AFE Video 1ADC 12-Bit 2.5V/3V 48-Pin TQFP Tray

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 a 12-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 eight-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.

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 <±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

applications

• Digital Still Camera
• Digital Video Camera