User Guide for ROHM models including: BD87521G-LB, BD87521G-LB Transient Response Simulation, BD87521G-LB, Transient Response Simulation, Response Simulation, Simulation
ROHM Solution Simulator | 罗姆半导体集团(ROHM Semiconductor)
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DocumentDocumentUser's Guide ROHM Solution Simulator Excellent EMI Immunity High Output Drive Rail-to-Rail Input/Output CMOS Operational Amplifier BD87521G-LB Voltage Follower (Sine Wave Input) Transient Response simulation This circuit simulates the transient response to sine wave input with voltage follower configured Op-Amps. You can observe the output voltage and how faithfully the sine wave input voltage is reproduced. You can customize the parameters of the components shown in blue, such as VSOURCE, or peripheral components, and simulate the voltage follower with the desired operating condition. You can simulate the circuit in the published application note: Operational amplifier, Comparator (Tutorial). [JP] [EN] [CN] [KR] General Cautions Caution 1: The values from the simulation results are not guaranteed. Please use these results as a guide for your design. Caution 2: These model characteristics are specifically at Ta=25°C. Thus, the simulation result with temperature variances may significantly differ from the result with the one done at actual application board (actual measurement). Caution 3: Please refer to the Application note of Op-Amps for details of the technical information. Caution 4: The characteristics may change depending on the actual board design and ROHM strongly recommend to double check those characteristics with actual board where the chips will be mounted on. 1 Simulation Schematic Figure 1. Simulation Schematic 2 How to simulate The simulation settings, such as parameter sweep or convergence options, are configurable from the `Simulation Settings' shown in Figure 2, and Table 1 shows the default setup of the simulation. In case of simulation convergence issue, you can change advanced options to solve. The temperature is set to 27 °C in the default statement in `Manual Options'. You can modify it. Simulation Settings Simulate Table 1. Simulation settings default setup Parameters Default Simulation Type Time-Domain End Time 300 µs Advanced options Balanced Convergence Assist Manual Options .temp 27 Figure 2. Simulation Settings and execution Note Do not change Simulation Type - ©2024 ROHM Co., Ltd. 1/3 67UG009E Rev.001 Apr.2024 BD87521G-LB Voltage Follower (Sine Wave Input) Transient Response User's Guide 3 Simulation Conditions Table 2. List of the simulation condition parameters Instance Name Type Parameters Frequency Peak_voltage Initial_phase VSOURCE Voltage Source DC_offset DF AC_magnitude AC_phase VDD Voltage Source For Op-Amp Voltage_level AC_magnitude AC_phase (Note 1) Set it to the guaranteed operating range of the Op-Amps. Default Value 10k 0.5 0 2.5 0.0 0.0 0.0 5 0.0 0.0 Variable Range Min Max 10 10M VSS VDD free VSS VDD fixed fixed fixed 4(Note1) 15(Note1) fixed fixed Units Hz V ° V 1/s V ° V V ° 3.1 VSOURCE parameter setup Figure 3 shows how the VSOURCE parameters correspond to the VIN stimulus waveform. Initial_phase Peak_voltage DC_offset 1/Frequency VIN VO Figure 3. VSOURCE parameters and its waveform 4 Op-Amp model Table 3 shows the model pin function implemented. Note that the Op-Amp model is the behavioral model for its input/output characteristics, and neither protection circuits nor functions unrelated to the purpose are implemented. Table 3. Op-Amp model pins used for the simulation Pin Name Description +IN Non-inverting input -IN Inverting input VDD Positive power supply VSS Negative power supply / Ground OUT Output ©2024 ROHM Co., Ltd. 2/3 67UG009E Rev.001 Apr.2024 BD87521G-LB Voltage Follower (Sine Wave Input) Transient Response User's Guide 5 Peripheral Components 5.1 Bill of Material Table 4 shows the list of components used in the simulation schematic. Each of the capacitors has the parameters of equivalent circuit shown below. The default values of equivalent components are set to zero except for the ESR of C. You can modify the values of each component. Table 4. List of capacitors used in the simulation circuit Type Instance Name Default Value Resistor R1_1 RL1 0 10k Capacitor C1_1 CL1 0.1 10 Variable Range Min Max 0 10 1k 1M, NC 0.1 22 free, NC Units k pF pF 5.2 Capacitor Equivalent Circuits (a) Property editor (b) Equivalent circuit Figure 4. Capacitor property editor and equivalent circuit The default value of ESR is 2m . (Note 2) These parameters can take any positive value or zero in simulation but it does not guarantee the operation of the IC in any condition. Refer to the datasheet to determine adequate value of parameters. 6 Recommended Products 6.1 Op-Amp BD87521G-LB : 1ch Excellent EMI Immunity High Output Drive Rail-to-Rail I/O CMOS Op-Amp. [JP] [EN] [CN] [KR] [TW] [DE] BD87522FJ-LB : 2ch Excellent EMI Immunity High Output Drive Rail-to-Rail I/O CMOS Op-Amp. [JP] [EN] [CN] [KR] [TW] [DE] BD87524FV-LB : 4ch Excellent EMI Immunity High Output Drive Rail-to-Rail I/O CMOS Op-Amp. [JP] [EN] [CN] [KR] [TW] [DE] Technical Articles and Tools can be found in the Design Resources on the product web page. ©2024 ROHM Co., Ltd. 3/3 67UG009E Rev.001 Apr.2024 Datasheet General Precaution 1. Before you use our Products, you are requested to carefully read this document and fully understand its contents. ROHM shall not be in any way responsible or liable for failure, malfunction or accident arising from the use of any ROHM's Products against warning, caution or note contained in this document. 2. All information contained in this document is current as of the issuing date and subject to change without any prior notice. Before purchasing or using ROHM's Products, please confirm the latest information with a ROHM sales representative. 3. The information contained in this document is provided on an "as is" basis and ROHM does not warrant that all information contained in this document is accurate and/or error-free. ROHM shall not be in any way responsible or liable for an y damages, expenses or losses incurred b y you or third parties resulting from inaccuracy or errors of or concerning such information. Notice WE © 2015 ROHM Co., Ltd. All rights reserved. Rev.001