ST X-NUCLEO-IKA01A1 User Manual
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ST X-NUCLEO-IKA01A1 User Manual

ST X-NUCLEO-IKA01A1 User Manual

Getting started with the multifunctional expansion board based on operational amplifiers for stm32 nucleo
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Summary of Contents for ST X-NUCLEO-IKA01A1

  • Page 1 Chipsmall Limited consists of a professional team with an average of over 10 year of expertise in the distribution of electronic components. Based in Hongkong, we have already established firm and mutual-benefit business relationships with customers from,Europe,America and south Asia,supplying obsolete and hard-to-find components to meet their specific needs.
  • Page 2 The X-NUCLEO-IKA01A1 is a multifunctional expansion board based on operational amplifiers. It provides an easy-to-use and affordable solution for different multifunctional use cases with your STM32 Nucleo board. The X-NUCLEO-IKA01A1 is compatible with the Arduino™ UNO R3 connector, and supports the addition of other boards that can be stacked for enhanced applications with an STM32 Nucleo expansion board.

  • Page 3: Table Of Contents

    Contents UM1955 Contents Instrumentation amplifier configuration ......4 Schematic diagram ......... . . 4 How to set up the board .
  • Page 4 UM1955 Contents Schematic diagram ......... . 15 How to set up the board .

  • Page 5: Instrumentation Amplifier Configuration

    Instrumentation amplifier configuration UM1955 Instrumentation amplifier configuration The instrumentation amplifier configuration allows you to amplify a differential signal without impacting it thanks to the high impedance of operational amplifier input stage. Moreover, with the high accuracy resistors, this configuration features high rejection to common mode voltage.

  • Page 6: Theoretical Output

    Software and measurements The output voltage of the instrumentation amplifier is connected to the pin A1 of the Arduino UNO R3 connector. The X-CUBE-ANALOG1 software available on www.st.com allows users to measure this voltage. DocID028405 Rev 1 5/28...

  • Page 7: Current Sensing Configuration

    Current sensing configuration UM1955 Current sensing configuration The current sensing configuration allows monitoring of the current that is consumed by an application. On this expansion board, the operational amplifier is set to a high-side current sensing structure. This means that the current is measured close to the supply voltage, thus before the application.

  • Page 8: How To Set Up The Board

    UM1955 Current sensing configuration How to set up the board With this expansion board, users can measure the current of a USB-powered device or any 5 V application. It is important not to go beyond 5 V in order to avoid operational amplifier damage.

  • Page 9: Software And Measurements

    Software and measurements The output voltage of the instrumentation amplifier is connected to pin A2 of the Arduino UNO R3 connector. The X-CUBE-ANALOG1 software, available on www.st.com, allows users to measure this voltage. Note that with this predefined configuration, it is possible to measure up to 2.08 A. If a higher current is drawn through the application, the operational amplifier will be saturated and thus its output voltage will not reflect the real current.

  • Page 10: Buffer Configuration

    UM1955 Buffer configuration Buffer configuration The buffer configuration allows users to connect a high output impedance circuit to a low input impedance circuit without disturbing the signal. This function is possible thanks to the high impedance of the operational amplifier input stage and the operational amplifier output capabilities.

  • Page 11: Full Wave Rectifier

    Full wave rectifier UM1955 Full wave rectifier The full wave rectifier configuration allows rectification of an input signal. This means that by defining a reference voltage with a potentiometer, all signals below it will become positive. When the voltage goes above the reference, the output voltage will not change. Schematic diagram Figure 5 shows the circuit schematic of the full wave rectifier configuration.

  • Page 12: Photodiode/Uv Sensor

    How to set up the expansion board This configuration does not require any setup. Only the output voltage is reported. This voltage is available on pin A4 of the Arduino UNO R3 connector and PC1 of the ST morpho connectors (not mounted in the expansion board).

  • Page 13: Additional Possible Use

    For additional details on the analog conditioning circuit used for a high impedance sensor and especially on a UV sensor, refer to application note AN4451 “Signal conditioning for a UV sensor”, available on www.st.com. 12/28 DocID028405 Rev 1...

  • Page 14: Led Driver Configuration

    UM1955 LED driver configuration LED driver configuration The LED driver configuration allows users to drive an LED with a constant current. As shown in Figure 7, when the forward voltage varies, the current and thus the light intensity is highly variable. Figure 7.

  • Page 15: How To Set Up The Board

    LED driver configuration UM1955 How to set up the board There is no specific connection to make the application function, but a PWM input signal is required on pin D3 of the Arduino UNO R3 connector. One or several external LEDs in parallel can be added in order to drive several LEDs at the same time.

  • Page 16: Window Comparator Configuration

    UM1955 Window comparator configuration Window comparator configuration The window comparator configuration allows the user to compare a signal to two threshold voltages. When the signal is out of the required voltage range, the output of the operational amplifier toggles. Schematic diagram Figure 9 shows the schematic of the window comparator configuration.

  • Page 17: Theoretical Output

    = 2.2 V th_high From a software standpoint, the D2 and D4 pins on the Arduino UNO R3 connectors or PA10 and PB5 on the ST morpho connectors (not mounted in the expansion board) must be monitored. Theoretical output The operational amplifier output toggles when the signal is out of the specified window.

  • Page 18: Prototyping Area

    UM1955 Prototyping area Prototyping area A prototyping area has been implemented in order to perform small additional configurations. It allows the user to connect an expansion board, components on input and output, and a divider bridge for a 5 V to 3.3 V conversion, as shown on the following figure. Figure 11.

  • Page 19: Scenario Examples

    Scenario examples UM1955 Scenario examples Current sensing: motor outside of standard operation To avoid damage to an application, it can be useful to know how much current is going through the motor. With the high-side current sensing or instrumentation amplifier configuration, the current can be monitored.

  • Page 20: Body Detection

    For more details on PIR signal conditioning, please refer to application note AN4368 “Signal conditioning for pyroelectric passive infrared (PIR) sensors”, available on www.st.com DocID028405 Rev 1 19/28...

  • Page 21: Operational Amplifiers On The Expansion Board

    Operational amplifiers on the expansion board UM1955 Operational amplifiers on the expansion board Table 2 summarizes the main parameters of the operational amplifiers used on this analog expansion board. Table 2. Operational amplifier main parameters Configuration on the expansion amplifier Comments (kHz) (µV)

  • Page 24: Bill Of Material (Bom)

    UM1955 Bill of material (BOM) Bill of material (BOM) Table 3. Bill of material (part 1) Voltage Item Ref. Part / value Watt Package Ampere C0, C1, C7, C14 0.1 µF SMD0603 C2, C12, C17, C18, C23 22 nF SMD0603 C3, C4 22 pF SMD0603...
  • Page 25 Bill of material (BOM) UM1955 Table 3. Bill of material (part 1) (continued) Voltage Item Ref. Part / value Watt Package Ampere NPN transistor 3STR1630 R1, R2, R3, R4 Resistor 10 k SMD0603 R5, R6 Resistor 47 k SMD0603 R7, R9, R40,R47 Resistor SMD0603 R11, R12, R13, R14, R15,...
  • Page 26 UM1955 Bill of material (BOM) Table 4. Bill of material (part 2) Item Manufacturer Orderable part number Additional notes Not mounted Not mounted Not mounted Vishay TEFD4300F BAT48JFILM ESDA7P60-1U1M ESDALCL6-2SC6 ESDALC6V1-1M2 JP3 jumper must be set on “Internal 3.3V” position CAN BE REMOVED / NOT MOUNTED CAN BE REMOVED /...

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