MAX11068EVKIT+ Maxim Integrated Products, MAX11068EVKIT+ Datasheet
MAX11068EVKIT+
Specifications of MAX11068EVKIT+
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MAX11068EVKIT+ Summary of contents
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... High-Power Battery Backup Systems SuperCap Backup Systems Power Tools SMBus is a trademark of Intel Corp. _______________________________________________________________ Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. Data-Acquisition Interface S 12-Cell Battery Voltage Measurement with ...
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High-Voltage Sensor, Smart Data-Acquisition Interface ABSOLUTE MAXIMUM RATINGS HV, VDD U , GND U , DCIN to AGND ......................-0.3V to +80V HV to C12 ................................................................-0.3V to +6V C1–C12 to AGND ......................................-0. C(N+1) to C(N) .....................................................-0.3V to +9.0V ...
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High-Voltage Sensor, Smart ELECTRICAL CHARACTERISTICS (continued unless otherwise noted MIN MAX specified from -40NC to +105NC per the application circuit in Figure 4.) PARAMETER SYMBOL Differential Nonlinearity Channel Offset Error CELLV ...
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High-Voltage Sensor, Smart Data-Acquisition Interface ELECTRICAL CHARACTERISTICS (continued unless otherwise noted MIN MAX specified from -40NC to +105NC per the application circuit in Figure 4.) PARAMETER SYMBOL LINEAR REGULATOR +3.4V (VAA) ...
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High-Voltage Sensor, Smart ELECTRICAL CHARACTERISTICS (continued unless otherwise noted MIN MAX specified from -40NC to +105NC per the application circuit in Figure 4.) PARAMETER SYMBOL UPPER PORT SCL ...
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High-Voltage Sensor, Smart Data-Acquisition Interface ELECTRICAL CHARACTERISTICS (continued unless otherwise noted MIN MAX from -40NC to +105NC per the application circuit in Figure 4.) PARAMETER SLAVE PORT SDA Data Setup Time ...
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High-Voltage Sensor, Smart TOP VIEW DCIN VDD GND SCL SDA ALRM GPIO2 GPIO1 GPIO0 VDD GND SDA ALRM SHDN AUXIN2 PIN NAME DC Power-Supply Input. DCIN supplies the internal 3.4V regulator, which provides low-voltage power to the 1 DCIN ...
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High-Voltage Sensor, Smart Data-Acquisition Interface PIN NAME Upper Port Alarm Input. Overvoltage, undervoltage, over/undertemperature, cell mismatch, and 8 ALRM communication fault. The alarm signal is laddered. This signal is referenced to VDD U this signal to VDD 9 N.C. ...
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High-Voltage Sensor, Smart PIN NAME 30 C5 Cell 6 Minus Connection and Cell 5 Plus Connection 31 C6 Cell 7 Minus Connection and Cell 6 Plus Connection 32 C7 Cell 8 Minus Connection and Cell 7 Plus Connection 33 ...
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High-Voltage Sensor, Smart Data-Acquisition Interface CELL- HIGH- BALANCING VOLTAGE SWITCHES C12 C11 C10 AUXIN2 AUXIN1 AGND Figure 2. Analog Front-End Block Diagram 10 MUX INSTR AMP SELF- DIAGNOSTIC REF ...
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High-Voltage Sensor, Smart HV DCIN C12 9V C11 C10 MATCH OTHER INPUTS AGND NOTE: ALL DIODES ARE RATED FOR ESD CLAMPING CONDITIONS. THEY ARE NOT INTENDED TO ACCURATELY CLAMP DC ...
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High-Voltage Sensor, Smart Data-Acquisition Interface MODULE N+1 MODULE N+1 GND CELL STACK REFERENCE MODULE- (N+1) A KELVIN CONNECTION IS OPTIONAL FOR THE DCIN TAKEOFF IN HIGH-CURRENT APPLICATIONS. SEE THE NOISE TOLERANCE SECTION FOR DETAILS. MODULE+ (N) 22I FUSE 22I ...
