PSoC® Creator™ Component Data Sheet Operational Amplifier (Opamp) 1.60 Features • Follower or Opamp configuration • Unity gain bandwidth > 3.0 MHz • Input offset voltage 2.0 mV max • Rail-to-rail inputs and output • Output direct low resistance connection to pin • 25 mA output current • Programmable power and bandwidth • Internal connection for follower (saves pin) General Description The Opamp component provides a low voltage, low power operational amplifier and may be internally connected as a voltage follower. The inputs and output may be connected to internal routing nodes, directly to pins, or a combination of internal and external signals. The Opamp is suitable for interfacing with high impedance sensors, buffering the output of voltage DACs, driving up to 25 mA; and constructing active filters in any standard topology. Input/Output Connections This section describes the various input and output connections for the Opamp. An asterisk (*) in the list of I/Os indicates that the I/O may be hidden on the symbol under the conditions listed in the description of that I/O. Non-Inverting – Analog When the Opamp is configured as a follower, this I/O is the voltage input. If the Opamp is configured as an Opamp, this I/O acts as the standard Opamp non-inverting input. Inverting – Analog * When the Opamp component is configured for Opamp mode, this I/O is the normal inverting input. When the Opamp is configured for Follower mode, this I/O is hard-connected to the output and the I/O is unavailable. Cypress Semiconductor Corporation • 198 Champion Court • San Jose, CA 95134-1709 • 408-943-2600 Document Number: 001-65669 Rev. ** Revised December 13, 2010 Operational Amplifier (Opamp) PSoC® Creator™ Component Data Sheet Vout – Analog The output is directly connected to a pin. It is capable of driving 25 mA and can be connected to internal loads using the analog routing fabric. When used for internal routing, the output remains connected to the pin. Schematic Macro Information The default Opamp in the Component Catalog is a schematic macro using an Opamp component with default settings. The Opamp component is connected to an analog Pin component named Vout_1. Parameters and Setup Drag an Opamp component onto your design and double-click it to open the Configure dialog. Figure 1 Configure Opamp Dialog The Opamp has the following parameters: Page 2 of 16 Document Number: 001-65669 Rev. ** PSoC® Creator™ Component Data Sheet Operational Amplifier (Opamp) Mode This parameter allows you to select between two configurations: "Opamp" and "Follower". In Opamp mode, all three terminals are available for connection. In Follower mode, the inverting input is internally connected to the output to create a voltage follower. Opamp is the default configuration. Figure 2 Configuration Options Power The Opamp works over a wide range of operating currents. Higher operating current increases Opamp bandwidth. The Power parameter allows you to select the power level: • In High and Medium power modes, the output is a class AB stage, enabling direct drive of substantial output currents. • In Low power mode, the output is a class A stage with limited current drive. • In "Low Power Over Compensated" (LPOC) mode, the output is a class A stage. For PSoC 3 ES3 silicon, the LPOC mode is used for low-power transimpedance amplifiers (TIAs). This mode has the same drive capability as low power, but includes additional compensation for circuit topologies with higher than normal input capacitance as is often seen in photo sensors and other current-output sensors of various types. Wider bandwidth TIAs can be implemented using the medium or high power settings. In this case, exercise the usual care in dealing with compensation for capacitively loaded sources. Note The above description of LPOC mode is correct for PSoC 3 ES3 silicon only. For PSoC 3 ES2 silicon, LPOC mode is not supported; High Power mode should be used instead. For PSoC 3 ES2 silicon, the High Power setting enables the 1.024 V Vref on the positive input. Any design with an Opamp that requires this Vref must include at least one Opamp that uses this High Power mode setting. Placement Each Opamp is directly connected to specific GPIOs. Document Number: 001-65669 Rev. ** Page 3 of 16 Operational Amplifier (Opamp) PSoC® Creator™ Component Data Sheet Non-inverting input Inverting input Output opamp_0 P0[2] P0[3] P0[1] opamp_1 P3[5] P3[4] P3[6] opamp_2 P0[4] P0[5] P0[0] opamp_3 P3[3] P3[2] P3[7] Refer to the device data sheet for the part being used for the specific physical pin connections. Input