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.

Designed in advanced CMOS process, the TLV990-21 operates from a single 3-V power supply with a normal power consumption of 150 mW at 21 MSPS and 2 mW in power-down mode.

Its very high throughput rate, single 3-V operation, very low-power consumption, and fully-integrated analog-processing circuitry make the TLV990-21 an ideal CCD signal-processing solution for digital still cameras and electronic video camcorder applications.

This device is available in a 48-pin TQFP package and is specified over a -20°C to 75°C operating-temperature range.

• 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