MAX11068GUU+T

MAX11068GUU+T Datasheet

MAX11068

Part	Datasheet
MAX11068GUU+T	MAX11068GUU+T (pdf)

Related Parts	Information
MAX11068GUU/V+	MAX11068GUU/V+
MAX11068GUU/V+T	MAX11068GUU/V+T
MAX11068GUU+	MAX11068GUU+

PDF Datasheet Preview
EVALUATION KIT AVAILABLE AVAILABLE MAX11068 12-Channel, High-Voltage Sensor, Smart Data-Acquisition Interface The MAX11068 is a programmable, highly integrated, high-voltage, 12-channel, battery-monitoring smart dataacquisition interface. It is optimized for use with batteries used in automotive systems, hybrid electric battery packs, electric cars, and any system that stacks long series strings of secondary metal batteries. This highly integrated battery sensor incorporates a simple state machine and a high-speed I2C bus for SMBusK-laddered serial communication. The MAX11068 analog front-end combines a 12-channel voltage measurement data-acquisition system with a highvoltage switch bank input. All measurements are done differentially across each cell. The full-scale measurement range is from 0 to 5.0V, with full stated accuracy guaranteed from 0.5V to 4.7V. The input mux/switch bank allows for differential measurement of each cell in a series stack. A high-speed, 12-bit successive approximation SAR A/D converter is used to digitize the cell voltages. All 12 cells can be measured in less than 107Fs. The MAX11068 uses a two-scan approach for collecting cell measurements and correcting them for errors. The first phase of the scan is the acquisition phase where the voltages of all 12 cells are acquired. The second phase is the error-cancellation phase where the ADC input is chopped to remove errors. This two-phase approach yields excellent accuracy over temperature and in the face of extreme noise in the system. The MAX11068 incorporates an internal oscillator that generates a 6.0MHz syFsutemnccltoicok nwiathlQD3.0i%agacrcaumracsy. The MAX11068 consumes less than 2.0mA from the power supply while in data-acquisition modes. This current is reduced to 75FA in standby mode and less than 1FA in shutdown mode. The device is packaged in a 38-pin, 9.7mm x 4.4mm x 1.0mm TSSOP package that is lead free and RoHS compliant and is designed to operate over the AEC-Q100 Grade 2, -40NC to +105NC temperature range. High-Voltage, Multicell Series-Stacked-Battery Systems Electric and Hybrid Electric Vehicle HEV Battery Packs Electric Bikes High-Power Battery Backup Systems Pin ConfSiguupreartCioanps aBpapcekaur patSeynsdteomf dsata sheet. FunctionPaolwDeiargTraomolsscontinued at end of data sheet. USCMSBPuiss ias taratdraedmeamrkaorkf MofaIxnimtelInCteogrpra. ted Products, Inc. S 12-Cell Battery Voltage Measurement with Temperature Monitoring Up to 12 Lithium-Ion Li+ , NiMH, or Super-Cap Cells Two Auxiliary Analog Inputs for Temperature Measurement S High-Accuracy I/Os Excellent Voltage-Measurement Accuracy 5mV Offset Voltage S Integrated 12-Channel Data-Acquisition System 12-Channel High-Voltage Mux to ADC Differential Cell-Voltage Measurement 12-Bit Precision, High-Speed SAR ADC 12 Cell Voltages Measured Within 107µs S Battery-Fault Detection Overvoltage and Undervoltage Digital Threshold Detection Cell Sense Line Open-Circuit Detection High/Low Temperature Digital Threshold Detection S 12 Integrated Cell-Equalization Switches Support Up to 200mA S Integrated 6V to 70V Input Linear Regulator S Integrated 25ppm/NC, 2.5V Precision Reference S Integrated Level-Shifted, I2C-Compliant SMBus Ladder Interface Supports Multiple Devices, Up to 31 SMBusLadder-Connected ICs Communications Protocol with Autoaddressing Fault-Tolerant Hardware Handshake and Data CRC Checking S Three General-Purpose Digital I/O Lines S Ultra-Low Power Dissipation Standby Mode Quiescent Current Drain 75µA Shutdown Mode Leakage Current 1µA S Operating Temperature Range from -40NC to +105NC AEC-Q100 Grade 2 S 38-Pin, Lead-Free/RoHS-Compliant TSSOP Package 9.7mm x 4.4mm Ordering Information PART MAX11068GUU+ MAX11068GUU/V+ TEMP RANGE PIN-PACKAGE -40NC to +105NC 38 TSSOP -40NC to +105NC 38 TSSOP +Denotes a lead Pb -free/RoHS-compliant package. /V Denotes an automotive qualified part. For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at MAX11068 12-Channel, High-Voltage Sensor, Smart Data-Acquisition Interface ABSOLUTE MAXIMUM RATINGS HV, VDDU, GNDU, DCIN to AGND.......................-0.3V to +80V HV to +6V to VHV + 0.3V C N+1 to +9.0V C0 to +4.0V SHDN to +60V VAA to +4.0V VDDL to +4.0V VDDU to +6.0V GNDU to +80V AGND to +0.3V AUXIN1, AUXIN2, THRM to AGND.......................-0.3V to +6.0V REF to -0.3V to VAA + 0.3V SCLL, SDAL, ALRML to GNDL................ -0.3V to VDDL + 0.3V SCLU, SDAU, ALRMU to GNDU..............-0.3V to VDDU + 0.3V CP+ to AGND......................... GNDU - 1.0V to VDDU + 1.0V CP- to -0.3V to GNDU + 0.3V GPIO0, GPIO1, GPIO2............................ -0.3V to VDDL + 0.3V ESD Rating HBM, Note AUXIN1, AUXIN2, REF, VAA, VDDU, GNDU, VDDL, GNDL, DCIN, SHDN, CP+, CP-, HV, SCLU, SDAU, ALRMU, SCLL, SDAL, ALRML, GPIO0, GPIO1, GPIO2 Maximum Continuous Current into Any Pin........................20mA ESD Diode Maximum Average Power Dissipation for Hot Plug Note W Continuous Power Multilayer Board..........................1269.8mW Continuous Power Single-Layer Board derating 15.9mW/NC above +70NC .......................1095.9mW Operating Temperature Range........................ .-40NC to +105NC Storage Temperature Range............................ -55NC to +150NC Junction Temperature Lead Temperature soldering, Soldering Temperature Note 1 Human Body Model to Specification MIL-STD-883 Method Note 2 Maximum average power dissipation for time period Peak current must never exceed 2A. is one time constant in µs of hot-plug current waveform through a given diode. For example, if is 330µs, the maximum average diode power dissipation is 0.793W. Actual average power dissipation must be calculated from current waveform for the application circuit. Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS TA = TMIN to TMAX, unless otherwise noted. VGNDU = VDCIN = 18V to +60V, typical values are at TA = +25NC, unless otherwise specified from -40NC to +105NC per the application circuit in Figure PARAMETER CONDITIONS MIN TYP MAX UNITS INPUTS Differential Cell Input-Voltage Range VCELLXIN Any 2 inputs CN+1 to CN for Note 2 Input C1 referred to AGND Cell Input Common-Mode Voltage Range Note 5 VCXIN Inputs C2 through C[TOP] referred to AGND C[TOP] referred to AGND C0 referred to AGND V GNDU Input-Leakage Current ICXIN ADC off C N to C N+1 = 5V ADC ON C N to C N+1 = 3V Q10.0 ADC Resolution Channel- Conversion Time ADCBITS tS LSB size is +1.22mV Highest enabled input Enabled inputs except highest Bits Fs/ Channel TA = +25NC Note 4 VCELL = 3.0V

