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AD7945AN-B Datasheet(PDF) 4 Page - Analog Devices |
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AD7945AN-B Datasheet(HTML) 4 Page - Analog Devices |
4 / 16 page AD7943/AD7945/AD7948 REV. B –4– AC PERFORMANCE CHARACTERISTICS NORMAL MODE Parameter B Grades T Grade Units Test Conditions/Comments DYNAMIC PERFORMANCE Output Voltage Settling Time 600 700 ns typ To 0.01% of Full-Scale Range. VREF = +10 V; DAC Latch Alternately Loaded with All 0s and All 1s Digital to Analog Glitch Impulse 60 60 nV-s typ Measured with VREF = 0 V. DAC Latch Alternately Loaded with All 0s and All 1s Multiplying Feedthrough Error –75 –75 dB max DAC Latch Loaded with All 0s Output Capacitance 60 60 pF max All 1s Loaded to DAC 30 30 pF max All 0s Loaded to DAC Digital Feedthrough (AD7943) 5 5 nV-s typ Feedthrough to the DAC Output with LD1, LD2 High and Alternate Loading of All 0s and All 1s into the Input Shift Register Digital Feedthrough (AD7945, AD7948) 5 5 nV-s typ Feedthrough to the DAC Output with CS High and Alternate Loading of All 0s and All 1s to the DAC Bus Total Harmonic Distortion –83 –83 dB typ Output Noise Spectral Density @ 1 kHz 35 35 nV/ √Hz typ All 1s Loaded to DAC. V REF = 0 V. Output Op Amp Is OP07 Specifications subject to change without notice. (AD7943: VDD = +4.5 V to +5.5 V; VIOUT1 = VIOUT2 = AGND = 0 V. AD7945, AD7948: VDD = +4.5 V to +5.5 V; VIOUT1 =AGND = 0 V. VREF = 6 V rms, 1 kHz sine wave; TA = TMIN to TMAX; DAC output op amp is AD843; unless otherwise noted.) These characteristics are in- cluded for Design Guidance and are not subject to test. AC PERFORMANCE CHARACTERISTICS BIASED MODE (AD7943: VDD = +3 V to +5.5 V; VIOUT1 = VIOUT2 = AGND = 1.23 V. AD7945, AD7948: VDD = +3 V to +5.5 V; VIOUT1 = AGND = 1.23 V. VREF = 1 kHz, 2.45 V p-p, sine wave biased at 1.23 V; DAC output op amp is AD820; TA = TMIN to TMAX; unless otherwise noted.) These characteristics are included for Design Guidance and are not subject to test. Parameter A Grades Units Test Conditions/Comments DYNAMIC PERFORMANCE Output Voltage Settling Time 5 µs typ To 0.01% of Full-Scale Range. VREF = 0 V DAC Latch Alternately Loaded with All 0s and All 1s Digital to Analog Glitch Impulse 60 nV-s typ VREF = 1.23 V. DAC Register Alternately Loaded with All 0s and All 1s Multiplying Feedthrough Error –75 dB max DAC Latch Loaded with All 0s Output Capacitance 60 pF max All 1s Loaded to DAC 30 pF max All 0s Loaded to DAC Digital Feedthrough 5 nV-s typ Feedthrough to the DAC Output with LD1, LD2 High and Alternate Loading of All 0s and All 1s into the Input Shift Register Digital Feedthrough (AD7945, AD7948) 5 nV-s typ Feedthrough to the DAC Output with CS High and Alternate Loading of All 0s and All 1s to the DAC Bus Total Harmonic Distortion –83 dB typ Output Noise Spectral Density @ 1 kHz 25 nV/ √Hz typ All 1s Loaded to DAC. VREF = 1.23 V Specifications subject to change without notice. |
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