ADS-933MM View Datasheet(PDF) - Murata Power Solutions
Part Name
Description
MFG CO.
ADS-933MM Datasheet PDF : 8 Pages
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INNOVATION and EXCELLENCE
PRELIMINARY PRODUCT DATA
ADS-933
16-Bit, 3MHz
Sampling A/D Converters
FEATURES
• 16-bit resolution
• 3MHz sampling rate
• Functionally complete
• No missing codes over full military temperature range
• Edge-triggered
• ±5V supplies, 1.85 Watts
• Small, 40-pin, ceramic TDIP
• 85dB SNR, –84dB THD
• Ideal for both time and frequency-domain applications
GENERAL DESCRIPTION
The low-cost ADS-933 is a 16-bit, 3MHz 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-933 has been optimized to
achieve a signal-to-noise ratio (SNR) of 85dB and a total
harmonic distortion (THD) of –84dB.
Packaged in a 40-pin TDIP, the functionally complete
ADS-933 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-933 only requires the
rising edge of the start convert pulse to operate.
Requiring only ±5V supplies, the ADS-933 dissipates 1.85
Watts. The device is offered with a bipolar (±2.75V) analog
input range and 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
+5V ANALOG SUPPLY 38
+5V DIGITAL SUPPLY 31
–5V SUPPLY
37
ANALOG GROUND
4, 36
DIGITAL GROUND
7, 30
NO CONNECTION 39, 40
+3.2V REF. OUT 1
OFFSET ADJUST 5
UNIPOLAR 2
ANALOG INPUT 3
OFFSET ADJUST 5
PRECISION
+3.2V REFERENCE
OFFSET
ADJUST
CKT.
S/H
START CONVERT 12
EOC 32
COMP. BITS 35
TIMING AND
CONTROL LOGIC
Figure 1. ADS-933 Functional Block Diagram
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
DATEL, Inc., Mansfield, MA 02048 (USA) • Tel: (508)339-3000, (800)233-2765 Fax: (508) 339-6356 • E-mail: sales@datel.com • Internet: www.datel.com
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