Datasheet AD7475, AD7495 (Analog Devices) - 5
| 制造商 | Analog Devices |
| 描述 | 1 MSPS, 12-Bit A/D Converter in MSOP-8 or SOIC-8 |
| 页数 / 页 | 24 / 5 — Data Sheet. AD7475/AD7495. AD7495. SPECIFICATIONS. Table 2. Parameter. A … |
| 修订版 | D |
| 文件格式/大小 | PDF / 436 Kb |
| 文件语言 | 英语 |
Data Sheet. AD7475/AD7495. AD7495. SPECIFICATIONS. Table 2. Parameter. A Version1. B Version. Unit. Test Conditions/Comments
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Data Sheet AD7475/AD7495 AD7495 SPECIFICATIONS
VDD = 2.7 V to 5.25 V, VDRIVE = 2.7 V to 5.25 V, fSCLK = 20 MHz, TA = TMIN to TMAX, unless otherwise noted.
Table 2. Parameter A Version1 B Version
1
Unit Test Conditions/Comments
DYNAMIC PERFORMANCE Signal-to-Noise and Distortion (SINAD) 68 68 dB min fIN = 300 kHz sine wave, fSAMPLE = 1 MSPS Total Harmonic Distortion (THD) −75 −75 dB max fIN = 300 kHz sine wave, fSAMPLE = 1 MSPS Peak Harmonic or Spurious Noise −76 −76 dB max fIN = 300 kHz sine wave, fSAMPLE = 1 MSPS (SFDR) Intermodulation Distortion (IMD) Second-Order Terms −78 −78 dB typ Third-Order Terms −78 −78 dB typ Aperture Delay 10 10 ns typ Aperture Jitter 50 50 ps typ Full Power Bandwidth 8.3 8.3 MHz typ @ 3 dB Full Power Bandwidth 1.3 1.3 MHz typ @ 0.1 dB DC ACCURACY Resolution 12 12 Bits Integral Nonlinearity ±1.5 ±1 LSB max @ 5 V (typ @ 3 V) ±0.5 ±0.5 LSB typ @ 25°C Differential Nonlinearity +1.5/−0.9 +1.5/−0.9 LSB max @ 5 V guaranteed no missed codes to 12 bits (typ @ 3 V) ±0.6 ±0.6 LSB typ @ 25°C Offset Error ±8 ±8 LSB max Typically ±2.5 LSB Gain Error ±7 ±7 LSB max Typically ±2.5 LSB ANALOG INPUT Input Voltage Ranges 0 to 2.5 0 to 2.5 V DC Leakage Current ±1 ±1 µA max Input Capacitance 20 20 pF typ REFERENCE OUTPUT REF OUT Output Voltage 2.4625/2.5375 2.4625/2.5375 V min/max REF OUT Impedance 10 10 Ω typ REF OUT Temperature Coefficient 50 50 ppm/°C typ LOGIC INPUTS Input High Voltage, VINH VDRIVE − 1 VDRIVE − 1 V min Input Low Voltage, VINL 0.4 0.4 V max Input Current, IIN ±1 ±1 µA max Typically 10 nA, VIN = 0 V or VDRIVE Input Capacitance, C 2 IN 10 10 pF max LOGIC OUTPUTS Output High Voltage, VOH VDRIVE − 0.2 V min ISOURCE = 200 µA; VDD = 2.7 V to 5.25 V Output Low Voltage, VOL 0.4 0.4 V max ISINK = 200 µA Floating-State Leakage Current ±10 ±10 µA max Floating-State Output Capacitance2 10 10 pF max Output Coding Straight (Natural) Binary CONVERSION RATE Conversion Time 800 800 ns max 16 SCLK cycles with SCLK @ 20 MHz Track-and-Hold Acquisition Time 300 300 ns max Sine wave input 325 325 ns max Full-scale step input Throughput Rate 1 1 MSPS max See the Serial Interface section Rev. C | Page 5 of 24 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM PRODUCT HIGHLIGHTS REVISION HISTORY AD7475 SPECIFICATIONS AD7495 SPECIFICATIONS TIMING EXAMPLE 1 TIMING EXAMPLE 2 ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TERMINOLOGY TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION CONVERTER OPERATION ADC TRANSFER FUNCTION TYPICAL CONNECTION DIAGRAM Analog Input Digital Inputs VDRIVE Reference Section OPERATING MODES NORMAL MODE PARTIAL POWER-DOWN MODE Power-Up Time FULL POWER-DOWN MODE POWER VS. THROUGHPUT RATE SERIAL INTERFACE MICROPROCESSOR INTERFACING AD7475/AD7495 TO TMS320C5x/C54x AD7475/AD7495 TO ADSP-21xx AD7475/AD7495 TO DSP56xxx AD7475/AD7495 TO MC68HC16 OUTLINE DIMENSIONS ORDERING GUIDE
Data Sheet AD7475/AD7495 AD7495 SPECIFICATIONS
VDD = 2.7 V to 5.25 V, VDRIVE = 2.7 V to 5.25 V, fSCLK = 20 MHz, TA = TMIN to TMAX, unless otherwise noted.
