ADS-926MM-C 查看數據表（PDF） - DATEL Data Acquisition products
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ADS-926MM-C Datasheet PDF : 9 Pages
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FEATURES
14-bit resolution
500kHz sampling rate
Functionally complete; No missing codes
Small 24-pin DDIP or SMT package
Operates from ±15V or ±12V supplies
+5V supply
Low power, 1.75 Watts maximum
Samples up to Nyquist frequencies
Outstanding dynamic performance
Bipolar ±5V input range (for unipolar 0 to 10V
input range see ADS-916)
For two’s complement output coding, please
order ADS-926-2 models
BLOCK DIAGRAM
ADS-926
14-Bit, 500kHz, Low-Power Sampling A/D Converters
PRODUCT OVERVIEW
The ADS-926 is a high-performance, 14-bit,
500kHz sampling A/D converter. This device
accurately samples full-scale input signals up to
Nyquist frequencies with no missing codes and
exhibits outstanding dynamic performance that
surpasses most 16-bit, 500kHz sampling A/D's.
THD and SNR, for example, are typically –90dB
and 80dB when converting fullscale input signals
up to 100kHz.
Housed in a small 24-pin DDIP or SMT (gull-
wing) package, the functionally complete ADS-926
contains a fast-settling sample-hold amplifier, a
subranging (two-pass) A/D converter, a precise
voltage reference, timing/control logic, and error-
correction circuitry. Digital input and output levels
are TTL. The ADS-926-2 series provide MSB at Pin
18 instead of MSB for two’s complement output
coding.
Requiring ±15V (or ±12V) and +5V supplies,
the ADS-926 dissipates only 1.75W (1.6W for
±12V), maximum. The unit is offered with a bipolar
input (–5V to +5V). Models are available for use
in either commercial (0 to +70°C), industrial (–40
to +100°C), or HI-REL (–55 to +125°C) operating
temperature ranges.
Applications include radar, sonar, spectrum
analysis, and graphic/medical imaging. Contact
DATEL for information on devices screened to
MIL-STD-883.
INPUT/OUTPUT CONNECTIONS
PIN FUNCTION
PIN FUNCTION
1 BIT 14 (LSB)
24 –12V/–15V SUPPLY
2 BIT 13
23 ANALOG GROUND
3 BIT 12
22 +12V/+15V SUPPLY
4 BIT 11
21 +10V REFERENCE OUT
5 BIT 10
20 ANALOG INPUT
6 BIT 9
19 ANALOG GROUND
7 BIT 8
18 BIT 1 (MSB)*
8 BIT 7
17 BIT 2
9 BIT 6
16 START CONVERT
10 BIT 5
15 EOC
11 BIT 4
14 DIGITAL GROUND
12 BIT 3
13 +5V SUPPLY
*MSB for ADS-926-2 models
+10V REF. OUT 21
ANALOG INPUT 20
S/H
–
+
REF
S2
FLASH
ADC
S1 BUFFER
DAC
START CONVERT 16
EOC 15
TIMING AND
CONTROL LOGIC
18 BIT 1 (MSB)
17 BIT 2
12 BIT 3
11 BIT 4
10 BIT 5
9 BIT 6
8 BIT 7
7 BIT 8
6 BIT 9
5 BIT 10
4 BIT 11
3 BIT 12
2 BIT 13
1 BIT 14 (LSB)
13
+5V SUPPLY
14
DIGITAL GROUND
22
+12V/+15V SUPPLY
19, 23
ANALOG GROUND
Figure 1. ADS-926 Functional Block Diagram
24
–12V/–15V SUPPLY
DATEL, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 USA • Tel: (508) 339-3000 • www.datel.com • e-mail: help@datel.com
02 Oct 2015 MDA_ADS-926.C03.D1 Page 1 of 9
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