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ADS-942A

Description
14-Bit, 2MHz, Low-Power Sampling A/D Converters
File Size77KB,6 Pages
ManufacturerETC
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ADS-942A Overview

14-Bit, 2MHz, Low-Power Sampling A/D Converters

®
®
ADS-942A
14-Bit, 2MHz, Low-Power
Sampling A/D Converters
FEATURES
14-bit resolution
2MHz minimum throughput
Low-power, 2.2 Watts
Functionally complete
Internal reference and S/H amplifier
78dB signal-to-noise ratio
Full Nyquist-rate sampling
Small 32-pin TDIP
GENERAL DESCRIPTION
DATEL's ADS-942A is a functionally complete, 14-bit, 2MHz,
sampling A/D converter. Packaged in a 32-pin TDIP, the unit
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/control logic
necessary to operate from a single start convert pulse.
The ADS-942A is optimized for wideband frequency-domain
applications and is fully FFT tested. The ADS-942A requires
±15V and ±5V supplies and typically consumes 2.2 Watts
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
INPUT/OUTPUT CONNECTIONS
FUNCTION
+10V REF. OUT
BIPOLAR
AVALOG INPUT
SIGNAL GROUND
OFFSET ADJUST
ANALOG GROUND
OVERFLOW
CODING SELECT
ENABLE
+5V SUPPLY
DIGITAL GROUND
+15V SUPPLY
–15V SUPPLY
–5V SUPPLY
ANALOG GROUND
EOC
PIN
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
FUNCTION
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)
DAC
31 BIT 1 OUT (MSB)
30 BIT 1 OUT (MSB)
+10V REF. OUT 1
OFFSET
CIRCUIT
S
2
FLASH
ADC
BIPOLAR 2
S
1
BUFFER
REF
DIGITAL CORRECTION LOGIC
3-STATE OUTPUT REGISTER
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)
START CONVERT 32
TIMING AND
CONTROL LOGIC
EOC 16
9 ENABLE
7 OVERFLOW
4
SIGNAL
GROUND
10
+5V
SUPPLY
11
DIGITAL
GROUND
12
+15V
SUPPLY
13
–15V
SUPPLY
14
–5V
SUPPLY
6, 15
ANALOG
GROUND
8
CODING
SELECT
OFFSET ADJUST 5
ANALOG INPUT 3
S/H
REGISTER
Figure 1. ADS-942A Functional Block Diagram
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
REGISTER

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Description 14-Bit, 2MHz, Low-Power Sampling A/D Converters 14-Bit, 2MHz, Low-Power Sampling A/D Converters 14-Bit, 2MHz, Low-Power Sampling A/D Converters
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