ACHS-7195-500E

Data Sheet ACHS-719x Fully Integrated, Hall-Effect Based Linear Current Sensor IC with 3 kVRMS Isolation and a Low-Resistance Current Conductor Description The Broadcom® ACHS-719x (±10A to ±50A) fully integrated Hall-effect based isolated linear current sensors are designed for AC or DC current sensing in industrial, commercial, and communications systems. Inside each ACHS-719x IC is 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 that the differential Hall sensors convert into a proportional voltage. Device accuracy is optimized across the operating ambient temperature through the close proximity of the magnetic signal to the Hall sensors. Features            A precise, proportional voltage is provided by the low-offset, chopper-stabilized CMOS Hall IC, which is programmed for accuracy after packaging. The output of the device has a positive slope (>VOUT(Q)) when an increasing current flows through the primary copper conduction path (from pins 1 and 2 to pins 3 and 4), which is the path used for current sampling. The internal resistance of this conductive path is 0.7 mΩ typical, providing low power loss. The terminals of the conductive path are electrically isolated from the signal leads (pins 5 through 8). This performance is delivered in a compact, surface mountable, SO-8 package that meets worldwide regulatory safety standards.      Wide operating temperature: –40ºC to +110ºC Internal conductor resistance: 0.7 mΩ typ. Sensing current range: ± 10A ~ ± 50A Output sensitivity: 40 mV/A to 185 mV/A Output voltage proportional to AC or DC currents Ratiometric output from supply voltage Single supply operation: 5.0V Low-noise analog signal path Device bandwidth is set via the new FILTER pin – 80 kHz typ. bandwidth with 1-nF filter capacitor Factory-trimmed for accuracy Extremely stable output offset voltage Near-zero magnetic hysteresis Maximum output error of ±6.0% across operating TA >25 kV/µs common mode transient immunity Small footprint, low-profile SO-8 package Worldwide safety approval: UL/cUL, IEC/EN 62368-1 – Isolation voltage: 3 kVrms, 1 minute Applications       Low-power inverter current sensing eBikes Motor phase and rail current sensing Solar inverters Chargers and converters Switching power supplies CAUTION! Take normal static precautions in the handling and assembly of this component to prevent damage, degradation, or both, which may be induced by ESD. The components featured in this data sheet are not to be used in military or aerospace applications or environments. Broadcom ACHS-719x-DS102 October 9, 2019 Fully Integrated, Hall-Effect Based Linear Current Sensor IC with 3 kVRMS Isolation and a Low-Resistance Current Conductor ACHS-719x Data Sheet Part Number Current Range Sensitivity ACHS-7191 ± 10A 185 mV/A ACHS-7192 ± 20A 100 mV/A ACHS-7193 ± 30A 66 mV/A ACHS-7194 ± 40A 50 mV/A ACHS-7195 ± 50Aa 40 mV/A a. Due to the package dissipation power limitations, the input power of ACHS-7195 must be derated at –25.2 mW/°C above 85°C on a 4-oz copper PCB. Functional Diagram NOTE: The connection of a 1-µF bypass capacitor between pins 8 and 5 is recommended. Pin Description Pin Pin Name 1 IP+ 2 IP+ 3 IP- 4 IP- Description Pin Pin Name Description Terminals for current being sampled; fused internally 8 VDD Supply voltage relative to GND 7 VOUT Output voltage Terminals for current being sampled; fused internally 6 FILTER 5 GND Filter pin to set bandwidth Output side ground Typical Application Circuit A typical application circuit of each ACHS-719x will have a 1-µF bypass capacitor and a filter capacitor as additional external components. The input side pin 1 and pin 2 are