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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AD974 датащи(PDF) 3 Page - Analog Devices |
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AD974 датащи(HTML) 3 Page - Analog Devices |
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3 / 20 page  REV. A –3– AD974 A Grade B Grade Parameter Conditions Min Typ Max Min Typ Max Units DIGITAL OUTPUTS Data Format Serial 16 Bits Data Coding Straight Binary VOL ISINK = 1.6 mA +0.4 +0.4 V VOH ISOURCE = 500 µA+4 +4 V Output Capacitance High-Z State 15 15 pF Leakage Current High-Z State VOUT = 0 V to VDIG ±5 ±5 µA POWER SUPPLIES Specified Performance VDIG +4.75 +5 +5.25 +4.75 +5 +5.25 V VANA +4.75 +5 +5.25 +4.75 +5 +5.25 V IDIG 4.5 4.5 mA IANA 14 14 mA Power Dissipation PWRD LOW 120 120 mW PWRD HIGH 50 50 µW TEMPERATURE RANGE Specified Performance TMIN to TMAX –40 +85 –40 +85 °C NOTES 1LSB means Least Significant Bit. With a ±10 V input, one LSB is 305 µV. 2Typical rms noise at worst case transitions and temperatures. 3Full-Scale Error is expressed as the % difference between the actual full-scale code transition voltage and the ideal full-scale transition voltage, and includes the effect of offset error. For bipolar input, the Full-Scale Error is the worst case of either the –Full-Scale or +Full-Scale code transition voltage errors. For unipolar input ranges, Full-Scale Error is with respect to the +Full-Scale code transition voltage. 4External 2.5 V reference connected to REF. 5All specifications in dB are referred to a full-scale ±10 V input. 6Full-Power Bandwidth is defined as full-scale input frequency at which Signal-to-(Noise + Distortion) degrades to 60 dB, or 10 bits of accuracy. 7Recovers to specified performance after a 2 × FS input overvoltage. Specifications subject to change without notice. TIMING SPECIFICATIONS Parameter Symbol Min Typ Max Units Convert Pulsewidth t1 50 ns R/ C, CS to BUSY Delay t2 100 ns BUSY LOW Time t3 4.0 µs BUSY Delay after End of Conversion t4 50 ns Aperture Delay t5 40 ns Conversion Time t6 3.8 4.0 µs Acquisition Time t7 1.0 µs Throughput Time t6 + t7 5 µs R/ C Low to DATACLK Delay t8 220 ns DATACLK Period t9 220 ns DATA Valid Setup Time t10 50 ns DATA Valid Hold Time t11 20 ns EXT. DATACLK Period t12 66 ns EXT. DATACLK HIGH t13 20 ns EXT. DATACLK LOW t14 30 ns R/ C, CS to EXT. DATACLK Setup Time t15 20 t12 + 5 ns R/ C to CS Setup Time t16 10 ns EXT. DATACLK to SYNC Delay t17 15 66 ns EXT. DATACLK to DATA Valid Delay t18 25 66 ns CS to EXT. DATACLK Rising Edge Delay t19 10 ns Previous DATA Valid after CS, R/C Low t20 3.5 µs BUSY to EXT. DATACLK Setup Time t21 5ns Final EXT. DATACLK to BUSY Rising Edge t22 1.7 µs A0, A1 to WR1, WR2 Setup Time t23 10 ns A0, A1 to WR1, WR2 Hold Time t24 10 ns WR1, WR2 Pulsewidth t25 50 ns Specifications subject to change without notic e. (fS = 200 kHz, VDIG = VANA = +5 V, –40 C to +85 C) |
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