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High-Voltage Sensor, Smart MODULE+ (N) CELL 8 CELL 7 CELL 6 CELL 5 CELL 4 CELL 3 CELL 2 CELL 1 MODULE- (N) Figure 5. Simplified Operating Circuit Diagram for an 8-Cell System Data-Acquisition Interface C12 ...
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High-Voltage Sensor, Smart Data-Acquisition Interface Detailed Description The MAX11068 has two auxiliary analog inputs that can be used to measure external resistance temperature detector (RTD) components. A negative temperature coefficient (NTC) RTD can be configured with the AUXIN1 or ...
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High-Voltage Sensor, Smart Battery Pack Architectures Battery packs are designed in a modular fashion to allow for multiple configurations, and fast and flexible assem- bly. This reduces cost by streamlining the build or repair process. The definition of a ...
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High-Voltage Sensor, Smart Data-Acquisition Interface MODULE MODULE N+1 CELL N+1 GND STACK REFERECNCE ALRM VDD U MODULE - (N+1) HV DCIN C12 C11 MODULE + (N) CELL 12 CELL 11 CELL 10 CELL 9 CELL 8 CELL 7 CELL ...
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High-Voltage Sensor, Smart MOTOR DRIVE+ COMM BUS MOTOR DRIVE- Figure 7. Electric Vehicle System PACK INVERTER+ INVERTER+ SWITCHES VEHICLE 12V PWR VEHICLE GND COMM BUS PACK INVERTER- SWITCHES Figure 8. Distributed Communication Battery Pack Data-Acquisition Interface CONN VEHICLE 12V ...
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High-Voltage Sensor, Smart Data-Acquisition Interface PACK INVERTER+ INVERTER+ SWITCHES VEHICLE 12V PWR VEHICLE GND CONTROLLER COMM BUS PACK INVERTER- SWITCHES Figure 9. SMBus-Laddered Battery Module Communication 18 SLAVE MONITOR STUB AND CONTROL SLAVE MONITOR AND CONTROL SLAVE MONITOR MASTER ...
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High-Voltage Sensor, Smart Battery-Management System (BMS) The BMS in an electric vehicle monitors cell voltage, pack current, and temperature. The BMS is composed of two components. The first is the master controller of the system that handles all communication ...
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High-Voltage Sensor, Smart Data-Acquisition Interface B12+ B11+ B10+ B9+ B8 16.97µ STROBE POINT 0 Figure 10. Cell-Scanning Timing The second stage in the channel-scanning process is the correction phase, where the front-end amplifier chops ...
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High-Voltage Sensor, Smart For every module in the battery pack, a 1Fs communi- cation delay is incurred while the scan command is for- warded up the SMBus ladder. Therefore, the difference in the scan completion time from the first ...
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High-Voltage Sensor, Smart Data-Acquisition Interface For the example with four modules and 12 cells per mod- ule, the total READALL bit count would be 120 bits per cell or 1440 bits for all 12 cells 200kHz I ...
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High-Voltage Sensor, Smart Alerts may be enabled on a per-cell basis. Local enable bits OVEN and UVEN are found in each cell’s data reg- ister (addresses 0x20 to 0x2B). These bits are mapped to the equivalent bits of the ...
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High-Voltage Sensor, Smart Data-Acquisition Interface Table 1. Cell-Balancing Circuit Parameter Variation CELL NAME MIN R 5 4.1 CELL I 308 BALANCE FILTER 3435 3dB t 0 N+1 (Note 1) ...
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High-Voltage Sensor, Smart Protection from Open-Cell Faults There are two methods of protecting the MAX11068 from damage due to an open circuit occurring in a series bat- tery stack external fuse placed in series with the internal ...
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High-Voltage Sensor, Smart Data-Acquisition Interface F1 R BIAS1 GATE D CLAMP F2 R BIAS2 Figure 17. External Cell-Balancing Circuit with a MOSFET Transistor Cell-Balancing Watchdog Timeout The MAX11068 implements a watchdog-style timeout feature for the ...
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High-Voltage Sensor, Smart for a hot-swap insertion of the battery cells. Once the POR threshold is reached, the internal RESET signal disables. A status bit, RSTSTAT in the STATUS register (address 0x02), is set when power is restored to ...
