3 -V ， 10位， 21 - MSPS区CCD模拟前端 3-V,10-BIT,21-MSPS AREA CCD ANALOG FRONT END
description
The TLV990-21 is a complete CCD signal processor/digitizer designed for digital still camera and PC camera applications. The TLV990-21 performs all the analog-processing functions necessary to maximize the dynamic range, corrects various errors associated with the CCD sensor, and then digitizes the results with an on-chip high-speed analog-to-digital converter ADC.
The key components of the TLV990-21 include: an input clamp circuit for CCD signal, a correlated double sampler CDS, a programmable-gain amplifier PGA with 0 to 36-dB gain range, two internal digital-to-analog converters DAC for automatic or programmable optical black level and offset calibration, a 10-bit, 21-MSPS pipeline ADC, a parallel data port for easy microprocessor interface, a serial port for configuring internal control registers, two additional DACs for external system control, and internal reference voltages.
features
• Single-Chip CCD Analog Front-End
• 10-Bit, 21-MSPS, Single 3-V Supply Operation A/D Converter
• Very Low Power: 150-mW Typical, 2-mW Power-Down Mode
• Differential Nonlinearity Error:
< ±0.5 LSB Typical
• Integral Nonlinearity Error:
< ±0.75 LSB Typical
• Programmable Gain Amplifier PGA With 0-dB to 36-dB Gain Range 0.045 dB/Step
• Automatic or Programmable Optical Black Level and Offset Calibration With Digital Filter and Bad Pixel Limits
• Additional DACs for External Analog Setting
• Serial Interface for Register Configuration
• Internal-Reference Voltages
• 48-Pin TQFP Package
application
• Digital Still Camera
• Video Camcorder
