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AD6640 Dataheets PDF



Part Number AD6640
Manufacturers Analog Devices
Logo Analog Devices
Description 12-Bit/ 65 MSPS IF Sampling A/D Converter
Datasheet AD6640 DatasheetAD6640 Datasheet (PDF)

a FEATURES 65 MSPS Minimum Sample Rate 80 dB Spurious-Free Dynamic Range IF-Sampling to 70 MHz 710 mW Power Dissipation Single +5 V Supply On-Chip T/H and Reference Twos Complement Output Format 3.3 V or 5 V CMOS-Compatible Output Levels APPLICATIONS Cellular/PCS Base Stations Multichannel, Multimode Receivers GPS Anti-Jamming Receivers Communications Receivers Phased Array Receivers PRODUCT DESCRIPTION AIN AIN VREF ENCODE ENCODE 12-Bit, 65 MSPS IF Sampling A/D Converter AD6640 FUNCTIONAL BLOCK.

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a FEATURES 65 MSPS Minimum Sample Rate 80 dB Spurious-Free Dynamic Range IF-Sampling to 70 MHz 710 mW Power Dissipation Single +5 V Supply On-Chip T/H and Reference Twos Complement Output Format 3.3 V or 5 V CMOS-Compatible Output Levels APPLICATIONS Cellular/PCS Base Stations Multichannel, Multimode Receivers GPS Anti-Jamming Receivers Communications Receivers Phased Array Receivers PRODUCT DESCRIPTION AIN AIN VREF ENCODE ENCODE 12-Bit, 65 MSPS IF Sampling A/D Converter AD6640 FUNCTIONAL BLOCK DIAGRAM AVCC DVCC BUF TH1 TH2 TH3 A ADC +2.4V REFERENCE INTERNAL TIMING ADC 6 DAC AD6640 7 DIGITAL ERROR CORRECTION LOGIC MSB LSB D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 GND PRODUCT HIGHLIGHTS The AD6640 is a high speed, high performance, low power, monolithic 12-bit analog-to-digital converter. All necessary functions, including track-and-hold (T/H) and reference are included on-chip to provide a complete conversion solution. The AD6640 runs on a single +5 V supply and provides CMOScompatible digital outputs at 65 MSPS. Specifically designed to address the needs of multichannel, multimode receivers, the AD6640 maintains 80 dB spuriousfree dynamic range (SFDR) over a bandwidth of 25 MHz. Noise performance is also exceptional; typical signal-to-noise ratio is 68 dB. The AD6640 is built on Analog Devices’ high speed complementary bipolar process (XFCB) and uses an innovative multipass architecture. Units are packaged in a 44-terminal Plastic Thin Quad Flatpack (TQFP) specified from –40°C to +85°C. 1. Guaranteed sample rate is 65 MSPS. 2. Fully differential analog input stage specified for frequencies up to 70 MHz; enables “IF Sampling.” 3. Low power dissipation: 710 mW off a single +5 V supply. 4. Digital outputs may be run on +3.3 V supply for easy interface to digital ASICs. 5. Complete Solution: reference and track-and-hold. 6. Packaged in small, surface mount, plastic 44-terminal TQFP. REV. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 World Wide Web Site: http://www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 1998 AD6640–SPECIFICATIONS DC SPECIFICATIONS (AV Parameter RESOLUTION ACCURACY No Missing Codes Offset Error Gain Error Differential Nonlinearity (DNL)1 Integral Nonlinearity (INL)1 TEMPERATURE DRIFT Offset Error Gain Error POWER SUPPLY REJECTION (PSRR) REFERENCE OUT (VREF) 2 CC = +5 V, DVCC = +3.3 V; TMIN = –40؇C, TMAX = +85؇C) Temp Test Level Min AD6640AST Typ 12 +25°C Full Full +25°C Full Full Full Full Full Full Full Full +25°C I VI VI I V V V V V V V IV V GUARANTEED 3.5 4.0 ± 0.5 ± 1.25 50 100 ± 0.5 2.4 VREF ± 0.05 2.0 0.9 1.5 Ma.


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