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ADP1046ACPZ-R7 Datasheet(PDF) 54 Page - Analog Devices |
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ADP1046ACPZ-R7 Datasheet(HTML) 54 Page - Analog Devices |
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54 / 96 page  ADP1046 Data Sheet Rev. 0 | Page 54 of 96 Table 24. Register 0x18—CS2 Value (Output Current) Bits Bit Name R/W Description [15:4] Output current value R This register contains the 12-bit output current information. This value is the voltage drop across the sense resistor. To obtain the current value, the user must divide the value of this register by the sense resistor value (see the CS2+, CS2− Pins section). The CS2± pins have a full-scale input range of 120 mV or 60 mV (set in Register 0x27[5]). This value has 12 bits of resolution; the LSB step size depends on the input range value. When the CS2 input range is set to 120 mV, the LSB step size is 29.30 μV. For example, at a 30 mV input signal on CS2, the value in this register is 30 mV/29.30 μV = 1024 (0x400). When the CS2 input range is set to 60 mV, the LSB step size is 14.65 μV. For example, at a 30 mV input signal on CS2, the value in this register is 30 mV/14.65 μV = 2048 (0x800). [3:0] Reserved R Reserved. Table 25. Register 0x19—CS2 × VS3 Value (Output Power) Bits Bit Name R/W Description [15:0] Output power value R This register contains the 16-bit output power information. This value is the product of the remote output voltage value (VS3) and the output current reading (CS2). See the Power Readings section for the formulas needed to convert this digital reading into power information. Table 26. Register 0x1A—RTD Temperature Value Bits Bit Name R/W Description [15:4] Temperature value R This register contains the 12-bit output temperature information, as determined from the RTD pin. The range of the RTD pin is from 0 V to 1.6 V. This value has 12 bits of resolution, which results in an LSB size of 390.625 μV. At 0 V input, the value in this register is 0 (0x000). The recommended nominal voltage at this pin is 1 V. At 1 V input, these bits read 2560 (0xA00). [3:0] Reserved R Reserved. Table 27. Register 0x1B—Read Temperature Bits Bit Name R/W Description [7:0] Read temperature R/W This register returns an 8-bit temperature in °C (unsigned decimal format). For this feature to function correctly, the external thermistor must be 100 kΩ with a 16.5 kΩ, 1% resistor in parallel, and the selected current source must be trimmed to 46 μA by selecting 40 μA in Register 0x11[7:6] and using the current trim (fine-trim) bits in Register 0x11[5:0]. Table 28. Register 0x1C—RTD Offset Trim (MSB) Bits Bit Name R/W Description [7:2] Reserved R Reserved. 1 Trim polarity R/W Setting this bit to 1 means that negative offset is introduced. Setting this bit to 0 means that positive offset is introduced. 0 RTD offset trim (MSB) R/W This bit is the MSB of the RTD offset trim. Together with Register 0x20 (the LSBs), this bit sets the amount of offset trim that is applied to the RTD ADC reading. Table 29. Register 0x1D—Share Bus Value Bits Bit Name R/W Description [7:0] Share bus value R This register contains the 8-bit share bus voltage information. If the power supply is the master, this register outputs 0. Table 30. Register 0x1E—Modulation Value Bits Bit Name R/W Description [7:0] Modulation value R This register contains the 8-bit modulation information. It outputs the amount of modulation from 0% to 100% that is being placed on the modulating edges. Table 31. Register 0x1F—Line Impedance Value Bits Bit Name R/W Description [7:0] Line impedance value R This register contains the 8-bit line impedance information. This value is (VS2 − VS3)/CS2. |
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