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MCP3906 Datasheet(PDF) 11 Page - Microchip Technology |
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MCP3906 Datasheet(HTML) 11 Page - Microchip Technology |
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11 / 30 page  © 2009 Microchip Technology Inc. DS21948E-page 11 MCP3905/06 3.0 PIN DESCRIPTIONS The descriptions of the pins are listed in Table 3-1. TABLE 3-1: PIN FUNCTION TABLE 3.1 Digital VDD (DVDD) DVDD is the power supply pin for the digital circuitry within the MCP3905/06. DVDD requires appropriate bypass capacitors and should be maintained to 5V ±10% for specified operation. Please refer to Section 5.0 “Applications Information”. 3.2 High-Pass Filter Input Logic Pin (HPF) HPF controls the state of the high-pass filter in both input channels. A logic ‘1’ enables both filters, removing any DC offset coming from the system or the device. A logic ‘0’ disables both filters, allowing DC voltages to be measured. 3.3 Analog VDD (AVDD) AVDD is the power supply pin for the analog circuitry within the MCP3905/06. AVDD requires appropriate bypass capacitors and should be maintained to 5V ±10% for specified operation. Please refer to Section 5.0 “Applications Information”. MCP3905/06 Symbol Definition SSOP-24 1DVDD Digital Power Supply Pin 2 HPF High-Pass Filters Control Logic Pin 3AVDD Analog Power Supply Pin 4 NC No Connect 5 CH0+ Non-Inverting Analog Input Pin for Channel 0 (Current Channel) 6 CH0- Inverting Analog Input Pin for Channel 0 (Current Channel) 7 CH1- Inverting Analog Input Pin for Channel 1 (Voltage Channel) 8 CH1+ Non-Inverting Analog Input Pin for Channel 1 (Voltage Channel) 9MCLR Master Clear Logic Input Pin 10 REFIN/OUT Voltage Reference Input/Output Pin 11 AGND Analog Ground Pin, Return Path for internal analog circuitry 12 F2 Frequency Control for HFOUT Logic Input Pin 13 F1 Frequency Control for FOUT0/1 Logic Input Pin 14 F0 Frequency Control for FOUT0/1 Logic Input Pin 15 G1 Gain Control Logic Input Pin 16 G0 Gain Control Logic Input Pin 17 OSC1 Oscillator Crystal Connection Pin or Clock Input Pin 18 OSC2 Oscillator Crystal Connection Pin or Clock Output Pin 19 NC No Connect 20 NEG Negative Power Logic Output Pin 21 DGND Digital Ground Pin, Return Path for Internal Digital Circuitry 22 HFOUT High-Frequency Logic Output Pin (Intended for Calibration) 23 FOUT1 Differential Mechanical Counter Logic Output Pin 24 FOUT0 Differential Mechanical Counter Logic Output Pin |
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