ADS-919 Просмотр технического описания (PDF) - DATEL Data Acquisition products
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ADS-919 Datasheet PDF : 9 Pages
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ADS-919
14-Bit, 2MHz, Low-Power Sampling A/D Converters
FEATURES
14-bit resolution
2MHz sampling rate
No missing codes
Functionally complete
Small 24-pin DDIP or SMT package
Low power, 1.8 Watts
Operates from ±15V or ±12V supplies &
+5V supply
Edge-triggered; No pipeline delays
Unipolar 0 to +10V input range (for bipolar ±5V
input range see ADS-929)
PRODUCT OVERVIEW
The ADS-919 is a high-performance, 14-bit,
2MHz sampling A/D converter. This device
accurately samples full-scale input signals up to
Nyquist frequencies with no missing codes. The
ADS-919 features outstanding dynamic perfor-
mance including a THD of –74dB.
Housed in a small 24-pin DDIP or SMT (gull-
wing) package, the functionally complete ADS-919
contains a fast-settling sample-hold amplifier,a sub-
ranging (two-pass) A/D converter, a precise voltage
reference, timing/control logic, and error correction
circuitry.Digital input and output levels are TTL.
Requiring ±15V (or ±12V) and +5V supplies,
the ADS-919 typically dissipates 1.8W (1.5W for
±12V). The unit is offered with a unipolar input (0
to +10V). There are four models of the ADS-919
covering three operating temperature ranges, 0 to
+70°C, -40 to +100°C, –55 to +125°C and one
high reliability “883” model is also available. All
models are housed in the same ceramic package.
Each model is available in Non-RoHS version or
RoHS compliant (-C) version. Applications include
radar, sonar, spectrum analysis, and graphic/
medical imaging.
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
BLOCK DIAGRAM
+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
24
–12V/–15V SUPPLY
Figure 1. ADS-919 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-919.C02 Page 1 of 9
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