ADS-919 Datasheet PDF - Datel
| Part Number | ADS-919 | |
| Description | Low-Power Sampling A/D Converters | |
| Manufacturers | Datel | |
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There is a preview and ADS-919 download ( pdf file ) link at the bottom of this page. Total 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: [email protected]
MDA_ADS-919.C02 Page 1 of 9
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THERMAL REQUIREMENTS
All DATEL sampling A/D converters are fully characterized and speci-
fied over operating temperature (case) ranges of 0 to +70°C and –55
to +125°C. All room-temperature (TA = +25°C) production testing is
performed without the use of heat sinks or forced-air cooling. Thermal
impedance figures for each device are listed in their respective specifica-
tion tables.
These devices do not normally require heat sinks, however, standard
precautionary design and layout procedures should be used to ensure
ADS-919
14-Bit, 2MHz, Low-Power Sampling A/D Converters
devices do not overheat. The ground and power planes beneath the package,
as well as all pcb signal runs to and from the device, should be as heavy as
possible to help conduct heat away from the package.
Electrically-insulating, thermally-conductive "pads" may be installed
underneath the package. Devices should be soldered to boards rather than
"socketed," and of course, minimal air flow over the surface can greatly help
reduce the package temperature.
Notes: 1. fs = 2MHz.
2. The ADS-919 is an edge-triggered device. All internal operations
are triggered by the rising edge of the start convert pulse, which
may be as narrow as 20nsec. All production testing is performed
at a 2MHz sampling rate with 200nsec wide start pulses. For
lower sampling rates, wider start pulses may be used, however, a
minimum pulse width low of 20nsec must be maintained.
Figure 4. ADS-919 Timing Diagram
DATEL, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 USA • Tel: (508) 339-3000 • www.datel.com • e-mail: [email protected]
MDA_ADS-919.C02 Page 5 of 9
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for ADS-919 electronic component. |
| Information | Total 9 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ ADS-919.PDF Datasheet ] | |
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