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High-Voltage Sensor, Smart Data-Acquisition Interface REGULATOR DISABLED VOLTAGE APPLIED TO DCIN CHECK SHDN CHECK DIE TEMPERATURE REGULATOR ENABLED CHECK VAA Figure 20. Power-Up Sequence Figure 21. Asynchronous Regulator Disable Events 28 SHDN ACTIVE DIE TEMP > +145°C VAA < ...
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High-Voltage Sensor, Smart Figure 22. Power-On-Reset Event Sequence HV VDD U CP+ GND U CP- DCIN SHDN VAA VDD L SCL L LOWER SDA INTERFACE ALRM L GND L AGND Figure 23. Detailed View of ...
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High-Voltage Sensor, Smart Data-Acquisition Interface DCIN Pin Application Circuit The DCIN pin is the input to the linear regulator. For maximum performance, it should be protected from any overvoltage conditions and also properly decoupled for peak transient current demands ...
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High-Voltage Sensor, Smart Care must be taken when selecting the AINCFG settling time value if the load on VDD is more than that speci- U fied by the typical application circuit diagrams. During the entire measurement cycle, the charge ...
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High-Voltage Sensor, Smart Data-Acquisition Interface Self-Diagnostics The MAX11068 incorporates the capability to check the health of its internal voltage reference and regula- tor output. The results are stored in the DIAG register. Conversions are enabled by setting the DIAGEN ...
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High-Voltage Sensor, Smart Noise Tolerance High-power batteries are often used in noisy environ- ments subject to high dv/dt supply noise and EMI noise. For example, the supply noise of a power inverter driving a high-horsepower motor produces a large ...
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High-Voltage Sensor, Smart Data-Acquisition Interface 2 Table Register Map REGISTER REGISTER ADDRESS NAME MANAGEMENT FUNCTIONS 0x00 VERSION 0x01 ADDRESS 0x02 STATUS 0x03 ALRTCELL 0x04 ALRTOVCELL 0x05 ALRTUVCELL 0x06 ALRTOVEN 0x07 ALRTUVEN 0x08 ADCCFG 0x09 CELLEN 0x0A ...
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High-Voltage Sensor, Smart 2 Table Register Map (continued) REGISTER REGISTER ADDRESS NAME SUMMARY AND ALERT FUNCTIONS 0x10 TOTAL 0x11 MAXCELL 0x12 MINCELL 0x18 OVTHRCLR 0x19 OVTHRSET 0x1A UVTHRSET 0x1B UVTHRCLR 0x1C MSMTCH 0x1E AINOT 0x1F AINUT ...
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High-Voltage Sensor, Smart Data-Acquisition Interface The MAX11068 contains 38 registers that control and report the operational status of the device (see Tables 5 through 34). Table 5. VERSION—IC Version Register Description (Address 0x00) BIT NAME D15 0 D14 0 ...
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High-Voltage Sensor, Smart Table 7. STATUS Register Description (Address 0x02) BIT NAME Reset Status: RSTSTAT = 1 after a power-reset event. Clear RSTSTAT to 0 after power-up and after a suc- D15 RSTSTAT cessful HELLOALL command to detect any ...
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High-Voltage Sensor, Smart Data-Acquisition Interface Table 7. STATUS Register Description (Address 0x02) (continued) BIT NAME Write ignored; read back AIN1 Fault: Indicates a fault condition (over- or undertemperature) ...
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High-Voltage Sensor, Smart Table 9. ALRTOVCELL—Per-Cell Overvoltage Alert Register Description (Address 0x04) BIT NAME D15 0 D14 0 D13 0 D12 0 D11 ALRTOV12 D10 ALRTOV11 D9 ALRTOV10 D8 ALRTOV9 D7 ALRTOV8 D6 ALRTOV7 D5 ALRTOV6 D4 ALRTOV5 D3 ...
