VSP1221中文资料适用于 CCD 传感器的 12 位 21MSPS 单通道 AFE数据手册TI规格书

描述 Description

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.

特性 Features

• 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: