AD6645: 14-Bit, 80 MSPS/105 MSPS A/D Converter Data Sheet (Rev. E)2/2/2002972K
Features and Benefits
- SNR = 75 dB, fIN 15 MHz, up to 105 MSPS
- SNR = 72 dB, fIN 200 MHz, up to 105 MSPS
- SFDR = 89 dBc, fIN 70 MHz, up to 105 MSPS
- 100 dBFS multitone SFDR
- IF sampling to 200 MHz
- Sampling jitter: 0.1 ps
- 1.5 W power dissipation
- Differential analog inputs
- Pin compatible to AD6644
- Twos complement digital output format
- 3.3 V CMOS compatible
- Data-ready for output latching
The AD6645 is a high speed, high performance, monolithic 14-bit analog-to-digital converter (ADC). All necessary functions, including track-and-hold (T/H) and reference, are included on the chip to provide a complete conversion solution. The AD6645 provides CMOS-compatible digital outputs. It is the fourth generation in a wideband ADC family, preceded by the AD9042 (12-bit, 41 MSPS), the AD6640 (12-bit, 65 MSPS, IF sampling), and the AD6644 (14-bit, 40 MSPS/65 MSPS).
Designed for multichannel, multimode receivers, the AD6645 is part of the Analog Devices, Inc., SoftCell® transceiver chipset. The AD6645 maintains 100 dB multitone, spurious-free dynamic range (SFDR) through the second Nyquist band. This breakthrough performance eases the burden placed on multimode digital receivers (software radios) that are typically limited by the ADC. Noise performance is exceptional; typical signal-to-noise ratio (SNR) is 74.5 dB through the first Nyquist band.
The AD6645 is built on the Analog Devices extra fast complementary bipolar (XFCB) process and uses an innovative, multipass circuit architecture. Units are available in a 52-lead exposed pad (TQFP_EP) package specified from −40°C to +85°C at 80 MSPS and −10°C to +85°C at 105 MSPS.
- IF Sampling. The AD6645 maintains outstanding ac performance up to input frequencies of 200 MHz, suitable for multicarrier 3G wideband cellular IF sampling receivers.
- Pin Compatibility. The ADC has the same footprint and pin layout as the AD6644 14-bit, 40 MSPS/65 MSPS ADC.
- SFDR Performance and Oversampling. Multitone SFDR performance of 100 dBFS can reduce the requirements of high end RF components.
- Multichannel, multimode receivers
- Base station infrastructures
- AMPS, IS-136, CDMA, GSM, W-CDMA
- Single channel digital receivers
- Antenna array processing
- Communications instrumentation
- Radars, infrared imaging
Markets and Technologies
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
This page contains evaluation board documentation and ordering information for evaluating the AD6645.
Documentation & Resources
AN-905: VisualAnalog™ Converter Evaluation Tool Version 1.0 User Manual8/18/2020
AN-1576: Low Jitter Sampling Clock Generator for High Performance ADCs Using the AD9958 500 MSPS DDS or the AD9858 1 GSPS DDS and the AD9515 Clock Distribution IC (Rev. A)9/4/2018148 K
AN-835: Understanding High Speed ADC Testing and Evaluation (Rev. B)5/12/2015985 kB
AN-501: Aperture Uncertainty and ADC System Performance (Rev. A)2/14/2015227 K
AN-282: Fundamentals of Sampled Data Systems2/14/20152131 kB
AN-756: Sampled Systems and the Effects of Clock Phase Noise and Jitter (Rev. 0)2/14/2015291K
AN-935: Designing an ADC Transformer-Coupled Front End (Rev. 0)2/14/2015363 kB
AN-345: Grounding for Low-and-High-Frequency Circuits2/14/2015455 kB
AN-586: LVDS Outputs for High Speed A/D Converters (Rev. 0)2/14/2015207 kB
AN-1142: Techniques for High Speed ADC PCB Layout (Rev. 0)2/2/2012392 kB
AN-737: How ADIsimADC Models an ADC (Rev. B)11/9/2007373 kB
AN-807: Multicarrier WCDMA Feasibility (Rev. 0)11/9/2007969 kB
AN-808: Multicarrier CDMA2000 Feasibility (Rev. 0)11/9/20071535 kB
AN-715: A First Approach to IBIS Models: What They Are and How They Are Generated (Rev. 0)12/14/2004370K
AN-741: Little Known Characteristics of Phase Noise (Rev. 0)11/29/20041679 kB
Ball Aerospace Case Study2/14/2015
Military Products by GENERIC Part Number1/22/200916 kB
Military Part Cross-Reference Guide1/22/200929 kB
Military Products by Function1/22/20097 kB
Maximizing the Dynamic Range of Software-Defined Radio11/1/2014
Designing Power Supplies for High Speed ADC2/1/2012
Analog-to-Digital Converter Clock Optimization: A Test Engineering Perspective2/1/2008 Analog Dialogue
Converters for 3G are Optimized for Cost, Size and Power4/6/2006
ADC Input Noise: The Good, The Bad, and The Ugly. Is No Noise Good Noise?2/1/2006 Analog Dialogue
Pushing the State of the Art with Multichannel A/D Converters5/1/2005 Analog Dialogue
Cascaded Transformers Achieve Better Frequency Performance in High-Speed ADC4/1/2005
Transformer-Coupled Front-End for Wideband A/D Converters4/1/2005 Analog Dialogue
Buffer Adapts Single-ended Signals for Differential Inputs2/1/2004
Advanced Digital Post-Processing Techniques Enhance Performance in Time-Interleaved ADC Systems8/1/2003 Analog Dialogue
Correlating High-Speed ADC Performance to Multicarrier 3G Requirements6/1/2003
DNL and Some of its Effects on Converter Performance6/1/2001
Tools & Simulations
Virtual Eval - BETA
Virtual Eval is a web application to assist designers in product evaluation of ADCs, DACs, and other ADI products. Using detailed models on Analog’s servers, Virtual Eval simulates crucial part performance characteristics within seconds. Configure operating conditions such as input tones and external jitter, as well as device features like gain or digital down-conversion. Performance characteristics include noise, distortion, and resolution, FFTs, timing diagrams, response plots, and more.
AD6645 IBIS Models
For designers who are selecting or evaluating high speed ADCs, VisualAnalog™ is a software package that combines a powerful set of simulation and data analysis tools with a user-friendly graphical interface.
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|
|AD6645ASVZ-105||Material Declaration||Reliability Data||52-Lead TQFP (10mm x 10mm w/ EP)|
|AD6645ASVZ-80||Material Declaration||Reliability Data||52-Lead TQFP (10mm x 10mm w/ EP)|
|Wafer Fabrication Data|
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.