®
®
ADS-CCD1202
12-Bit, 2MHz, Sampling A/D’s
for CCD Imaging Applications
IN N O VA T IO N a n d E X C E L L E N C E
FEATURES
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Unipolar input range (0 to +10V)
2MHz sampling rate
4096-to-1 dynamic range (72.2dB)
Low noise, 600µVrms (1/4 of an LSB)
Outstanding differential nonlinearity error (±0.45 LSB max.)
Small, 24-pin ceramic DDIP
Low power, 1.75 Watts
Operates from ±12V or ±15V supplies
Edge-triggered, no pipeline delay
Low cost
GENERAL DESCRIPTION
The functionally complete, easy-to-use ADS-CCD1202 is a
12-bit, 2MHz Sampling A/D Converter whose performance
and production testing have been optimized for use in CCD
applications. This device delivers the lowest noise (600µVrms)
and the best differential linearity error (±0.45LSB maximum) of
any commercially available 12-bit A/D in its speed class. It can
respond to full scale input steps (from empty to full well) with
less than a single count of error, and its input is immune to
overvoltages that may occur due to blooming.
Packaged in an industry-standard, 24-pin, ceramic DDIP, the
ADS-CCD1202 requires ±15V (or ±12V) and +5V supplies and
typically consumes 1.75 (1.45) Watts. The device is 100%
production tested for all critical performance parameters and is
fully specified over both the 0 to +70°C and –55 to +125°C
operating temperature ranges.
For those applications using correlated double sampling, the
ADS-CCD1202 can be supplied without its internal sample-
hold amplifier and achieve conversion rates up to 2.5MHz.
PIN
1
2
3
4
5
6
7
8
9
10
11
12
INPUT/OUTPUT CONNECTIONS
FUNCTION
BIT 12 (LSB)
BIT 11
BIT 10
BIT 9
BIT 8
BIT7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1 (MSB)
PIN
24
23
22
21
20
19
18
17
16
15
14
13
FUNCTION
–12V/–15V SUPPLY
GROUND
+12V/+15V SUPPLY
+10V REFERENCE OUT
ANALOG INPUT
GROUND
NO CONNECT
NO CONNECT
START CONVERT
EOC
GROUND
+5V SUPPLY
DATEL will also entertain discussions about including the CDS
circuit internal to the ADS-CCD1202. Contact us for details.
–
ANALOG INPUT 20
S/H
+
S1
S2
DAC
12 BIT 1 (MSB)
11 BIT 2
+10V REFERENCE 21
REF
10 BIT 3
9
8
REGISTER
DIGITAL
CORRECTION
LOGIC
7
6
5
FLASH
ADC
BUFFER
REGISTER
4
3
2
1
BIT 4
BIT 5
BIT 6
BIT 7
BIT 8
BIT 9
BIT 10
BIT 11
BIT 12 (LSB)
START CONVERT 16
EOC 15
TIMING AND
CONTROL LOGIC
13
+5V SUPPLY
17, 18
NO CONNECT
22
+12V/+15V SUPPLY
14, 19, 23
GROUND
24
–12V/–15V SUPPLY
Figure 1. ADS-CCD1202 Functional Block Diagram
DATEL, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 (U.S.A.)
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Tel: (508) 339-3000 Fax: (508)339-6356
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For immediate assistance: (800) 233-2765
MURATA-PS [ MURATA POWER SOLUTIONS INC. ]