shorted together, and pin 3 and pin 4 are shorted together. The output voltage is directly measured from the VOUT pin. Broadcom ACHS-719x-DS102 2 Fully Integrated, Hall-Effect Based Linear Current Sensor IC with 3 kVRMS Isolation and a Low-Resistance Current Conductor ACHS-719x Data Sheet Ordering Information Option Part Number ACHS-7191 ACHS-7192 ACHS-7193 ACHS-7194 ACHS-7195 Current Rating (RoHS) Compliant Package Surface Mount ± 10A -000E SO-8 X ± 20A ± 30A ± 40A ± 50A -500E X -000E X -500E X -000E X -500E X -000E X -500E X -000E X -500E X Tape & Reel X X X X X UL 3 kVRMS 1 min. Rating Quantity X 100 per tube X 1500 per reel X 100 per tube X 1500 per reel X 100 per tube X 1500 per reel X 100 per tube X 1500 per reel X 100 per tube X 1500 per reel To form an order entry, choose a part number from the Part Number column and combine with the desired option from the Option column. Example 1: Select ACHS-7195-500E to order the product with ±50A, Surface Mount type in Tape-and-Reel packaging and RoHS compliance. Contact your Broadcom sales representative or authorized distributor for information. Option data sheets are available. Contact your Broadcom sales representative or authorized distributor for information. Broadcom ACHS-719x-DS102 3 Fully Integrated, Hall-Effect Based Linear Current Sensor IC with 3 kVRMS Isolation and a Low-Resistance Current Conductor ACHS-719x Data Sheet Package Outline Drawing ACHS-719x SO-8 Package PART NUMBER RoHS COMPLIANCE INDICATOR DATECODE LOT ID NOTE: 1. Dimensions are in millimeters (inches). 2. Lead coplanarity = 0.100 mm (0.004 in.) maximum. 3. Floating lead protrusion = 0.254 mm (0.010 in.) maximum. 4. Mold flash on each side = 0.127 mm (0.005 in.) maximum. Recommended Pb-Free IR Profile Recommended reflow condition as per JEDEC Standard, J-STD-020 (latest revision). Non-halide flux should be used. Broadcom ACHS-719x-DS102 4 Fully Integrated, Hall-Effect Based Linear Current Sensor IC with 3 kVRMS Isolation and a Low-Resistance Current Conductor ACHS-719x Data Sheet Regulatory Information The ACHS-719x ICs are approved by the following organizations. UL/cUL UL 1577, component recognition program up to VISO = 3000 VRMS. Approved under IEC/EN 62368-1; Certified under TUV Rheinland (former IEC 60950-1). Insulation and Safety Related Specifications Parameter Symbol Value Units Minimum External Air Gap (External Clearance) L(101) 4.0 mm Measured from input terminals to output terminals, shortest distance through air. Minimum External Tracking (External Creepage) L(102) 4.0 mm Measured from input terminals to output terminals, shortest distance path along the body. Minimum Internal Plastic Gap (Internal Clearance) — 0.05 mm Through insulation distance, conductor to conductor, usually the direct distance between the primary input conductor and the detector IC. Tracking Resistance (Comparative Tracking Index) CTI >175 V DIN IEC 112/VDE 0303 Part 1. — IIIa — Material Group (DIN VDE 0110, 1/89, Table 1). Isolation Group Conditions Absolute Maximum Rating Parameter Symbol Min. Max. Units Storage Temperature TS –55 +125 °C — Ambient Operating Temperature TA –40 +110 °C — Junction Temperature TJ(max) — +150 °C — Primary Conductor Lead Temperature TL(MAX) — +150 °C Pins 1, 2, 3, or 4 Supply Voltage VDD –0.5 8.0 V — Output Voltage VOUT –0.5 VDD + 0.5 V — IOUT(source) — 10 mA TA = 25°C IOUT(sink) — 10 mA TA = 25°C IP — 100 A PIN — 1750 mW — POUT — 90 mW — Output Current Source Output Current Sink Overcurrent Transient Tolerance Input Power Dissipation a Output Power Dissipation Test Conditions 1 pulse, 100 ms; TA = 25°C a. Absolute maximum input power dissipation is only valid