Features and Benefits
Product DetailsThe AD9267 is a dual continuous time (CT) sigma-delta (Σ-Δ) modulator with -88 dBc of dynamic range over 10 MHz real or 20 MHz complex bandwidth. The combination of high dynamic range, wide bandwidth, and characteristics unique to the continuous time Σ-Δ modulator architecture makes the AD9267 an ideal solution for wireless communication systems.
The AD9267 has a resistive input impedance that significantly relaxes the requirements of the driver amplifier. In addition, a 32× oversampled fifth-order continuous time loop filter attenuates out-of-band signals and aliases, reducing the need for external filters at the input. The low noise figure of 15 dB relaxes the linearity requirements of the front-end signal chain components, and the high dynamic range reduces the need for an automatic gain control (AGC) loop.
A differential input clock controls all internal conversion cycles. An external clock input or the integrated integer-N PLL provides the 640 MHz internal clock needed for the oversampled conti- nuous time Σ-Δ modulator. The digital output data is presented as 4-bit, LVDS at 640 MSPS in twos complement format. A data clock output (DCO) is provided to ensure proper latch timing with receiving logic. Additional digital signal processing may be required on the 4-bit modulator output to remove the out-of-band noise and to reduce the sample rate.
The AD9267 operates on a 1.8 V power supply, consuming 416 mW. The AD9267 is available in a 64-lead LFCSP and is specified over the industrial temperature range (−40°C to +85°C).
- Continuous time Σ-Δ architecture efficiently achieves high dynamic range and wide bandwidth.
- Passive input structure reduces or eliminates the require- ments for a driver amplifier.
- An oversampling ratio of 32× and high order loop filter provide excellent alias rejection, reducing or eliminating the need for antialiasing filters.
- Operates from a single 1.8 V power supply.
- A standard serial port interface (SPI) supports various product features and functions.
- Features a low pin count, high speed LVDS interface with data output clock.
- Baseband quadrature receivers: CDMA2000, W-CDMA, multicarrier GSM/EDGE, 802.16x, and LTE
- Quadrature sampling instrumentation
Markets and Technologies
Product Lifecycle Not Recommended for New Designs
This designates products ADI does not recommend broadly for new designs.
Evaluation Kits (1)
The AD9267 evaluation board serves two purposes: as an evaluation platform for the 16-bit, dual, continuous time sigmadelta (Σ-Δ) modulator and as a direct conversion demonstration platform.
The AD9267 is a dual continuous time Σ-Δ modulator with −88 dBc of dynamic range over 10 MHz real or 20 MHz complex bandwidth. The combination of high dynamic range, wide bandwidth, and characteristics unique to the continuous time Σ-Δ modulator architecture makes the AD9267 an ideal solution for wireless communication systems.
Documentation & Resources
AN-905: VisualAnalog™ Converter Evaluation Tool Version 1.0 User Manual8/18/2020
AN-878: High Speed ADC SPI Control Software (Rev. A)3/20/2018585 kB
AN-835: Understanding High Speed ADC Testing and Evaluation (Rev. B)5/12/2015985 kB
AN-282: Fundamentals of Sampled Data Systems2/14/20152131 kB
AN-1142: Techniques for High Speed ADC PCB Layout (Rev. 0)2/2/2012392 kB
AN-807: Multicarrier WCDMA Feasibility (Rev. 0)11/9/2007969 kB
AN-808: Multicarrier CDMA2000 Feasibility (Rev. 0)11/9/20071535 kB
AN-812: MicroController-Based Serial Port Interface (SPI) Boot Circuit (Rev. 0)9/20/2006441 kB
• Software Download (zip, 21,702,560 bytes)
AN-283: Sigma-Delta ADCs and DACs9/24/20021699 kB
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
|Part Number||Material Declaration||Reliability Data||Pin/Package Drawing||CAD Symbols, Footprints & 3D Models|
|AD9267BCPZ||Material Declaration||Reliability Data||64-Lead LFCSP (9mm x 9mm w/ EP)|
|AD9267BCPZRL7||Material Declaration||Reliability Data||64-Lead LFCSP (9mm x 9mm w/ EP)|
|Wafer Fabrication Data|
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