AD9261
NOT RECOMMENDED FOR NEW DESIGNS16-Bit, 10 MHz Bandwidth, 30 MSPS to 160 MSPS Continuous Time Sigma-Delta ADC
- Part Models
- 2
- 1ku List Price
- Starting From $29.96
Part Details
- SNR: 83 dB (85 dBFS) to 10 MHz input
- SFDR: 87 dBc to 10 MHz input
- Noise figure: 15 dB
- Input impedance: 1 kΩ
- Power: 340 mW
- 1.8 V analog supply operation
- 1.8 V to 3.3 V output supply
- Selectable bandwidth 2.5 MHz/5 MHz/10 MHz
- Output data rate: 30 MSPS to 160 MSPS
- Integrated decimation filters
- Integrated sample rate converter
- On-chip PLL clock multiplier
- On-chip voltage reference
- Offset binary, Gray code, or twos complement data format
- Serial control interface (SPI)
The AD9261 is a 16-bit analog-to-digital converter (ADC) based on a continuous time sigma-delta (Σ-Δ) architecture that achieves 86 dB of dynamic range over a 10 MHz input bandwidth. The integrated features and characteristics unique to the continuous time Σ-Δ architecture significantly simplify its use and minimize the need for external components.
The AD9261 has a resistive input impedance that significantly relaxes the requirements of the driver amplifier. In addition, a 32× oversampled 5th-order continuous time loop filter significantly attenuates out of band signals and aliases, reducing the need for external filters at the input.
An external clock input or the integrated integer-N PLL provides the 640 MHz internal clock needed for the oversampled continuous time Σ-Δ modulator. On-chip decimation filters and sample rate converters reduce the modulator data rate from 640 MSPS to a user-defined output data rate between 30 MSPS to 160 MSPS, enabling a more efficient and direct interface.
The digital output data is presented in offset binary, Gray code, or twos complement format. A data clock output (DCO) is provided to ensure proper timing with the receiving logic.
The AD9261 operates on a 1.8 V analog supply and a 1.8 V to 3.3 V digital supply, consuming 375 mW. The AD9261 is available in a 48-lead LFCSP and is specified over the industrial temperature range (−40°C to +85°C).
Product Highlights
- Continuous time Σ-Δ architecture efficiently achieves high dynamic range and wide bandwidth.
- Passive input structure reduces or eliminates the requirements 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.
- An integrated decimation filter, sample rate converter, PLL clock multiplier, and voltage reference provide ease of use.
- Operates from a single 1.8 V analog power supply and 1.8 V to 3.3 V output supply.
- A standard serial port interface (SPI) supports various product features and functions.
Applications
- Data Acquisition
- Automated Test Equipment
- Instrumentation
- Medical Imaging
Documentation
Data Sheet 1
Application Note 9
Technical Articles 2
Evaluation Design File 1
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 Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| AD9261BCPZ-10 | 48-Lead LFCSP (7mm x 7mm x 0.85mm w/ EP) | ||
| AD9261BCPZRL7-10 | 48-Lead LFCSP (7mm x 7mm x 0.85mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Jun 9, 2021 - 20_0126 Conversion of Select Sizes LFCSP Products from Punched to Sawn and Transfer of Assembly Site to ASE Korea |
||
| AD9261BCPZ-10 | PRODUCTION | |
| AD9261BCPZRL7-10 | PRODUCTION | |
|
Sep 13, 2017 - 16_0077 CANCELLED: Conversion of Select 4x4, 5x5, 6x6 and 7x7mm LFCSP Package Outlines from Punch to Sawn and Transfer of Assembly Site to ASE Korea. |
||
| AD9261BCPZ-10 | PRODUCTION | |
| AD9261BCPZRL7-10 | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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| Parts | Product Life Cycle | Description |
|---|---|---|
| Clock Distribution Devices 3 | ||
| AD9513 | RECOMMENDED FOR NEW DESIGNS | 800 MHz Clock Distribution IC, Dividers, Delay Adjust, Three Outputs |
| AD9514 | RECOMMENDED FOR NEW DESIGNS | 1.6 GHz Clock Distribution IC, Dividers, Delay Adjust, Three Outputs |
| AD9515 | RECOMMENDED FOR NEW DESIGNS | 1.6 GHz Clock Distribution IC, Dividers, Delay Adjust, Two Outputs |
| Clock Generation Devices 3 | ||
| AD9510 | RECOMMENDED FOR NEW DESIGNS | 1.2 GHz Clock Distribution IC, PLL Core, Dividers, Delay Adjust, Eight Outputs |
| AD9511 | RECOMMENDED FOR NEW DESIGNS | 1.2 GHz Clock Distribution IC, PLL Core, Dividers, Delay Adjust, Five Outputs |
| AD9512 | RECOMMENDED FOR NEW DESIGNS | 1.2 GHz Clock Distribution IC, Two 1.6 GHz Inputs, Dividers, Delay Adjust, Five Outputs |
| Series Voltage References 1 | ||
| ADR130 | PRODUCTION | Precision Series Sub-Band Gap Voltage Reference |
| Single-Ended to Differential Amplifiers 2 | ||
| ADA4937-1 | RECOMMENDED FOR NEW DESIGNS | Ultralow Distortion Differential ADC Driver (Single) |
| ADA4932-1 | RECOMMENDED FOR NEW DESIGNS | Low Power Differential ADC Driver |
Evaluation Kits
AD9261 Evaluation Board