if a 4-oz copper PCB is used. This power is valid up to 85°C ambient temperature. For >85°C ambient, a derating factor of –25.2 mW/°C is required. Broadcom ACHS-719x-DS102 5 Fully Integrated, Hall-Effect Based Linear Current Sensor IC with 3 kVRMS Isolation and a Low-Resistance Current Conductor ACHS-719x Data Sheet Recommended Operating Conditions Parameter Symbol Min. Max. Units TA –40 +110 °C VDD 4.5 5.5 V Output Capacitance Load CLOAD — 10 nF Output Resistive Load RLOAD 4.7 — kΩ IP –10 +10 A ACHS-7192 –20 +20 A ACHS-7193 –30 +30 A ACHS-7194 –40 +40 A ACHS-7195a –50 +50 A Ambient Operating Temperature VDD Supply Voltage Input Current Range ACHS-7191 a. Due to the SO-8 package power dissipation limitations, the input peak current is valid up to 85°C ambient temperature only on a 4-oz copper PCB. For >85°C ambient, derating is required. For details, see footnote a at Absolute Maximum Rating. For the input power derating curve, see Primary Power Derating Curve for ACHS-7195. Primary Power Derating Curve for ACHS-7195 2 1.8 Pin(W) 1.75W 1.6 Maximum Primary Power 1.4 1.2 1.12W 1 0.8 0.6 0.4 0.2 TA (°C) 0 -40 NOTE: Broadcom -20 0 20 40 60 KƉĞƌĂƟng Ambient Temperature 80 85 100 110 Mounted on Broadcom’s evaluation board as shown in Figure 16 and Figure 17. ACHS-719x-DS102 6 Fully Integrated, Hall-Effect Based Linear Current Sensor IC with 3 kVRMS Isolation and a Low-Resistance Current Conductor ACHS-719x Data Sheet Common Electrical Specifications Unless otherwise noted, all minimum/maximum specifications are over-recommended operating conditions, CF = 1 nF. Typical values are at TA = +25°C, VDD = 5.0V, CF = 1 nF. Parameter Symbol Min. Typ. Max. Units IDD — 13 15 mA VDD = 5V, output open RPRIMARY — 0.7 — mΩ Zero Current Output Voltage VOUT(Q) — VDD / 2 — Input Filter Resistance RF(INT) — 1.6 Bandwidth BW — Rise Time tr — tPO CMTI Supply Current Primary Conductance Resistance Power-on Time Common Mode Transient Immunity Test Condition Figure Note 5, 6 — — — — V Bidirectional, IP = 0A 2 — — kΩ — — — 80 — kHz –3 dB — — 4 — µs — 10 — — 21 — µs — 8 — 25 — — — a kV/µs VCM = 1000V a. Common Mode Transient Immunity is tested by applying a fast rising/falling voltage pulse across pin 4 and GND (pin 5). The output glitch observed is less than 0.2V from the average output voltage for less than 1 µs. Electrical Specifications For ACHS-7191: Unless otherwise noted, all minimum and maximum specifications are over-recommended operating conditions, CF = 1 nF. Typical values are at TA = +25°C, VDD = 5.0V, CF = 1 nF. Parameter Symbol Min. Typ. Max. Units IP –10 — +10 A Sensitivity Sens — 185 — Sensitivity Error ESENS –5 ±3 +5 Sensitivity Slope Sens — 0.04 — — 0.01 — VOE –30 — +30 VOE — 0.03 — Optimized Accuracy Range Zero Current Output Error Zero Current Output Error Slope Test Conditions Figure Note 7 a 1 b 1 b mV/A/°C TA = –40°C to 25°C 1 b TA = 25°C to 110°C 1 b TA = 25°C 2 b — mV/°C TA = –40°C to 25°C 2 b 0.06 — TA = 25°C to 110°C 2 b — mV/A –10A ≤ IP ≤ +10A % mV TA = –40°C to 110°C, VDD = 5V Output Noise VN(RMS) — 7.8 — mV BW = 2 kHz 9 c Nonlinearity NL — 0.27 — % — 3 d ETOT –6 ±1.5 +6 % TA = –40°C to 110°C 4 e Sensitivity Error Lifetime Drift ESENS_DRIFT — ±2 — % — — — Total Output Error Lifetime Drift ETOT_DRIFT — ±2 — % — — — Total Output Error a. The device may be operated at higher primary current levels, IP, provided that the Maximum Junction Temperature, TJ(MAX), is not exceeded. b. See Definition of Electrical Characteristics. c. Output Noise is the noise level of ACHS-7191 expressed in root mean square (RMS) voltage. d. Nonlinearity is defined as half of the peak-to-peak output deviation from the best-fit