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

• Resolution (Bits)
• 12
• Samples/sec (MSPS)
• 21
• Supply voltage (Max)
• 3.3
• Operating temperature range (C)
• 0 to 70
• Output data format
• CMOS Parallel

VSP1221的完整型号有：VSP1221PFB，以下是这些产品的关键参数及官网采购报价：

VSP1221PFB，工作温度：0 to 70，封装：TQFP (PFB)-48，包装数量MPQ：250个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网VSP1221PFB的批量USD价格：5.624（1000+）

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