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MAX5161MEUT Datasheet(PDF) 6 Page - Maxim Integrated Products |
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MAX5161MEUT Datasheet(HTML) 6 Page - Maxim Integrated Products |
6 / 8 page Alternative Positive LCD Bias Control Alternatively, use an op amp to provide buffering and gain to the output of the MAX5160/MAX5161. Connect the MAX5160 to the positive input of a noninverting op amp (Figure 3) to select a portion of the input signal by digitally controlling the wiper terminal. Figure 4 shows a similar circuit for the MAX5161. Adjustable Gain Figure 5 shows how to use the MAX5161 to digitally adjust the gain of a noninverting op amp configuration. Connect the MAX5161 in series with a resistor to ground to form the adjustable gain control of a noninverting amplifier. The MAX5160/MAX5161 have a low 5ppm/°C ratiometric tempco that allows for a very stable adjust- able gain configuration over temperature. Serial Interface Figure 6 is the serial-interface timing diagram. Low-Power Digital Potentiometers 6 _______________________________________________________________________________________ GAIN 6 30V W L H INC CS GND +5V +5V VOUT VDD U/D MAX5160 Figure 3. MAX5160 Positive LCD Bias Control GAIN 6 30V L H GND +5V +5V VOUT VDD INC U/D MAX5161 Figure 4. MAX5161 Positive LCD Bias Control VCC L H GND VIN +5V a) b) VOUT VDD INC U/D VCC L H W VIN VOUT MAX5161 MAX5160 Figure 5. Adjustable Gain Circuit: a) MAX5161; b) MAX5160 |
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