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MCP3426 Datasheet(PDF) 6 Page - Microchip Technology |
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MCP3426 Datasheet(HTML) 6 Page - Microchip Technology |
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6 / 56 page  MCP3426/7/8 DS22226A-page 6 © 2009 Microchip Technology Inc. Offset Error VOS — 30 — µV PGA = 1 DR = 15 SPS Offset Drift vs. Temperature — 50 — nV/°C Common-Mode Rejection — 105 — dB at DC and PGA =1, — 110 — dB at DC and PGA =8, TA = +25°C Gain vs. VDD — 5 — ppm/V TA = +25°C, VDD = 2.7V to 5.5V, PGA = 1 Power Supply Rejection at DC Input — 100 — dB TA = +25°C, VDD = 2.7V to 5.5V, PGA = 1 Power Requirements Voltage Range VDD 2.7 — 5.5 V Supply Current during Conversion IDDA — 145 180 µA VDD = 5.0V — 135 — µA VDD = 3.0V Supply Current during Standby Mode IDDS —0.3 1 µA VDD = 5.0V I2C Digital Inputs and Digital Outputs High level input voltage VIH 0.7VDD —VDD V at SDA and SCL pins Low level input voltage VIL — — 0.3VDD V at SDA and SCL pins Low level output voltage VOL —— 0.4 V I OL = 3 mA Hysteresis of Schmidt Trigger for inputs (Note 7) VHYST 0.05VDD —— V fSCL = 100 kHz Supply Current when I2C bus line is active IDDB — — 10 µA Device is in standby mode while I2C bus is active Input Leakage Current IILH —— 1 µA VIH = 5.5V IILL -1 — — µA VIL = GND Logic Status of I2C Address Pins (Note 8) Adr0 and Adr1 Pins Addr_Low VSS —0.2VDD V The device reads logic low. Adr0 and Adr1 Pins Addr_High 0.75VDD —VDD V The device reads logic high. Adr0 and Adr1 Pins Addr_Float 0.35VDD —0.6VDD V Read pin voltage if voltage is applied to the address pin. (Note 9) —VDD/2 — Device outputs float output voltage (VDD/2) on the address pin, if left “floating”. (Note 10) Pin Capacitance and I2C Bus Capacitance Pin capacitance CPIN —4 10 pF I2C Bus Capacitance Cb —— 400 pF ELECTRICAL CHARACTERISTICS (CONTINUED) Electrical Specifications: Unless otherwise specified, all parameters apply for TA = -40°C to +85°C, VDD = +5.0V, VSS = 0V, CHn+ = CHn- = VREF/2, VINCOM = VREF /2. All ppm units use 2*VREF as differential full scale range. Parameters Sym Min Typ Max Units Conditions Note 1: Any input voltage below or greater than this voltage causes leakage current through the ESD diodes at the input pins. This parameter is ensured by characterization and not 100% tested. 2: This input impedance is due to 3.2 pF internal input sampling capacitor. 3: This parameter is ensured by design and not 100% tested. 4: The total conversion speed includes auto-calibration of offset and gain. 5: INL is the difference between the endpoints line and the measured code at the center of the quantization band. 6: Includes all errors from on-board PGA and VREF. 7: This parameter is ensured by characterization and not 100% tested. 8: MCP3427 and MCP3428 only. 9: Addr_Float voltage is applied at address pin. 10: No voltage is applied at address pin (left “floating”). |
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