ADS-942AMC 查看數據表（PDF） - DATEL Data Acquisition products
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ADS-942AMC Datasheet PDF : 6 Pages
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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
ADS-942A
14-Bit, 2MHz, Low-Power
Sampling A/D Converters
INPUT/OUTPUT CONNECTIONS
PIN FUNCTION
1
+10V REF. OUT
2
BIPOLAR
3
AVALOG INPUT
4
SIGNAL GROUND
5
OFFSET ADJUST
6
ANALOG GROUND
7
OVERFLOW
8
CODING SELECT
9
ENABLE
10 +5V SUPPLY
11 DIGITAL GROUND
12 +15V SUPPLY
13 –15V SUPPLY
14 –5V SUPPLY
15 ANALOG GROUND
16 EOC
PIN FUNCTION
32 START CONVERT
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)
+10V REF. OUT 1
OFFSET ADJUST 5
BIPOLAR 2
ANALOG INPUT 3
OFFSET
CIRCUIT
S/H
REF
S2
FLASH
ADC
S1
BUFFER
DAC
START CONVERT 32
EOC 16
TIMING AND
CONTROL LOGIC
4
SIGNAL
GROUND
10
+5V
SUPPLY
11
DIGITAL
GROUND
12
+15V
SUPPLY
13
–15V
SUPPLY
14
–5V
SUPPLY
6, 15
ANALOG
GROUND
Figure 1. ADS-942A Functional Block Diagram
8
CODING
SELECT
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
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
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