Datasheet AD7298 (Analog Devices) - 4
| Fabricante | Analog Devices |
| Descripción | 8-Channel, 1MSPS, 12-Bit SAR ADC with Temperature Sensor |
| Páginas / Página | 25 / 4 — AD7298. SPECIFICATIONS. Table 1. Parameter Min. Typ. Max. Unit. Test. … |
| Revisión | B |
| Formato / tamaño de archivo | PDF / 457 Kb |
| Idioma del documento | Inglés |
AD7298. SPECIFICATIONS. Table 1. Parameter Min. Typ. Max. Unit. Test. Conditions/Comments
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AD7298 SPECIFICATIONS
VDD = 2.8 V to 3.6 V; VDRIVE = 1.65 V to 3.6 V; fSAMPLE = 1 MSPS, fSCLK = 20 MHz, VREF = 2.5 V internal; TA = −40°C to +125°C, unless otherwise noted.
Table 1. Parameter Min Typ Max Unit Test Conditions/Comments
DYNAMIC PERFORMANCE fIN = 50 kHz sine wave Signal-to-Noise Ratio (SNR)1, 2 70 72 dB Signal-to-Noise (and Distortion) Ratio (SINAD)1 70 71 dB Total Harmonic Distortion (THD)1 −82 −77 dB Spurious-Free Dynamic Range (SFDR) −84 −77.5 dB Intermodulation Distortion (IMD) fA = 40.1 kHz, fB = 41.5 kHz Second-Order Terms −84 dB Third-Order Terms −93 dB Channel-to-Channel Isolation −100 dB fIN = 50 kHz, fNOISE = 60 kHz SAMPLE AND HOLD Aperture Delay3 12 ns Aperture Jitter3 40 ps Full Power Bandwidth 30 MHz @ 3 dB 10 MHz @ 0.1 dB DC ACCURACY Resolution 12 Bits Integral Nonlinearity (INL)1 ±0.5 ±1 LSB Differential Nonlinearity (DNL)1 ±0.5 ±0.99 LSB Guaranteed no missed codes to 12 bits Offset Error1 ±2 ±4.5 LSB Offset Error Matching1 ±2.5 ±4.5 LSB Offset Temperature Drift 4 ppm/°C Gain Error1 ±1 ±4 LSB Gain Error Matching1 ±1 ±2.5 LSB Gain Temperature Drift 0.5 ppm/°C ANALOG INPUT Input Voltage Ranges 0 VREF V DC Leakage Current ±0.01 ±1 μA Input Capacitance 32 pF When in track 8 pF When in hold mode REFERENCE INPUT/OUTPUT Reference Output Voltage4 2.4925 2.5 2.5075 V ±0.3% maximum @ 25°C Long-Term Stability 150 ppm For 1000 hours Output Voltage Hysteresis 50 ppm Reference Input Voltage Range5 1 2.5 V DC Leakage Current ±0.01 ±1 μA External reference applied to Pin VREF VREF Output Impedance 1 Ω VREF Temperature Coefficient 12 35 ppm/°C VREF Noise 60 μV rms Bandwidth = 10 MHz Rev. B | Page 3 of 24 Document Outline FEATURES GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM PRODUCT HIGHLIGHTS TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION THERMAL RESISTANCE PIN CONFIGURATION AND FUNCTION DESCRIPTION TYPICAL PERFORMANCE CHARACTERISTICS TERMINOLOGY CIRCUIT INFORMATION CONVERTER OPERATION ANALOG INPUT ADC Transfer Function TEMPERATURE SENSOR OPERATION TEMPERATURE SENSOR AVERAGING Temperature Value Format VDRIVE THE INTERNAL OR EXTERNAL REFERENCE CONTROL REGISTER MODES OF OPERATION TRADITIONAL MULTICHANNEL MODE OF OPERATION REPEAT OPERATION POWER-DOWN MODES Normal Mode Partial Power-Down Mode Full Power-Down Mode POWERING UP THE AD7298 RESET SERIAL INTERFACE TEMPERATURE SENSOR READ LAYOUT AND CONFIGURATION POWER SUPPLY BYPASSING AND GROUNDING TEMPERATURE MONITORING OUTLINE DIMENSIONS ORDERING GUIDE
AD7298 SPECIFICATIONS
VDD = 2.8 V to 3.6 V; VDRIVE = 1.65 V to 3.6 V; fSAMPLE = 1 MSPS, fSCLK = 20 MHz, VREF = 2.5 V internal; TA = −40°C to +125°C, unless otherwise noted.