line, expressed as a percentage of the full-scale output voltage. See Definition of Electrical Characteristics for the complete definition and formula. e. Total Output Error in percentage is the difference between the measured output voltage at maximum input current (IPMAX) and the ideal output voltage at IPMAX divided by the ideal output voltage at IPMAX. The Total Output Error's typical value is based on the total output error measured at the point of product release. Broadcom ACHS-719x-DS102 7 Fully Integrated, Hall-Effect Based Linear Current Sensor IC with 3 kVRMS Isolation and a Low-Resistance Current Conductor ACHS-719x Data Sheet For ACHS-7192: Unless otherwise noted, all minimum/maximum specifications are over-recommended operating conditions, CF = 1 nF. Typical values are at TA = +25°C, VDD = 5.0V, CF = 1 nF. Parameter Symbol Min. Typ. Max. Units IP –20 — +20 A Sensitivity Sens — 100 — Sensitivity Error ESENS –4.5 ±3 +4.5 Sensitivity Slope Sens — 0.01 — — 0.01 — % VOE –25 — +25 mV VOE — –0.01 — Optimized Accuracy Range Zero Current Output Error Zero Current Output Error Slope Test Conditions Figure Note 7 a 1 b 1 b 1 b TA = 25°C to 110°C 1 b TA = 25°C 2 b — mV/°C TA = –40°C to 25°C 2 b 0.02 — mV/°C TA = 25°C to 110°C 2 b — mV/A –20A ≤ IP ≤ +20A % TA = –40°C to 110°C, VDD = 5V mV/A/°C TA = –40°C to 25°C Output Noise VN(RMS) — 4.1 — mV BW = 2 kHz 9 c Nonlinearity NL — 0.18 — % — 3 d ETOT –5.5 ±1.5 +5.5 % TA = –40°C to 110°C 4 e Sensitivity Error Lifetime Drift ESENS_DRIFT — ±2 — % — — — Total Output Error Lifetime Drift ETOT_DRIFT — ±2 — % — — — Total Output Error a. The device may be operated at higher primary current levels, IP, provided that the Maximum Junction Temperature, TJ(MAX), is not exceeded. b. See Definition of Electrical Characteristics. c. Output Noise is the noise level of ACHS-7192 expressed in root mean square (RMS) voltage. d. Nonlinearity is defined as half of the peak-to-peak output deviation from the best-fit line, expressed as a percentage of the full-scale output voltage. See Definition of Electrical Characteristics for the complete definition and formula. e. Total Output Error in percentage is the difference between the measured output voltage at maximum input current (IPMAX) and the ideal output voltage at IPMAX divided by the ideal output voltage at IPMAX. The Total Output Error's typical value is based on the total output error measured at the point of product release. Broadcom ACHS-719x-DS102 8 Fully Integrated, Hall-Effect Based Linear Current Sensor IC with 3 kVRMS Isolation and a Low-Resistance Current Conductor ACHS-719x Data Sheet For ACHS-7193: Unless otherwise noted, all minimum/maximum specifications are over-recommended operating conditions, CF = 1 nF. Typical values are at TA = +25°C, VDD = 5.0V, CF = 1 nF. Parameter Symbol Min. Typ. Max. Units IP –30 — +30 A Sensitivity Sens — 66 — Sensitivity Error ESENS –4.5 ±3 +4.5 Sensitivity Slope Sens — 0.01 — — 0.01 — % VOE –20 — +20 mV VOE — 0.01 — Optimized Accuracy Range Zero Current Output Error Zero Current Output Error Slope Test Conditions Figure Note 7 a 1 b 1 b 1 b TA = 25°C to 110°C 1 b TA = 25°C 2 b — mV/°C TA = –40°C to 25°C 2 b 0.02 — mV/°C TA = 25°C to 110°C 2 b — mV/A –30A ≤ IP ≤ +30A % TA = –40°C to 110°C, VDD = 5V mV/A/°C TA = –40°C to 25°C Output Noise VN(RMS) — 2.7 — mV BW = 2 kHz 9 c Nonlinearity NL — 0.11 — % — 3 d ETOT –5.5 ±1.5 +5.5 % TA = –40°C to 110°C 4 e Sensitivity Error Lifetime Drift ESENS_DRIFT — ±2 — % — — — Total Output Error Lifetime Drift ETOT_DRIFT — ±2 — % — — — Total Output Error a. The device may be operated at higher primary current levels, IP, provided that the