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ADD8505WRUZ Scheda tecnica(PDF) 7 Page - Analog Devices |
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ADD8505WRUZ Scheda tecnica(HTML) 7 Page - Analog Devices |
7 / 8 page ADD8504/ADD8505/ADD8506 Rev. B | Page 7 of 8 APPLICATIONS The ADD8504/ADD8505/ADD8506 have CMOS buffers with A/B inputs to select between two different reference voltages set up by an external resistor ladder. Input bias currents are orders of magnitude less than competitive parts. This allows the use of a very large resistor ladder to save supply current. The buffer outputs are designed to drive resistive or capacitive loads. Therefore, to attain the best display performance, do not use resistors in series with these outputs. Outputs have high slew rates and 6 μs settling times. Each output delivers a mini- mum of 120 mA, ensuring a fast response to varying loads. Power supply pins on the ADD8505 and ADD8506 have multiple ground (GND) and supply (VCC) connections. Because of the high peak currents that these buffers deliver, it is recommended that all GND and VCC pins be connected and suitably bypassed. Table 6. MUX Function A/B Select Input Logic High INAx Logic Low INBx RB1 RB2 RB3 RB4 RB5 RB6 5V 5V RB7 RA1 RA2 RA3 RA4 RA5 RA6 RA7 0.1 μF 0.1 μF NOTES 1. RAx RESISTORS ARE USED TO SET POSITIVE INVERSION GAMMA VOLTAGES. 2. RBx RESISTORS ARE USED TO SET NEGATIVE INVERSION GAMMA VOLTAGES. 2 23 24 TO COLUMN DRIVERS VCOM (INVERTING SIGNAL) 5V 0.1 μF 1 3 22 4 21 5 20 6 19 7 18 8 17 9 16 10 15 10 10 14 11 12 13 Figure 12. Typical Application |
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