SSP1837

Product Catgories

Short Description:

SSP1837 is a wide range of single-phase multi-function energy meter IC for single-phase socket, single-phase strip, Smart Appliance, with a low cost and high accuracy. SSP1837 integrates two high-accuracy Sigma-Delta ADC, voltage reference, power management and other analog circuit modules, and digital signal processing circuit to calculate active power, IRMS, VRMS etc. High frequency CF1 is provided for indicating IRMS/VRMS and high frequency CF for energy metering. SSP1837 can measure the single-phase active energy, active power, current and voltage RMS and other parameters to fully meet the needs of the socket, power strip, smart appliances and others.

Tags: electric energy measurement, Electric energy metering, Integrated circuit, Power Metering Chip

Product Detail

Features

High accuracy, less than ± 0.5% error over a dynamic range of 2500: 1
High stability of large signal, in the condition of signal 300mA, less than ±0.2% error in the output frequency fluctuation (CF)
High stability of small signal, in the condition of signal 50mA, less than ±0.3% error in the output frequency fluctuation (CF)
Current and voltage RMS, current measurement range (4mA ~ 30A) @1mohm
On-Chip anti-creep protection，Ensure noise power removal when there is no current
On-Chip power supply detector.Detect power down state，the chip goes into a reset state when the operating voltage drops below 2.7V
On-Chip voltage reference of 1.2V(typical)
On-chip oscillator as clock source，the clock about 2 MHZ
Single 3.3V supply, low power (8 mW typical)
Package：SOP8

Application：

Electric instrument
Intelligent socket, intelligent circuit breaker
Intelligent electric energy acquisition terminal

Parameter table

Absolute Maximum Ratings

Parameter	Symbol	Value	Unit
Power Voltage VDD	VDD	-0.3～+4	V
Analog Input Voltage to GND	IP～IN,VP	-4～+4	V
Digital Voltage to GND	SEL，CF,CF1	-0.3～VDD+0.3	V
Operating Temperature Range	T	-40～+85	℃
Storage Temperature Range	T	-40～+85	℃
Dissipation power of SOP8	Pd	10	mW

Note: Unless specified otherwise, Tamb= 25℃

Electrical Characteristics

Parameter	Symbol	Test Conditions	Measure Pin	Min	Typ	Max	Unit
Power Supply	VDD			3.0		3.6	V
Power Dissipation	Iop	VDD=3.3V			3		mA
Measure Error on Active Power (Absolute error)	WATTerr	a dynamic range 2500 to 1	CF		0.3	0.5	%
Measure fluctuation error on Active Power (Large signal)	Δ@6%Ib, Ib=5A	300mA@ 1mohm sample resistance， test 2-turn average	CF		0.1	0.2	%
Measure fluctuation error on Active Power (Small signal)	Δ@1%Ib，Ib=5A	50mA @ 1mohm sample resistance， test 1-turn	CF		0.15	0.3	%
Phase error when PF=0.8 Capacitive	PF08err	Current lead 37°（PF=0.8）				0.5	%
Phase error when PF=0.5Inductive	PF05err	Current lags 60°（PF=0.5）				0.5	%
AC PSRR	ACPSRR	IP/N=100mV				0.1	%
DC PSRR	DCPSRR	VP/N=100mV				0.1	%
Vrms measurement Error	VRMSerr		CF1		0.3		%
Irms measurement Error	IRMSerr	Ib	CF1		0.3		%
Analog Input Voltage(current)		Current differential input (peak)				50	mV
Analog Input Voltage(voltage)		voltage differential input (peak)				200	mV
Analog Input Impedance			VP/IP/IN		370		kΩ
SEL pull-down resistor		SEL（(pull-down）			80		kΩ
Input Signal Bandwidth		（-3dB）			3.5		kHz
On-chip voltage reference	Vref		VREF		1.218		V
Input High Voltage		VDD=3.3V±5%		2.6			V
Input Low Voltage		VDD=3.3V±5%				0.8	V
Output High Voltage		VDD=3.3V±5% IOH=5mA		VDD-0.5			V
Output Low Voltage		VDD=3.3V±5% IOL=5mA				0.5	V
Over-current threshold		Current sampling resistor 1mΩ			36		A
the frequency of over-current					7.17		KHz
response time of Over-current						200	ms

Note：Unless specified otherwise, Tamb= 25℃

All voltage values take GND terminal potential as reference point.

Test conditions VDD=3.3V, built-in 2M crystal oscillator.

Order Information

Part No	Package	Manner of Packing	Devices per bag/reel
SSP1837	SOP8	Reel	2500PCS

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Parameter table

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