INNOVATION and EX C ELL E N C E
® ® ADS-CCD1201
12-Bit, 1.2MHz, Sampling A/D’s
Optimized for CCD Applications
GENERAL DESCRIPTION
The functionally complete, easy-to-use ADS-CCD1201 is a
12-bit, 1.2MHz Sampling A/D Converter whose performance
and production testing have been optimized for use in
electronic imaging applications, particularly those employing
charge coupled devices (CCD’s) as their photodetectors. The
ADS-CCD1201 delivers the lowest noise (400µVrms) and the
best differential nonlinearity error (±0.35LSB max.) 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-CCD1201 requires ±15V (or ±12V) and +5V supplies and
typically consumes 1.7 (1.4) 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-CCD1201 can be supplied without its internal sample-
Figure 1. ADS-CCD1201 Functional Block Diagram
INPUT/OUTPUT CONNECTIONS
PIN FUNCTION PIN FUNCTION
1 BIT 12 (LSB) 24 –12V/–15V SUPPLY
2 BIT 11 23 GROUND
3 BIT 10 22 +12V/+15V SUPPLY
4 BIT 9 21 +10V REFERENCE OUT
5 BIT 8 20 ANALOG INPUT
6 BIT7 19 GROUND
7 BIT 6 18 NO CONNECT
8 BIT 5 17 NO CONNECT
9 BIT 4 16 START CONVERT
10 BIT 3 15 EOC
11 BIT 2 14 GROUND
12 BIT 1 (MSB) 13 +5V SUPPLY
• Unipolar input range (0 to +10V)
• 1.2MHz sampling rate
• 4096-to-1 dynamic range (72.2dB)
• Low noise, 400µVrms (1/6 of an LSB)
• Outstanding differential nonlinearity error (±0.35 LSB max.)
• Small, 24-pin ceramic DDIP
• Low power, 1.7 Watts
• Operates from ±12V or ±15V supplies
• Edge-triggered, no pipeline delay
FEATURES
hold amplifier. DATEL will also entertain discussions about
including the CDS circuit internal to the ADS-CCD1201. Please
contact us for more details.
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
FLASH
ADC
REF
DAC
REGISTER
REGISTER
DIGITAL
CORRECTION
LOGIC
12 BIT 1 (MSB)
11 BIT 2
10 BIT 3
9 BIT 4
8 BIT 5
7 BIT 6
6 BIT 7
5 BIT 8
4 BIT 9
3 BIT 10
2 BIT 11
1 BIT 12 (LSB)
TIMING AND
CONTROL LOGIC
ANALOG INPUT 20
START CONVERT 16
EOC 15
13
+5V SUPPLY
17, 18
NO CONNECT
22
+12V/+15V SUPPLY
14, 19, 23
GROUND
24
–12V/–15V SUPPLY
S1 S2
S/H
BUFFER
–
+
+10V REFERENCE 21