ADS-947GE View Datasheet(PDF) - DATEL Data Acquisition products
Part Name
Description
Manufacturer
ADS-947GE Datasheet PDF : 9 Pages
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FEATURES
14-bit resolution
10MHz minimum sampling rate
No missing codes
Ideal for both time and frequency-domain
applications
Edge-triggered
Small, 24-pin, ceramic DDIP or SMT
Requires only +5V supplies
Low-power, 2.2 Watts
BLOCK DIAGRAM
ADS-947
14-Bit, 10MHz Sampling A/D Converters
PRODUCT OVERVIEW
The ADS-947 is a 14-bit, 10MHz sampling A/D
converter. This device accurately samples full-scale
input signals up to Nyquist frequencies with no
missing codes. Excellent differential nonlinearity
error (DNL), signal-to-noise ratio (SNR), and total
harmonic distortion (THD) make the ADS-947
the ideal choice for both time-domain (CCD/FPA
imaging, scanners, process control) and frequency-
domain (radar, telecommunications, spectrum
analysis) applications.
The functionally complete ADS-947 contains
a fast-settling sample/hold amplifier, a subranging
(two-pass) A/D converter, an internal reference,
timing/control logic, and error-correction circuitry.
Digital input and output levels are TTL. The ADS-
947 only requires the rising edge of a start convert
pulse to operate.
Requiring only +5V and –5V supplies, the ADS-
947 typically dissipates just 2.2 Watts. The device
is offered with a bipolar input range of ±2V. Models
are available for use in either commercial (0 to
+70°C) or industrial (–40 to +100°C), operating
temperature ranges. A proprietary, auto-calibrating,
error-correcting circuit allows the device to achieve
specified performance over the extended tempera-
ture range.
INPUT/OUTPUT CONNECTIONS
PIN FUNCTION
PIN FUNCTION
1 BIT 1 (MSB)
24 ANALOG GROUND
2 BIT 2
23 OFFSET ADJUST
3 BIT 3
22 +5V ANALOG SUPPLY
4 BIT 4
21 ANALOG INPUT
5 BIT 5
20 –5V SUPPLY
6 BIT 6
19 ANALOG GROUND
7 BIT 7
18 START CONVERT
8 BIT 8
17 DATA VALID
9 BIT 9
16 BIT 14 (LSB)
10 BIT 10
15 BIT 13
11 BIT 11
14 DIGITAL GROUND
12 BIT 12
13 +5V DIGITAL SUPPLY
OFFSET ADJUST 23
ANALOG INPUT 21
POWER AND GROUNDING
+5V ANALOG SUPPLY 22
+5V DIGITAL SUPPLY 13
–5V SUPPLY
20
ANALOG GROUND 19, 24
DIGITAL GROUND
14
START CONVERT 18
DATA VALID 17
–
S/H
+
BUFFER
FLASH
ADC
1
REF
DAC
∑
AMP
FLASH
ADC
2
TIMING AND
CONTROL LOGIC
16 BIT 14 (LSB)
15 BIT 13
12 BIT 12
11 BIT 11
10 BIT 10
9 BIT 9
8 BIT 8
7 BIT 7
6 BIT 6
5 BIT 5
4 BIT 4
3 BIT 3
2 BIT 2
1 BIT 1 (MSB)
Figure 1. ADS-947 Functional Block Diagram
DATEL, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 USA • Tel: (508) 339-3000 • www.datel.com • e-mail: help@datel.com
MDA_ADS-947.D01 Page 1 of 9
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