Datasheet AD7660 (Analog Devices) - 9

AD7660–Typical Performance Characteristics 3 30 8000 7219 7051 7000 2 25 6000 1 20 5000 0 15 4000 COUNTS INL – LSB 3000 –1 10 NUMBER OF UNITS 2000 1213 –2 5 879 1000 0 0 13 9 0 0 –3 0 0 0 16384 32768 49152 65536 0 0.6 1.2 1.8 2.4 3.0 8008 800A 800C 800E 8010 8009 800B 800D 800F 8011 CODE POSITIVE INL – LSB CODE – Hex
TPC 1. Integral Nonlinearity TPC 2. Typical Positive INL TPC 3. Histogram of 16,384 vs. Code Distribution (350 Units) Conversions of a DC Input at the Code Transition
1.75 35 10000 1.50 9026 30 1.25 8000 1.00 25 0.75 20 6000 0.50 0.25 15 DNL – LSB COUNTS 0.00 4000 3489 3520 –0.25 NUMBER OF UNITS 10 –0.50 2000 5 –0.75 0 0 161 188 0 0 –1.00 0 0 0 16384 32768 49152 65536 –3.0 –2.4 –1.8 –1.2 –0.6 0 8009 800B 800D 800F 8011 CODE NEGATIVE INL – LSB 800A 800C 800E 8010 CODE – Hex
TPC 4. Differential Nonlinearity TPC 5. Typical Negative INL TPC 6. Histogram of 16,384 vs. Code Distribution (350 Units) Conversions of a DC Input at the Code Center
0 –60 120 –60 4096 POINT FFT –20 fS = 100kHz –70 –70 110 –40 fIN = 45kHz SFDR SNR = 90.14dB –80 –80 –60 SINAD = 89.94dB 100 THD = –101.37dB –90 –80 SFDR = 110dB –90 90 –100 –100 –100 THD SECOND HARMONIC SFDR – dB –110 –120 , HARMONICS – dB 80 , HARMONICS – dB THD –110 SECOND HARMONIC THD –140 THD –120 AMPLITUDE – dB of Full Scale 70 –120 –160 THIRD HARMONIC –130 THIRD HARMONIC –180 –130 60 –140 0 10 20 30 40 50 1 10 100 1000 –90 –80 –70 –60 –50 –40 –30 –20 –10 0 FREQUENCY – kHz FREQUENCY – kHz INPUT LEVEL – dB
TPC 7. FFT Plot TPC 8. THD, Harmonics, and SFDR TPC 9. THD, Harmonics vs. vs. Frequency Input Level –8– REV. E Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM PRODUCT HIGHLIGHTS SPECIFICATIONS TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDERING GUIDE PIN FUNCTION DESCRIPTIONS DEFINITION OF SPECIFICATIONS Integral Nonlinearity Error (INL) Differential Nonlinearity Error (DNL) Full-Scale Error Unipolar 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 Overvoltage Recovery Typical Performance Characteristics CIRCUIT INFORMATION CONVERTER OPERATION Transfer Functions TYPICAL CONNECTION DIAGRAM Analog Input Driver Amplifier Choice Voltage Reference Input Power Supply POWER DISSIPATION VS. THROUGHPUT 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 (ADSP-219x) APPLICATION HINTS Bipolar and Wider Input Ranges Layout Evaluating the AD7660 Performance OUTLINE DIMENSIONS Revision History