Isolated Current Sensor with Common Mode Field Rejection

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Fully Integrated Current Sensor IC Isolated Current Sensor with Common Mode Field Rejection Description The Senko Micro s SC810 provides economical and precise solutions for AC or DC current sensing

The device consists of a precise, low-offset, linear Hall circuit with a copper conduction path located near the surface of the die.

1 Fully Integrated Current Sensor IC Isolated Current Sensor with Common Mode Field Rejection Description The Senko Micro s SC810 provides economical and precise solutions for AC or DC current sensing in industrial, commercial, and communications systems. The device package allows for easy implementation by the customer. The device consists of a precise, low-offset, linear Hall circuit with a copper conduction path located near the surface of the die. Applied current flowing through this copper conduction path generates a magnetic field which the Hall IC converts into a proportional voltage. A precise, proportional voltage is provided by the lowoffset, chopper-stabilized Linear Hall IC, which is programmed for accuracy after packaging. The terminals of the conductive path (from pin1 and 2 to pin 3 and 4) are electrically isolated from the signal leads (pins 5 through 8). This allows the SC810 to be used in applications requiring electrical isolation without the use of opto-isolators or other costly isolation techniques. Package: 8-Lead SOP-SC Top View: Features Differential hall sensing rejects common mode fields Output voltage proportional to AC or DC currents Selected Reference voltage mode: VCC/2, 0.1 VCC Total output error =25 C, 3% for full temperature range. 4μs output rise time in response to step input current 1.2mΩ internal conductor resistance > 2 kv RMS minimum isolation voltage from pins 1-4 to pins 5-8 Nearly zero magnetic hysteresis Small footprint, low-profile SOP8-SC package Application Field Smart power meter Brushless DC motor commutation Load detection and management Switch mode power supplies Typical Application Support 0 ~ 50A, AC or DC Current Path: Note: uF bypass is MUST have to guarantee performance; uF bypass capacitor is optional for VCC; 3. The Zenner or TVS diode is optional for protection purpose. Senko micro 1

2 Order information Part Number Special Code Temp Range Packaging IP(A) SC810RFT-05B5 VCC=5V (mv/a) ±10 B5(0.5Vcc) 200 SC810RFT-10B5 ±11 B5(0.5Vcc) 185 SC810RFT-20B5 ±20 B5(0.5Vcc) 100 SC810RFT-20F5 *1 ±20 F5(2.5V) 100 SC810RFT-25B5 ±25 B5(0.5Vcc) 80 SC810RFT-30B5 R F T ±30 B5(0.5Vcc) 66 (-40~125 ) (3k Pieces/Reel) SC810RFT-50B5 ±50 B5(0.5Vcc) 40 SC810RFT-10U5 10 U5(0.1Vcc) 264 SC810RFT-20U5 20 U5(0.1Vcc) 200 SC810RFT-30U5 30 U5(0.1Vcc) 133 SC810RFT-40U5 40 U5(0.1Vcc) 100 *1 F5 Vout=2.5v with IP=0A, when power supply from 4.5v~5.5v Mark Description Senko micro 2

3 Functional Block Diagram VDD IP+ Power management MTP- ROM/RAM DSP inferface Sensor Bias To All Subcircuits TC1 Temp. sensor gain programmable offset prgorammable Reference I/O VREF Hall Hall TC2 MUX A D + Rail Rail Amp. VOUT IP- GND Pin Configuration (Code: R) Number Name Description 1 and 2 IP+ Terminals for current being sampled; fused internally 3 and 4 IP- Terminals for current being sampled; fused internally 5 GND Signal Ground terminal 6 VREF Reference voltage 7 VIOUT Analog output signal 8 VCC Device power supply terminal Senko micro 3

4 Absolute Maximum Ratings Absolute maximum ratings are limiting values to be applied individually, and beyond which the serviceability of the circuit may be impaired. Functional operability is not necessarily implied. Exposure to absolute maximum rating conditions for an extended period of time may affect device reliability. Characteristic Symbol Notes Rating Unit V CC Supply voltage 6.0 V V RCC Reverse Supply Voltage -0.1 V V IOUT Output voltage 6.0 V V RIOUT Reverse Output Voltage -0.1 V V ISO Dielectric Strength Test Voltage Pins 1-4 and 5-8; 50 Hz, 1 minute, TA=25 C 2400 V RMS V WVBI Working Voltage for Basic Isolation Maximum working voltage according to UL V peak I P Overcurrent Transient Tolerance 1 pulse, 100ms, 1% duty cycle 80 A I IOUT(Source) Output Current Source 20 ma I IOUT(Sink) Output Current Sink 20 ma T A Nominal Operating Ambient Temperature Range F -40~125 T J (max) Maximum Junction Temperature 165 T stg Storage Temperature 65~170 Common operating Characteristics Note: Over full range of T A=-40 C ~ 125 C, C Bypass=4.7uf,C Load=1.5nF, V CC=5V, unless otherwise specified. Parameter Symbol Test Condition Min Typ Max Units Supply Voltage V CC Operating V Supply Current I CC V CC = 5.0 V, output open 9 15 ma Output Capacitance Load C LOAD V IOUT to GND nf Output Resistive Load R LOAD V IOUT to GND 0.17 kω Primary Conductor Resistance R PRIMARY T A = 25 C mω Response Time t r I P = I P(max), T A = 25 C, C OUT = open S Frequency Bandwidth f 3 Db, T A=25 C; I P=10 A peak-to-peak 120 khz Nonlinearity E LIN Over full range of I P % Symmetry E SYM Over full range of I P 100 % Power-On Time T po Output reaches 90% of steady-state level, T J = 25 C, 20 A present us Magnetic Coupling TJ(max) is not exceeded 12 G/A Internal Filter Resistance R F(INT) 1.7 KΩ Power supply bypass capacitor C bypass Normal operating uf Vref capacitance load C REF pf Common Thermal Characteristics Parameter Symbol Test Condition Min Typ Max Units Operating Internal Lead Frame TA F range C Temperature Junction-to-Lead Thermal R θjl 5 C/W Resistance Junction-to-Ambient Thermal Resistance R θja 23 C/W Senko micro 4

5 X-05B Individual Performance Characteristics Optimized Accuracy Range I P A 0A V OQ IP=0A, T A=25 C 0.5Vcc V Sensitivity Sens Over full of T A=25 C 200 mv/a T A = -40~25 C 10 mv T A = 25~125 C 15 mv I P = 10 A, T A=25 C, output 0.5 % E TOT I P = 10 A, T A=-40 C ~ 125 C, output X-10B Individual Performance Characteristics Optimized Accuracy Range I P A 0A V OQ IP=0A, T A=25 C 0.5Vcc V Sensitivity Sens Over full of T A=25 C 185 mv/a T A = -40~25 C 10 mv T A = 25~125 C 15 mv I P = 10 A, T A=25 C, output 0.5 % E TOT I P = 10 A, T A=-40 C ~ 125 C, output X-20B Individual Performance Characteristics Optimized Accuracy Range I P A 0A V OQ IP=0A, TA=25 C 0.5Vcc V Sensitivity Sens Over full of TA=25 C 100 mv/a TA = -40~25 C 8 mv TA = 25~125 C 12 mv TA = -40~25 C 1 % TA = 25~125 C 1.2 % IP = 20 A, TA=25 C, output 0.5 % E TOT I P = 20 A, T A=-40 C ~ 125 C, output X-20F Individual Performance Characteristics Note: TJ(max) is not exceeded TA=-40 C ~ 125 C, CBypass=4.7uF, CLoad=1.5nF, VCC=4.5~5.5V, unless otherwise specified Optimized Accuracy Range I P A 0A V OQ IP=0A, TA=25 C 2.5 V Sensitivity Sens Over full of TA=25 C 100 mv/a TA = -40~25 C 10 mv TA = 25~125 C 15 mv TA = -40~25 C 1 % TA = 25~125 C 1.2 % IP = 20 A, TA=25 C, output 0.5 % E TOT I P = 20 A, T A=-40 C ~ 125 C, output Senko micro 5

6 X-25B Individual Performance Characteristics Optimized Accuracy Range I P A 0A V OQ IP=0A, T A=25 C 0.5Vcc V Sensitivity Sens Over full of T A=25 C 80 mv/a T A = -40~25 C 8 mv T A = 25~125 C 12 mv I P = 25 A, T A=25 C, output 0.5 % E TOT I P = 25 A, T A=-40 C ~ 125 C, output X-30B Individual Performance Characteristics Optimized Accuracy Range I P A 0A V OQ IP=0A, TA=25 C 0.5Vcc V Sensitivity Sens Over full of TA=25 C mv/a TA = -40~25 C 8 mv TA = 25~125 C 12 mv TA = -40~25 C 1 % TA = 25~125 C 1.2 % IP = 30 A, TA=25 C, output 0.5 % E TOT I P = 30 A, T A=-40 C ~ 125 C, output X-50B Individual Performance Characteristics Optimized Accuracy Range I P A 0A V OQ IP=0A, TA=25 C 0.5Vcc V Sensitivity Sens Over full of TA=25 C 40 mv/a TA = -40~25 C 8 mv TA = 25~125 C 12 mv TA = -40~25 C 1 % TA = 25~125 C 1.2 % IP = 50 A, TA=25 C, output 0.5 % E TOT I P = 50 A, T A=-40 C ~ 125 C, output X-10U Individual Performance Characteristics Optimized Accuracy Range I P 0 10 A 0A V OQ IP=0A, T A=25 C 0.1Vcc V Sensitivity Sens Over full of T A=25 C 264 mv/a T A = -40~25 C 10 mv T A = 25~125 C 15 mv I P = 10 A, T A=25 C, output 0.5 % E TOT I P = 10 A, T A=-40 C ~ 125 C, output Senko micro 6

7 X-20U Individual Performance Characteristics Optimized Accuracy Range I P 0 20 A 0A V OQ IP=0A, T A=25 C 0.1Vcc V Sensitivity Sens Over full of T A=25 C 200 mv/a Zero Current Output Slope ΔI OUT(Q) E TOT T A = -40~25 C 8 mv T A = 25~125 C 12 mv I P = 20 A, T A=25 C, output 0.5 % I P = 20 A, T A=-40 C ~ 125 C, output X-30U Individual Performance Characteristics Optimized Accuracy Range I P 0 30 A 0A V OQ IP=0A, T A=25 C 0.1Vcc V Sensitivity Sens Over full of T A=25 C 133 mv/a Zero Current Output Slope ΔI OUT(Q) E TOT T A = -40~25 C 8 mv T A = 25~125 C 12 mv I P = 30 A, T A=25 C, output 0.5 % I P = 30 A, T A=-40 C ~ 125 C, output X-40U Individual Performance Characteristics Optimized Accuracy Range I P 0 40 A 0A V OQ IP=0A, T A=25 C 0.1Vcc V Sensitivity Sens Over full of T A=25 C 100 mv/a Zero Current Output Slope ΔI OUT(Q) E TOT T A = -40~25 C 8 mv T A = 25~125 C 12 mv I P = 40 A, T A=25 C, output 0.5 % I P = 40 A, T A=-40 C ~ 125 C, output Senko micro 7

Offset (V) GAIN ERROR (V) SC810 Typical Performance Graphs Note: Over full range of T A=-40 C ~ 125 C, C

Linearity versus Ambient Temperature Figure 2. Current Consumption 0.030 0.020 0.020 0.010 0.010 0.000-0.

040-0.050-0.060 TEMP ( O C) TYP MIN MAX Figure 3.

8 Offset (V) GAIN ERROR (V) SC810 Typical Performance Graphs Note: Over full range of T A=-40 C ~ 125 C, C Bypass=4.7uf,C Load=1.5nF, V CC=5V, IP = 20A, unless otherwise specified. Figure 1. Linearity versus Ambient Temperature Figure 2. Current Consumption TEMP ( O C) TEMP ( O C) TYP MIN MAX Figure 3. Zero Current Output versus Ambient Temperature TYP MIN MAX Figure 4. Sensitivity Error versus Ambient Temperature Dynamic Performance Figure k 25A IP Frequency Response. Figure 6. < 5uS Response Time Senko micro 8

9 Package Information Note: Package is SOP8-SC, all dimensions are in millimeters. Senko micro 9

10 Important Notice SENKO micro-electronics co., Ltd. reserves the right to make, from time to time, such departures from the detail specifications as may be required to permit improvements in the performance, reliability, or manufacturability of its products. Before placing an order, the user is cautioned to verify that the information being relied upon is current. SENKO micro s products are not to be used in life support devices or systems, if a failure of an SENKO product can reasonably be expected to cause the failure of that life support device or system, or to affect the safety or effectiveness of that device or system. The information included herein is believed to be accurate and reliable. However, SENKO micro-electronics co., Ltd. assumes no responsibility for its use; nor for any infringement of patents or other rights of third parties which may result from its use. For the latest version of this document, visit our website: Revision Table Revision Change Page Author Date 1.0 Initial draft Jon Add unipolar IP detect mode Jon Add Common mode field rejection Jon Remove Vfault function Hao Mark description Hao Change format Hao Modify Temp Range Code in Order Information 2 Hao Modify Package Name, Mark Description, Pin Config 1, 2, 3 Hao Remove noise and total error at all temp range Hao Change Part Number 1 Hao Change rise time to response time 4 Jon Add order info. 2 Jon Senko micro 10

3.3V Power Supply Isolated Current Sensor with Common Mode Field Rejection

Fully Integrated Current Sensor IC 3.3V Power Supply Isolated Current Sensor with Common Mode Field Rejection Description The Senko Micro s provides economical and precise solutions for AC or DC current