Datasheet AD9225 (Analog Devices) - 8

AD9225 90 –70 80 SFDR INT 2V REF –75 70 60 –80 SNR INT 2V REF THD (dB) 50 INT 1V REF SNR AND SFDR (dBFS) –85 INT 2V REF 40 30 –90 –40 –35 –30 –25 –20 –15 –10 –5 0 10 AIN (dB) FREQUENCY (MHz)
TPC 7. SNR/SFDR vs. AIN (Input Amplitude) TPC 10. THD vs. Sample Rate, (AIN = –0.5 dB, (fIN = 12.5 MHz, Input Span = 4.0 V p-p, VCM = 2.5 V VCM = 2.5 V, Input Span = 4.0 V p-p Differential Input) Differential Input)
–65 75 20.0dB 2V INT REF 0.5dB 2V INT REF –70 70 6.0dB 2V INT REF –75 65 THD (dB) SNR (dB) –80 6.0dB 2V INT REF 60 0.5dB 2V INT REF –85 55 20.0dB 2V INT REF –90 50 1 10 1 10 FREQUENCY (MHz) FREQUENCY (MHz)
TPC 8. THD vs. Input Frequency (Input Span = TPC 11. SNR vs. Input Frequency (Input Span = 4.0 V p-p, VCM = 2.5 V Single-Ended Input) 4.0 V p-p, VCM = 2.5 V Single-Ended Input)
246447 ITSH 3299 4206 N – 1 N N + 1 BIN
TPC 9. Grounded-Input Histogram (Input Span = 40 V p-p) Rev. C –7– Document Outline FEATURES GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM PRODUCT HIGHLIGHTS SPECIFICATIONS DC SPECIFICATIONS AC SPECIFICATIONS DIGITAL SPECIFICATIONS SWITCHING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION PIN FUNCTION DESCRIPTIONS TERMINOLOGY Integral Nonlinearity (INL) Differential Nonlinearity (DNL, No Missing Codes) Zero Error Gain Error Temperature Drift Power Supply Rejection Aperture Jitter Aperture Delay Signal-to-Noise and Distortion Ratio (S/N+D, SINAD) Effective Number of Bits (ENOB) Total Harmonic Distortion (THD) Signal-to-Noise Ratio (SNR) Spurious-Free Dynamic Range (SFDR) TYPICAL PERFORMANCE CHARACTERISTICS INTRODUCTION ANALOG INPUT AND REFERENCE OVERVIEW ANALOG INPUT OPERATION REFERENCE OPERATION DRIVING THE ANALOG INPUTS SINGLE-ENDED MODE OF OPERATION DC COUPLING AND INTERFACE ISSUES Simple Op Amp Buffer Op Amp with DC Level Shifting AC COUPLING AND INTERFACE ISSUES Simple AC Interface Alternative AC Interface OP AMP SELECTION GUIDE DIFFERENTIAL MODE OF OPERATION REFERENCE CONFIGURATIONS USING THE INTERNAL REFERENCE Single-Ended Input with 0 to 2 3 VREF Range Resistor Programmable Reference USING AN EXTERNAL REFERENCE Variable Input Span with VCM = 2.5 V Single-Ended Input with 0 to 2 ¥ VREF Range DIGITAL INPUTS AND OUTPUTS Digital Outputs Out-Of-Range (OTR) Digital Output Driver Considerations (DRVDD) Clock Input and Considerations Direct IF Down Conversion Using the AD9225 GROUNDING AND DECOUPLING Analog and Digital Grounding Analog and Digital Driver Supply Decoupling OUTLINE DIMENSIONS Ordering Guide REVISION HISTORY