Datasheet AD7265 (Analog Devices) - 10

Data Sheet AD7265 TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25°C, unless otherwise noted.
–60 4096 POINT FFT INTERNAL REFERENCE –10 VDD = 5V, VDRIVE = 3V FSAMPLE = 1MSPS –70 FIN = 26kHz SINAD = 71.4dB –30 THD = –84.42dB –80 DIFFERENTIAL MODE EXTERNAL REFERENCE –50 –90 B) (d PSRR (dB) –70 –100 –110 –90 100mV p-p SINE WAVE ON AVDD NO DECOUPLING SINGLE-ENDED MODE –120 –110
006
0 200 400 600 800 1000 1200 1400 1600 1800 2000 0 50 100 150 200 250 300 350 400 450 500 SUPPLY RIPPLE FREQUENCY (kHz) FREQUENCY (kHz)
04674-003 04674- Figure 4. PSRR vs. Supply Ripple Frequency Without Supply Decoupling Figure 7. FFT
–50 1.0 V V DD = 5V DD = 5V, VDRIVE = 3V DIFFERENTIAL MODE –55 0.8 –60 0.6 –65 0.4 –70 0.2 –75 0 –80 –0.2 ISOLATION (dB) –85 DNL ERROR (LSB) –0.4 –90 –0.6 –95 –0.8 –100 –1.0 0 100 200 300 400 500 600 700 800 900 1000 0 500 1000 1500 2000 2500 3000 3500 4000 NOISE FREQUENCY (kHz) CODE
04674-004 04674-007 Figure 5. Channel-to-Channel Isolation Figure 8. Typical DNL
74 1.0 RANGE = 0 TO V V REF DD = 5V, VDRIVE = 3V DIFFERENTIAL MODE 0.8 V 0.6 DD = 5V 72 DIFFERENTIAL MODE 0.4 0.2 70 0 –0.2 SINAD (dB) VDD = 3V DIFFERENTIAL MODE INL ERROR (LSB) –0.4 68 –0.6 –0.8 66 –1.0 0 500 1000 0 500 1000 1500 2000 2500 3000 3500 4000 INPUT FREQUENCY (kHz)
04674-005
CODE
04674-008 Figure 6. SINAD vs. Analog Input Frequency for Various Supply Voltages Figure 9. Typical INL Rev. B | Page 9 of 28 Document Outline FEATURES GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM PRODUCT HIGHLIGHTS REVISION HISTORY SPECIFICATIONS TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS TERMINOLOGY THEORY OF OPERATION CIRCUIT INFORMATION CONVERTER OPERATION ANALOG INPUT STRUCTURE ANALOG INPUTS Single-Ended Mode Differential Mode Driving Differential Inputs Using an Op Amp Pair Pseudo Differential Mode ANALOG INPUT SELECTION OUTPUT CODING TRANSFER FUNCTIONS DIGITAL INPUTS VDRIVE MODES OF OPERATION NORMAL MODE PARTIAL POWER-DOWN MODE FULL POWER-DOWN MODE POWER-UP TIMES POWER vs. THROUGHPUT RATE SERIAL INTERFACE MICROPROCESSOR INTERFACING AD7265 TO ADSP-218x AD7265 to ADSP-BF53x AD7265 TO TMS320C541 AD7265 TO DSP563xx APPLICATION HINTS GROUNDING AND LAYOUT PCB DESIGN GUIDELINES FOR LFCSP EVALUATING THE AD7265 PERFORMANCE OUTLINE DIMENSIONS ORDERING GUIDE