VSP1221

12 位 21MSPS 单通道 AFE，用于 CCD 传感器

The 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.

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

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Low Power: 70 mW Minimum Power-Down Mode: 4 mW

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Low Input-Referred Noise: 75-dB SNR Typical at 0-dB Gain

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Novel Optical-Black OB Calibration

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Low-Aperture Delay

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Single 3-V Supply Operation

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DNL: <±0.5 LSB and <±1.5 LSB Typical at 0-dB Gain

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Programmable-Gain Range: 0 dB to 36 dB, Gain Resolution of 0.05 dB/Step

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48-Pin TQFP Package

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applications

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Digital Still Camera

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Digital Video Camera