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PIN ASSIGNMENTS

APPLICATIONS

DESCRIPTION

14 15

DACO2

AVSS

DACO1

AVDD

TP2

PIN

DIN

TP1

CLREF

AVDD

AVSS

VSS

36

35

34

33

32

31

30

29

28

27

26

25

16

1

2

3

4

5

6

7

8

9

10

11

12

D0/SDO

D1

D2

D3

D4

D5

D6

D7

D8

D9

D10

D11

17 18 19 20

47 46 45 44 43

48

42

40 39 38

41

21 22 23 24

37

13

PACKAGE

(TOP VIEW)

VSP1221

SLES012A – SEPTEMBER 2001 – REVISED JULY 2004

12-BIT, 21-MSPS, ULTRALOW-POWER

CCD SIGNAL PROCESSOR

•

12-Bit, 21-MSPS, Analog-to-Digital

Converter

•

Low Power: 70 mW Minimum

Power-Down Mode: 4 mW

•

Low Input-Referred Noise: 75-dB

SNR Typical at 0-dB Gain

•

Novel Optical-Black (OB) Calibration

•

Low-Aperture Delay

•

Single 3-V Supply Operation

•

DNL: <

±0.5 LSB and

INL: <

±1.5 LSB Typical at 0-dB Gain

•

Programmable-Gain Range: 0 dB to 36 dB,

Gain Resolution of 0.05 dB/Step

•

48-Pin TQFP Package

•

Digital Still Camera

•

Digital Video Camera

The VSP1221 is a highly-integrated mixed-signal IC

used for signal conditioning and analog-to-digital

conversion at the output of a CCD array. The IC has

a correlated double sampler (CDS) and an analog

programmable-gain amplifier (PGA) stage followed by

an analog-to-digital converter (ADC) and a digital

PGA stage. The CDS is used to sample the CCD

signal and is followed by the analog PGA stage. The

ADC is a12-bit, 21-MSPS pipelined ADC. The digital

PGA provides further amplification.

Additionally, there is an offset calibration loop for

optical-black correction. The optical-black reference

level is user-programmable. The chip also has two

8-bit digital-to-analog converters (DAC) for external

analog settings.

The chip has a serial port for configuring internal

control registers.

The VSP1221 is available in a 48-pin TQFP package

and operates from a single 3-V power supply.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Copyright © 2001–2004, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.