Datasheet AD9221, AD9223, AD9220 (Analog Devices) - 6

AD9221/AD9223/AD9220 AD9221–Typical Performance Characteristics (AVDD = 5 V, DVDD = 5 V, fSAMPLE = 1.5 MSPS, TA = 25 C) 1.0 1.0 8,180,388 0.8 0.8 0.6 0.6 0.4 0.4 0.2 0.2 0.0 0.0 HITS –0.2 –0.2 INL – LSBs DNL – LSBs –0.4 –0.4 –0.6 –0.6 121,764 85,895 –0.8 –0.8 –1.0 –1.0 N–1 N N+1 0 4095 0 4095 CODE CODE CODE
TPC 1. Typical DNL TPC 2. Typical INL TPC 3. “Grounded-Input” Histogram (Input Span = 2 V p-p)
80 –50 80 –55 75 75 –0.5dB –0.5dB –60 –20.0dB 70 70 –65 –6.0dB 65 –70 65 –6.0dB –6.0dB 60 –75 60 –80 THD – dB SINAD – dB 55 SINAD – dB 55 –20.0dB –20.0dB –85 –0.5dB 50 50 –90 45 –95 45 40 –100 40 0.1 1.0 0.1 1.0 0.1 1.0 FREQUENCY – MHz FREQUENCY – MHz FREQUENCY – MHz
TPC 4. SINAD vs. Input Frequency TPC 5. THD vs. Input Frequency TPC 6. SINAD vs. Input Frequency (Input Span = 2.0 V p-p, VCM = 2.5 V) (Input Span = 2.0 V p-p, VCM = 2.5 V) (Input Span = 5.0 V p-p, VCM = 2.5 V)
–50 –60 100 –55 –65 90 –20.0dB 80 –60 –70 70 –65 –75 SFDR 60 –70 –80 –0.5dB 5V p-p 50 THD– dB THD – dB –75 –85 SNR –6.0dB 2V p-p 40 SNR/SFDR – dB –80 –90 30 –85 –95 20 –90 –100 10 0.1 1.0 0.2 0.3 0.4 0.6 0.8 1 2 3 –60 –50 –40 –30 –20 –10 0 FREQUENCY – MHz SAMPLE RATE – MSPS AIN – dBFS
TPC 7. THD vs. Input Frequency TPC 8. THD vs. Sample Rate TPC 9. SNR/SFDR vs. AIN (Input (Input Span = 5.0 V p-p, V (A Amplitude) (f CM = 2.5 V) IN = –0.5 dB, fIN = 500 kHz, IN = 500 kHz, Input VCM = 2.5 V) Span = 2 V p-p, VCM = 2.5 V) –6– REV. E Document Outline FEATURES GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM PRODUCT HIGHLIGHTS SPECIFICATIONS DC SPECIFICATIONS AC SPECIFICATIONS DIGITAL SPECIFICATIONS SWITCHING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL CHARACTERISTICS ORDERING GUIDE PIN CONFIGURATION PIN FUNCTION DESCRIPTIONS DEFINITIONS OF SPECIFICATIONS 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 (S/N+D, SINAD) Ratio 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 Introduction 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 VREF Range Single-Ended or Differential Input, VCM = 2.5 V VINA Resistor Programmable Reference USING AN EXTERNAL REFERENCE Variable Input Span with VCM = 2.5 V Single-Ended Input with 0 to 2 VREF Range Low Cost/Power Reference DIGITAL INPUTS AND OUTPUTS Digital Outputs Out Of Range (OTR) Digital Output Driver Considerations (DVDD) Clock Input and Considerations GROUNDING AND DECOUPLING Analog and Digital Grounding Analog and Digital Supply Decoupling APPLICATIONS Direct IF Down Conversion Using the AD9220 Multichannel Data Acquisition with Autocalibration OUTLINE DIMENSIONS Revision History