Datasheet AD9277 (Analog Devices) - 2
| Hersteller | Analog Devices |
| Beschreibung | Octal LNA/VGA/AAF/14-Bit ADC and CW I/Q Demodulator |
| Seiten / Seite | 48 / 2 — AD9277. TABLE OF CONTENTS. REVISION HISTORY. 7/09—Revision 0: Initial … |
| Dateiformat / Größe | PDF / 1.0 Mb |
| Dokumentensprache | Englisch |
AD9277. TABLE OF CONTENTS. REVISION HISTORY. 7/09—Revision 0: Initial Version
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AD9277 TABLE OF CONTENTS
Features .. 1 Ultrasound .. 21 Applications ... 1 Channel Overview ... 22 Product Highlights ... 1 Input Overdrive .. 25 Functional Block Diagram .. 1 CW Doppler Operation ... 25 Revision History ... 2 TGC Operation ... 29 General Description ... 3 ADC ... 33 Specifications ... 4 Clock Input Considerations .. 33 AC Specifications .. 4 Digital Outputs and Timing ... 35 Digital Specifications ... 7 Serial Port Interface (SPI) .. 39 Switching Specifications .. 8 Hardware Interface ... 40 ADC Timing Diagrams ... 9 Memory Map .. 41 Absolute Maximum Ratings .. 10 Reading the Memory Map Table .. 41 Thermal Impedance ... 10 Reserved Locations .. 41 ESD Caution .. 10 Default Values ... 41 Pin Configuration and Function Descriptions ... 11 Logic Levels ... 41 Typical Performance Characteristics ... 14 Applications Information .. 45 TGC Mode ... 14 Power and Ground Recommendations ... 45 CW Doppler Mode ... 17 Exposed Paddle Thermal Heat Slug Recommendations .. 45 Equivalent Circuits ... 19 Outline Dimensions ... 46 Theory of Operation .. 21 Ordering Guide .. 46
REVISION HISTORY 7/09—Revision 0: Initial Version
Rev. 0 | Page 2 of 48 Document Outline FEATURES APPLICATIONS PRODUCT HIGHLIGHTS FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY GENERAL DESCRIPTION SPECIFICATIONS AC SPECIFICATIONS DIGITAL SPECIFICATIONS SWITCHING SPECIFICATIONS ADC TIMING DIAGRAMS ABSOLUTE MAXIMUM RATINGS THERMAL IMPEDANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TGC MODE CW DOPPLER MODE EQUIVALENT CIRCUITS THEORY OF OPERATION ULTRASOUND CHANNEL OVERVIEW Low Noise Amplifier (LNA) Active Impedance Matching LNA Noise INPUT OVERDRIVE Input Overload Protection CW DOPPLER OPERATION Quadrature Generation I/Q Demodulator and Phase Shifter Dynamic Range and Noise Phase Compensation and Analog Beamforming CW Application Information TGC OPERATION Variable Gain Amplifier (VGA) Gain Control VGA Noise Antialiasing Filter (AAF) ADC CLOCK INPUT CONSIDERATIONS Clock Duty Cycle Considerations Clock Jitter Considerations Power Dissipation and Power-Down Mode DIGITAL OUTPUTS AND TIMING SDIO Pin SCLK Pin CSB Pin RBIAS Pin Voltage Reference SERIAL PORT INTERFACE (SPI) HARDWARE INTERFACE MEMORY MAP READING THE MEMORY MAP TABLE RESERVED LOCATIONS DEFAULT VALUES LOGIC LEVELS APPLICATIONS INFORMATION POWER AND GROUND RECOMMENDATIONS EXPOSED PADDLE THERMAL HEAT SLUG RECOMMENDATIONS OUTLINE DIMENSIONS ORDERING GUIDE
AD9277 TABLE OF CONTENTS
Features .. 1 Ultrasound .. 21 Applications ... 1 Channel Overview ... 22 Product Highlights ... 1 Input Overdrive .. 25 Functional Block Diagram .. 1 CW Doppler Operation ... 25 Revision History ... 2 TGC Operation ... 29 General Description ... 3 ADC ... 33 Specifications ... 4 Clock Input Considerations .. 33 AC Specifications .. 4 Digital Outputs and Timing ... 35 Digital Specifications ... 7 Serial Port Interface (SPI) .. 39 Switching Specifications .. 8 Hardware Interface ... 40 ADC Timing Diagrams ... 9 Memory Map .. 41 Absolute Maximum Ratings .. 10 Reading the Memory Map Table .. 41 Thermal Impedance ... 10 Reserved Locations .. 41 ESD Caution .. 10 Default Values ... 41 Pin Configuration and Function Descriptions ... 11 Logic Levels ... 41 Typical Performance Characteristics ... 14 Applications Information .. 45 TGC Mode ... 14 Power and Ground Recommendations ... 45 CW Doppler Mode ... 17 Exposed Paddle Thermal Heat Slug Recommendations .. 45 Equivalent Circuits ... 19 Outline Dimensions ... 46 Theory of Operation .. 21 Ordering Guide .. 46
REVISION HISTORY 7/09—Revision 0: Initial Version
Rev. 0 | Page 2 of 48 Document Outline FEATURES APPLICATIONS PRODUCT HIGHLIGHTS FUNCTIONAL BLOCK DIAGRAM TABLE OF CONTENTS REVISION HISTORY GENERAL DESCRIPTION SPECIFICATIONS AC SPECIFICATIONS DIGITAL SPECIFICATIONS SWITCHING SPECIFICATIONS ADC TIMING DIAGRAMS ABSOLUTE MAXIMUM RATINGS THERMAL IMPEDANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TGC MODE CW DOPPLER MODE EQUIVALENT CIRCUITS THEORY OF OPERATION ULTRASOUND CHANNEL OVERVIEW Low Noise Amplifier (LNA) Active Impedance Matching LNA Noise INPUT OVERDRIVE Input Overload Protection CW DOPPLER OPERATION Quadrature Generation I/Q Demodulator and Phase Shifter Dynamic Range and Noise Phase Compensation and Analog Beamforming CW Application Information TGC OPERATION Variable Gain Amplifier (VGA) Gain Control VGA Noise Antialiasing Filter (AAF) ADC CLOCK INPUT CONSIDERATIONS Clock Duty Cycle Considerations Clock Jitter Considerations Power Dissipation and Power-Down Mode DIGITAL OUTPUTS AND TIMING SDIO Pin SCLK Pin CSB Pin RBIAS Pin Voltage Reference SERIAL PORT INTERFACE (SPI) HARDWARE INTERFACE MEMORY MAP READING THE MEMORY MAP TABLE RESERVED LOCATIONS DEFAULT VALUES LOGIC LEVELS APPLICATIONS INFORMATION POWER AND GROUND RECOMMENDATIONS EXPOSED PADDLE THERMAL HEAT SLUG RECOMMENDATIONS OUTLINE DIMENSIONS ORDERING GUIDE