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 PackageApplication Digital Still Camera
Video CamcorderPinout
SpecificationsSupply voltage, AVDD, DVDD, DIVDD . . . . . . . . . . . . . . . . .... . . . . . . . 0.3 V to 6.5 V
Analog input voltage range . . . . . . . . . . . . . . . . . . . . . . . .. . . 0.3 V to AVDD+0.3 V
Digital input voltage range . . . . . . . . . . . . . . . . . . . . .. . . .. . . 0.3 V to DVDD+0.3 V
Operating virtual junction temperature range, TJ . . . . . . .. . . ... . . . . 40 to 150
Operating free-air temperature range, TA . . . . . . . . . . .. . .. . .. . . . .. . 20 to 75
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . ... . . . . . .. 65 to 150
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . .. .. . . . . . 260
† Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the evice.These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
DescriptionThe 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.
TLV990-21 Data Sheet
