
FLASH
ADC
1
REF
DAC
S
AMP
FLASH
ADC
2
17 ENABLE
(ADS-118A only)
12 BIT 1 (MSB)
11 BIT 2
10 BIT 3
9 BIT 4
8 BIT 5
7 BIT 6
6 BIT 7
5 BIT 9
4 BIT 9
3 BIT 10
2 BIT 11
1 BIT 12 (LSB)
START CONVERT 16
EOC 15
TIMING AND
CONTROL LOGIC
21
+5V ANALOG
SUPPLY
13
+5V DIGITAL
SUPPLY
14
DIGITAL
GROUND
20
–5V SUPPLY
18, 23
ANALOG
GROUND
Figure 1. ADS-118/118A Functional Block Diagram
22, 24
NO CONNECT
DATEL, Inc., 11 Cabot Boulevard, Mansfield, MA 02048-1151 (U.S.A.) • Tel: (508) 339-3000 Fax: (508) 339-6356 • For immediate assistance: (800) 233-2765
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