PDF Datasheet Preview

EVALUATION KIT AVAILABLE

AVAILABLE

MAX11068
12-Channel, High-Voltage Sensor, Smart Data-Acquisition Interface

The MAX11068 is a programmable, highly integrated, high-voltage, 12-channel, battery-monitoring smart dataacquisition interface. It is optimized for use with batteries used in automotive systems, hybrid electric battery packs, electric cars, and any system that stacks long series strings of secondary metal batteries. This highly integrated battery sensor incorporates a simple state machine and a high-speed I2C bus for SMBusK-laddered serial communication.

The MAX11068 analog front-end combines a 12-channel voltage measurement data-acquisition system with a highvoltage switch bank input. All measurements are done differentially across each cell. The full-scale measurement range is from 0 to 5.0V, with full stated accuracy guaranteed from 0.5V to 4.7V. The input mux/switch bank allows for differential measurement of each cell in a series stack. A high-speed, 12-bit successive approximation SAR A/D converter is used to digitize the cell voltages. All 12 cells can be measured in less than 107Fs. The MAX11068 uses a two-scan approach for collecting cell measurements and correcting them for errors. The first phase of the scan is the acquisition phase where the voltages of all 12 cells are acquired. The second phase is the error-cancellation phase where the ADC input is chopped to remove errors. This two-phase approach yields excellent accuracy over temperature and in the face of extreme noise in the system. The MAX11068 incorporates an internal oscillator that
generates a 6.0MHz syFsutemnccltoicok nwiathlQD3.0i%agacrcaumracsy.

The MAX11068 consumes less than 2.0mA from the power supply while in data-acquisition modes. This current is reduced to 75FA in standby mode and less than 1FA in shutdown mode. The device is packaged in a 38-pin, 9.7mm x 4.4mm x 1.0mm TSSOP package that is lead free and RoHS compliant and is designed to operate over the AEC-Q100 Grade 2, -40NC to +105NC temperature range.

High-Voltage, Multicell Series-Stacked-Battery Systems

Electric and Hybrid Electric Vehicle HEV Battery Packs

Electric Bikes

High-Power Battery Backup Systems

Pin ConfSiguupreartCioanps aBpapcekaur patSeynsdteomf dsata sheet. FunctionPaolwDeiargTraomolsscontinued at end of data sheet. USCMSBPuiss ias taratdraedmeamrkaorkf MofaIxnimtelInCteogrpra. ted Products, Inc.

