INNO VA T IO N a n d E X 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