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PDF ADS-916 Data sheet ( Hoja de datos )
| Número de pieza | ADS-916 | |
| Descripción | Low-Power Sampling A/D Converters | |
| Fabricantes | Datel | |
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ADS-916
14-Bit, 500kHz, Low-Power Sampling A/D Converters
FEATURES
14-bit resolution
500kHz sampling rate
Functionally complete; No missing codes
Edge-triggered; No pipeline delays
Small 24-pin DDIP or SMT package
Low power, 1.8 Watts maximum
Operates from ±15V or ±12V supplies &
+5V supply
Unipolar 0 to +10V input range (for bipolar ±5V
see ADS-926)
PRODUCT OVERVIEW
The ADS-916 is a high-performance, 14-bit,
500kHz sampling A/D converter. This device
samples input signals up to Nyquist frequencies
with no missing codes. The ADS-916 features
outstanding dynamic performance including a THD
of –90dB.
Housed in a small 24-pin DDIP or SMT (gull-
wing) package, the functionally complete ADS-916
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-916 dissipates 1.8W (1.6W for ±12V)
maximum. The unit is offered with a unipolar
input (0 to +10V). 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.
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
13
+5V SUPPLY
14
DIGITAL GROUND
22
+12V/+15V SUPPLY
19, 23
ANALOG GROUND
Figure 1. ADS-916 Functional Block Diagram
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)
24
–12V/–15V SUPPLY
DATEL, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 USA • Tel: (508) 339-3000 • www.datel.com • e-mail: [email protected]
24 Jul 2015 MDA_ADS-916.C02 Page 1 of 9
1 page  
ADS-916
14-Bit, 500kHz, Low-Power Sampling A/D Converters
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 precau-
tionary 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 under-
neath the package. Devices should be soldered to boards rather than "sock-
eted," and of course, minimal air flow over the surface can greatly help reduce
the package temperature.
START
CONVERT
INTERNAL S/H
EOC
OUTPUT
DATA
N
200ns
typ.
10ns typ.
Hold
430ns typ.
Acquisition Time
1570ns ±40ns
90ns typ.
70ns ±10ns
Conversion Time
420ns ±20ns
Data (N – 1) Valid
Invalid
Data
35ns max.
74ns max.
Data N Valid (1926ns min.)
Notes: 1. fs = 500kHz.
2. The ADS-916 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 50nsec. All production testing is performed
at a 500kHz sampling rate with 200nsec wide start pulses. For
lower sampling rates, wider start pulses may be used, however, a
minimum pulse width low of 50nsec must be maintained.
Figure 4. ADS-916 Timing Diagram
N+1
DATEL, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 USA • Tel: (508) 339-3000 • www.datel.com • e-mail: [email protected]
24 Jul 2015 MDA_ADS-916.C02 Page 5 of 9
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet ADS-916.PDF ] | |
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