Maximum Junction Temperature, TJ(MAX), is not exceeded. b. See Definition of Electrical Characteristics. c. Output Noise is the noise level of ACHS-7193 expressed in root mean square (RMS) voltage. d. Nonlinearity is defined as half of the peak-to-peak output deviation from the best-fit line, expressed as a percentage of the full-scale output voltage. See Definition of Electrical Characteristics for the complete definition and formula. e. Total Output Error in percentage is the difference between the measured output voltage at maximum input current (IPMAX) and the ideal output voltage at IPMAX divided by the ideal output voltage at IPMAX. The Total Output Error's typical value is based on the total output error measured at the point of product release. Broadcom ACHS-719x-DS102 9 Fully Integrated, Hall-Effect Based Linear Current Sensor IC with 3 kVRMS Isolation and a Low-Resistance Current Conductor ACHS-719x Data Sheet For ACHS-7194: Unless otherwise noted, all minimum/maximum specifications are over-recommended operating conditions, CF = 1 nF. Typical values are at TA = +25°C, VDD = 5.0V, CF = 1 nF. Parameter Symbol Min. Typ. Max. Units IP –40 — +40 A Sensitivity Sens — 50 — Sensitivity Error ESENS –4.5 ±3 +4.5 Sensitivity Slope Sens — 0.01 — — 0.01 — % VOE –20 — +20 mV VOE — –0.01 — Optimized Accuracy Range Zero Current Output Error Zero Current Output Error Slope Test Conditions Figure Note 7 a 1 b 1 b 1 b TA = 25°C to 110°C 1 b TA = 25°C 2 b — mV/°C TA = –40°C to 25°C 2 b 0.02 — mV/°C TA = 25°C to 110°C 2 b — mV/A –40A ≤ IP ≤ 40A % TA = –40°C to 110°C, VDD = 5V mV/A/°C TA = –40°C to 25°C Output Noise VN(RMS) — 2 — mV BW = 2 kHz 9 c Nonlinearity NL — 0.1 — % — 3 d ETOT –5.5 ±1.5 +5.5 % TA = –40°C to 110°C 4 e Sensitivity Error Lifetime Drift ESENS_DRIFT — ±2 — % — — — Total Output Error Lifetime Drift ETOT_DRIFT — ±2 — % — — — Total Output Error a. The device may be operated at higher primary current levels, IP, provided that the Maximum Junction Temperature, (TJ(MAX), is not exceeded. b. See Definition of Electrical Characteristics. c. Output Noise is the noise level of ACHS-7194 expressed in root mean square (RMS) voltage. d. Nonlinearity is defined as half of the peak-to-peak output deviation from the best-fit line, expressed as a percentage of the full-scale output voltage. See Definition of Electrical Characteristics for the complete definition and formula. e. Total Output Error in percentage is the difference between the measured output voltage at maximum input current (IPMAX) and the ideal output voltage at IPMAX divided by the ideal output voltage at IPMAX. The Total Output Error's typical value is based on the total output error measured at the point of product release. Broadcom ACHS-719x-DS102 10 Fully Integrated, Hall-Effect Based Linear Current Sensor IC with 3 kVRMS Isolation and a Low-Resistance Current Conductor ACHS-719x Data Sheet For ACHS-7195: Unless otherwise noted, all minimum/maximum specifications are over-recommended operating conditions, CF = 1 nF. Typical values are at TA = +25°C, VDD = 5.0V, CF = 1 nF. Parameter Symbol Min. Typ. Max. Units IP –50 — +50 A Sensitivity Sens — 40 — Sensitivity Error ESENS –4.5 ±3 +4.5 Sensitivity Slope Sens — +0.01 — — 0 — % VOE –30 — +30 mV VOE — –0.01 — Optimized Accuracy Rangea Zero Current Output Error Zero Current Output Error Slope Test Conditions Figure Note 7 b 1 c 1 c 1 c TA = 25°C to 110°C 1 c TA = 25°C 2 c — mV/°C TA = –40°C to 25°C 2 c 0.01 — mV/°C TA = 25°C to 110°C 2 c — mV/A –50A ≤ IP ≤ 50A % TA = –40°C to 110°C, VDD = 5V mV/A/°C TA = –40°C to 25°C Output Noise VN(RMS) — 1.7 — mV BW = 2 kHz 9 d Nonlinearity NL — 0.08 — % — 3 