 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| Octal LNA/VGA/AAF/ADC and Crosspoint Switch AD9272 FEATURES 8 channels of LNA, VGA, AAF, and ADC Low noise preamplifier (LNA) Input-referred noise voltage = 0.75 nV/Hz (gain = 21.3 dB) @ 5 MHz typical SPI-programmable gain = 15.6 dB/17.9 dB/21.3 dB Single-ended input; VIN maximum = 733 mV p-p/ 550 mV p-p/367 mV p-p Dual-mode active input impedance matching Bandwidth (BW) > 100 MHz Full-scale (FS) output = 4.4 V p-p differential Variable gain amplifier (VGA) Attenuator range = -42 dB to 0 dB SPI-programmable PGA gain = 21 dB/24 dB/27 dB/30 dB Linear-in-dB gain control Antialiasing filter (AAF) Programmable 2nd-order low-pass filter (LPF) from 8 MHz to 18 MHz Programmable high-pass filter (HPF) Analog-to-digital converter (ADC) 12 bits at 10 MSPS to 80 MSPS SNR = 70 dB SFDR = 75 dB Serial LVDS (ANSI-644, IEEE 1596.3 reduced range link) Data and frame clock outputs Includes an 8 x 8 differential crosspoint switch to support continuous wave (CW) Doppler Low power, 195 mW per channel at 12 bits/40 MSPS (TGC) 120 mW per channel in CW Doppler Flexible power-down modes Overload recovery in <10 ns Fast recovery from low power standby mode, <2 s 100-lead TQFP FUNCTIONAL BLOCK DIAGRAM DRVDD AVDD1 AVDD2 PDWN STBY LOSW-A LO-A LI-A LG-A LOSW-B LO-B LI-B LG-B LOSW-C LO-C LI-C LG-C LOSW-D LO-D LI-D LG-D LOSW-E LO-E LI-E LG-E LOSW-F LO-F LI-F LG-F LOSW-G LO-G LI-G LG-G LOSW-H LO-H LI-H LG-H AD9272 LNA VGA AAF 12-BIT ADC SERIAL LVDS DOUTA+ DOUTA- LNA VGA AAF 12-BIT ADC SERIAL LVDS DOUTB+ DOUTB- LNA VGA AAF 12-BIT ADC SERIAL LVDS DOUTC+ DOUTC- LNA VGA AAF 12-BIT ADC SERIAL LVDS DOUTD+ DOUTD- LNA VGA AAF 12-BIT ADC SERIAL LVDS DOUTE+ DOUTE- LNA VGA AAF 12-BIT ADC SERIAL LVDS DOUTF+ DOUTF- LNA VGA AAF 12-BIT ADC SERIAL LVDS DOUTG+ DOUTG- LNA VGA AAF 12-BIT ADC SERIAL PORT INTERFACE SERIAL LVDS DATA RATE MULTIPLIER DOUTH+ DOUTH- FCO+ FCO- DCO+ DCO- REFERENCE SWITCH ARRAY APPLICATIONS GAIN+ GAIN- CSB SCLK VREF SDIO CWD[7:0]+ AND CWD[7:0]- 07029-001 Medical imaging/ultrasound Automotive radar GENERAL DESCRIPTION The AD9272 is designed for low cost, low power, small size, and ease of use. It contains eight channels of a low noise preamplifier (LNA) with a variable gain amplifier (VGA); an antialiasing filter (AAF); and a 12-bit, 10 MSPS to 80 MSPS analog-todigital converter (ADC). Each channel features a variable gain range of 42 dB, a fully differential signal path, an active input preamplifier termination, a maximum gain of up to 52 dB, and an ADC with a conversion rate of up to 80 MSPS. The channel is optimized for dynamic performance and low power in applications where a small package size is critical. Figure 1. The LNA has a single-ended-to-differential gain that is selectable through the SPI. The LNA input-referred noise voltage is typically 0.75 nV/Hz at a gain of 21.3 dB, and the combined input-referred noise voltage of the entire channel is 0.85 nV/Hz at maximum gain. Assuming a 15 MHz noise bandwidth (NBW) and a 21.3 dB LNA gain, the input SNR is about 92 dB. In CW Doppler mode, the LNA output drives a transconductance amp that is switched through an 8 x 8 differential crosspoint switch. The switch is programmable through the SPI. For more information about the AD9272, contact Analog Devices, Inc., at highspeed.converters@analog.com. Rev. Sp0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 (c)2008 Analog Devices, Inc. All rights reserved. RBIAS CLK+ CLK- AD9272 NOTES (c)2008 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D07029F-0-10/08(Sp0) Rev. Sp0 | Page 2 of 2 |
Price & Availability of AD9272
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |