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AD652 Datasheet

Part Number AD652
Manufacturers Analog Devices
Logo Analog Devices
Description Monolithic Synchronous Voltage-to-Frequency Converter
Datasheet AD652 DatasheetAD652 Datasheet (PDF)

Monolithic Synchronous Voltage-to-Frequency Converter AD652 FEATURES Full-scale frequency (up to 2 MHz) set by external system clock Extremely low linearity error (0.005% max at 1 MHz FS, 0.02% max at 2 MHz FS) No critical external components required Accurate 5 V reference voltage Low drift (25 ppm/°C max) Dual- or single-supply operation Voltage or current input MIL-STD-883 compliant versions available PRODUCT DESCRIPTION The AD652 synchronous voltage-to-frequency converter (SVFC) is a powerf.

  AD652   AD652






Part Number AD6549
Manufacturers MediaTek
Logo MediaTek
Description (AD6548 / AD6549) Single Chip GSM Radio
Datasheet AD652 DatasheetAD6549 Datasheet (PDF)

GSM850/900/1800/1900 Single Chip GSM Radio AD6548/9 FEATURES Fully Integrated GSM Transceiver including Direct Conversion Receiver 4 Differential LNAs Integrated Active RX Channel Select Filters Programmable Gain Baseband Amplifiers Translation Loop Direct VCO Modulator Integrated TX VCO and tank External TX filters eliminated Integrated Loop filter components High performance multi band PLL system Fast Fractional-N Synthesizer Integrated Local Oscillator VCO Fully Integrated Loop filters Cryst.

  AD652   AD652







Part Number AD6548
Manufacturers MediaTek
Logo MediaTek
Description (AD6548 / AD6549) Single Chip GSM Radio
Datasheet AD652 DatasheetAD6548 Datasheet (PDF)

GSM850/900/1800/1900 Single Chip GSM Radio AD6548/9 FEATURES Fully Integrated GSM Transceiver including Direct Conversion Receiver 4 Differential LNAs Integrated Active RX Channel Select Filters Programmable Gain Baseband Amplifiers Translation Loop Direct VCO Modulator Integrated TX VCO and tank External TX filters eliminated Integrated Loop filter components High performance multi band PLL system Fast Fractional-N Synthesizer Integrated Local Oscillator VCO Fully Integrated Loop filters Cryst.

  AD652   AD652







Part Number AD654
Manufacturers Analog Devices
Logo Analog Devices
Description Low Cost Monolithic Voltage-to-Frequency Converter
Datasheet AD652 DatasheetAD654 Datasheet (PDF)

a FEATURES Low Cost Single or Dual Supply, 5 V to 36 V, ؎5 V to ؎ 18 V Full-Scale Frequency Up to 500 kHz Minimum Number of External Components Needed Versatile Input Amplifier Positive or Negative Voltage Modes Negative Current Mode High Input Impedance, Low Drift Low Power: 2.0 mA Quiescent Current Low Offset: 1 mV Low Cost Monolithic Voltage-to-Frequency Converter AD654 FUNCTIONAL BLOCK DIAGRAM +VS 8 CT 7 CT 6 –VS 5 DRIVER OSC AD654 1 FOUT 2 LOGIC COMMON 3 RT 4 +VIN PRODUCT DESCRIPTI.

  AD652   AD652







Part Number AD6528
Manufacturers Analog Devices
Logo Analog Devices
Description GSM/GPRS Digital Baseband Processor
Datasheet AD652 DatasheetAD6528 Datasheet (PDF)

www.DataSheet4U.com GSM/GPRS Digital Baseband Processor For Smartphone and Wireless Handheld Devices Preliminary Technical Data FEATURES Complete Single Chip Programmable Digital Baseband Processor divided into three main subsystems: Control Processor Subsystem including: ® 32-bit MCU ARM7TDMI Control Processor On-chip System SRAM Memory DSP Subsystem including 16-bit Fixed Point DSP Processor Expanded Data and Program SRAM Program Instruction Cache Full Rate, Enhanced Full Rate and Half Rate .

  AD652   AD652







Monolithic Synchronous Voltage-to-Frequency Converter

Monolithic Synchronous Voltage-to-Frequency Converter AD652 FEATURES Full-scale frequency (up to 2 MHz) set by external system clock Extremely low linearity error (0.005% max at 1 MHz FS, 0.02% max at 2 MHz FS) No critical external components required Accurate 5 V reference voltage Low drift (25 ppm/°C max) Dual- or single-supply operation Voltage or current input MIL-STD-883 compliant versions available PRODUCT DESCRIPTION The AD652 synchronous voltage-to-frequency converter (SVFC) is a powerful building block for precision analog-todigital conversion, offering typical nonlinearity of 0.002% (0.005% maximum) at a 100 kHz output frequency. The inherent monotonicity of the transfer function and wide range of clock frequencies allow the conversion time and resolution to be optimized for specific applications. The AD652 is available in five performance grades. The 20-lead PLCC-packaged JP and KP grades are specified for operation over the 0°C to +70°C commercial temperature range. The 16-lead CERDIP-packaged AQ and BQ grades are specified for operation over the −40°C to +85°C industrial temperature range. The AD652SQ is available for operation over the full −55°C to +125°C extended temperature range. PRODUCT HIGHLIGHTS 1. The use of an external clock to set the full-scale frequency allows the AD652 to achieve linearity and stability far superior to other monolithic VFCs. By using the same clock to drive the AD652 and set the counting period (through a suitable divider), conver.


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