e ETOT –5.5 ±1.5 +5.5 % TA = –40°C to 110°C 4 f Sensitivity Error Lifetime Drift ESENS_DRIFT — ±2 — % — — — Total Output Error Lifetime Drift ETOT_DRIFT — ±2 — % — — — Total Output Error a. Due to the SO-8 package power dissipation limitations, the input RMS or DC current of the 50A product must be derated above 85°C ambient at –25.2 mW/°C on a 4-oz copper PCB. b. The device may be operated at higher primary current levels, IP, provided that the Maximum Junction Temperature, TJ(MAX), is not exceeded. c. See Definition of Electrical Characteristics. d. Output Noise is the noise level of ACHS-7195 expressed in root mean square (RMS) voltage. e. Nonlinearity is defined as half of the peak-to-peak output deviation from the best-fit line, expressed as a percentage of the full-scale output voltage. See Definition of Electrical Characteristics for the complete definition and formula. f. Total Output Error in percentage is the difference between the measured output voltage at maximum input current (IPMAX) and the ideal output voltage at IPMAX divided by the ideal output voltage at IPMAX. The Total Output Error's typical value is based on the total output error measured at the point of product release. Package Characteristics Parameter Symbol Min. Typ. Max. Units Test Condition Input-Output Momentary Withstand Voltage VISO 3000 — — Resistance (Input-Output) RI-O — 1014 — Ω VI-O = 500 VDC c Capacitance (Input-Output) CI-O — 1.3 — pF f = 1 MHz c Junction-to-Ambient Thermal Resistance (Due to Primary Conductor) Rθ12 — 35 — °C/W Based on the Broadcom evaluation board d Junction-to-Ambient Thermal Resistance (Due to IC) Rθ22 — 22 — °C/W Based on the Broadcom evaluation board d VRMS RH < 50%, t = 1 minute, TA = 25°C Note a, b, c a. In accordance with UL 1577, each device is proof-tested by applying an insulation test voltage ≤ 3600 VRMS for 1 second. b. The Input-Output Momentary Withstand Voltage is a dielectric voltage rating that should not be interpreted as an input-output continuous voltage rating. c. This is a two-terminal measurement: pins 1 through 4 are shorted together, and pins 5 through 8 are shorted together. d. The Broadcom evaluation board has 650 mm2 (total area including the top and bottom copper minus the mounting holes) of 4-oz copper connected to pins 1 and 2 and pins 3 and 4. See Thermal Consideration for additional information on thermal characterization. Broadcom ACHS-719x-DS102 11 Fully Integrated, Hall-Effect Based Linear Current Sensor IC with 3 kVRMS Isolation and a Low-Resistance Current Conductor ACHS-719x Data Sheet Typical Performance Plots All typical plots are based on TA = 25°C, VDD = 5V, CF = 1 nF, unless otherwise stated. Figure 1: Sensitivity vs. Temperature Figure 2: Zero Current Output Voltage vs. Temperature 2.515 Zero Current Output Voltage VOUT(Q) - V 200 SensiƟvity (Sens) - mV/A 180 ACHS-7191 ACHS-7192 ACHS-7193 ACHS-7194 ACHS-7195 160 140 120 100 80 60 40 2.505 2.500 2.495 2.490 2.485 20 -40 -20 0 20 40 60 Temperature (TA) - 80 100 0.30 0.28 0.26 0.24 0.22 0.20 0.18 0.16 0.14 0.12 0.10 0.08 0.06 0.04 0.02 0.00 -40 120 -20 0 20 40 60 80 100 120 Temperature (TA) - oC oC Figure 3: Nonlinearity vs. Temperature Figure 4: Total Output Error @ IP(MAX) vs. Temperature 6 ACHS-7191 ACHS-7192 ACHS-7193 ACHS-7194 ACHS-7195 4 ACHS-7191 ACHS-7192 ACHS-7193 ACHS-7194 ACHS-7195 Total Output Error - % Nonlinearity (NL) - % ACHS-7191 ACHS-7192 ACHS-7193 ACHS-7194 ACHS-7195 2.510 2 0 -2 -4 -6 -40 -20 0 20 40 60 Temperature (TA) - oC Broadcom 80 100 120 -40 -20 0 20 40 60 80 100 120 Temperature (TA) - oC ACHS-719x-DS102 12 Fully Integrated, Hall-Effect Based Linear Current Sensor IC with 