CMOS Operational Amplifier ROHM Mouser User Guide
- August 20, 2024
- ROHM
Table of Contents
CMOS Operational Amplifier ROHM Mouser
Specifications
- Product: ROHM Solution Simulator
- Type: Ultra Small Package & High Precision Rail-to-Rail Input/Output CMOS Operational Amplifier
Product Usage Instructions
- This product allows you to simulate the transient response to a sine wave input using voltage follower configured Op-Amps. You can observe the output voltage and how accurately the sine wave input voltage is reproduced. Customization of component parameters like VSOURCE and peripheral components is possible for simulating the voltage follower under desired operating conditions.
- The simulation settings, including parameter sweep and convergence options, can be configured from the ‘Simulation Settings’. Refer to Figure 2 for an example of the simulation settings. Table 1 displays the default setup of the simulation.
- Table 2 lists the simulation condition parameters such as frequency, peak voltage, initial phase, VSOURCE parameters, and more. Ensure that the values are within the specified ranges for accurate simulations.
- Figure 3 illustrates how the VSOURCE parameters correspond to the VIN stimulus waveform. Adjust the initial phase, peak voltage, DC offset, and other parameters as needed for your simulation.
- The Op-Amp model pins are essential for simulating input/output characteristics. Pin names like +IN, -IN, VDD, VSS, OUT, and SDNB are used for simulation purposes. Note that this model focuses on behavioral characteristics.
- Table 4 displays a list of capacitors used in the simulation circuit. Each component has default values that can be modified to suit your simulation requirements.
FAQ
- Q: Can I change the default simulation settings?
- A: It is recommended not to change the Simulation Type setting. However, you can customize parameters within the specified ranges for accurate simulations.
ROHM Solution Simulator
- Ultra Small Package & High Precision Rail-to-Rail Input/Output CMOS Operational Amplifier
- TLR377GYZ – 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 the 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 recommends double-checking those characteristics with the actual board where the chips will be mounted on.
Simulation Schematic
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 a 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.
Table 1. Simulation settings default setup
| Parameters | Default | Note |
|---|---|---|
| Simulation Type | Time-Domain | Do not change the Simulation Type |
| End Time | 300 µs | – |
| Advanced options | Balanced | – |
| Convergence Assist | – | |
| Manual Options | .temp 27 | – |
Simulation Conditions
Table 2. List of the simulation condition parameters
| Instance Name | Type | Parameters | Default Value | Variable Range | Units |
|---|---|---|---|---|---|
| Min | Max |
VSOURCE
|
Voltage Source
| Frequency| 10k| 10| 10M| Hz
Peak_voltage| 0.5| 0| 5.5| V
Initial_phase| 0| free| °
DC_offset| 2.5| 0| 5.5| V
DF| 0.0| fixed| 1/s
AC_magnitude| 0.0| fixed| V
AC_phase| 0.0| fixed| °
VDD
| Voltage Source For Op-Amp| Voltagelevel| 5| 1.8 (Note1)| 5.5 (Note1)_|
V
AC_magnitude| 0.0| fixed| V
AC_phase| 0.0| fixed| °
SDNB
|
Voltage Source For Shutdown Setting
| Initial_value| 5| VSS| VDD| V
Pulse_value| 0| VSS| VDD| V
ramptime_initial_to_pulse| 100| free| ns
ramptime_pulse_to_initial| 100| free| ns
Start_delay| 250| free| µs
Pulse_width| 500| free| µs
Period| 1| 1| –| ms
(Note 1) Set it to the guaranteed operating range of the Op-Amps.
VSOURCE parameter setup
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 |
| SDNB | Shutdown setting |
Peripheral Components
Bill of Material
Table 4 shows the list of components used in the simulation schematic. Each of
the capacitors has the parameters of the 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 | Variable Range | Units |
|---|---|---|---|---|
| Min | Max | |||
| Resistor | R1_1 | 0 | 0 | 10 |
| RL1 | 10k | 1k | 1M, NC | Ω |
| Capacitor | C1_1 | 0.1 | 0.1 | 22 |
| CL1 | 10 | free, NC | pF |
Capacitor Equivalent Circuits
The default value of ESR is 2m Ω.
(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 the adequate value of parameters.
Recommended Products
Op-Amp
TLR377GYZ: Ultra Small Package & High Precision Rail-to-Rail Input/Output CMOS
Operational Amplifier. [JP] [EN]
[CN] [KR] [TW]
[DE]
Technical Articles and Tools can be found in the Design Resources on the product web page.
General Precaution
-
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 of ROHM’s Products against warning, caution, or note contained in this document. -
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.
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The information contained in this document is provided on an “as is” basis and ROHMd 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 any damages, expenses, or losses incurred by you or third parties resulting from inaccuracy or errors of or concerning such information.
Notice – WE Rev.001
© 2015 ROHM Co., Ltd. All rights reserved.
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