ADS-951 查看數據表（PDF） - DATEL Data Acquisition products
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ADS-951 Datasheet PDF : 7 Pages
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ADS-951
18-Bit, 1MHz, Low-Power Sampling A/D Converters
FEATURES
18-bit resolution
1MHz minimum sampling rate
No missing codes over full HI-REL temperature
range
Very low power, 390mW
Small, 32-pin, SMT or side-brazed, ceramic
package
Edge-triggered, no pipeline delays
Excellent performance
Ideal for both time and frequency-domain
applications
Low cost
PRODUCT OVERVIEW
The ADS-951 is an 18-bit, 1MHz sampling A/D
converter. This device provides low noise perfor-
mance and dynamic specifications up to 100 kHz
with no missing codes. This, combined with excellent
signal-to-noise ratio (SNR) and total harmonic
distortion (THD), makes the ADS-951 the ideal choice
for both time-domain (medical imaging, scanners,
process control) and frequency-domain (radar, tele-
communications, spectrum analysis) applications.
Packaged in a 32-pin, SMT or side-brazed,
metal-sealed, ceramic package, the function-
ally complete ADS-951 contains a fast-settling
sample-hold amplifier, an A/D converter, an internal
reference, and timing/control logic. Digital input
and output levels are TTL, and the ADS-951 only
requires the rising edge of the start convert pulse
to operate.
The ADS-951 typically dissipates 390mW. The
device is offered with a bipolar (±5V) analog input
range. Models are available for use in commercial
(0 to +70°C), extended (–40 to +110°C), or HI-REL
(–55 to +125°C) operating temperature ranges.
Contact DATEL for converters with input ranges
of ±10V (ADS-951-1) or 0 to +10V (ADS-951-2).
BLOCK DIAGRAM
OFFSET ADJUST 5
ANALOG INPUT 3
–
S/H
+
GAIN ADJUST 6
+4.22V REFERENCE OUT 1
GAIN
CIRCUIT
BUFFER
A/D
REF
START CONVERT 27
EOC 26
TIMING AND
CONTROL LOGIC
25 BIT 1 (MSB)
24 BIT 2
23 BIT 3
22 BIT 4
21 BIT 5
20 BIT 6
19 BIT 7
18 BIT 8
17 BIT 9
16 BIT 10
15 BIT 11
14 BIT 12
13 BIT 13
12 BIT 14
11 BIT 15
10 BIT 16
9 BIT 17
8 BIT 18 (LSB)
30
+5VA ANALOG
SUPPLY
32
–5VA ANALOG
SUPPLY
2, 4, 31
ANALOG
GROUND
29
+5VD DIGITAL
SUPPLY
Figure 1. ADS-951 Functional Block Diagram
7, 28
DIGITAL
GROUND
DATEL, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 USA • Tel: (508) 339-3000 • www.datel.com • e-mail: help@datel.com
10 Sep 2015 MDA_ADS-951.E01 Page 1 of 7
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