Table 1. Parameter Min Typ Max Unit Test Conditions/Comments
DYNAMIC PERFORMANCE fIN = 50 kHz sine wave Signal-to-Noise Ratio (SNR)1, 2 70 72 dB Signal-to-Noise (and Distortion) Ratio (SINAD)1 70 71 dB Total Harmonic Distortion (THD)1 −82 −77 dB Spurious-Free Dynamic Range (SFDR) −84 −77.5 dB Intermodulation Distortion (IMD) fA = 40.1 kHz, fB = 41.5 kHz Second-Order Terms −84 dB Third-Order Terms −93 dB Channel-to-Channel Isolation −100 dB fIN = 50 kHz, fNOISE = 60 kHz SAMPLE AND HOLD Aperture Delay3 12 ns Aperture Jitter3 40 ps Full Power Bandwidth 30 MHz @ 3 dB 10 MHz @ 0.1 dB DC ACCURACY Resolution 12 Bits Integral Nonlinearity (INL)1 ±0.5 ±1 LSB Differential Nonlinearity (DNL)1 ±0.5 ±0.99 LSB Guaranteed no missed codes to 12 bits Offset Error1 ±2 ±4.5 LSB Offset Error Matching1 ±2.5 ±4.5 LSB Offset Temperature Drift 4 ppm/°C Gain Error1 ±1 ±4 LSB Gain Error Matching1 ±1 ±2.5 LSB Gain Temperature Drift 0.5 ppm/°C ANALOG INPUT Input Voltage Ranges 0 VREF V DC Leakage Current ±0.01 ±1 μA Input Capacitance 32 pF When in track 8 pF When in hold mode REFERENCE INPUT/OUTPUT Reference Output Voltage4 2.4925 2.5 2.5075 V ±0.3% maximum @ 25°C Long-Term Stability 150 ppm For 1000 hours Output Voltage Hysteresis 50 ppm Reference Input Voltage Range5 1 2.5 V DC Leakage Current ±0.01 ±1 μA External reference applied to Pin VREF VREF Output Impedance 1 Ω VREF Temperature Coefficient 12 35 ppm/°C VREF Noise 60 μV rms Bandwidth = 10 MHz Rev. B | Page 3 of 24 Document Outline FEATURES GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM PRODUCT HIGHLIGHTS TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION THERMAL RESISTANCE PIN CONFIGURATION AND FUNCTION DESCRIPTION TYPICAL PERFORMANCE CHARACTERISTICS TERMINOLOGY CIRCUIT INFORMATION CONVERTER OPERATION ANALOG INPUT ADC Transfer Function TEMPERATURE SENSOR OPERATION TEMPERATURE SENSOR AVERAGING Temperature Value Format VDRIVE THE INTERNAL OR EXTERNAL REFERENCE CONTROL REGISTER MODES OF OPERATION TRADITIONAL MULTICHANNEL MODE OF OPERATION REPEAT OPERATION POWER-DOWN MODES Normal Mode Partial Power-Down Mode Full Power-Down Mode POWERING UP THE AD7298 RESET SERIAL INTERFACE TEMPERATURE SENSOR READ LAYOUT AND CONFIGURATION POWER SUPPLY BYPASSING AND GROUNDING TEMPERATURE MONITORING OUTLINE DIMENSIONS ORDERING GUIDE