Maker : Analog Devices
Part No. : AD9260EB

  Datasheet PDF : AD9260EB.pdf
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Product Information

a FEATURES Monolithic 16-Bit, Oversampled A/D Converter 8 Oversampling Mode, 20 MSPS Clock 2.5 MHz Output Word Rate 1.01 MHz Signal Passband w/0.004 dB Ripple Signal-to-Noise Ratio: 88.5 dB Total Harmonic Distortion: –96 dB Spurious Free Dynamic Range: 100 dB Input Referred Noise: 0.6 LSB Selectable Oversampling Ratio: 1 , 2 , 4 , 8 Selectable Power Dissipation: 150 mW to 585 mW 85 dB Stopband Attenuation 0.004 dB Passband Ripple Linear Phase Single +5 V Analog Supply, +5 V/+3 V Digital Supply Synchronize Capability for Parallel ADC Interface Twos-Complement Output Data 44-Lead MQFP High-Speed Oversampling CMOS ADC with 16-Bit Resolution at a 2.5 MHz Output Word Rate AD9260 FUNCTIONAL BLOCK DIAGRAM DRVDD AVDD AVDD AVDD AVSS AVSS AVSS DRVSS RESET/ SYNC DVSS DVDD VINA MULTIBIT SIGMA-DELTA MODULATOR DIGITAL DEMODULATOR 12-BIT: 20MHz STAGE 1:2X DECIMATION FILTER OTR VINB OUTPUT MODE MULTIPLEXER 16-BIT: 10MHz AD9260 16-BIT: 5MHz REFERENCE BUFFER STAGE 3:2X DECIMATION FILTER STAGE 2:2X DECIMATION FILTER OUTPUT REGISTER BIT1–BIT16 REF TOP REF BOTTOM COMMON MODE 16-BIT: 2.5MHz VREF SENSE REFCOM BANDGAP REFERENCE BIAS CIRCUIT CLOCK BUFFER MODE REGISTER DAV READ BIAS ADJUST CLK MODE CS PRODUCT DESCRIPTION The AD9260 is a 16-bit, high-speed oversampled analog-todigital converter (ADC) that offers exceptional dynamic range over a wide bandwidth. The AD9260 is manufactured on an advanced CMOS process. High dynamic range is achieved with an oversampling ratio of 8× through the use of a proprietary technique that combines the advantages of sigma-delta and pipeline converter technologies. The AD9260 is a switched-capacitor ADC with a nominal fullscale input range of 4 V. It offers a differential input with 60 dB of common-mode rejection of common-mode signals. The signal range of each differential input is ± 1 V centered on a 2.0 V common-mode level. The on-chip decimation filter is configured for maximum performance and flexibility. A series of three half-band FIR filter stages provide 8× decimation filtering with 85 dB of stopband attenuation and 0.004 dB of passband ripple. An onboard digital multiplexer allows the user to access data from the various stages of the decimation filter. The on-chip programmable reference and reference buffer amplifier are configured for maximum accuracy and flexibility. An external reference can also be chosen to suit the user’s specific dc accuracy and drift requirements. The AD9260 operates on a single +5 V supply, typically consuming 585 mW of power. A power scaling circuit is provided allowing the AD9260 to operate at power consumption levels as low as 150 mW at reduced clock and data rates. The AD9260 is available in a 44-lead MQFP package and is specified to operate over the industrial temperature range. PRODUCT HIGHLIGHTS The AD9260 is fabricated on a very cost effective CMOS process. High-speed, precision mixed-signal analog circuits are combined with high-density digital filter circuits. The AD9260 offers a complete single-chip 16-bit sampling ADC with a 2.5 MHz output data rate in a 44-lead MQFP. Selectable Internal Decimation Filtering—The AD9260 provides a high-performance decimation filter with 0.004 dB passband ripple and 85 dB of stopband attenuation. The filter is configurable with options for 1×, 2×, 4×, and 8× decimation. Power Scaling—The AD9260 consumes a low 585 mW of power at 16-bit resolution and 2.5 MHz output data rate. Its power can be scaled down to as low as 150 mW at reduced clock rates. Single Supply— Both of the analog and digital portions of the AD9260 can operate off of a single +5 V supply simplifying system power supply design. The digital logic will also accommodate a single +3 V supply for reduced power. REV. B 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 whi...

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