3 kVRMS Isolation and a Low-Resistance Current Conductor ACHS-719x Data Sheet Figure 5: Supply Current vs. Temperature Figure 6: Supply Current vs. Supply Voltage Figure 7: Output Voltage vs. Sensed Current Figure 8: Power-On Time vs. External Filter 5.0 Output Voltage (VOUT) - V 4.5 4.0 3.5 3.0 2.5 2.0 ACHS-7191 ACHS-7192 ACHS-7193 ACHS-7194 ACHS-7195 1.5 1.0 0.5 0.0 -50 -40 -30 -20 -10 0 10 20 30 40 50 Input Current (Ip), A Figure 9: Noise vs. External Filter Figure 10: Rise Time vs. External Filter Output Noise (VNRMS) - mV 10 1 ACHS-7191 ACHS-7192 ACHS-7193 ACHS-7194 ACHS-7195 0.1 0.01 0.1 1 10 100 External Filter Capacitance (CF) - nF Broadcom ACHS-719x-DS102 13 ACHS-719x Data Sheet Definition of Electrical Characteristics Fully Integrated, Hall-Effect Based Linear Current Sensor IC with 3 kVRMS Isolation and a Low-Resistance Current Conductor Figure 11: Nonlinearity Calculation The ACHS-719x product series is a Hall-effect current sensor that sends an analog voltage proportional to the magnetic field intensity caused by the current flowing through the input primary conductor. Without a magnetic field, the output voltage is half of the supply voltage. It can detect both DC and AC current. Ratiometric Output The output voltage of the ACHS-719x series is ratiometric or proportional to the supply voltage. The sensitivity (Sens) of the device and the quiescent output voltage change when there is a change in the supply voltage (VDD). For example, for ACHS-7195 when the VDD is increased by +10% from 5V to 5.5V, the quiescent output voltage will change from 2.5V to 2.75V and the sensitivity will also change from 40 mV/A to 44 mV/A. Sensitivity The output sensitivity (Sens) is the ratio of the output voltage (VOUT) over the input current (IP) flowing through the primary conductor. It is expressed in mV/A. When an applied current flows through the input primary conductor, it generates a magnetic field that the Hall IC converts into a voltage. The proportional voltage is provided by the Hall IC, which is programmed at the factory for accuracy after packaging. The output voltage has a positive slope when an increasing current flows through pins 1 and 2 to pins 3 and 4. Sensitivity Error (ESENS) is the difference between the measured sensitivity and the ideal sensitivity expressed in percentage (%). Nonlinearity Nonlinearity is defined as half of the peak-to-peak output deviation from the best-fit line (BFL), expressed as a percentage of the full-scale output voltage. The full-scale output voltage is the product of the sensitivity (Sens) and full scale input current (IP). NL (%) = [(Max ' from BFL ± 0LQ'from BFL) / 2] × 100% Sens × )ull 6cale IP Broadcom Zero Current Output Voltage This is the output voltage of ACHS-719x when the primary current is zero. Zero current output voltage is half of the supply voltage (VDD/2). Zero Current Output Error This the voltage difference between the measured output voltage and the ideal output voltage (VDD/2) when there is no input current to the device. Total Output Error Total output error in percentage is the difference between the measured output voltage at maximum input current (IPMAX) and the ideal output voltage at IPMAX divided by the ideal output voltage at IPMAX. ETOT(%) =Measured VOUT @ IPMAX – Ideal VOUT@IPMAX × 100% Ideal VOUT@ IPMAX Power-On Time This is the time required for the internal circuitry of the device to be ready during the ramping of the supply voltage. Power-on time is defined as the finite time required for the output voltage to settle after the supply voltage reaches its recommended operating voltage. FILTER Pin The ACHS-719x has a FILTER