Electricity meter
Products and reference designs
Electricity meter
Overview
Our integrated circuits and reference designs help you create smarter electricity meters with advanced security and connectivity features to meet system design requirements. Whether for single or poly-phase meters, we have the right ingredients for accurate energy measurement and efficient communication.
Design requirements
- Accurate current and voltage measurement of current transformers, shunts or other sensors.
- High-speed, robust wireless and wired communications.
- Security against magnetic and mechanical tampering.
Smart electricity meter designs require:
Block diagram
Find products and reference designs for your system.
Polyphase electricity meter
Wired interface
Isolation (8)
Isolated RS-485 transceivers
Digital isolators
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ISO6731—General-purpose, triple-channel, 2/1, digital isolator
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ISO6742—General-purpose, quad-channel, 2/2 digital isolator
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ISO6721—General-purpose, dual-channel, 1/1 digital isolator
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ISO7721—Robust EMC, dual-channel, 1/1, reinforced digital isolator
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ISO6741—General-purpose, quad-channel, 3/1 digital isolator
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ISO7731—Robust EMC, triple-channel, 2/1, reinforced digital isolator
Interface (9)
RS-485 & RS-422 transceivers
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SN888C—Bus-Polarity Correcting RS-485 Transceiver with IEC-ESD Protection
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THVD1420—3.3-V to 5-V, 12-Mbps, RS-485 transceiver in small package option with ±12-kV IEC ESD prot
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THVD1452—3.3-V to 5-V RS-485 transceiver with ±18-kV IEC ESD protection
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THVD1424—RS-485 transceiver with slew-rate control, integrated switchable termination and duplex switching
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THVD1500—5-V RS-485 transceiver up to 500 kbps with ±8-kV IEC ESD protection
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THVD1450—3.3-V to 5-V RS-485 transceiver with ±18-kV IEC ESD protection
Ethernet PHYs
Passive and discrete (10)
ESD protection diodes
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ESDS552—12V two-channel bidirectional ESD and surge protection diode
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ESD601—18V, bidirectional ultra-low capacitance ESD protection diode for high-speed applications
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ESD451—0.5-pF, 5.5-V, 30-KV bidirectional ESD protection device in 0201 package
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ESD401—0.77-pF, ±5.5V, ±24-kV ESD protection diode in 0402 package
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TPD1E10B06—12-pF, ±5.5V, ±30-kV ESD protection diode in 0402 and SOD-523 package
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TPD1E05U06—0.5-pF, 5.5-V, ±12-kV ESD protection diode in 0402 package for High Speed Interfaces
TVS diodes
Amplifiers (6)
General-purpose op amps
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TLV9064—Quad, 5.5-V, 10-MHz, RRIO operational amplifier for cost-optimized applications
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TLV9101—Single, 16-V, 1.1-MHz, low-power operational amplifier
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LM358B—Dual, 36-V, 1.2-MHz, 3-mV offset voltage operational amplifier with -40°C to 85°C operation
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TLV9001—One-channel, 1-MHz rail-to-rail input and output 1.8-V to 5.5-V operational amplifier
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LM324B—Quad, 36V 1.2MHz 3mV offset voltage operational amplifier
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TLV9002—Dual, 5.5-V, 1-MHz, RRIO operational amplifier for cost-optimized applications
Power management (16)
Linear & low-dropout (LDO) regulators
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TLV772—300mA high-PSRR low-IQ adjustable LDO
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TLV761—1A 16V high-PSRR linear voltage regulator
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TLV767—Adjustable- and fixed-output, 1-A, 16-V, positive-voltage low-dropout (LDO) linear regulator
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TLV743P—300mA low-Iq low-dropout (LDO) voltage regulator with enable
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TLV709—150-mA 30-V low-dropout (LDO) linear regulator with 3.2-μA supply current
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TPS7A03—Nanopower-IQ 200nA 200mA low-dropout (LDO) voltage regulator with fast transient response
USB power switches & charging port controllers
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TPS25221—0.275-2.7A adj. ILIMIT, 2.5-5.5V, 70mΩ USB power switch, active-high, reverse blocking
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TPS2553—0.075-1.7A adj. ILIMIT, 2.5-6.5V, 85mΩ USB power switch, active-high, reverse blocking
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TPS2552D—0.075-1.7A adj. ILIMIT 2.5-6.5V 85mΩ USB power switch, active-low, reverse blocking, multip
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TPS2553D—0.075-1.7A adj. ILIMIT 2.5-6.5V 85mΩ USB power switch, active-high, reverse blocking, multi
eFuses & hot swap controllers
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TPS25961—2.7-V to 19-V 100-mΩ eFuse with overvoltage, overcurrent and short-circuit protection
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TPS2662—4.5-V to 60-V, 478mΩ, 0.025-0.88A eFuse with integrated input and output reverse polarity protection
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TPS25927—4.5-V to 18-V, 28mΩ, 1-5A eFuse with driver for external blocking FET
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TPS25921A—4.5-V to 18-V, 90mΩ, 0.4-1.6A eFuse with auto retry fault response
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TPS2596—2.7-V to 19-V, 85mΩ, 0.13-2A eFuse with selectable over voltage protection clamp in leaded package
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TPS2595—2.7-V to 18-V, 34mΩ, 0.5-4A eFuse with over voltage protection in small WSON package
Logic & voltage translation (1)
Direction-controlled voltage translators
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SN74AXC4T245—4-bit dual-supply bus transceiver
Microcontrollers (MCUs) & processors (6)
MSP430 microcontrollers
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MSP430F67791A—Polyphase metering SoC with 7 Sigma-Delta ADCs, LCD, real-time clock, 512KB Flash, 32KB RAM
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MSP430F67771A—Polyphase metering SoC with 7 Sigma-Delta ADCs, LCD, real-time clock, 256KB Flash, 32KB RAM
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MSP430FR4133—16 MHz MCU with 16KB FRAM, 2KB SRAM, 10-bit ADC, LCD, UART/SPI/I2C, IR logic, timer
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MSP430F6747—Polyphase metering SoC with 4 Sigma-Delta ADCs, LCD, real-time clock, AES, 256KB Flash, 32KB RAM
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MSP430F6749A—Polyphase metering SoC with 4 Sigma-Delta ADCs, LCD, real-time clock, AES, 512KB Flash, 32KB RAM
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MSP430F6779A—Polyphase metering SoC with 7 Sigma-Delta ADCs, LCD, real-time clock, AES, 512KB Flash, 32KB RAM
Technical documentation
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