ADS-931MC Просмотр технического описания (PDF) - DATEL Data Acquisition products
Номер в каталоге
Компоненты Описание
производитель
ADS-931MC Datasheet PDF : 10 Pages
| |||
®
®
INNOVATION and EXCELLENCE
ADS-931
16-Bit, 1MHz
Sampling A/D Converters
FEATURES
• 16-bit resolution
• 1MHz sampling rate
• Functionally complete
• No missing codes over full military temperature range
• Edge-triggered
• ±5V supplies, 1.85 Watts
• Small, 40-pin, ceramic TDIP
• 87dB SNR, –89dB THD
• Ideal for both time and frequency-domain applications
GENERAL DESCRIPTION
The low-cost ADS-931 is a 16-bit, 1MHz sampling A/D
converter. This device accurately samples full-scale input
signals up to Nyquist frequencies with no missing codes. The
dynamic performance of the ADS-931 has been optimized to
achieve a signal-to-noise ratio (SNR) of 87dB and a total
harmonic distortion (THD) of –89dB.
Packaged in a 40-pin TDIP, the functionally complete ADS-931
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-931 only requires the rising edge of the start
convert pulse to operate.
Requiring only ±5V supplies, the ADS-931 dissipates 1.85
Watts. The device is offered with a bipolar (±2.75V) analog
input range or a unipolar (0 to –5.5V) input range. Models are
available for use in either commercial (0 to +70°C) or military
(–55 to +125°C) operating temperature ranges. A proprietary,
auto-calibrating, error-correcting circuit enables the device to
achieve specified performance over the full military
temperature range. Typical applications include medical
imaging, radar, sonar, communications and instrumentation.
INPUT/OUTPUT CONNECTIONS
PIN FUNCTION
PIN FUNCTION
1
+3.2V REF. OUT
2
UNIPOLAR
3
ANALOG INPUT
4
ANALOG GROUND
5
OFFSET ADJUST
6
GAIN ADJUST
7
DIGITAL GROUND
8
FIFO/DIR
9
FIFO READ
10 FSTAT1
11 FSTAT2
12 START CONVERT
13 BIT 16 (LSB)
14 BIT 15
15 BIT 14
16 BIT 13
17 BIT 12
18 BIT 11
19 BIT 10
20 BIT 9
40 NO CONNECTION
39 NO CONNECTION
38 +5V ANALOG SUPPLY
37 –5V SUPPLY
36 ANALOG GROUND
35 COMP. BITS
34 OUTPUT ENABLE
33 OVERFLOW
32 EOC
31 +5V DIGITAL SUPPLY
30 DIGITAL GROUND
29 BIT 1 (MSB)
28 BIT 1 (MSB)
27 BIT 2
26 BIT 3
25 BIT 4
24 BIT 5
23 BIT 6
22 BIT 7
21 BIT 8
GAIN ADJUST 6
GAIN
ADJUST
CKT.
POWER and GROUNDING
ANALOG GROUND
4, 36
DIGITAL GROUND
7, 30
+5V DIGITAL SUPPLY 31
–5V SUPPLY
37
+5V ANALOG SUPPLY 38
NO CONNECTION 39, 40
+3.2V REF. OUT 1
OFFSET ADJUST 5
UNIPOLAR 2
ANALOG INPUT 3
OFFSET ADJUST 5
START CONVERT 12
EOC 32
COMP. BITS 35
PRECISION
+3.2V REFERENCE
OFFSET
ADJUST
CKT.
S/H
TIMING AND
CONTROL LOGIC
10 FSTAT1
11 FSTAT2
8 FIFO/DIR
9 FIFO/READ
29 BIT 1 (MSB)
28 BIT 1 (MSB)
27 BIT 2
26 BIT 3
25 BIT 4
24 BIT 5
23 BIT 6
22 BIT 7
21 BIT 8
20 BIT 9
19 BIT 10
18 BIT 11
17 BIT 12
16 BIT 13
15 BIT 14
14 BIT 15
13 BIT 16 (LSB)
34 OUTPUT ENABLE
33 OVERFLOW
Figure 1. ADS-931 Functional Block Diagram
DATEL, Inc., Mansfield, MA 02048 (USA) • Tel: (508)339-3000, (800)233-2756 Fax: (508)339-6356 • E-mail:sales@datel.com • Internet: www.datel.com
Share Link: 