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MCP47CMB21 Datasheet(PDF) 2 Page - Microchip Technology |
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MCP47CMB21 Datasheet(HTML) 2 Page - Microchip Technology |
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2 / 124 page  MCP47CXBXX DS20006089B-page 2 2018-2019 Microchip Technology Inc. General Description The MCP47CXBXX devices are single and dual channel 8-bit, 10-bit and 12-bit buffered voltage output Digital-to-Analog Converters (DAC) with volatile or MTP memory, and an I2C serial interface. The MTP memory can be written by the user up to 32 times for each specific register. It requires a high- voltage level on the HVC pin, typically 7.5V, in order to successfully program the desired memory location. The nonvolatile memory includes power-up output values, device Configuration registers and general purpose memory. The VREF pin, the device VDD or the internal band gap voltage can be selected as the DAC’s reference voltage. When VDD is selected, VDD is internally connected to the DAC reference circuit. When the VREF pin is used with an external voltage reference, the user can select between a gain of 1 or 2 and can have the reference buffer enabled or disabled. When the gain is 2, the VREF pin voltage should be limited to a maximum of VDD/2. These devices have a two-wire I2C compatible serial interface for Standard (100 kHz), Fast (400 kHz) or High-Speed (1.7 MHz and 3.4 MHz) modes. Applications • Set Point or Offset Trimming • Sensor Calibration • Low-Power Portable Instrumentation • PC Peripherals • Data Acquisition Systems MCP47CMBX1 Block Diagram (Single-Channel Output) VDD VSS Memory SDA SCL VREF1:VREF0 A0 A1 VOUT0 VDD PD1:PD0 VREF1:VREF0 OP AMP ADDR6:ADDR0 PD1:PD0 and VREF1:VREF0 DAC0 VREF POWER-DOWN GAIN STATUS DAC0 VREF POWER-DOWN GAIN/I2C ADDRESS WiperLock™ VOLATILE (4x16) NONVOLATILE (13x16) Band Gap 1.214V VDD VIHH LAT0 VBG LAT/HVC VREF0 Power-up/Brown-out Control I2C Serial Interface Module and Control Logic (WiperLock™ Technology) GAIN |
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