signals may use the analog global routing buses in addition to the dedicated input pins. Using the direct connections utilizes fewer internal routing resources and results in lower route resistance and capacitance. The output pin associated with each specific location will always be driven by the Opamp, when enabled. Ports P0[3] and P3[2] are also used for connection to a capacitor for bypassing the bandgap reference supplied to the ADC, for a reference output, or for an input from an external reference. When these reference connections are used, routing to the Opamp inverting inputs must be done through the analog global routing buses. The following shows one example of how the Opamp may be connected using the Design-Wide Resources Pin Editor. Figure 3 Example placement Page 4 of 16 Document Number: 001-65669 Rev. ** PSoC® Creator™ Component Data Sheet Operational Amplifier (Opamp) Resources The Opamp component uses one Opamp resource per instance. When used in the Opamp mode with external components (that is, not routing the output through the analog globals), no routing resources are used. API Memory (Bytes) Digital Blocks Analog Blocks Datapaths Macro cells Status Registers Control Registers Counter7 Flash RAM Pins (per External I/O) 1 Opamp fixed block N/A N/A N/A N/A N/A 202 2 3 Application Programming Interface Application Programming Interface (API) routines allow you to configure the component using software. The following table lists and describes the interface to each function. The subsequent sections cover each function in more detail. By default, PSoC Creator assigns the instance name "Opamp_1" to the first instance of a component in a given design. You can rename it to any unique value that follows the syntactic rules for identifiers. The instance name becomes the prefix of every global function name, variable, and constant symbol. For readability, the instance name used in the following table is "Opamp". Function Description void Opamp_Start(void) Turns on the Opamp and sets the power level to the value chosen during the parameter selection. void Opamp_Stop(void) Disable Opamp (power down) void Opamp_SetPower(uint8 power) Set the power level. void Opamp_Sleep(void) Stops and saves the user configuration. void Opamp_Wakeup(void) Restores and enables the user configuration. void Opamp_SaveConfig(void) Empty function. Provided for future usage. void Opamp_RestoreConfig(void) Empty function. Provided for future usage. void Opamp_Init(void) Initializes or restores default Opamp configuration. void Opamp_Enable(void) Enables the Opamp. Document Number: 001-65669 Rev. ** Page 5 of 16 Operational Amplifier (Opamp) PSoC® Creator™ Component Data Sheet Global Variables Variable Opamp_initVar Description Indicates whether the Opamp has been initialized. The variable is initialized to 0 and set to 1 the first time Opamp_Start() is called. This allows the component to restart without reinitialization after the first call to the Opamp_Start() routine. If reinitialization of the component is required, then the Opamp_Init() function can be called before the Opamp_Start() or Opamp_Enable() function. void Opamp_Start(void) Description: Turns on the Opamp and sets the power level to the value chosen during the parameter selection. Parameters: None Return Value: None Side Effects: None void Opamp_Stop(void) Description: Turns off the Opamp and enable its lowest power state. Parameters: None Return Value: None Side Effects: None void Opamp_SetPower(uint8 power) Description: Sets the power level. Parameters: (uint8) power: Sets the power level to one of four settings, LPOC, Low, Medium, or High. Power Setting Notes Opamp_LPOCPOWER Least power, compensated for TIA. Opamp_LOWPOWER Least power, reduced bandwidth Opamp_MEDPOWER Opamp_HIGHPOWER Return Value: None Side Effects: None Page 6 of 16 Highest bandwidth Document Number: 001-65669 Rev. ** PSoC® Creator™ Component Data Sheet Operational Amplifier (Opamp) void Opamp_Sleep(void) Description: This is the preferred routine to prepare the component for sleep. The Opamp_Sleep() routine saves the current component state. Then it calls the Opamp_Stop() function and calls Opamp_SaveConfig() to save the hardware configuration. Call the Opamp_Sleep() function before calling the CyPmSleep() or the CyPmHibernate() function. Refer to the PSoC Creator System Reference Guide for more information about power management functions. Parameters: None Return Value: None Side Effects: None void Opamp_Wakeup(void) Description: This is the preferred routine to restore the component to the state