-
AD9279: Octal LNA/VGA/AAF/ADC and CW I/Q Demodulator (Rev. 0)11/1/2010PDF964 kB
Overview
Features and Benefits
8 CHANNELS OF LNA, VGA, AAF, ADC, AND I/Q DEMODULATOR
- Lowpower : 141 mW per channel, TGC mode, 40 MSPS;
60 mW per channel, CW mode - 10 mm × 10 mm, 144-ball CSP-BGA
- TGC channel input-referred noise: 0.8 nV/√Hz, max gain
- Flexible power-down modes
- Fast recovery from low power standby mode: <2us
- Overload recovery: <10 ns
- Input-referred noise: 0.75 nV/√Hz , gain = 21.3 dB
- Programmable gain: 15.6 dB/17.9 dB/21.3 dB
- 0.1 dB compression: 1000 mV p-p/750 mV p-p/450 mV p-p
- Dual-mode active input impedance matching
- Bandwidth (BW) > 100 MHz
VARIABLE GAIN AMPLIFIER (VGA)
- Attenuator range: −45 dB to 0 dB
- Postamp gain (PGA): 21 dB/24 dB/27 dB/30 dB
- Linear-in-dB gain control
- Programmable second-order LPF from 8 MHz to 18 MHz
- Programmable HPF
- SNR: 70 dB, 12 bits up to 80 MSPS
- Serial LVDS (ANSI-644, Low power/reduced signal)
- Individual programmable phase rotation
- Output dynamic range per channel: >160 dBc/√Hz
- Output-referred SNR: 155 dBc/√Hz, 1kHz offset, -3dBFS
Product Details
The AD9279 is designed for low cost, low power, small size, and ease of use for medical ultrasound and automotive radar. It contains eight channels of a variable gain amplifier (VGA) with a low noise preamplifier (LNA), an antialiasing filter (AAF), an analog-to-digital converter (ADC), and an I/Q demodulator with programmable phase rotation.
Each channel features a variable gain range of 45 dB, a fully differential signal path, an active input preamplifier termination, and a maximum gain of up to 52 dB. The channel is optimized for high dynamic performance and low power in applications where a small package size is critical.
The LNA has a single-ended-to-differential gain that is selectable through the SPI. Assuming a 15 MHz noise bandwidth (NBW) and a 21.3 dB LNA gain, the LNA input SNR is roughly 94 dB. In CW Doppler mode, each LNA output drives an I/Q demod-ulator that has independently programmable phase rotation with 16 phase settings.
Power-down of individual channels is supported to increase battery life for portable applications. Standby mode allows quick power-up for power cycling. In CW Doppler operation, the VGA, AAF, and ADC are powered down. The ADC contains several features designed to maximize flexibility and minimize system cost, such as a programmable clock, data alignment, and programmable digital test pattern generation. The digital test patterns include built-in fixed patterns, built-in pseudo random patterns, and custom user-defined test patterns entered via the serial port interface.
Product Categories
Markets and Technologies
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 (2)
Documentation & Resources
Software & Systems Requirements
Tools & Simulations
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
AD9279 Companion Parts
Recommended Clock Drivers
- For low jitter, low power, clock fanout buffers: ADCLK846, ADCLK946.
- For low jitter performance: AD9510, AD9511, AD9512, AD9513, AD9514, AD9515.
Recommended A/D Converter
- For sampling the I and Q signals in analog beamforming applications: AD7982.
Recommended Driver Amplifiers
- For I-to-V conversion and ADC driver in CW signal path: ADA4896-2, ADA4897-2.
Recommended Gain Control of VGA
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.
Support & Discussions
AD9279 Discussions
Sample & Buy
Ordering FAQs
See our Ordering FAQs for answers to questions about online orders, payment options and more.
Buy Now Pricing
(**) Displayed Buy Now Price and Price Range is based on small quantity orders.
List Pricing
(*)The 1Ku list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
Sampling
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.
Evaluation Boards
Pricing displayed is based on 1-piece.
Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
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.