Datasheet PAC1811 (Microchip) - 3

link to page 3 link to page 3
PAC1811 1.0 ELECTRICAL CHARACTERISTICS 1.1 Absolute Maximum Ratings (†)
Supply Voltage (VDD) . -0.3V to +6V Voltage on VBUS+ pin . -0.3V to +75V Voltage on VSENSE+ and VSENSE– pins . -0.3V to +75V Voltage on PWRDN pin to GND . -0.3V to VDD Voltage on any other pin to GND . -0.3V to +6V Voltage between VSENSE pins (|VSENSE+ – VSENSE–|). .1V Input Current to any pin except VDD . .±100 mA Output Short Circuit Current . continuous Operating Temperature (TA) . .-40°C to +125°C Storage Temperature (TSTG). .-55°C to +150°C ESD Rating – All Pins – Human Body Model (VHBM) . 4 kV ESD Rating – All Pins – Charge Device Model (VCDM) . 2 kV
† Notice:
Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and the functional operation of the device at these or any other conditions above those indicated in the operation listings of this specification is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability. Figure 1-1 shows the electrostatic discharge (ESD) protection circuitry found on PAC1811. The voltage on the sense pins (VSENSE+ and VSENSE–) can be at 42V (75V absolute maximum) if VDD = 0V.
Floating ESD Rail
Clamp Circuit SDA SCL PWRDN
(1)
A0/ A0 ALE L RT A1/ A1 ALE L RT VDD GND VSENSE– ~75V Breakdown
NOTE: 1.
Circuitry colored blue available only for the 10-Lead VDFN PAC1811. VSENSE+ VBUS+(
1
)
FIGURE 1-1:
PAC1811 ESD Protection Circuitry.  2025 Microchip Technology Inc. and its subsidiaries DS20007066B-page 3 Document Outline Single-Channel Power Monitor with Accumulator, 42V Full Scale Range Features Applications Description Package Types Functional Block Diagram 1.0 Electrical Characteristics 1.1 Absolute Maximum Ratings (†) FIGURE 1-1: PAC1811 ESD Protection Circuitry. 1.2 DC Electrical Specifications 1.3 AC Electrical Specifications 1.4 Temperature Specifications 2.0 Typical Performance Curves FIGURE 2-1: VSENSE Error vs. VSENSE, TA = 25°C, Multiple VDD, Unipolar Mode. FIGURE 2-2: VSENSE Error vs. VSENSE, TA = 25°C, Multiple VDD, Bipolar FSR Mode. FIGURE 2-3: VSENSE Error vs. VSENSE, VDD = 5.5V, Multiple TA, Bipolar FSR Mode. FIGURE 2-4: VSENSE Error vs. VSENSE, VDD = 2.7V, Multiple TA, Bipolar FSR Mode. FIGURE 2-5: VSENSE Error vs. VSENSE, VDD = 5.5V, Multiple TA, Unipolar Mode. FIGURE 2-6: VSENSE Error vs. VSENSE, VDD = 2.7V, Multiple TA, Unipolar Mode. FIGURE 2-7: VSENSE Error vs. VSENSE, VDD = 5.5V, Multiple TA, Unipolar Mode, Logarithmic Scale. FIGURE 2-8: VSENSE Error vs. VSENSE, VDD = 2.7V, Multiple TA, Unipolar Mode, Logarithmic Scale. FIGURE 2-9: VSENSE Error vs. VSENSE, VDD = 5.5V, Multiple TA, Bipolar FSR Mode, Zoom View. FIGURE 2-10: VSENSE Error vs. VSENSE, VDD = 2.7V, Multiple TA, Bipolar FSR Mode, Zoom View. FIGURE 2-11: VBUS Error vs. VBUS, VDD = 3.3V, TA = 25°C, Unipolar Mode, Logarithmic Scale. FIGURE 2-12: VBUS Error vs. VBUS, VDD = 3.3V, Multiple TA, Unipolar Mode, Logarithmic Scale. FIGURE 2-13: VBUS Error vs. VBUS, VDD = 3.3V, Multiple TA, Unipolar Mode, Logarithmic Scale, Zoom View. FIGURE 2-14: VBUS Error vs. VBUS, VDD = 3.3V, Multiple TA, Bipolar FSR Mode. FIGURE 2-15: VBUS Error vs. VBUS, VDD = 3.3V, Multiple TA, Bipolar FSR Mode, Zoom View. FIGURE 2-16: VBUS Error vs. VBUS, VDD = 3.3V, Multiple TA, Bipolar FSR Mode. FIGURE 2-17: VSENSE Offset Histogram, Bipolar FSR/2 Mode, n = 10,000 Total Samples, 8x Average. FIGURE 2-18: VBUS Offset Histogram, Bipolar FSR/2 Mode, n = 10,000 Total Samples, 8x Average. FIGURE 2-19: VBUS Offset vs. TA, VDD = 3.3V, Bipolar FSR Mode. FIGURE 2-20: VSENSE DC Offset vs. TA, VBUS = 10.5V, Bipolar FSR Mode. FIGURE 2-21: IDD at ƒS = 1,024 sps vs. TA, Multiple VDD. FIGURE 2-22: IDD in Slow Mode vs. TA, Multiple VDD. FIGURE 2-23: IDD at ƒS = 8,192 sps vs. TA, Multiple VDD. FIGURE 2-24: IDD vs. TA, Multiple VDD, Multiple ƒS. FIGURE 2-25: IDD in Sleep Mode vs. TA, Multiple VDD. FIGURE 2-26: IDD in Power-down Mode vs. TA, Multiple VDD. FIGURE 2-27: ISENSE- vs. TA, Common Mode, Multiple VBUS. FIGURE 2-28: ISENSE+ vs. TA, Common Mode, Multiple VBUS. FIGURE 2-29: VSENSE- Leakage vs. TA, Common Mode, Multiple VBUS. FIGURE 2-30: VSENSE+ Leakage vs. TA, Common Mode, Multiple VBUS. FIGURE 2-31: IOL vs. VOL, TA = 25°C, VDD = 5.5V. FIGURE 2-32: ƒS Error across TA = -40°C to +125°C, n = 30,852 Total Samples. FIGURE 2-33: ƒS Error across TA = 30°C, n = 10,308 Total Samples. FIGURE 2-34: POR Threshold vs. TA. 3.0 Pin Descriptions TABLE 3-1: PAC1811 Pin Descriptions 3.1 Sense Voltage Pins (VSENSE+ and VSENSE–) 3.2 Ground Pin (GND) 3.3 Positive Power Supply Voltage Pin (VDD) 3.4 SMBus Data (SMBDAT) Pin (SDA) 3.5 SMBus Clock (SMBCLK) Pin (SCL) 3.6 A0 and A1 Multi-functional Pins 3.7 Power-down Pin (PWRDN) 3.8 Positive Bus Voltage Pin (VBUS+) 4.0 Device Description 4.1 Definitions 4.2 Detailed Description 4.3 Voltage Measurement EQUATION 4-1 4.4 Current Measurement 4.5 Selecting RSHUNT Values EQUATION 4-2 EQUATION 4-3 EQUATION 4-4 4.6 FSR/2 Modes TABLE 4-1: FSR/2 – VBUS TABLE 4-2: FSR/2 – VSENSE 4.7 ADC Measurements, Offset and Averaging 4.8 Power and Energy EQUATION 4-5 EQUATION 4-6 EQUATION 4-7 EQUATION 4-8 4.9 Conversion Cycles 4.10 Alert Functionality 5.0 SMBus and I2C Communications Protocols FIGURE 5-1: SMBus Timing Diagram. 5.1 Addressing and Control Bits TABLE 5-1: Address Select 5.2 SMBus Timeout 5.3 SMBus and I2C Compatibility 5.4 SMBus and I2C Standard Protocol TABLE 5-2: Protocol Packet 5.5 Auto-incrementing Pointer FIGURE 5-2: READ and WRITE Auto-Incrementing Loops. 5.6 SMBus/I2C Commands TABLE 5-3: Refresh and Refresh_V Commands TABLE 5-4: General Call Response TABLE 5-5: Write Byte TABLE 5-6: Read Byte TABLE 5-7: Send Byte TABLE 5-8: Receive Byte TABLE 5-9: Block Write – I2C version TABLE 5-10: Block Read – I2C Version TABLE 5-11: Block Read – SMBus Version (Must set BYTE COUNT bit) 6.0 Register Description TABLE 6-1: PAC1811 Registers 6.1 Reading Data Bytes 6.2 Register Categories 6.3 Detailed Register Information Register 6-1: REFRESH (Address 00h) FIGURE 6-1: Host Read Period After a Refresh Command. Register 6-2: CONTROL (Address 01h) Register 6-3: ACC_COUNT (Address 02h) Register 6-4: VACC (Address 03h) Register 6-5: VBUS (Address 04h) Register 6-6: VSENSE (Address 05h) Register 6-7: VBUS_AVG (Address 06h) Register 6-8: VSENSE_AVG (Address 07h) Register 6-9: VPOWER (Address 08h) Register 6-10: VBUS_MIN (Address 09h) Register 6-11: VBUS_MAX (Address 0Ah) Register 6-12: VSENSE_MIN (Address 0Bh) Register 6-13: VSENSE_MAX (Address 0Ch) Register 6-14: VPOWER_MIN (Address 0Dh) Register 6-15: VPOWER_MAX (Address 0Eh) Register 6-16: CONTROL_LAT (Address 0Fh) Register 6-17: NEG_PWR_FSR_LAT (Address 10h) Register 6-18: ALERT_STATUS (Address 11h) Register 6-19: SMBUS_SETTINGS (Address 12h) Register 6-20: NEG_PWR_FSR (Address 13h) Register 6-21: REFRESH_G (Address 14h) Register 6-22: REFRESH_V (Address 15h) Register 6-23: SLOW (Address 16h) Register 6-24: CONTROL_ACT (Address 17h) Register 6-25: NEG_PWR_FSR_ACT (Address 18h) Register 6-26: SLOW_ALERT0 (Address 19h) Register 6-27: GPIO_ALERT1 (Address 1Ah) Register 6-28: ACC_FULL_LIMIT (Address 1BH) Register 6-29: OC_LIMIT (Address 1CH) Register 6-30: UC_LIMIT (Address 1DH) Register 6-31: OP_WARNING_LIMIT (Address 1EH) Register 6-32: OP_CRITICAL_LIMIT (Address 1FH) Register 6-33: OV_LIMIT (Address 20H) Register 6-34: UV_LIMIT (Address 21H) Register 6-35: STEP_LIMIT (Address 22H) Register 6-36: N-SAMPLES_LIMIT (Address 23h) Register 6-37: ALERT_ENABLE (Address 24h) Register 6-38: ACC_COUNT_PRESET (Address 25h) Register 6-39: VACC_PRESET (Address 26h) Register 6-40: PRODUCT_ID (Address FDh) Register 6-41: MANUFACTURER_ID (Address FEh) Register 6-42: REVISION_ID (Address FFh) 7.0 Packaging Information 7.1 Package Marking Information 7.2 Package Drawings Appendix A: Revision History Revision B (November 2025) Revision A (November 2025) Product Identification System Product Identification System (Automotive) Microchip Information Trademarks Legal Notice Microchip Devices Code Protection Feature