Overview
Features and Benefits
- SNR = 79.0 dBFS @ 70 MHz and 125 MSPS
- SFDR = 93 dBc @ 70 MHz and 125 MSPS
- Low power: 373 mW @ 125 MSPS
- 1.8 V analog supply operation
- 1.8 V CMOS or LVDS output supply
- Integer 1-to-8 input clock divider
- IF sampling frequencies to 300 MHz
- −154.3 dBm/Hz small signal input noise with 200 Ω input impedance @ 70 MHz and 125 MSPS
- Optional on-chip dither
- Programmable internal ADC voltage reference
- Integrated ADC sample-and-hold inputs
- Flexible analog input range: 1 V p-p to 2 V p-p
- Differential analog inputs with 650 MHz bandwidth ADC clock duty cycle stabilizer
- Serial port control
- User-configurable, built-in self-test (BIST) capability Energy-saving power-down modes
Product Details
The AD9265 is a 16-bit, 125 MSPS analog-to-digital converter (ADC). The AD9265 is designed to support communications applications where high performance combined with low cost, small size, and versatility is desired.
The ADC core features a multistage, differential pipelined architecture with integrated output error correction logic to provide 16-bit accuracy at 125 MSPS data rates and guarantees no missing codes over the full operating temperature range.
The ADC features a wide bandwidth differential sample-and-hold analog input amplifier supporting a variety of user-selectable input ranges. It is suitable for multiplexed systems that switch full-scale voltage levels in successive channels and for sampling single-channel inputs at frequencies well beyond the Nyquist rate. Combined with power and cost savings over previously available ADCs, the AD9265 is suitable for applications in communications, instrumentation and medical imaging.
A differential clock input controls all internal conversion cycles. A duty cycle stabilizer provides the means to compensate for variations in the ADC clock duty cycle, allowing the converters to maintain excellent performance over a wide range of input clock duty cycles. An integrated voltage reference eases design considerations.
The ADC output data format is either parallel 1.8 V CMOS or LVDS (DDR). A data output clock is provided to ensure proper latch timing with receiving logic.
Programming for setup and control is accomplished using a 3-wire SPI-compatible serial interface. Flexible power-down options allow significant power savings, when desired. An optional on-chip dither function is available to improve SFDR performance with low power analog input signals.
The AD9265 is available in a Pb-free, 48-lead LFCSP and is specified over the industrial temperature range of −40°C to +85°C.
APPLICATIONS
- Communications
- Multimode digital receivers (3G)
- GSM, EDGE, W-CDMA, LTE, CDMA2000, WiMAX, and TD-SCDMA
- Smart antenna systems
- General-purpose software radios
- Broadband data applications
- Ultrasound equipment
PRODUCT HIGHLIGHTS
- On-chip dither option for improved SFDR performance with low power analog input.
- Proprietary differential input that maintains excellent SNR performance for input frequencies up to 300 MHz.
- Operation from a single 1.8 V supply and a separate digital output driver supply accommodating 1.8 V CMOS or LVDS outputs.
- Standard serial port interface (SPI) that supports various product features and functions, such as data formatting (offset binary, twos complement, or gray coding), enabling the clock duty cycle stabilizer, DCS, power-down, test modes, and voltage reference mode.
- Pin compatibility with the AD9255, allowing a simple migration from 16 bits down to 14 bits.
Product Categories
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 (2)
Documentation & Resources
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Evaluating the AD9265 Analog-to-Digital Converter3/22/2022WIKI
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GSPS Data Converters to the Rescue for Electronics Surveillance and Warfare Systems!12/1/2014
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Designing Power Supplies for High Speed ADC2/1/2012
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The Differential-signal Advantage for Communications System Design10/4/2010
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Improve The Design Of Your Passive Wideband ADC Front-End Network3/26/2010
Software & Systems Requirements
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®
S-Parameters
XLS
AD9255/AD9265 S-Parameters
1329 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.
ADIsimRF
ADIsimRF is an easy-to-use RF signal chain calculator. Cascaded gain, noise, distortion and power consumption can be calculated, plotted and exported for signal chains with up to 50 stages. ADIsimRF also includes an extensive data base of device models for ADI’s RF and mixed signal components.
Reference Designs (1)
Product Recommendations
AD9265 Companion Parts
Recommended Clock Drivers
Recommended Driver Amplifiers
- For DC-coupled inputs: ADA4937-2, ADA4938-2.
- For differential RF/IF: ADL5561, ADL5562.
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
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.