Overview
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
Product Details
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.
Product Highlights
- 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.
Applications
- 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
- Instrumentation
Product Categories
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)
Documentation
Application Notes (15)
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.
MathWorks®
Design Tools
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.
Reference Materials
Customer Case Studies (1)
Cross Reference Guides (3)
Technical Articles (12)
Analog Dialogue
Analog Dialogue
Design Resources
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PCN-PDN Information
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