Datasheet AD7661 (Analog Devices) - 4
| 制造商 | Analog Devices |
| 描述 | 16-Bit, 100 kSPS PulSAR® Unipolar ADC with Ref |
| 页数 / 页 | 29 / 4 — AD7661 |
| 文件格式/大小 | PDF / 491 Kb |
| 文件语言 | 英语 |
AD7661
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AD7661 SPECIFICATIONS Table 2. –40°C to +85°C, AVDD = DVDD = 5 V, OVDD = 2.7 V to 5.25 V, unless otherwise noted Parameter Conditions Min Typ Max Unit
RESOLUTION 16 Bits ANALOG INPUT Voltage Range VIN – VINGND 0 VREF V Operating Input Voltage VIN –0.1 +3 V VINGND –0.1 +0.5 V Analog Input CMRR fIN = 10 kHz 68 dB Input Current 100 kSPS Throughput 1.1 µA Input Impedance1 THROUGHPUT SPEED Complete Cycle 10 µs Throughput Rate 0 100 kSPS DC ACCURACY Integral Linearity Error –2.5 +2.5 LSB2 No Missing Codes 16 Bits Differential Linearity Error –1.0 +1.5 LSB Transition Noise 0.7 LSB Unipolar Zero Error, T 3 MIN to TMAX ±5 LSB Unipolar Zero Error Temperature Drift3 ±0.25 ppm/°C Full-Scale Error, T 3 MIN to TMAX REF = 2.5 V ±0.08 % of FSR Full-Scale Error Temperature Drift ±0.4 ppm/°C Power Supply Sensitivity AVDD = 5 V ± 5% ±2 LSB AC ACCURACY Signal-to-Noise fIN = 20 kHz 88 89.3 dB4 Spurious Free Dynamic Range fIN = 20 kHz 96 107 dB Total Harmonic Distortion fIN = 20 kHz –107 –96 dB Signal-to-(Noise + Distortion) fIN = 20 kHz 88 89.3 dB –60 dB Input, fIN = 20 kHz 30 dB –3 dB Input Bandwidth 820 kHz SAMPLING DYNAMICS Aperture Delay 2 ns Aperture Jitter 5 ps rms Transient Response Full-Scale Step 8.75 µs REFERENCE Internal Reference Voltage VREF @ 25°C 2.48 2.5 2.52 V Internal Reference Temperature Drift –40°C to +85°C ±3 ±15 ppm/°C Output Voltage Hysteresis –40°C to +85°C 50 ppm Long Term Drift 100 ppm/1000 Hours Line Regulation AVDD = 5 V ± 5% ±15 ppm/V Turn-On Settling Time CREF = 10 µF 5 ms Temperature Pin Voltage Output @ 25°C 300 mV Temperature Sensitivity 1 mV/°C Output Resistance 4.3 kΩ External Reference Voltage Range 2.3 2.5 AVDD – 1.85 V External Reference Current Drain 100 kSPS Throughput 35 µA Rev. 0 | Page 3 of 28 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM PRODUCT HIGHLIGHTS SPECIFICATIONS TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS DEFINITIONS OF SPECIFICATIONS TYPICAL PERFORMANCE CHARACTERISTICS CIRCUIT INFORMATION CONVERTER OPERATION Transfer Functions TYPICAL CONNECTION DIAGRAM Analog Input Driver Amplifier Choice Voltage Reference Input Power Supply POWER DISSIPATION VERSUS 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 AD7661’S PERFORMANCE OUTLINE DIMENSIONS ORDERING GUIDE
AD7661 SPECIFICATIONS Table 2. –40°C to +85°C, AVDD = DVDD = 5 V, OVDD = 2.7 V to 5.25 V, unless otherwise noted Parameter Conditions Min Typ Max Unit
RESOLUTION 16 Bits ANALOG INPUT Voltage Range VIN – VINGND 0 VREF V Operating Input Voltage VIN –0.1 +3 V VINGND –0.1 +0.5 V Analog Input CMRR fIN = 10 kHz 68 dB Input Current 100 kSPS Throughput 1.1 µA Input Impedance1 THROUGHPUT SPEED Complete Cycle 10 µs Throughput Rate 0 100 kSPS DC ACCURACY Integral Linearity Error –2.5 +2.5 LSB2 No Missing Codes 16 Bits Differential Linearity Error –1.0 +1.5 LSB Transition Noise 0.7 LSB Unipolar Zero Error, T 3 MIN to TMAX ±5 LSB Unipolar Zero Error Temperature Drift3 ±0.25 ppm/°C Full-Scale Error, T 3 MIN to TMAX REF = 2.5 V ±0.08 % of FSR Full-Scale Error Temperature Drift ±0.4 ppm/°C Power Supply Sensitivity AVDD = 5 V ± 5% ±2 LSB AC ACCURACY Signal-to-Noise fIN = 20 kHz 88 89.3 dB4 Spurious Free Dynamic Range fIN = 20 kHz 96 107 dB Total Harmonic Distortion fIN = 20 kHz –107 –96 dB Signal-to-(Noise + Distortion) fIN = 20 kHz 88 89.3 dB –60 dB Input, fIN = 20 kHz 30 dB –3 dB Input Bandwidth 820 kHz SAMPLING DYNAMICS Aperture Delay 2 ns Aperture Jitter 5 ps rms Transient Response Full-Scale Step 8.75 µs REFERENCE Internal Reference Voltage VREF @ 25°C 2.48 2.5 2.52 V Internal Reference Temperature Drift –40°C to +85°C ±3 ±15 ppm/°C Output Voltage Hysteresis –40°C to +85°C 50 ppm Long Term Drift 100 ppm/1000 Hours Line Regulation AVDD = 5 V ± 5% ±15 ppm/V Turn-On Settling Time CREF = 10 µF 5 ms Temperature Pin Voltage Output @ 25°C 300 mV Temperature Sensitivity 1 mV/°C Output Resistance 4.3 kΩ External Reference Voltage Range 2.3 2.5 AVDD – 1.85 V External Reference Current Drain 100 kSPS Throughput 35 µA Rev. 0 | Page 3 of 28 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM PRODUCT HIGHLIGHTS SPECIFICATIONS TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS DEFINITIONS OF SPECIFICATIONS TYPICAL PERFORMANCE CHARACTERISTICS CIRCUIT INFORMATION CONVERTER OPERATION Transfer Functions TYPICAL CONNECTION DIAGRAM Analog Input Driver Amplifier Choice Voltage Reference Input Power Supply POWER DISSIPATION VERSUS 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 AD7661’S PERFORMANCE OUTLINE DIMENSIONS ORDERING GUIDE