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ISL54415 Scheda tecnica(PDF) 10 Page - Intersil Corporation |
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ISL54415 Scheda tecnica(HTML) 10 Page - Intersil Corporation |
10 / 14 page 10 FN6318.1 June 27, 2006 Figure 15 shows the measured gain and phase of a 3.58MHz, 300MVP-P signal at the output of the switch relative to the signal at the input of the switch as you vary the DC offset of the signal from 0V to 1V using a network analyzer. The data from the sweep was used to calculated the differential gain (DG) and differential phase (DP). Over luminance range of 0V to 1V: DG = 0.03% and DP = 0.05°. Over luminanace range of 0V to 0.7V: DG = 0.03% and DP = 0.03°. DG and DP plot using an actual NTSC video signal is shown in Figure 16. DG = 0.05% and DP = 0.02°. These NC switches are uni-directional switches. The audio/video sources should be connected at the NC side of the switch (pins 7 and 8) and the speaker load and video receiver should be connected at the COM side of the switch (pins 3 and 4). For the ISL54415 and ISL54416 parts the NC audio/video switches are active (turned ON) whenever the VBUS voltage is ≤ VDD + 0.2V. The VBUS pin is internally pulled low through a pull-down resistor allowing the VBUS pin to float. When the VBUS pin is floating the NC audio/video switches are ON. Note: Whenever the audio/video switches are ON the USB transceivers need to be in the high impedance state or static high or low state to keep from interfering with the audio/video transmission. For the ISL54417 part the NC1 audio/video switch is active (turned ON) whenever logic pin IN1 (pin 10) is LOW. The NC2 audio/video switch is active (turned ON) whenever the logic pin IN2 (pin 2) is LOW. Unlike the ISL54415 and ISL54416 parts were the two SPDT switches work in tandem, the ISL54417 gives you independent control over each SPDT switch. NO1 and NO2 USB Switches The two NO (normally open) USB switches (NO1, NO2) are 5 Ω bidirectional switches that were designed to pass low speed and full-speed USB differential signals typically in the range of 0V to 3.6V. The switches have low capacitance (0.47pF) and high bandwidth (239MHz) to pass USB full- speed signals (12Mbps) with minimum edge and phase distortion to meet USB 2.0 signal quality specifications. See Figure 12 for full-speed USB eye diagram. For the ISL54415 and ISL54416 parts the maximum signal range for the USB switches is from -1.5V to VBUS. The signal voltage should not be allow to exceed the VBUS voltage rail or go below ground by more than -1.5V. For the ISL54417 part the maximum signal range is from -1.5V to VDD. The signal voltage should not be allowed to exceed the VDD voltage rail or go below ground by more than -1.5V. When using the ISL54415 and ISL54416 parts the USB switches are active (turned ON) whenever the VBUS voltage is ≥VDD + 0.8V. VBUS is internally pulled low, so when VBUS is floating the USB switches are OFF. Note: Whenever the USB switches are ON the audio and video drivers need to be at AC or DC ground or floating to keep from interfering with the data transmission. When using the ISL54417 part the NO1 USB switch is active (turned ON) whenever logic pin IN1 (pin 10) is HIGH. The NO2 USB switch is active (turned ON) whenever the logic pin IN2 (pin 2) is HIGH. Unlike the ISL54415 and ISL54416 parts were the two SPDT switches work in tandem, the ISL54417 gives you independent control over each SPDT switch. FIGURE 8. VECTOR-SCOPE PLOT BEFORE SWITCH FIGURE 9. VECTOR-SCOPE PLOT AFTER SWITCH ISL54415, ISL54416, ISL54417 |
Codice articolo simile - ISL54415 |
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Descrizione simile - ISL54415 |
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