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DP7110 Datasheet(PDF) 6 Page - Copal Electronics |
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DP7110 Datasheet(HTML) 6 Page - Copal Electronics |
6 / 12 page DP7110, DP7118, DP7119, DP7123, DP7124, DP7125 6 Applications Information The devices are intended for circuits requiring digitally controlled adjustable resistance, such as LCD contrast control, where voltage biasing adjusts the display contrast. Alternative Positive LCD Bias Control An op amp can be used to provide buffering and gain on the output of the DP7110/DP7125. This can be done by connecting the wiper output to the positive input of a noninverting op amp as shown in Figure 9. Figure 10 shows a similar circuit for the DP7119/DP7124. Adjustable Gain Figures 11 and 12 show how to use either a variable resistor or a potentiometer to digitally adjust the gain of a noninverting op amp configuration, by connecting the device in series with a resistor to ground. The devices have a low 5 ppm/ C ratiometric tempco that allows for a very stable adjustable gain configuration over temperature. 30 V W L H +5 V DP7110/DP7125 30 V L H +5 V DP7119/DP7124 L H L H W DP7110/DP7125 DP7118/DP7123 l o r t n o C s a i B D C L e v i t i s o P . 0 1 e r u g i F l o r t n o C s a i B D C L e v i t i s o P . 9 e r u g i F t i u c r i C n i a G e l b a t s u j d A . 2 1 e r u g i F t i u c r i C n i a G e l b a t s u j d A . 1 1 e r u g i F VOUT VOUT VIN VCC VOUT VIN VCC VOUT |
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Similar Description - DP7110 |
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