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Operational Amplifier Version 1.0 Chapter 1 Introduction 1 Introduction In this document, we will introduce how to use the amplifier function on the MB95F430 series. Chapter 2 gives an overview on operational amplifier. Chapter 3 introduces the operations of operational amplifier.
Operational Amplifier Version 1.0 Chapter 2 Amplifier Overview 2 Amplifier Overview Amplifier Overview The operational amplifier can be used to sense the ground current, and support front-end The operational amplifier can be used to sense the ground current, and support front-end analog signal conditioning prior to A/D conversion.
Block Diagram of Operational Amplifier Figure 1 Block Diagram of Operational Amplifier Pins of Operational Amplifier The OPAMP uses the OPAMP_P pin and the OPAMP_N pin as the analog input pins of the operational amplifier, and uses the OPAMP_O pin as the analog output pin of the operational amplifier.
Operational Amplifier Version 1.0 Chapter 2 Amplifier Overview OPAMP Control Register The OPAMP control register (OPCR) is used to turn on and off the OPAMP, to enable and disable OPAMP analog output, and to enable and disable OPAMP analog input. The register can also be used to set the OPAMP to operate as a standalone open loop operational amplifier, or a non-inverting closed loop operational amplifier with six different closed loop gain settings that can be selected by the software.
Operational Amplifier Version 1.0 Chapter 2 Amplifier Overview ■ Functions of Bits in OPAMP Control Register (OPCR) ■ OPAMP Operating Mode Settings Notes: •While the OPAMP is operating, modifying the settings of RES2, RES1 and RES0 is allowed, however, do not use the output signal of the OPAMP or execute A/D conversion until OPAMP output becomes stable.
Operational Amplifier Version 1.0 Chapter 3 Operations of Operational Amplifier 3 Operations of Operational Amplifier Operations of Operational Amplifier The operational amplifier can be activated by setting the PD bit in the OPCR register using the The operational amplifier can be activated by setting the PD bit in the OPCR register using the software.
Operational Amplifier Version 1.0 Chapter 4 Amplifier setting procedure 4 Amplifier setting procedure Below is an example of procedure for setting the operational amplifier. ● Initial settings 1) Set both OPCR: OPID and OPCR: OPOD to "0" to enable both OPAMP analog input and OPAMP analog output.
5 Amplifier Driver This is OPAMP driver description. 5.1 Peripheral Usage The MCU pins used as below: OPAMP_N,used as amplifier negative input; OPAMP_P,used as amplifier positive input; OPAMP_O,used as amplifier output; 5.2 Driver Code 5.2.1 General Definition typedef unsigned char BOOLEAN; typedef unsigned char INT8U;...
6 Typical Application This is the typical application introduction. 6.1 HW Design In this application, we will test the operational amplifier in the MB95F430K. The HW is designed as below. The R1, R2, R3 is used in open-loop amplifier. Figure 4 Hardware Design 6.2 Sample Code void main(void) Return...
Operational Amplifier Version 1.0 Chapter 7 More Information 7 More Information For more Information on FUJITSU Semiconductor products, visit the following websites: English version: http://www.fujitsu.com/cn/fsp/services/mcu/mb95/application_notes.html Simplified Chinese Version: http://www.fujitsu.com/cn/fss/services/mcu/mb95/application_notes.html MCU-AN-500080-E-10 - Page 14...