ROHM LMR1001YF-C Voltage Rail-to-Rail Input and Output CMOS Amplifier
Important Information
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.
Simulation Schematic
Figure 1. 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.
Figure 2. Simulation Settings and execution
Table 1. Simulation settings default setup
| Parameters | Default | Note |
| Simulation Type | Time-Domain | Do not change Simulation Type |
| End Time | 200 us | – |
| 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 | Voltage_ level | 5 | 2.7(Note1) | V | V |
| AC_ magnitude | 0.0 | fixed | V | |||
| AC_ phase | 0.0 | fixed | ° | |||
(Note 1) Set it to the guaranteed operating range of the Op-Amps.
VSOURCE parameter setup
Figure 3 shows how the VSOURCE parameters correspond to the VIN stimulus waveform.
Figure 3. VSOURCE parameters and its waveform
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 |
| NC1 | No connection inside |
| NC2 | No connection inside |
| NC3 | No connection inside |
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 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 | 10 | 10 | kΩ |
| RL1 | 10k | 1k | 1M, NC | Ω | |
| Capacitor | C1_1 | 0.1 | 0.1 | 22 | pF |
| CL1 | 10 | free, NC | pF | ||
Capacitor Equivalent Circuits
Figure 4. Capacitor property editor and equivalent circuit
- (a) Property editor
- (b) Equivalent circuit
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 adequate value of parameters.
Recommended Products
Op-Amp
LMR1001YF-C : Automotive Zero Drift Low Offset Voltage Rail-to-Rail I/O CMOS Op-Amp. [JP] [EN] [CN] [KR] [TW] [DE] LMR1001YG-C : Automotive Zero Drift Low Offset Voltage Rail-to-Rail I/O CMOS Op-Amp. [JP] [EN] [CN] [KR] [TW] [DE] LMR1002F-LB : Automotive Zero Drift Low Offset Voltage 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.
Notice
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Documents / Resources
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