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High-Voltage Sensor, Smart Data-Acquisition Interface Table 11. ALRTOVEN—Per-Cell Overvoltage Alert Enable Register Description (Address 0x06) BIT NAME D15 0 D14 0 D13 0 D12 0 D11 OVALRTEN12 D10 OVALRTEN11 D9 OVALRTEN10 D8 OVALRTEN9 D7 OVALRTEN8 D6 OVALRTEN7 D5 OVALRTEN6 ...
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High-Voltage Sensor, Smart Table 13. ADCCFG—ADC Configuration Register Description (Address 0x08) BIT NAME Start conversions scan set with 1 to initiate an ADC scan of the enabled cell channels. A new measurement scan is initiated as long as the ...
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High-Voltage Sensor, Smart Data-Acquisition Interface Table 14. CELLEN—Cell-Scan Enable Register Description (Address 0x09) BIT NAME D15 0 D14 0 Write ignored; read back 0. D13 0 D12 0 D11 CELL12EN D10 CELL11EN D9 CELL10EN D8 CELL9EN D7 CELL8EN Cell ...
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High-Voltage Sensor, Smart Table 16. BALCFG—Cell-Balancing Configuration Register Description (Address 0x0B) BIT NAME D15 0 D14 0 Write ignored; read back 0. D13 0 D12 0 D11 BAL12 D10 BAL11 D9 BAL10 D8 BAL9 Cell-Balancing/Discharge Switch Enable: D7 BAL8 ...
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High-Voltage Sensor, Smart Data-Acquisition Interface Table 17. ACQCFG—Acquisition Configuration Register Description (Address 0x0C) (continued) BIT NAME D5 AINCFG5 Auxiliary Analog Input-Acquisition Time Configuration: D4 AINCFG4 Custom acquisition settling time for AUXIN1/AUXIN2. The auxiliary analog channels acquisition settling time can ...
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High-Voltage Sensor, Smart Table 19. FMEA—Failure-Mode Effects Analysis Status and Control Register Description (Address 0x0E) BIT NAME Charge-Pump Undervoltage Alarm Enable Mask: D15 ALRMCPUV Set ALRMCPUV = 1 to force a charge-pump alert, ALRTCPUV, to generate an alarm. Set ...
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High-Voltage Sensor, Smart Data-Acquisition Interface Table 20. BROADCAST ADDRESS—Broadcast Address Register Description (Address 0x0F) BIT NAME D15 0 D14 0 D13 0 D12 0 D11 0 D10 BRDCST7 D6 BRDCST6 D5 BRDCST5 D4 ...
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High-Voltage Sensor, Smart Table 22. MAXCELL—Maximum Cell Reading Register Description (Address 0x11) BIT NAME D15 D11 D14 D10 D13 D9 D12 D8 D11 D7 D10 D6 12-bit ADC conversion result of the highest cell-voltage reading ...
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High-Voltage Sensor, Smart Data-Acquisition Interface Table 24. OVTHCLR—Overvoltage Clear Threshold Register Description (Address 0x18) BIT NAME D15 D11 D14 D10 D13 D9 D12 D8 12-bit limit for the reset threshold of overvoltage-alert detection. An alert that is issued when ...
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High-Voltage Sensor, Smart Table 26. UVTHRSET—Undervoltage Set Threshold Register Description (Address 0x1A) BIT NAME D15 D11 D14 D10 D13 D9 D12 D8 12-bit limit for the triggering threshold of undervoltage-alert detection. An alert for a given cell D11 D7 ...
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High-Voltage Sensor, Smart Data-Acquisition Interface Table 28. MSMTCH—Cell Mismatch Threshold Register Description (Address 0x1C) BIT NAME D15 D11 D14 D10 D13 D9 D12 D8 12-bit threshold limit for mismatch alert. If: D11 D7 MAXCELL - MINCELL > MSMTCH D10 ...
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High-Voltage Sensor, Smart Table 30. AINUT—Auxiliary Analog Input Undertemperature Threshold Register Description (Address 0x1F) PIN NAME D15 D11 D14 D10 D13 D9 12-bit threshold limit for an overvoltage alert on the AIN0 and AIN1 inputs. When the auxiliary D12 ...
