AD9645
Dual, 14-Bit, 80 MSPS/125 MSPS Serial LVDS 1.8 V Analog-to-Digital Converter
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Overview
Features and Benefits
- 1.8 V supply operation
- Low power: 122 mW per channel at 125 MSPS with scalable power options
- SNR = 74 dBFS (to Nyquist)
- SFDR = 91 dBc at 70MHz
- Serial LVDS (ANSI-644, default) and low power, reduced signal option (similar to IEEE 1596.3)
- 650 MHz full power analog bandwidth
- 2 Vp-p input voltage range
- See data sheet for additional features
Product Details
The AD9645 is a dual, 14-bit, 80 MSPS/125 MSPS analog-to- digital converter (ADC) with an on-chip sample-and-hold circuit designed for low cost, low power, small size, and ease of use. The product operates at a conversion rate of up to 125 MSPS and is optimized for outstanding dynamic performance and low power in applications where a small package size is critical.
The ADC requires a single 1.8 V power supply and LVPECL-/ CMOS-/LVDS-compatible sample rate clock for full performance operation. No external reference or driver components are required for many applications.
The ADC automatically multiplies the sample rate clock for the appropriate LVDS serial data rate. A data clock output (DCO) for capturing data on the output and a frame clock output (FCO) for signaling a new output byte are provided. Individual channel power-down is supported; the AD9645 typically consumes less than 2 mW in the full power-down state. The ADC provides several features designed to maximize flexibility and minimize system cost, such as programmable output clock and data alignment and digital test pattern generation. The available digital test patterns include built-in deterministic and pseudorandom patterns, along with custom user-defined test patterns entered via the serial port interface (SPI).
The AD9645 is available in a RoHS-compliant, 32-lead LFCSP. It is specified over the industrial temperature range of −40°C to +85°C. This product is protected by a U.S. patent.
PRODUCT HIGHLIGHTS
- Small Footprint. Two ADCs are contained in a small, spacesaving package.
- Low Power. The AD9645 uses 122 mW/channel at 125 MSPS with scalable power options.
- Pin Compatibility with the AD9635, a 12-Bit Dual ADC.
- Ease of Use. A data clock output (DCO) operates at frequencies of up to 500 MHz and supports double data rate (DDR) operation.
- User Flexibility. The SPI control offers a wide range of flexible features to meet specific system requirements.
APPLICATIONS
- Communications
- Diversity radio systems
- Multimode digital receivers GSM, EDGE, W-CDMA, LTE, CDMA2000, WiMAX, TD-SCDMA
- I/Q demodulation systems
- Smart antenna systems
- Broadband data applications
- Battery-powered instruments
- Hand held scope meters
- Portable medical imaging and ultrasound
- Radar/LIDAR
Product Categories
Product Lifecycle
Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
Documentation & Resources
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AN-905: VisualAnalog™ Converter Evaluation Tool Version 1.0 User Manual8/18/2020
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AN-878: High Speed ADC SPI Control Software (Rev. A)3/20/2018PDF585 kB
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AN-835: Understanding High Speed ADC Testing and Evaluation (Rev. B)5/12/2015PDF985 kB
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AN-501: Aperture Uncertainty and ADC System Performance (Rev. A)2/14/2015PDF227 K
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AN-756: Sampled Systems and the Effects of Clock Phase Noise and Jitter (Rev. 0)2/14/2015PDF291K
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AN-827: A Resonant Approach to Interfacing Amplifiers to Switched-Capacitor ADCs (Rev. 0)2/14/2015PDF203 kB
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AN-935: Designing an ADC Transformer-Coupled Front End (Rev. 0)2/14/2015PDF363 kB
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AN-742: Frequency Domain Response of Switched-Capacitor ADCs (Rev. C)2/14/2015PDF427 K
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AN-1142: Techniques for High Speed ADC PCB Layout (Rev. 0)2/2/2012PDF392 kB
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AN-737: How ADIsimADC Models an ADC (Rev. B)11/9/2007PDF373 kB
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AN-807: Multicarrier WCDMA Feasibility (Rev. 0)11/9/2007PDF969 kB
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AN-808: Multicarrier CDMA2000 Feasibility (Rev. 0)11/9/2007PDF1535 kB
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AD9655/AD9645/AD9635 Evaluation Documentation2/12/2013WIKI
Tools & Simulations
Virtual Eval - BETA
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MathWorks®
S-Parameters
XLS
AD9645 S-Parameters
741 kB
Design Tools
Visual Analog
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.
Product Recommendations
AD9645 Companion Parts
Design Resources
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.
PCN-PDN Information
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AD9645 Discussions
Sample & Buy
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Evaluation Boards
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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.