Datasheet AD7675 (Analog Devices) - 10

AD7675 100 16.0 50 OVDD = 2.7V @ 85 C 95 15.5 40 OVDD = 2.7V @ 25 C 90 15.0 SNR 30 Y – ns 85 14.5 OVDD = 5.0V @ 85 C SINAD ENOB – Bits 20 t 12 DELA 80 14.0 OVDD = 5.0V @ 25 C SNR AND S/[N+D] – dB ENOB 10 75 13.5 70 13.0 0 1 10 100 1000 0 50 100 150 200 FREQUENCY – kHz CL – pF
TPC 7. SNR, S/(N+D), and ENOB vs. Frequency TPC 10. Typical Delay vs. Load Capacitance CL
96 100k SNR 10k SINAD A 94 1k AVDD 100 FULL SCALE) – dB O 92 10 DVDD T ING CURRENTS – T 1 OVDD 90 0.1 OPERA SNR (REFERRED 0.01 88 0.001 –60 –50 –40 –30 –20 –10 0 10 100 1k 10k 100k INPUT LEVEL – dB SAMPLING RATE – SPS
TPC 8. SNR and S/(N+D) vs. Input Level TPC 11. Operating Currents vs. Sample Rate
96 –104 250 SNR DVDD 200 93 –106 150 ING CURRENTS – nA 90 –108 T SNR – dB THD – dB 100 WN OPERA 87 –110 THD 50 AVDD WER-DO OVDD PO 84 –112 0 –55 –35 –15 0 25 45 65 85 105 125 –55 –35 –15 5 25 45 65 85 105 TEMPERATURE – C TEMPERATURE – C
TPC 9. SNR, THD vs. Temperature TPC 12. Power-Down Operating Currents vs. Temperature REV. A –9– Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAM PulSAR Selection GENERAL DESCRIPTION PRODUCT HIGHLIGHTS SPECIFICATIONS Table I. Serial Clock Timings in Master Read after Convert ABSOLUTE MAXIMUM RATINGS ORDERING GUIDE PIN FUNCTION DESCRIPTIONS PIN CONFIGURATION DEFINITION OF SPECIFICATIONS INTEGRAL NONLINEARITY ERROR (INL) DIFFERENTIAL NONLINEARITY ERROR (DNL) +FULL-SCALE ERROR –FULL-SCALE ERROR BIPOLAR ZERO ERROR SPURIOUS FREE DYNAMIC RANGE (SFDR) EFFECTIVE NUMBER OF BITS (ENOB) TOTAL HARMONIC DISTORTION (THD) SIGNAL-TO-NOISE RATIO (SNR) SIGNAL-TO-(NOISE + DISTORTION) RATIO (S/[N+D]) APERTURE DELAY TRANSIENT RESPONSE Typical Performance Characteristics CIRCUIT INFORMATION CONVERTER OPERATION Transfer Functions TYPICAL CONNECTION DIAGRAM Analog Inputs Single to Differential Driver Driver Amplifier Choice Voltage Reference Input Power Supply POWER DISSIPATION CONVERSION CONTROL DIGITAL INTERFACE PARALLEL INTERFACE SERIAL INTERFACE MASTER SERIAL INTERFACE Internal Clock SLAVE SERIAL INTERFACE External Clock External Discontinuous Clock Data Read after Conversion External Clock Data Read During Conversion MICROPROCESSOR INTERFACING SPI Interface (MC68HC11) ADSP-21065L in Master Serial Interface APPLICATION HINTS Layout Evaluating the AD7675 Performance OUTLINE DIMENSIONS Revision History