AD9273 Octal LNA/VGA/AAF/ADC and Crosspoint Switch

The AD9273 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 50 MSPS analog-to-digital 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 50 MSPS. The channel is optimized for 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. The LNA input-referred noise voltage is typically 1.26 nV/√Hz at a gain of 21.3 dB, and the combined input-referred noise voltage of the entire channel is 1.42 nV/√Hz at typical gain. Assuming a 15 MHz noise bandwidth (NBW) and a 21.3 dB LNA gain, the input SNR is about 91 dB. In CW Doppler mode, the LNA output drives a transconductance amp that is switched through an 8 × 8 differential crosspoint switch. The switch is programmable through the SPI.

Applications
  • Medical imaging/ultrasound
  • Automotive radar
Features and Benefits
  • 8 channels of LNA, VGA, AAF, and ADC
  • Low noise preamplifier (LNA) - See data sheet for additional information
  • Variable gain amplifier (VGA) - See data sheet for additional information
  • Antialiasing filter (AAF) - See data sheet for additional information
  • Analog-to-digital converter (ADC) - See data sheet for additional information
  • Includes an 8 × 8 differential crosspoint switch to support continuous wave (CW) Doppler
  • Low power, 109 mW per channel at 12 bits/40 MSPS (TGC)
  • 70 mW per channel in CW Doppler
  • Flexible power-down modes
  • Overload recovery in <10 ns
  • See data sheet for additional features
Application Specific
AD9273 IBIS Models
Software & Systems Requirements
Data Sheets
Documentnote
AD9273: Octal LNA/VGA/AAF/ADC and Crosspoint Switch Data Sheet (Rev. B)PDF 59 kB
Application Notes
Documentnote
AN-878: High Speed ADC SPI Control Software (Rev. A)PDF 585 kB
AN-905: Visual Analog Converter Evaluation Tool Version 1.0 User Manual (Rev. 0)PDF 2124 kB
AN-835: Understanding High Speed ADC Testing and Evaluation (Rev. B)PDF 985 kB
AN-935: Designing an ADC Transformer-Coupled Front End (Rev. 0)PDF 363 kB
AN-586: LVDS Outputs for High Speed A/D Converters (Rev. 0)PDF 207 kB
AN-1142: Techniques for High Speed ADC PCB Layout (Rev. 0)PDF 392 kB
AN-737: How ADIsimADC Models an ADC (Rev. B)PDF 373 kB
AN-877: Interfacing to High Speed ADCs via SPI (Rev. A)PDF 1594 kB
AN-812: MicroController-Based Serial Port Interface (SPI) Boot Circuit (Rev. 0)
Software Download (zip, 21,702,560 bytes)		PDF 441 kB
Order Information
Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
AD9273BBCZ-25 Production144 ball CSPBGA (10x10x1.4mm)OTH 184-40 to 85C50.5943Y
AD9273BBCZ-40 Production144 ball CSPBGA (10x10x1.4mm)OTH 18452.9445Y
AD9273BBCZ-50 Production144 ball CSPBGA (10x10x1.4mm)OTH 184-40 to 85C55.2947Y
AD9273BSVZ-25 Production100 ld TQFP w/ 9.5mm exposed padOTH 90-40 to 85C50.5943Y
AD9273BSVZ-40 Production100 ld TQFP w/ 9.5mm exposed padOTH 90-40 to 85C52.9445Y
AD9273BSVZ-50 Production100 ld TQFP w/ 9.5mm exposed padOTH 90-40 to 85C55.2947Y
AD9273BSVZRL-25 Production100 ld TQFP w/ 9.5mm exposed padREEL 1000-40 to 85C043Y
AD9273BSVZRL-40 Production100 ld TQFP w/ 9.5mm exposed padREEL 1000-40 to 85C045Y
AD9273BSVZRL-50 Production100 ld TQFP w/ 9.5mm exposed padREEL 1000-40 to 85C047Y
Reference Materials
AD9273：8通道LNA/VGA/AAF/ADC与交叉点开关 (Rev. B) ad9273
AD9273: Octal LNA/VGA/AAF/ADC and Crosspoint Switch Data Sheet (Rev. B) ad9273
AD9273BSV (All Speeds) ad9273
UG-001：评估板用户指南 ad9272
AN-878: High Speed ADC SPI Control Software (Rev. A) ad6655
AN-905: Visual Analog Converter Evaluation Tool Version 1.0 User Manual (Rev. 0) ad9220
AN-835: Understanding High Speed ADC Testing and Evaluation (Rev. B) ad9220
AN-935: Designing an ADC Transformer-Coupled Front End (Rev. 0) ad9220
AN-586: LVDS Outputs for High Speed A/D Converters (Rev. 0) ad6642
AN-835: 高速ADC测试和评估 (Rev. 0) ad9510
AN-1142: 高速ADC PCB布局布线技巧 (Rev. 0) ad6655
AN-1142: Techniques for High Speed ADC PCB Layout (Rev. 0) ad6655
AN-878: 高速ADC SPI控制软件[中文版] (Rev. A) ad6655
AN-737: 如何用ADIsimADC完成ADC建模 (Rev. B) ad6642
AN-737: How ADIsimADC Models an ADC (Rev. B) ad9220
AN-877: 通过SPI与高速ADC接口[中文版] (Rev. A) ad9271
AN-877: Interfacing to High Speed ADCs via SPI (Rev. A) ad7091r
AN-905: VisualAnalog™转换器评估工具1.0版用户手册 (Rev. 0) ad6655
AN-935: ADC变压器耦合前端设计[中文版] (Rev. 0) ad6655
AN-586: 高速模数转换器的LVDS数据输出[中文版] (Rev. 0) ad6642
AN-812: 基于微控制器的串行端口接口(SPI®)启动电路 (Rev. 0) adg3304
AN-812: MicroController-Based Serial Port Interface (SPI) Boot Circuit (Rev. 0) ad6655
Software Download (zip, 21,702,560 bytes) ad6655
MS-2210：高速ADC的电源设计 ad9861
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