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High-Voltage Sensor, Smart Data-Acquisition Interface Table 32. AIN1—Auxiliary Analog Input 1 Data Register Description (Address 0x40) PIN NAME D15 D11 D14 D10 D13 D9 D12 D8 D11 D7 D10 D6 12-bit ADC conversion result on the AUXIN1 channel. D9 ...
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High-Voltage Sensor, Smart Table 34. DIAG—Diagnostic Data Register Description (Address 0x44) PIN NAME D15 D11 D14 D10 D13 D9 12-bit ADC conversion result on the diagnostic data value. This diagnostic tests the toler- D12 D8 ance of the reference, ...
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High-Voltage Sensor, Smart Data-Acquisition Interface TO TOP OF STACK OR BOTTOM OF UPPER NEIGHBOR STACK GND U DCIN CP+ CP- GND GND AGND GND L 2 Figure 28 Physical Interface Block Diagram MASTER ...
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High-Voltage Sensor, Smart Each port contains a bidirectional SDA pin with managed internal pullup drivers. The SCL pin for the lower slave port is an input only, while the upper port master SCL pin has a 1kω pullup driver. ...
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High-Voltage Sensor, Smart Data-Acquisition Interface 2 Table 35 Command List FUNCTION This command sets the device address of the first part in the chain. All other parts in the chain are then assigned an automatically incremented HELLOALL ...
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High-Voltage Sensor, Smart 2 I Protocol Descriptions The following conventions are used in the description of the command protocols. Binary values are prefixed with the notation 0b, e.g., 0b11101000. Hexadecimal values are prefixed by the notation ...
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High-Voltage Sensor, Smart Data-Acquisition Interface HELLOALL Command The purpose of the HELLOALL command is to initialize the device stack and assign a unique device address to each MAX11068 in the SMBus ladder. It should be issued after any power ...
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High-Voltage Sensor, Smart SCL SDA SCL SDA LOW BYTE DEVICE 1 SCL SDA LOW BYTE DEVICE 2 SEQUENCE REPEATS. TWO BYTES ARE RETURNED FOR EVERY DEVICE IN THE STACK. SCL SDA ...
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High-Voltage Sensor, Smart Data-Acquisition Interface The ROLLCALL command is formatted like the READALL cycle format. First, the broadcast address is sent on the bus address byte with the R/Wb bit configured as a write. ...
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High-Voltage Sensor, Smart BUS LINK BUS FORWARDING DATA STREAM HOST TO IC1 S B[7:1]+ B[7:1]+W A IC1 TO IC2 IC2 TO IC3 S B[7:1]+W IC3 TO IC4 S B[7:1]+W IC4 TO ...
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High-Voltage Sensor, Smart Data-Acquisition Interface low data byte and then the upper data byte follow the command byte. Finally, the PEC is sent and a stop event ends the communication sequence. Figure 35 shows the communication ...
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High-Voltage Sensor, Smart WRITEDEVICE Command This command allows a register in a specific device within the SMBus ladder to be written similar to the WRITEALL command except that the I contains the fixed MSbs 0b10, followed by ...
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High-Voltage Sensor, Smart Data-Acquisition Interface READALL Command This command is used to retrieve register information from the stack of devices and it is the only way to read register values (except for the ADDRESS register, which is handled by ...
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High-Voltage Sensor, Smart SMBus ladder. Host processor efficiency is improved as a result. In addition, an ALRTPEC condition can be con- figured to generate an alarm on the alarm bus by setting the ALRMPEC bit. This alarm can be ...
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High-Voltage Sensor, Smart Data-Acquisition Interface SCL U SDA SCL L t HD-STA SDA L t BUF 2 Figure 41 Lower and Upper Port Timing Diagrams Port Timing Diagrams Figure ...
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High-Voltage Sensor, Smart Table 37. Data Check Byte Definition BIT NAME 7 ALRM Set if the device alarm condition, meaning the ALRML pin is high Unused, read Unused, read as ...
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High-Voltage Sensor, Smart Data-Acquisition Interface an 8-bit pipeline is shown for all parts of the circuit. The MSB of the remainder controls a mux to select which operation is performed on the left-shifted version of the remainder byte. Once ...
