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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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TDA8757 датащи(PDF) 26 Page - NXP Semiconductors |
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TDA8757 датащи(HTML) 26 Page - NXP Semiconductors |
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26 / 37 page  Philips Semiconductors TDA8757 Triple 8-bit ADC 170 Msps Preliminary data Rev. 07 — 28 February 2002 26 of 37 9397 750 09457 © Koninklijke Philips Electronics N.V. 2002. All rights reserved. ENOB [2] effective number of bits − 7.4 − bits Signal-to-noise ratio S/N signal-to-noise ratio fclk = 170 MHz − 46 − dB Spurious free dynamic range SFDR spurious free dynamic range fclk = 170 MHz − 57 − dB Clock timing output (CKDATA) ηext ADC clock duty factor 45 50 55 % fclk(max) maximum clock frequency −− 170 MHz Clock timing input (CKEXT) fclk(max) maximum clock frequency −− 170 MHz tCPH clock pulse width HIGH 2.5 −− ns tCPL clock pulse width LOW 2.5 −− ns Data timing [3] td(s) sampling delay time all times referenced to 50% of the rising edge of CKDATA; see Figure 10 −−7.5 − ns tsu(d)(o) output data set-up time −−7 − ns th(o) output hold time − 1 − ns 3-state output delay time tdZH output enable HIGH − 15 − ns tdZL output enable LOW − 18 − ns tdHZ output disable HIGH − 13 − ns tdLZ output disable LOW − 10 − ns Data and sync outputs VOL LOW-level output voltage Io =1mA −− 0.4 V VOH HIGH-level output voltage Io =1mA 2.4 −− V IOL LOW-level output current VOL = 0.2 V − 0.2 − mA IOH HIGH-level output current VOH = 3.4 V − 0.3 − mA CL load capacitance − 10 − pF TTL digital inputs (CKREF, COAST, INV, HSYNC, CLP, PD, DIS, I2C/3W, OE, CKEXT) VIL LOW-level input voltage −− 0.8 V VIH HIGH-level input voltage 2.0 −− V IIL LOW-level input current − 400 −µA IIH HIGH-level input current − 35 −µA Zi input impedance − tbf − k Ω Ci input capacitance − tbf − pF Sync on green input Vsync(G) sync on green pulse amplitude [4] Slevel = 0; see Figure 5 300 − 600 mV Slevel = 1; see Figure 5 150 − 300 mV Table 17: Characteristics…continued VCCA = 4.75 V to 5.25 V (referenced to AGND); VCCD = 4.75 V to 5.25 V (referenced to DGND); VDDD = 4.75 V to 5.25 V (referenced to VSSD); VCCO = 4.75 V to 5.25 V (referenced to OGND); AGND, DGND, OGND and VSS connected together; Tamb = 0 to 70 °C; typical values measured at VCCA =VDDD =VCCD =VCCO = 5 V and Tamb =25 °C; unless otherwise specified. Symbol Parameter Conditions Min Typ Max Unit |
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