Datasheet AD7676 (Analog Devices) - 9

AD7676–Typical Performance Characteristics 1.00 16000 14640 0.75 14000 0.50 12000 0.25 10000 0 8000 INL – LSB COUNTS –0.25 6000 –0.50 4000 –0.75 2000 880 863 0 0 0 0 0 0 0 0 –1.00 0000 0 16384 32768 49152 65536 7FFA 7FFB 7FFC 7FFD 7FFE 7FFF 8000 8001 8002 8003 8004 CODE CODE IN HEXA
TPC 1. Integral Nonlinearity vs. Code TPC 4. Histogram of 16,384 Conversions of a DC Input at the Code Center
9000 20 8271 8094 8000 7000 16 6000 12 5000 COUNTS 4000 8 3000 NUMBER OF UNITS 2000 4 1000 0 0 0 8 11 0 0 0 0000 0 7FFB 7FFC 7FFD 7FFE 7FFF 8000 8001 8002 8003 8004 –1.0 –0.9 –0.8 –0.7 –0.6 –0.5 –0.4 –0.3 –0.2 –0.1 0.0 CODE IN HEXA NEGATIVE INL – LSB
TPC 2. Histogram of 16,384 Conversions of a DC Input at TPC 5. Typical Negative INL Distribution (199 Units) the Code Transition
20 0 fS = 500kSPS –20 fIN = 45.01kHz SNR = 94dB 16 –40 THD = –110dB SFDR = 110dB SINAD = 93.9dB –60 12 –80 –100 8 –120 NUMBER OF UNITS AMPLITUDE – dB of Full Scale –140 4 –160 0 –180 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 0 50 100 150 200 250 POSITIVE INL – LSB FREQUENCY – kHz
TPC 3. Typical Positive INL Distribution (199 Units) TPC 6. FFT Plot –8– REV. B Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM PRODUCT HIGHLIGHTS SPECIFICATIONS RESOLUTION ANALOG INPUT THROUGHPUT SPEED DC ACCURACY AC ACCURACY SAMPLING DYNAMICS REFERENCE DIGITAL INPUTS DIGITAL OUTPUTS POWER SUPPLIES TEMPERATURE RANGE TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ORDERING GUIDE PIN FUNCTION DESCRIPTIONS PIN FUNCTION DESCRIPTIONS (continued) 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 AD7676 Performance OUTLINE DIMENSIONS Revision History