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High-Voltage Sensor, Smart BUS LINK BUS FORWARDING DATA STREAM HOST TO IC1 S Figure 43. Example WRITEALL Bit Stream Prior to PEC Transmission Power-On-Reset (POR) Event A VAA voltage below the POR threshold ...
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High-Voltage Sensor, Smart Data-Acquisition Interface The topmost device in an SMBus ladder stackup is responsible for generating the heartbeat signal when it is not in an active alarm state and after the RSTSTAT bit has been cleared. The last ...
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High-Voltage Sensor, Smart Table 38. Alert Bits with Descriptions and Corresponding Alarm Mask Bits ALERT STATUS BIT ALERT (REGISTER.BIT) DESCRIPTION Device reset STATUS.RSTSTAT occurred Overvoltage was STATUS.ALRTOV detected for at least one cell Undervoltage was STATUS.ALRTUV detected for at ...
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High-Voltage Sensor, Smart Data-Acquisition Interface Table 38. Alert Bits with Descriptions and Corresponding Alarm Mask Bits (continued) ALERT STATUS BIT ALERT (REGISTER.BIT) DESCRIPTION Auxiliary analog input 0 is outside STATUS.ALRTAIN1 one of the set thresholds Specifies whether each cell ...
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High-Voltage Sensor, Smart Shutdown Control The SHDN pin of the MAX11068 is connected in a man- ner that allows the shutdown/wakeup command to trickle up through the series of SMBus-laddered packs. The propagation time is on the order of ...
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High-Voltage Sensor, Smart Data-Acquisition Interface MAX11068 FULLY FUNCTIONAL SEND HELLOALL COMMAND NACK ACK? ACK SEND ROLLCALL COMMAND NACK ACK? ACK RECEIVE SLAVE DATA UNTIL CONSECUTIVE 0xFF BYTES, THEN NACK THE SLAVE HOST CALCULATES NUMBER OF MODULES Figure 47. Communication ...
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High-Voltage Sensor, Smart After the SMBus ladder modules are configured for com- munication, they should be configured for operation: 1) Perform a READALL to check device status: a) The RSTSTAT bit should be set in all devices to signify ...
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High-Voltage Sensor, Smart Data-Acquisition Interface MAX11068 COMMUNICATION INITIALIZED HOST STORES ORIGINAL BROADCAST SEND NEW BROADCAST ADDRESS WITH WRITEALL COMMAND TO ADDRESS 0x0F PROPER ACKs? SEND ROLLCALL COMMAND USING NEW ADDRESS PROPER ACKs? HOST CALCULATES NUMBER OF MODULES MODULE COUNT ...
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High-Voltage Sensor, Smart Failure Mode and Effects Analysis High-voltage battery-pack systems can be subjected to severe stresses during in-service fault conditions and could experience similar conditions during the manufacturing and assembly process. The MAX11068 is designed with high regard ...
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High-Voltage Sensor, Smart Data-Acquisition Interface Table 40. Failure-Mode Effects Analysis PIN NAME ACTION Open or disconnected 1 DCIN Short to pin 2 Open or disconnected 2 CP+ Short to pin 3 Open or disconnected 3 CP- Short to pin ...
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High-Voltage Sensor, Smart Table 40. Failure-Mode Effects Analysis (continued) PIN NAME ACTION Open or disconnected 11 GPIO1 Short to pin 12 Open or disconnected 12 GPIO0 Short to pin 13 Open or disconnected 13 VDD L Short to pin ...
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High-Voltage Sensor, Smart Data-Acquisition Interface Table 40. Failure-Mode Effects Analysis (continued) PIN NAME ACTION Open or disconnected 21 AUXIN1 Short to pin 22 Open or disconnected 22 REF Short to pin 23 Open or disconnected 23 AGND Short to ...
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High-Voltage Sensor, Smart Table 40. Failure-Mode Effects Analysis (continued) PIN NAME ACTION Open or disconnected 31 C6 Short to pin 32 Open or disconnected 32 C7 Short to pin 33 Open or disconnected 33 C8 Short to pin 34 ...
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