Datasheet LTC2946 (Analog Devices)
| Fabricante | Analog Devices |
| Descripción | Wide Range I2C Power, Charge and Energy Monitor |
| Páginas / Página | 42 / 1 — FEATURES. DESCRIPTION. Rail-to-Rail Input Range: 0V to 100V. Wide Input … |
| Formato / tamaño de archivo | PDF / 474 Kb |
| Idioma del documento | Inglés |
FEATURES. DESCRIPTION. Rail-to-Rail Input Range: 0V to 100V. Wide Input Supply Range: 2.7V to 100V
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Versión de texto del documento
LTC2946 Wide Range I2C Power, Charge and Energy Monitor
FEATURES DESCRIPTION
n
Rail-to-Rail Input Range: 0V to 100V
The LTC®2946 is a rail-to-rail system monitor that measures n
Wide Input Supply Range: 2.7V to 100V
current, voltage, power, charge and energy. It features an n
Shunt Regulator for Supplies >100V
operating range of 2.7V to 100V and includes a shunt regu- n
Δ∑ ADC with Less Than ±0.4% Total
lator for supplies above 100V. The current measurement
Unadjusted Error
common mode range of 0V to 100V is independent of the n 12-Bit Resolution for Current and Voltages input supply. A 12-bit ADC measures load current, input n ±1% Accurate Power and Energy Measurements voltage and an auxiliary external voltage. Load current and n ±0.6% Accurate Current and Charge Measurements internally calculated power are integrated over an external n Additional ADC Input Monitors an External Voltage clock or crystal or internal oscillator time base for charge n Internal ±5% or External Time Bases and energy. An accurate time base allows the LTC2946 n Continuous Scan and Snapshot Modes to provide measurement accuracy of better than ±0.6% n Stores Minimum and Maximum Values for charge and ±1% for power and energy. Minimum and n Alerts When Limits Exceeded maximum values are stored and an overrange alert with n Split SDA Pin Eases Opto-Isolation programmable thresholds minimizes the need for software n Shutdown Mode with IQ < 40µA polling. Data is reported via a standard I2C interface. n Available in 4mm × 3mm DFN and 16-Lead The LTC2946 I2C interface includes separate data input MSOP Packages and output pins for use with standard or opto-isolated I2C connections. The LTC2946-1 has an inverted data output
APPLICATIONS
for use with inverting opto-isolator configurations. n Telecom Infrastructure L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and Hot Swap is a trademark of Linear Technology Corporation. All other trademarks are the n Industrial Equipment property of their respective owners. n General Purpose Energy Measurement
TYPICAL APPLICATION Wide Range Power, Charge and Energy Monitor with Onboard ADC and I2C ADC Total Unadjusted Error (ADIN)
0.02Ω V 0.10 IN TO 4V TO 100V LOAD SENSE+ SENSE– VDD GPIO3 ALERT 0.05 INTVCC SCL I2C 0.1µF INTERFACE ADR1 SDAI LTC2946 NINE I2C 0 ADR0 SDAO ADDRESSES MEASURED GND ADIN ADC TUE (%) VOLTAGE ACCUMULATION GPIO2 GPIO1 –0.05 ENABLE GENERAL PURPOSE CLKIN CLKOUT OUTPUT OPTIONAL –0.10 0 1024 2048 3072 4096 CRYSTAL TIMEBASE CODE 2946 TA01a 2946 TA01b 2946fa For more information www.linear.com/LTC2946 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Timing Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts
FEATURES DESCRIPTION
n
Rail-to-Rail Input Range: 0V to 100V
The LTC®2946 is a rail-to-rail system monitor that measures n
Wide Input Supply Range: 2.7V to 100V
current, voltage, power, charge and energy. It features an n
Shunt Regulator for Supplies >100V
operating range of 2.7V to 100V and includes a shunt regu- n
Δ∑ ADC with Less Than ±0.4% Total
lator for supplies above 100V. The current measurement
Unadjusted Error
common mode range of 0V to 100V is independent of the n 12-Bit Resolution for Current and Voltages input supply. A 12-bit ADC measures load current, input n ±1% Accurate Power and Energy Measurements voltage and an auxiliary external voltage. Load current and n ±0.6% Accurate Current and Charge Measurements internally calculated power are integrated over an external n Additional ADC Input Monitors an External Voltage clock or crystal or internal oscillator time base for charge n Internal ±5% or External Time Bases and energy. An accurate time base allows the LTC2946 n Continuous Scan and Snapshot Modes to provide measurement accuracy of better than ±0.6% n Stores Minimum and Maximum Values for charge and ±1% for power and energy. Minimum and n Alerts When Limits Exceeded maximum values are stored and an overrange alert with n Split SDA Pin Eases Opto-Isolation programmable thresholds minimizes the need for software n Shutdown Mode with IQ < 40µA polling. Data is reported via a standard I2C interface. n Available in 4mm × 3mm DFN and 16-Lead The LTC2946 I2C interface includes separate data input MSOP Packages and output pins for use with standard or opto-isolated I2C connections. The LTC2946-1 has an inverted data output
APPLICATIONS
for use with inverting opto-isolator configurations. n Telecom Infrastructure L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and Hot Swap is a trademark of Linear Technology Corporation. All other trademarks are the n Industrial Equipment property of their respective owners. n General Purpose Energy Measurement
TYPICAL APPLICATION Wide Range Power, Charge and Energy Monitor with Onboard ADC and I2C ADC Total Unadjusted Error (ADIN)
0.02Ω V 0.10 IN TO 4V TO 100V LOAD SENSE+ SENSE– VDD GPIO3 ALERT 0.05 INTVCC SCL I2C 0.1µF INTERFACE ADR1 SDAI LTC2946 NINE I2C 0 ADR0 SDAO ADDRESSES MEASURED GND ADIN ADC TUE (%) VOLTAGE ACCUMULATION GPIO2 GPIO1 –0.05 ENABLE GENERAL PURPOSE CLKIN CLKOUT OUTPUT OPTIONAL –0.10 0 1024 2048 3072 4096 CRYSTAL TIMEBASE CODE 2946 TA01a 2946 TA01b 2946fa For more information www.linear.com/LTC2946 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Timing Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts