VSP1221 Texas instruments

VSP1221

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VSP1221

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Описание

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
Sample rate (Msps)	21
Gain (min) (dB)	0
Gain (max) (dB)	36
Pd (typ) (mW)	90
Supply voltage (max) (V)	3.3
Operating temperature range (°C)	0 to 70
Output data format	CMOS Parallel
Rating	Catalog