Datasheet AD9277 (Analog Devices) - 9

AD9277 ADC TIMING DIAGRAMS N – 1 AIN N tEH tEL CLK– CLK+ tCPD DCO– DCO+ tFCO tFRAME FCO– FCO+ tPD tDATA DOUTx– MSB D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 MSB D12 N – 8 N – 8 N – 8 N – 8 N – 8 N – 8 N – 8 N – 8 N – 8 N – 8 N – 8 N – 8 N – 8 N – 8 N – 7 N – 7
0201-
DOUTx+
18 08 Figure 2. 14-Bit Data Serial Stream (Default)
N – 1 AIN N tEH tEL CLK– CLK+ tCPD DCO– DCO+ tFCO tFRAME FCO– FCO+ tPD tDATA DOUTx– LSB D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 LSB D0 N – 8 N – 8 N – 8 N – 8 N – 8 N – 8 N – 8 N – 8 N – 8 N – 8 N – 8 N – 8 N – 8 N – 8 N – 7 N – 7
0301-
DOUTx+
18 08 Figure 3. 14-Bit Data Serial Stream, LSB First Rev. 0 | Page 9 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