Document
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VSP 210 1
VSP2101
CCD SIGNAL PROCESSOR For Digital Cameras
TM
FEATURES
q CCD SIGNAL PROCESSING: Correlated Double Sampling Black Level Clamping –2 to +34dB Gain Ranging High SNR: 53dB q 10-BIT A/D CONVERSION: Up to 27MHz Conversion Rate No Missing Codes q PORTABLE OPERATION: Low Voltage: 2.7V to 3.6V Low Power: 190mW at 3.0V q LOW POWER: 160mW at 2.7V q POWER-DOWN MODE: 18mW
DESCRIPTION
The VSP2101Y is a complete digital camera IC, providing signal conditioning and 10-bit analog-to-digital conversion for the output of a CCD array. The primary CCD channel provides correlated double sampling to extract the video information from the pixels, –2dB to +34dB gain ranging with digital control for varying illumination conditions, and black level clamping for an accurate black reference. Input signal clamping and offset correction of the CDS is also performed. The stable gain control is linear in dB. Additionally, the black level is quickly recovered after gain change. An on-chip general purpose 10-bit digital-to-analog converter allows you to obtain analog control voltage for iris control. The VSP2101Y is available in a 48-lead LQFP package and operates from a single +3V supply.
APPLICATIONS
q q q q VIDEO CAMERAS DIGITAL STILL CAMERAS PC CAMERAS SECURITY CAMERAS
REFCK DATCK WRT SD SCLK
DAC OUT
OB
ADCK
DRVDD
C
Serial Port Register
10-Bit D/A Converter (DAC1) A/D Timing Control 10-Bit D/A Converter (DAC0) Black Level Auto-Zero
CCD D
Correlated Double Sampling Clamp
+6dB
Log VCA
+28dB
10-Bit A/D Converter
Output Latch
10-Bit Digital Output
CCD Out CCD R
Dummy Pixel Auto- Zero
A/D Reference
DUMC
International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111 Twx: 910-952-1111 • Internet: http://www.burr-brown.com/ • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
©
1998 Burr-Brown Corporation
PDS-1506B
Printed in U.S.A. June, 1999
SPECIFICATIONS
At TA = +25°C, all power supply voltages = +3.0V, and conversion rate = 18MHz, unless otherwise specified. VSP2101Y PARAMETER RESOLUTION DIGITAL INPUT Logic Family Logic Levels Logic Currents A/D Clock Duty Cycle Input Capacitance DIGITAL OUTPUT Logic Family Logic Levels ANALOG OUTPUT General Purpose D/A Converter Output Minimum Output Voltage Maximum Output Voltage DAC Settling TIme TRANSFER CHARACTERISTICS Differential Non-Linearity Integral Non-Linearity No Missing Codes Signal Settling Time Conversion Rate Data Latency Signal-to-Noise Ratio(1) CCD Offset Correction Range Black Clamp Level CDS Data Settling Time to ±0.1% for FS Change with RS = 40 Input Signal Level for FS Out Input Capacitance Input Time Constant INPUT CLAMP Clamp-On Resistance Clamp Level GAIN CONTROL CHARACTERISTICS Gain, max Gain, min Gain Control Linearity Gain Control Settling Time POWER SUPPLY Rated Voltage Quiescent Current Power Dissipation Power-Down Mode TEMPERATURE RANGE Specified Range Thermal Resistance, θJA 48-Lead LQFP NOTE: (1) SNR = 20log (full-scale voltage/rms noise). Ambient Control Data = 0 Control Data = 1023 32 CONDITIONS MIN TYP 10 CMOS Logic HI Logic LO Logic HI, VIN = +3V Logic LO, VIN = 0V 2.5 +0.4 10 10 50 5 CMOS Logic HI, CL = 10pF Logic LO, CL = 10pF 2.5 +0.4 V V V V µA µA % pF MAX UNITS Bits
Control Data = 1023 Control Data = 0
0.3 2.4 1.0 ±0.5 2.0 Guaranteed
V V µs LSB LSB 110 ns MHz Clocks dB mV LSB ns mV pF ps kΩ V dB dB dB µs +3.6 V mA mW mW °C °C/W
Black to Full-Scale Change to 1/4 LSB into A/D 500kHz Grounded Input Cap, Maximum Gain 5.5 53 ±150 32 11 600 20 300 3.3 1.2 34 –2 ±1.0 10 +3.0 63 190 18
27
From Leading Edge of DATCK Minimum Gain DATCK LOW
+2.7
–25 100
+85
The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject to change without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant any BURR-BROWN product for use in life support devices and/or systems.
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VSP2101
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ABSOLUTE MAXIMUM RATINGS
Power Supply (+VS) ............................................................................. +6V Analog Input .............................................................. –0.3V to (+VS +0.3V) Logic Input ............................................................... –0.3V to (+VS +0.3V) Case Temperature ......................................................................... +100°C Junction Temperature .................................................................... +150°C Storage Temperature ...................................................... –40°C to +150°C
ELECTROSTATIC DISCHARGE SENSITIVITY
This integra.