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MAX5203BEUB Datasheet(PDF) 11 Page - Maxim Integrated Products |
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MAX5203BEUB Datasheet(HTML) 11 Page - Maxim Integrated Products |
11 / 13 page Low-Cost, Voltage-Output, 16-Bit DACs with Internal Reference in µMAX ______________________________________________________________________________________ 11 Bipolar Configuration The MAX5200–MAX5203 are designed for unipolar opera- tion, but can be used in bipolar applications with an exter- nal amplifier and resistors. Figure 5 shows the MAX5200–MAX5203 configured for bipolar operation. The op amp is set for unity gain. Table 1 lists the offset binary code for this circuit. The output voltage range is ±VREF. Layout Considerations Digital and AC transient signals coupling to AGND can create noise at the output. Connect AGND to the high- est quality ground available. Use proper grounding techniques, such as a multilayer board with a low- inductance ground plane. Wire-wrapped boards and sockets are not recommended. For optimum system performance, use printed circuit (PC) boards with sep- arate analog and digital ground planes. Connect the two ground planes together at the low-impedance power-supply source. Connect DGND and AGND pins together at the IC. The best ground connection is achieved by connecting the DAC’s DGND and AGND together, and then connecting that point to the system analog ground plane. If the DAC’s DGND is connected to the system digital ground, digital noise can get through the DAC’s analog portion. Chip Information TRANSISTOR COUNT: 8764 PROCESS: BiCMOS CLR AGND VDD REF DIN SCLK CS DGND BIPOLAR OUT ( ±VREF) LDAC OUT MC68XXXX 10 µF 0.1 µF PCS0 MOSI SCLK +5V -5V MAX5200– MAX5203 MAX400 Figure 5. MAX5200–MAX5203 Typical Operating Circuit—Bipolar Output DAC LATCH CONTENTS MSB LSB ANALOG OUTPUT, VOUT 1111 1111 1111 1111 +VREF × (32,767 / 32,768) 1000 0000 0000 0001 +VREF × (1 / 32,768) 1000 0000 0000 0000 0V 0111 1111 1111 1111 -VREF × (1 / 32,768) 0000 0000 0000 0000 -VREF × (32,768 / 32,768) Table 1. Bipolar Code Table |
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