|
|
PDF ADS929 Data sheet ( Hoja de datos )
| Número de pieza | ADS929 | |
| Descripción | 14-Bit/ 2MHz/ Low-Power Sampling A/D Converters | |
| Fabricantes | ETC | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de ADS929 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
|
No Preview Available !
®®
FEATURES
• 14-bit resolution
• 2MHz sampling rate
• No missing codes
• Functionally complete
• Small 24-pin DDIP or SMT package
• Low power, 1.7 Watts
• Operates from ±15V or ±12V supplies
• Edge-triggered; No pipeline delays
• Bipolar ±5V input range
GENERAL DESCRIPTION
The ADS-929 is a high-performance, 14-bit, 2MHz sampling
A/D converter. This device samples input signals up to Nyquist
frequencies with no missing codes. The ADS-929 features
outstanding dynamic performance including a THD of –79dB.
Housed in a small 24-pin DDIP or SMT (gull-wing) package,
the functionally complete ADS-929 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.
Requiring ±15V (or ±12V) and +5V supplies, the ADS-929
typically dissipates 1.7W (1.4W for ±12V). The unit is offered
with a bipolar input (–5V to +5V). Models are available for use
in either commercial (0 to +70°C) or military (–55 to +125°C)
operating temperature ranges. Applications include radar,
sonar, spectrum analysis, and graphic/medical imaging.
ADS-929
14-Bit, 2MHz, Low-Power
Sampling A/D Converters
INPUT/OUTPUT CONNECTIONS
PIN FUNCTION
PIN FUNCTION
1 BIT 14 (LSB)
2 BIT 13
3 BIT 12
4 BIT 11
5 BIT 10
6 BIT 9
7 BIT 8
8 BIT 7
9 BIT 6
10 BIT 5
11 BIT 4
12 BIT 3
24 –12V/–15V SUPPLY
23 ANALOG GROUND
22 +12V/+15V SUPPLY
21 +10V REFERENCE OUT
20 ANALOG INPUT
19 ANALOG GROUND
18 BIT 1 (MSB)
17 BIT 2
16 START CONVERT
15 EOC
14 DIGITAL GROUND
13 +5V SUPPLY
+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-929 Functional Block Diagram
24
–12V/–15V SUPPLY
DATEL, Inc., 11 Cabot Boulevard, Mansfield, MA 02048-1151 (U.S.A.) • Tel: (508) 339-3000 Fax: (508) 339-6356 • For immediate assistance: (800) 233-2765
1 page  
®®
ADS-929
THERMAL REQUIREMENTS
All DATEL sampling A/D converters are fully characterized and
specified 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 specification tables.
These devices do not normally require heat sinks, however,
standard precautionary design and layout procedures should
be used to ensure 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.
In more severe ambient conditions, the package/junction
temperature of a given device can be reduced dramatically
(typically 35%) by using one of DATEL's HS Series heat sinks.
See Ordering Information for the assigned part number. See
page 1-183 of the DATEL Data Acquisition Components
Catalog for more information on the HS Series. Request
DATEL Application Note AN-8, "Heat Sinks for DIP Data
Converters", or contact DATEL directly, for additional
information.
START
CONVERT
INTERNAL S/H
EOC
N
200ns
typ.
10ns typ.
Hold
310ns typ.
30ns typ.
OUTPUT
DATA
Data (N – 1) Valid
N+1
Acquisition Time
190ns
±40ns
70ns ±10ns
Conversion Time
360ns ±20ns
35ns max.
75ns max.
Data N Valid
425ns min.
Invalid
Data
Notes: 1. fs = 2MHz.
2. The ADS-929 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-929 Timing Diagram
5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet ADS929.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| ADS926 | 14-Bit/ 500kHz/ Low-Power Sampling A/D Converters | ETC |
| ADS929 | 14-Bit/ 2MHz/ Low-Power Sampling A/D Converters | ETC |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |