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 SC820 provides economical and precise solutions for AC or DC current sensing in

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 SC820 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 low-offset, chopper-stabilized Linear Hall IC, which is programmed for accuracy after packaging. The terminals of the conductive path (from pin1 through 4 to pin 5 through 8) are electrically isolated from the signal leads (pins 9 through 16). This allows the SC820 to be used in applications requiring electrical isolation without the use of opto-isolators or other costly isolation techniques. Package: 16-Lead SOP16-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, 1.65v,0.1Vcc Total output error =25 C, 3% for full temperature range. 4μs output rise time in response to step input current 0.8mΩ internal conductor resistance >4 kv RMS minimum isolation voltage from pins 1-8 to pins 9-16 Nearly zero magnetic hysteresis Small footprint, low-profile SOP16-SC package Application Field Smart power meter Brushless DC motor commutation Load detection and management Switch mode power supplies Typical Application Support 0 ~ 80A AC or DC Current Path: Note: uF bypass is MUST have to guarantee performance; uF bypass capacitor is optional for VCC; 3. The Zener or TVS diode is optional for protection purpose. Copyright 2017, Senko Micro Electronics co., Ltd Senko Micro 1

2 Order information Part Number Special Code Temp. Range Packaging IP (A) SC820RFT-06B5 Offset (V) VCC=5V (mv/a) 6 0.5Vcc 151 SC820RFT-15F SC820RFT-10B Vcc 85 SC820RFT-25B Vcc 80 SC820RFT-30B Vcc 66 SC820RFT-12B Vcc 56 SC820RFT-50B5 R Vcc 40 SC820RFT-35F SC820RFT-65B5 T Vcc SC820RFT-25B5 F(-40~125 ) (Reel, Vcc 28 SC820RFT-65F3 pieces/reel) SC820RFT-80F SC820NFT-10B Vcc 200 SC820NFT-12B Vcc 166 SC820NFT-20B Vcc 100 SC820NFT-30B5 N Vcc 66 SC820NFT-40B Vcc 50 SC820NFT-65B Vcc SC820NFT-30U Vcc 132 Mark Description Copyright 2017, Senko Micro Electronics co., Ltd 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 Pin of Pin of 820RFT 820NFT Pin Name Description 1,2,3,4 1,2,3,4 IP+ Terminals for current being sampled; fused internally 5,6,7,8 5,6,7,8 IP- Terminals for current being sampled; fused internally 9, 10,11 15 GND Signal Ground terminal VIOUT Analog output signal VCC Device power supply Note: Pin9,10,11 of SC820RFT internal connected to GND. Copyright 2017, Senko Micro Electronics co., Ltd 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. Symbol Characteristic 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 Agency type-tested for Vrms seconds per UL V WVRI Working Voltage for Basic Isolation Maximum working voltage according to UL V Peak I P Overcurrent Transient Tolerance 1 pulse, 100ms, 1% duty cycle 100 A I OUT(Source) Output Current Source 20 ma I OUT(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 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 12 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 % Power-On Time t PO Output reaches 90% of steady-state level, T J = 25 C, 20 A present 0.09 ms Magnetic Coupling T J(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 Common Thermal Characteristics Parameter Symbol Test Condition Min Typ Max Units Operating Internal Lead Frame Temperature TA F range C Junction-to-Lead Thermal Resistance R θjl 5 C/W Junction-to-Ambient Thermal Resistance R θja 23 C/W Copyright 2017, Senko Micro Electronics co., Ltd Senko Micro 4

5 820RFT-06B5 Individual Performance Characteristics Optimized Accuracy Range I P A Sensitivity Sens Over full of T A=25 C 151 mv/a I P = 6 A, T A=25 C, output 1 % E TOT I P = 6 A, T A=-40 C ~ 125 C, output 820RFT-15F3 Individual Performance Characteristics Optimized Accuracy Range I P A 0A Voq IP=0A, T A=25 C 1.65 V Sensitivity Sens Over full of T A=25 C 90 mv/a T A = -40~25 C 10 mv I P = 15 A, T A=25 C, output 1 % E TOT I P = 15 A, T A=-40 C ~ 125 C, output 820RFT-10B5 Individual Performance Characteristics Optimized Accuracy Range I P A Sensitivity Sens Over full of T A=25 C 85 mv/a I P = 10 A, T A=25 C, output 1 % E TOT I P = 10 A, T A=-40 C ~ 125 C, output 820RFT-25B5 Individual Performance Characteristics Optimized Accuracy Range I P A Sensitivity Sens Over full of T A=25 C 80 mv/a I P = 25 A, T A=25 C, output 1 % E TOT I P = 25 A, T A=-40 C ~ 125 C, output Copyright 2017, Senko Micro Electronics co., Ltd Senko Micro 5

6 820RFT-30B5 Individual Performance Characteristics Optimized Accuracy Range I P A Sensitivity Sens Over full of T A=25 C 66 mv/a I P = 30 A, T A=25 C, output 1 % E TOT I P = 30 A, T A=-40 C ~ 125 C, output 820RFT-12B5 Individual Performance Characteristics Optimized Accuracy Range I P A Sensitivity Sens Over full of T A=25 C 56 mv/a I P = 12.5 A, T A=25 C, output 1 % E TOT I P = 12.5 A, T A=-40 C ~ 125 C, output 820RFT-50B5 Individual Performance Characteristics Optimized Accuracy Range I P A Sensitivity Sens Over full of T A=25 C 40 mv/a T A = -40~25 C 15 mv T A = 25~125 C 10 mv I P = 50 A, T A=25 C, output 1 % E TOT I P = 50 A, T A=-40 C ~ 125 C, output 820RFT-35F3 Individual Performance Characteristics Optimized Accuracy Range I P A 0A Voq IP=0A, T A=25 C 1.65 V Sensitivity Sens Over full of T A=25 C 38.5 mv/a T A = -40~25 C 10 mv I P = 35 A, T A=25 C, output 1 % E TOT I P = 35 A, T A=-40 C ~ 125 C, output Copyright 2017, Senko Micro Electronics co., Ltd Senko Micro 6

7 820RFT-65B5 Individual Performance Characteristics Optimized Accuracy Range I P A Sensitivity Sens Over full of T A=25 C mv/a T A = -40~25 C 15 mv T A = 25~125 C 10 mv I P = 65 A, T A=25 C, output 1 % E TOT I P = 65 A, T A=-40 C ~ 125 C, output 820RFT-25B5 Individual Performance Characteristics Optimized Accuracy Range I P A Sensitivity Sens Over full of T A=25 C 28 mv/a T A = -40~25 C 15 mv T A = 25~125 C 10 mv I P = 25 A, T A=25 C, output 1 % E TOT I P = 25 A, T A=-40 C ~ 125 C, output 820RFT-65F3 Individual Performance Characteristics Optimized Accuracy Range I P A 0A Voq IP=0A, T A=25 C 1.65 V Sensitivity Sens Over full of T A=25 C 20.5 mv/a T A = -40~25 C 10 mv I P = 65 A, T A=25 C, output 1 % E TOT I P = 65 A, T A=-40 C ~ 125 C, output 820RFT-80F3 Individual Performance Characteristics Optimized Accuracy Range I P A 0A Voq IP=0A, T A=25 C 1.65 V Sensitivity Sens Over full of T A=25 C 16 mv/a T A = -40~25 C 10 mv I P = 80 A, T A=25 C, output 1 % E TOT I P = 80 A, T A=-40 C ~ 125 C, output Copyright 2017, Senko Micro Electronics co., Ltd Senko Micro 7

8 820NFT-10B5 Individual Performance Characteristics Optimized Accuracy Range I P A Sensitivity Sens Over full of T A=25 C 200 mv/a I P = 10 A, T A=25 C, output 1 % E TOT I P = 10 A, T A=-40 C ~ 125 C, output 820NFT-12B5 Individual Performance Characteristics Optimized Accuracy Range I P A Sensitivity Sens Over full of T A=25 C 166 mv/a I P = 12 A, T A=25 C, output 1 % E TOT I P = 12 A, T A=-40 C ~ 125 C, output 820NFT-20B5 Individual Performance Characteristics Optimized Accuracy Range I P A Sensitivity Sens Over full of T A=25 C 100 mv/a I P = 20 A, T A=25 C, output 1 % E TOT I P = 20 A, T A=-40 C ~ 125 C, output 820NFT-30B5 Individual Performance Characteristics Optimized Accuracy Range I P A Sensitivity Sens Over full of T A=25 C 66 mv/a I P = 30 A, T A=25 C, output 1 % E TOT I P = 30 A, T A=-40 C ~ 125 C, output Copyright 2017, Senko Micro Electronics co., Ltd Senko Micro 8

9 820NFT-40B5 Individual Performance Characteristics Optimized Accuracy Range I P A Sensitivity Sens Over full of T A=25 C 50 mv/a T A = -40~25 C 15 mv T A = 25~125 C 10 mv I P = 40 A, T A=25 C, output 1 % E TOT I P = 40 A, T A=-40 C ~ 125 C, output 820NFT-65B5 Individual Performance Characteristics Optimized Accuracy Range I P A Sensitivity Sens Over full of T A=25 C mv/a T A = -40~25 C 15 mv T A = 25~125 C 10 mv I P = 65 A, T A=25 C, output 1 % E TOT I P = 65 A, T A=-40 C ~ 125 C, output 820NFT-30U5 Individual Performance Characteristics Optimized Accuracy Range I P 0 30 A 0A Voq IP=0A, T A=25 C 0.1Vcc V Sensitivity Sens Over full of T A=25 C 132 mv/a T A = -40~25 C 10 mv T A = 25~125 C 12 mv I P = 30 A, T A=25 C, output 1 % E TOT I P = 30 A, T A=-40 C ~ 125 C, output Copyright 2017, Senko Micro Electronics co., Ltd Senko Micro 9

Offset (V) Gain Error (%) SC820 Typical Performance Graphs Note: Over full range of T A=-40 C ~ 125 C, C

Linearity versus Ambient Temperature Figure 2. Current Consumption 2.52 2.515 2.51 2.505 2.5 2.495 2.49 2.

00% -0.50% -40 25 85 105 125-1.00% -1.50% Temp ( O C) Figure 4.

10 Offset (V) Gain Error (%) SC820 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) Figure 3. Zero Current Output versus Ambient Temperature 1.00% 0.50% 0.00% -0.50% % -1.50% Temp ( O C) Figure 4. Sensitivity Error versus Ambient Temperature Figure k 25A IP Frequency response Figure 6. <5us Response time Copyright 2017, Senko Micro Electronics co., Ltd Senko Micro 10

12 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 Add figure, modify sensitivity Hao Add SC820N Hao Change Format Hao Change Part Number in Order Information 2 Hao Modify Max Current Tolerance 3 Hao Remove Noise Spec, Charts Hao Change Part Number 1 Hao Change Symbol define Jon Change part name and selection guide Jon Copyright 2017, Senko Micro Electronics co., Ltd Senko Micro 12

Isolated Current Sensor with Common Mode Field Rejection

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