S 12-Cell Battery Voltage Measurement with Temperature Monitoring Up to 12 Lithium-Ion Li+ , NiMH, or Super-Cap Cells Two Auxiliary Analog Inputs for Temperature Measurement

S High-Accuracy I/Os Excellent Voltage-Measurement Accuracy 5mV Offset Voltage

S Integrated 12-Channel Data-Acquisition System 12-Channel High-Voltage Mux to ADC Differential Cell-Voltage Measurement 12-Bit Precision, High-Speed SAR ADC 12 Cell Voltages Measured Within 107µs

S Battery-Fault Detection Overvoltage and Undervoltage Digital Threshold Detection Cell Sense Line Open-Circuit Detection High/Low Temperature Digital Threshold Detection

S 12 Integrated Cell-Equalization Switches Support Up to 200mA

S Integrated 6V to 70V Input Linear Regulator

S Integrated 25ppm/NC, 2.5V Precision Reference

S Integrated Level-Shifted, I2C-Compliant SMBus Ladder Interface Supports Multiple Devices, Up to 31 SMBusLadder-Connected ICs Communications Protocol with Autoaddressing Fault-Tolerant Hardware Handshake and Data CRC Checking

S Three General-Purpose Digital I/O Lines

S Ultra-Low Power Dissipation Standby Mode Quiescent Current Drain 75µA Shutdown Mode Leakage Current 1µA

S Operating Temperature Range from -40NC to +105NC AEC-Q100 Grade 2

S 38-Pin, Lead-Free/RoHS-Compliant TSSOP Package 9.7mm x 4.4mm
Ordering Information

PART MAX11068GUU+ MAX11068GUU/V+

TEMP RANGE PIN-PACKAGE -40NC to +105NC 38 TSSOP -40NC to +105NC 38 TSSOP
+Denotes a lead Pb -free/RoHS-compliant package. /V Denotes an automotive qualified part.
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at

MAX11068
12-Channel, High-Voltage Sensor, Smart Data-Acquisition Interface

ABSOLUTE MAXIMUM RATINGS

HV, VDDU, GNDU, DCIN to AGND.......................-0.3V to +80V HV to +6V
to VHV + 0.3V C N+1 to +9.0V

C0 to +4.0V SHDN to +60V

VAA to +4.0V

VDDL to +4.0V VDDU to +6.0V GNDU to +80V AGND to +0.3V AUXIN1, AUXIN2, THRM to AGND.......................-0.3V to +6.0V

REF to -0.3V to VAA + 0.3V

SCLL, SDAL, ALRML to GNDL................ -0.3V to VDDL + 0.3V SCLU, SDAU, ALRMU to GNDU..............-0.3V to VDDU + 0.3V CP+ to AGND......................... GNDU - 1.0V to VDDU + 1.0V CP- to -0.3V to GNDU + 0.3V

GPIO0, GPIO1, GPIO2............................ -0.3V to VDDL + 0.3V ESD Rating HBM, Note

AUXIN1, AUXIN2, REF, VAA, VDDU, GNDU, VDDL, GNDL, DCIN, SHDN, CP+, CP-, HV, SCLU, SDAU, ALRMU, SCLL, SDAL, ALRML, GPIO0, GPIO1, GPIO2 Maximum Continuous Current into Any Pin........................20mA ESD Diode Maximum Average Power Dissipation for Hot Plug Note W Continuous Power Multilayer Board..........................1269.8mW Continuous Power Single-Layer Board derating 15.9mW/NC above +70NC .......................1095.9mW Operating Temperature Range........................ .-40NC to +105NC Storage Temperature Range............................ -55NC to +150NC Junction Temperature Lead Temperature soldering, Soldering Temperature

Note 1 Human Body Model to Specification MIL-STD-883 Method Note 2 Maximum average power dissipation for time period Peak current must never exceed 2A. is one time constant in µs of
hot-plug current waveform through a given diode. For example, if is 330µs, the maximum average diode power dissipation is 0.793W. Actual average power dissipation must be calculated from current waveform for the application circuit.

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

ELECTRICAL CHARACTERISTICS

TA = TMIN to TMAX, unless otherwise noted. VGNDU = VDCIN = 18V to +60V, typical values are at TA = +25NC, unless otherwise specified from -40NC to +105NC per the application circuit in Figure

PARAMETER

CONDITIONS

MIN TYP MAX UNITS

INPUTS

Differential Cell Input-Voltage Range

VCELLXIN

Any 2 inputs CN+1 to CN for Note 2

Input C1 referred to AGND

Cell Input Common-Mode Voltage Range Note 5

VCXIN

Inputs C2 through C[TOP] referred to AGND

C[TOP] referred to AGND C0 referred to AGND

V GNDU

Input-Leakage Current

ICXIN

ADC off C N to C N+1 = 5V ADC ON C N to C N+1 = 3V

Q10.0

ADC Resolution Channel- Conversion Time

ADCBITS tS

LSB size is +1.22mV Highest enabled input Enabled inputs except highest

Bits

Fs/ Channel

TA = +25NC Note 4 VCELL = 3.0V

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Datasheet ID: MAX11068GUU+T 647206