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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AD7118CQ датащи(PDF) 2 Page - Analog Devices |
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AD7118CQ датащи(HTML) 2 Page - Analog Devices |
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2 / 6 page  AD7118–SPECIFICATIONS (VDD = +5 V or +15 V, VIN = –10 V dc, IOUT = AGND = DGND = 0 V, output amplifier AD544 except where noted) Accuracy Specification for L/C/U Grade Devices at TA = +25°C REV. A –2– TA = +25 CTA = TMIN, TMAX Parameter VDD = +5 V VDD = +15 V VDD = +5 V VDD = +15 V Units Test Conditions/Comments NOMINAL RESOLUTION 1.5 1.5 1.5 1.5 dB ACCURACY RELATIVE TO VIN AD7118L/C/U 0 dB to –30 dB ±0.35 ±0.35 ±0.4 ±0.4 dB max Accuracy is measured using –31.5 dB to –42 dB ±0.7 ±0.5 ±0.8 ±0.7 dB max circuit of Figure 1 and includes –43.5 dB to –48 dB ±1.0 ±0.7 ±1.3 ±1.0 dB max any effects due to mismatch AD7118K/B/T between RFB and the R-2R 0 dB to –30 dB ±0.5 ±0.5 ±0.5 ±0.5 dB max ladder circuit. –31.5 dB to –42 dB ±0.75 ±0.75 ±1.0 ±0.8 dB max MONOTONIC RANGE Nominal 1.5 dB Steps L/C/U Grade Monotonic Over Full 0 to –72 0 to –72 dB Digital Inputs 000000 to 110000 K/B/T Grade Code Range 0 to –66 0 to –66 dB Digital Inputs 000000 to 101100 Nominal 3 dB Steps All Grades Monotonic Over Full Code Range VIN INPUT RESISTANCE All Grades 9 9 9 9 k Ω min (PIN 12) L/C/U Grade 17 17 17 17 k Ω max K/B/T Grade 21 21 21 21 k Ω max RFB INPUT RESISTANCE All Grades 9.45 9.45 9.45 9.45 k Ω min (PIN 13) L/C/U Grade 18 18 18 18 k Ω max K/B/T Grade 22 22 22 22 k Ω max DIGITAL INPUTS Input High Voltage Requirements VIH 3.0 13.5 3.0 13.5 V min Input Low Voltage Requirements VIL 0.8 1.5 0.8 1.5 V max Input Leakage Current ±1 ±1 ±10 ±10 µA max Digital Inputs = VDD POWER SUPPLY VDD for Specified Accuracy 5 – 5 – V min – 15 – 15 V max IDD 0.5 1 1 2 mA max Digital Inputs = 0 V or VDD (See Figure 7) Specifications subject to change without notice. AC PERFORMANCE CHARACTERISTICS These characteristics are included for design guidance only and are not subject to test. TA = +25 CTA = TMIN, TMAX Parameter VDD = +5 V VDD = +15 V VDD = +5 V VDD = +15 V Units DC Supply Rejection, ∆Gain/∆V DD 0.01 0.005 0.01 0.005 dB per % max ∆V DD = ± 10%, Input code = 100000 Propagation Delay 1.8 0.4 2.2 0.5 µs max Full-Scale Change Digital-to-Analog Glitch Impulse 225 1200 – – nV secs typ Measured with ADLH0032CG as output amplifier for input code transition 100000 to 000000. C1 of Figure 1 is 0 pF. Output Capacitance (Pin 14) 100 100 100 100 pF max Input Capacitance Pin 12 and Pin 13 7 7 7 7 pF max Feedthrough at 1 kHz L/C/U Grade –86 –86 –68 –68 dB max Feedthrough is also deter- K/B/T Grade –80 –80 –63 –63 dB max mined by circuit layout Total Harmonic Distortion –85 –85 –85 –85 dB typ VIN = 6 V rms Intermodulation Distortion –79 –79 –79 –79 dB typ per DIN 45403 Blatt 4 Output Noise Voltage Density 70 70 70 70 nV/ √Hz max Includes AD544 amplifier noise Digital Input Capacitance 7 7 7 7 pF max Specifications subject to change without notice. (VDD = +5 V or +15 V, VIN = –10 V except where stated, IOUT = AGND = DGND = 0 V, output amplifier AD544 except where noted) Accuracy Specification for K/B/T Grade Devices at TA = +25°C |
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