Datasheet AD7484 (Analog Devices) - 4
| 制造商 | Analog Devices |
| 描述 | 14-Bit, 3 MSPS SAR ADC |
| 页数 / 页 | 21 / 4 — AD7484. SPECIFICATIONS. Table 1. Parameter. Min. Typ. Max. Unit. Test … |
| 修订版 | C |
| 文件格式/大小 | PDF / 602 Kb |
| 文件语言 | 英语 |
AD7484. SPECIFICATIONS. Table 1. Parameter. Min. Typ. Max. Unit. Test Conditions/Comments
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AD7484 SPECIFICATIONS
AVDD/DVDD = 5 V ± 5%, AGND = DGND = 0 V, VREF = external, fSAMPLE = 3 MSPS; al specifications TMIN to TMAX and valid for VDRIVE = 2.7 V to 5.25 V, unless otherwise noted. Operating temperature range is −40°C to +85°C.
Table 1. Parameter Min Typ Max Unit Test Conditions/Comments
DYNAMIC PERFORMANCE1, 2 Signal-to-Noise + Distortion (SINAD)3 76.5 dB fIN = 1 MHz 78 dB fIN = 1 MHz 79 dB fIN = 1 MHz, extended input 77 dB fIN = 1 MHz, internal reference Total Harmonic Distortion (THD)3 −90 dB −95 dB −92 dB Internal reference Peak Harmonic or Spurious Noise −90 dB (SFDR)3 Intermodulation Distortion (IMD)3 Second Order Terms −96 dB fIN1 = 95.053 kHz, fIN2 = 105.329 kHz Third Order Terms −94 dB Aperture Delay 10 ns Full Power Bandwidth 40 MHz @ 3 dB 3.5 MHz @ 0.1 dB DC ACCURACY Resolution 14 Bits Integral Nonlinearity3 ±0.5 ±1 LSB Differential Nonlinearity3 ±0.3 ±0.75 LSB Guaranteed no missed codes to 14 bits Offset Error3 ±6 LSB 0.036 %FSR Gain Error3 ±6 LSB 0.036 %FSR ANALOG INPUT Input Voltage −200 mV +2.7 V DC Leakage Current ±1 µA VIN from 0 V to 2.7 V ±2 µA VIN = −200 mV Input Capacitance4 35 pF REFERENCE INPUT/OUTPUT Input Voltage, VREFIN +2.5 V ± 1% for specified performance Input DC Leakage Current, VREFIN ±1 µA Input Capacitance, V 4 REFIN 25 pF Input Current, VREFIN 220 µA External reference Output Voltage, VREFOUT +2.5 V Error @ 25°C, VREFOUT ±50 mV Error TMIN to TMAX, VREFOUT ±100 mV Output Impedance, VREFOUT 1 Ω Rev. C | Page 3 of 20 Document Outline Features Functional Block Diagram General Description Revision History Specifications Timing Characteristics Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Terminology Circuit Description Converter Operation Analog Input ADC Transfer Function Power Saving Offset/Overrange Parallel Interface Reading Data from the AD7484 Writing to the AD7484 Driving the CONVST Pin Typical Connection Board Layout and Grounding Outline Dimensions Ordering Guide
AD7484 SPECIFICATIONS
AVDD/DVDD = 5 V ± 5%, AGND = DGND = 0 V, VREF = external, fSAMPLE = 3 MSPS; al specifications TMIN to TMAX and valid for VDRIVE = 2.7 V to 5.25 V, unless otherwise noted. Operating temperature range is −40°C to +85°C.
Table 1. Parameter Min Typ Max Unit Test Conditions/Comments
DYNAMIC PERFORMANCE1, 2 Signal-to-Noise + Distortion (SINAD)3 76.5 dB fIN = 1 MHz 78 dB fIN = 1 MHz 79 dB fIN = 1 MHz, extended input 77 dB fIN = 1 MHz, internal reference Total Harmonic Distortion (THD)3 −90 dB −95 dB −92 dB Internal reference Peak Harmonic or Spurious Noise −90 dB (SFDR)3 Intermodulation Distortion (IMD)3 Second Order Terms −96 dB fIN1 = 95.053 kHz, fIN2 = 105.329 kHz Third Order Terms −94 dB Aperture Delay 10 ns Full Power Bandwidth 40 MHz @ 3 dB 3.5 MHz @ 0.1 dB DC ACCURACY Resolution 14 Bits Integral Nonlinearity3 ±0.5 ±1 LSB Differential Nonlinearity3 ±0.3 ±0.75 LSB Guaranteed no missed codes to 14 bits Offset Error3 ±6 LSB 0.036 %FSR Gain Error3 ±6 LSB 0.036 %FSR ANALOG INPUT Input Voltage −200 mV +2.7 V DC Leakage Current ±1 µA VIN from 0 V to 2.7 V ±2 µA VIN = −200 mV Input Capacitance4 35 pF REFERENCE INPUT/OUTPUT Input Voltage, VREFIN +2.5 V ± 1% for specified performance Input DC Leakage Current, VREFIN ±1 µA Input Capacitance, V 4 REFIN 25 pF Input Current, VREFIN 220 µA External reference Output Voltage, VREFOUT +2.5 V Error @ 25°C, VREFOUT ±50 mV Error TMIN to TMAX, VREFOUT ±100 mV Output Impedance, VREFOUT 1 Ω Rev. C | Page 3 of 20 Document Outline Features Functional Block Diagram General Description Revision History Specifications Timing Characteristics Absolute Maximum Ratings ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Terminology Circuit Description Converter Operation Analog Input ADC Transfer Function Power Saving Offset/Overrange Parallel Interface Reading Data from the AD7484 Writing to the AD7484 Driving the CONVST Pin Typical Connection Board Layout and Grounding Outline Dimensions Ordering Guide