pin for improving the signalto-noise ratio of the device. This eliminates the need for an external RC filter to the VOUT pin of the device, which can cause attenuation of the output signal. A ceramic capacitor, CF, can be connected between the FILTER pin to GND. ACHS-719x-DS102 14 ACHS-719x Data Sheet Application Information Fully Integrated, Hall-Effect Based Linear Current Sensor IC with 3 kVRMS Isolation and a Low-Resistance Current Conductor Figure 13: Recommended Trace Layout on the Input Pins PCB Layout The design of the printed circuit board (PCB) should follow good layout practices, such as keeping bypass capacitors close to the supply pin and the use of ground and power planes. A bypass capacitor must be connected between pins 5 and 8 of the device. The layout of the PCB can also affect the common mode transient immunity of the device due to stray capacitive coupling between the input and output circuits. To obtain maximum common mode transient immunity performance, the layout of the PCB should minimize any stray coupling by maintaining the maximum possible distance between the input and output sides of the circuit and ensuring that any ground or power plane on the PCB does not pass directly below or extend much wider than the body of the device. When the connection to the input pin covers only the vertical portion of the input pin, there is a sensitivity variation of about –0.6% versus the recommended PCB trace layout as shown in Figure 14. Figure 14: Vertical Portion Connection Land Pattern for 4-mm Board Creepage For applications that require PCB creepage of 4 mm between input and output sides, the land pattern in Figure 12 can be used. Figure 12: Land Pattern for 4-mm Creepage When the connection to the input pin covers only the horizontal portion of the input pin, there is a sensitivity variation of about +1.2% versus the recommended PCB trace layout (as shown in Figure 15). Figure 15: Horizontal Portion Connection Effect of PCB Layout on Sensitivity The trace layout on the input pins of ACHS-719x affects the sensitivity. Ensure that the PCB trace connection to the input pins covers the pins fully as shown in Figure 13. Broadcom ACHS-719x-DS102 15 ACHS-719x Data Sheet Thermal Consideration The evaluation board used in the thermal characterization is shown in Figure 16 and Figure 17. The inputs IP+ and IPare each connected to the input plane of 4-oz copper with at least 650 mm2 of total area (including top and bottom planes, minus the screw mounting holes). The output side GND is connected to a ground plane of 4-oz copper with 460 mm2 of total area (including top and bottom planes). The 4-oz copper enables the board to conduct higher current and achieve good thermal distribution in a limited space. Broadcom Fully Integrated, Hall-Effect Based Linear Current Sensor IC with 3 kVRMS Isolation and a Low-Resistance Current Conductor Figure 16: Broadcom Evaluation Board – Top Layer Figure 17: Broadcom Evaluation Board – Bottom Layer ACHS-719x-DS102 16 Broadcom, the pulse logo, Connecting everything, Avago Technologies, Avago, and the A logo are among the trademarks of Broadcom and/or its affiliates in the United States, certain other countries, and/or the EU. Copyright © 2019 Broadcom. All Rights Reserved. The term “Broadcom” refers to Broadcom Inc. and/or its subsidiaries. For more information, please visit www.broadcom.com. Broadcom reserves the right to make changes without further notice to any products or data herein to improve reliability, function, or design. Information furnished by Broadcom is believed to be accurate and reliable. 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