ADS-942 MURATA-PS [Murata Power Solutions Inc.], ADS-942 Datasheet

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ADS-942

Manufacturer Part Number
ADS-942
Description
14-Bit, 2MHz Sampling A/D Converters
Manufacturer
MURATA-PS [Murata Power Solutions Inc.]
Datasheet

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Part Number:
ADS-942MC
Manufacturer:
a
Quantity:
13
FEATURES
GENERAL DESCRIPTION
DATEL's ADS-942 is a functionally complete, 14-bit, 2MHz,
sampling A/D converter. Its standard, 32-pin, triple-wide
ceramic DIP contains a fast-settling sample/hold amplifier, a
14-bit subranging (two-pass) A/D converter, a precision
reference, three-state output register and all the timing and
control logic necessary to operate from a single start
convert pulse.
The ADS-942 is optimized for wideband frequency-domain
applications and is fully FFT tested. The ADS-942 requires
±15V and +5V supplies and typically consumes 2.9 Watts.
DATEL, Inc., 11 Cabot Boulevard, Mansfield, MA 02048-1151 (U.S.A.)
14-bit resolution
2MHz minimum throughput
Functionally complete
Internal reference and sample/hold
-85dB total harmonic distortion
78dB signal-to-noise ratio
Full Nyquist-rate sampling
Small 32-pin DIP
Low-power, 2.9 Watts
START CONVERT 32
®
OFFSET ADJUST 5
ANALOG INPUT 3
+10V REF. OUT 1
BIPOLAR 2
EOC 16
GROUND
SIGNAL
CONTROL LOGIC
S/H
4
TIMING AND
OFFSET
CIRCUIT
SUPPLY
+5V
10
®
Figure 1. ADS-942 Functional Block Diagram
S
S
2
1
GROUND
DIGITAL
BUFFER
11
FLASH
ADC
REF
Tel: (508) 339-3000 Fax: (508) 339-6356
SUPPLY
+15V
12
PIN
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
GROUND
ANALOG
DAC
6, 14, 15
+10V REF. OUT
BIPOLAR
ANALOG INPUT
SIGNAL GROUND
OFFSET ADJUST
ANALOG GROUND
OVERFLOW
CODING SELECT
ENABLE
+5V SUPPLY
DIGITAL GROUND
+15V SUPPLY
–15V SUPPLY
ANALOG GROUND
ANALOG GROUND
EOC
FUNCTION
INPUT/OUTPUT CONNECTIONS
Sampling A/D Converters
SUPPLY
–15V
13
For immediate assistance: (800) 233-2765
CODING
SELECT
PIN
8
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
14-Bit, 2MHz
ADS-942
START CONVERT
BIT 1 OUT (MSB)
BIT 1 OUT (MSB)
BIT 2 OUT
BIT 3 OUT
BIT 4 OUT
BIT 5 OUT
BIT 6 OUT
BIT 7 OUT
BIT 8 OUT
BIT 9 OUT
BIT 10 OUT
BIT 11 OUT
BIT 12 OUT
BIT 13 OUT
BIT 14 OUT (LSB)
FUNCTION
31 BIT 1 OUT (MSB)
30 BIT 1 OUT (MSB)
29 BIT 2 OUT
28 BIT 3 OUT
27 BIT 4 OUT
26 BIT 5 OUT
25 BIT 6 OUT
24 BIT 7 OUT
23 BIT 8 OUT
22 BIT 9 OUT
21 BIT 10 OUT
20 BIT 11 OUT
19 BIT 12 OUT
18 BIT 13 OUT
17 BIT 14 OUT (LSB)
9 ENABLE
7 OVERFLOW

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ADS-942 Summary of contents

Page 1

... The ADS-942 is optimized for wideband frequency-domain applications and is fully FFT tested. The ADS-942 requires ±15V and +5V supplies and typically consumes 2.9 Watts. +10V REF. OUT 1 OFFSET ...

Page 2

... Supply ±0.6 ±0.8 % +5V Supply Power Dissipation Power Supply Rejection 14 Bits PHYSICAL/ENVIRONMENTAL Operating Temp. Range, Case ADS-942MC ADS-942ME Storage Temperature Range Package Type Weight 2 ® MIN. TYP. MAX. Staight Bin./Offset Bin./2's Comp. Comp. Bin./Comp. Offset Bin./C2C +2.4 — ...

Page 3

... Hold 150ns max. 350ns min. Aquisition Time DATA N-1 VALID 300ns min. INVALID DATA 200ns max. Figure 2. ADS-942 Timing Diagram 3 ADS-942 Table 2. Zero and Gain Adjustments Zero Adjust Gain Adjust +1/2 LSB FS – 1½ LSB +305µV +9.999085V +305µV +4 ...

Page 4

... ANALOG INPUT 4 SIGNAL GROUND CODING SELECT START CONVERT 1 +10V REF. OUT ENABLE BIPOLAR Figure 3. ADS-942 Connection Diagram adjustment. Use a 20k ADJUST (pin 5) for zero/offset adjustment. Connect pin 5 to trimpot in ANALOG GROUND (pin 6) for operation without zero/offset adjustment. Table 3. Output Coding COMP. BINARY ...

Page 5

... 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. 0.2 0.3 0.4 0.5 0.6 Frequency (MHz) (fs = 2MHz, fin = 490kHz, Vin = –0.5dB, 16,384-point FFT) Figure 4. FFT Analysis of ADS-942 5 ADS-942 0.7 0.8 0.9 1 ...

Page 6

... Lead Material: Kovar alloy Lead Finish: 50 microinches (minimum) gold plating over 100 microinches (nominal) nickel plating +0.002 0.010 –0.001 (0.254) 0.900 ±0.010 0.100 (22.860) (2.540) Evaluation Board (without ADS-942) Heat Sink for all ADS-942 models DS-0228B ® 10/96 ...

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