Table 2. Parameter A Version1 B Version
1
Unit Test Conditions/Comments
DYNAMIC PERFORMANCE Signal-to-Noise and Distortion (SINAD) 68 68 dB min fIN = 300 kHz sine wave, fSAMPLE = 1 MSPS Total Harmonic Distortion (THD) −75 −75 dB max fIN = 300 kHz sine wave, fSAMPLE = 1 MSPS Peak Harmonic or Spurious Noise −76 −76 dB max fIN = 300 kHz sine wave, fSAMPLE = 1 MSPS (SFDR) Intermodulation Distortion (IMD) Second-Order Terms −78 −78 dB typ Third-Order Terms −78 −78 dB typ Aperture Delay 10 10 ns typ Aperture Jitter 50 50 ps typ Full Power Bandwidth 8.3 8.3 MHz typ @ 3 dB Full Power Bandwidth 1.3 1.3 MHz typ @ 0.1 dB DC ACCURACY Resolution 12 12 Bits Integral Nonlinearity ±1.5 ±1 LSB max @ 5 V (typ @ 3 V) ±0.5 ±0.5 LSB typ @ 25°C Differential Nonlinearity +1.5/−0.9 +1.5/−0.9 LSB max @ 5 V guaranteed no missed codes to 12 bits (typ @ 3 V) ±0.6 ±0.6 LSB typ @ 25°C Offset Error ±8 ±8 LSB max Typically ±2.5 LSB Gain Error ±7 ±7 LSB max Typically ±2.5 LSB ANALOG INPUT Input Voltage Ranges 0 to 2.5 0 to 2.5 V DC Leakage Current ±1 ±1 µA max Input Capacitance 20 20 pF typ REFERENCE OUTPUT REF OUT Output Voltage 2.4625/2.5375 2.4625/2.5375 V min/max REF OUT Impedance 10 10 Ω typ REF OUT Temperature Coefficient 50 50 ppm/°C typ LOGIC INPUTS Input High Voltage, VINH VDRIVE − 1 VDRIVE − 1 V min Input Low Voltage, VINL 0.4 0.4 V max Input Current, IIN ±1 ±1 µA max Typically 10 nA, VIN = 0 V or VDRIVE Input Capacitance, C 2 IN 10 10 pF max LOGIC OUTPUTS Output High Voltage, VOH VDRIVE − 0.2 V min ISOURCE = 200 µA; VDD = 2.7 V to 5.25 V Output Low Voltage, VOL 0.4 0.4 V max ISINK = 200 µA Floating-State Leakage Current ±10 ±10 µA max Floating-State Output Capacitance2 10 10 pF max Output Coding Straight (Natural) Binary CONVERSION RATE Conversion Time 800 800 ns max 16 SCLK cycles with SCLK @ 20 MHz Track-and-Hold Acquisition Time 300 300 ns max Sine wave input 325 325 ns max Full-scale step input Throughput Rate 1 1 MSPS max See the Serial Interface section Rev. C | Page 5 of 24 Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM PRODUCT HIGHLIGHTS REVISION HISTORY AD7475 SPECIFICATIONS AD7495 SPECIFICATIONS TIMING EXAMPLE 1 TIMING EXAMPLE 2 ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TERMINOLOGY TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION CONVERTER OPERATION ADC TRANSFER FUNCTION TYPICAL CONNECTION DIAGRAM Analog Input Digital Inputs VDRIVE Reference Section OPERATING MODES NORMAL MODE PARTIAL POWER-DOWN MODE Power-Up Time FULL POWER-DOWN MODE POWER VS. THROUGHPUT RATE SERIAL INTERFACE MICROPROCESSOR INTERFACING AD7475/AD7495 TO TMS320C5x/C54x AD7475/AD7495 TO ADSP-21xx AD7475/AD7495 TO DSP56xxx AD7475/AD7495 TO MC68HC16 OUTLINE DIMENSIONS ORDERING GUIDE