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CDB5014 Scheda tecnica(PDF) 2 Page - Cirrus Logic |
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CDB5014 Scheda tecnica(HTML) 2 Page - Cirrus Logic |
2 / 7 page Analog Input The analog input to the A/D converter is supplied through the BNC coaxial connector labeled AIN. Analog input polarity is controlled by the first position switch on the DIP-switch, SW-1. If it is on, the input is unipolar ranging from GND to VREF. If the switch is off, the input range is bi- polar with the magnitude of the reference voltage defining both zero- and full-scale ( ±VREF). The A/D converter’s internal analog input buffer requires a source impedance of less than 400 Ω at 1MHz for stability. Acquisition and throughput are specified assuming a dc source impedance of less than 200 Ω. Infinitely large dc source imped- ances can be accommodated by adding capaci- tance (typically 1000pF) from the analog input to ground. However, high dc source resistances de- grade acquisition time and consequently through- put. CS EOC D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13 D14 D15 A0 2 3 4 5 6 7 8 9 12 13 14 15 16 17 18 19 38 21 22 23 VD- VD+ + 36 11 10 C1 C2 C3 C4 VA- VA+ 25 27 30 C5 C6 C10 C11 + SCLK SDATA AIN CLKIN 39 40 26 20 32 VREF 28 RESET 31 TST 29 REFBUF R10 C7 R8 R9 SW2 VD+ U1 Reset VD+ R23 (optional) VA- D0 C12 SW1-4 + + 37 EOT HOLD 1 R3 +5V -5V VD+ VD- R1 R2 VA+ VA- RD R7 R5 VD+ R4 24 34 35 BP/UP CAL INTLV SW1-1 SW1-2 SW1-3 33 BW R12 R13 R11 R6 CS5012A CS5014 CS5016 CS5012 Figure 1. CDB5012, CDB5012A, CDB5014, CDB5016 Schematic (Reference Circuitry Appears in Figure 3) CDB5012, CDB5012A, CDB5014, CDB5016 DS14DB11 2 |
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Descrizione simile - CDB5014 |
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