when _Sleep() was called. The Opamp_Wakeup() function calls the Opamp_RestoreConfig() function to restore the configuration. If the component was enabled before the Opamp_Sleep() function was called, the Opamp_Wakeup() function will also re-enable the component. Parameters: None Return Value: None Side Effects: Calling the Opamp_Wakeup() function without first calling the Opamp_Sleep() or Opamp_SaveConfig() function may produce unexpected behavior. void Opamp_SaveConfig(void) Description: Empty function. Provided for future usage. Parameters: None Return Value: None Side Effects: None void Opamp_RestoreConfig(void) Description: Empty function. Provided for future usage. Parameters: None Return Value: None Side Effects: None Document Number: 001-65669 Rev. ** Page 7 of 16 Operational Amplifier (Opamp) PSoC® Creator™ Component Data Sheet void Opamp_Init(void) Description: Initializes or restores the component according to the customizer Configure dialog settings. It is not necessary to call Opamp_Init() because the Opamp_Start() routine calls this function and is the preferred method to begin component operation. Parameters: None Return Value: None Side Effects: All registers will be set to values according to the customizer Configure dialog. void Opamp_Enable(void) Description: Activates the hardware and begins component operation. It is not necessary to call Opamp_Enable() because the Opamp_Start() routine calls this function, which is the preferred method to begin component operation. Parameters: None Return Value: None Side Effects: If the initVar variable is already set, this function only calls the Opamp_Enable() function. Sample Firmware Source Code PSoC Creator provides numerous example projects that include schematics and example code in the Find Example Project dialog. For component-specific examples, open the dialog from the Component Catalog or an instance of the component in a schematic. For general examples, open the dialog from the Start Page or File menu. As needed, use the Filter Options in the dialog to narrow the list of projects available to select. Refer to the "Find Example Project" topic in the PSoC Creator Help for more information. Page 8 of 16 Document Number: 001-65669 Rev. ** PSoC® Creator™ Component Data Sheet Operational Amplifier (Opamp) DC and AC Electrical Characteristics The following values are based on characterization data. Specifications are valid for -40° C £ TA £ 85° C and TJ £ 100° C except where noted. Unless otherwise specified in the tables below, all Typical values are for TA = 25° C, Vdda = 5.0 V, Power = High, output referenced to analog ground, Vssa. 5.0 V/3.3 V DC Electrical Characteristics Data collection is currently in progress. This table will be updated in a future release. Parameter Description Vi Input voltage range Vioff Input offset voltage Conditions Min Typ Max Units VSSA – VDDA V Power mode = minimum – 0.5 2 mV Power mode = low – TBD TBD mV Power mode = medium – TBD TBD mV Power mode = high – TBD TBD mV TCVos Input offset voltage drift with temperature Power mode = high – ±12 – µV/°C Avol Open-loop gain Power mode = high TBD TBD – dB Ge1 Gain error, unity gain buffer mode Rload = 1 k – – ±0.1 % Rin Input resistance Positive gain, noninverting input TBD – – M Cin Input capacitance Routing from pin – TBD TBD pF Vo Output voltage range 1 mA, source or sink, power mode = high VSSA + 0.05 – VDDA – 0.05 V 100 K to Vdda / 2, G = 1 TBD – TBD V VSSA + 500 mV £ Vout £ VDDA –500 mV, VDDA > 2.7 V 25 – – mA VSSA + 500 mV £ Vout £ VDDA –500 mV, 1.7 V = VDDA £ 2.7 V 16 – – mA Power mode = min – TBD TBD µA Power mode = low – TBD TBD µA Power mode = med – TBD TBD µA Power mode = high – 900 2000 µA Iout Idd Output current, source or sink Quiescent current CMRR Common mode rejection ratio 80 – – dB PSRR Power supply rejection ratio TBD – – dB Document Number: 001-65669 Rev. ** Page 9 of 16 Operational Amplifier (Opamp) PSoC® Creator™ Component Data Sheet Figures Histogram Input Offset Voltage T=25C, Vdda=5.0V Input Offset Voltage vs Temperature Power=High, Vdda=5.0V 2.5 600 No. of Opamps 500 2 mV 1.5 400 1 Spec Limit Typical 0.5 300 Mean 0 -0.5 200 Typical Range -1 100 Spec Limit -1.5 -2 0.5 0.4 0.3 0.2 0.1 0.0 -0.1 -0.2 -0.3 -0.4 -0.5 0 mV Operating current vs temp, Vdd=5.0V 0 degC 25 -25 50 75 100 125 Operating current vs voltage T=25C 1200 1200 1000 uA 800 1000 High uA High 800 600 600 Medium 400 Medium 400 200 0 -60 -2.5 -50 Low , LPOC -40 -20 0 20 40 Temp degC 60 80 200 100 120 Low , LPOC 0 0 1 2 Vdda 3 V 4 5 6 Opamp Voffset vs Common Mode Voltage and Temperature, Power Mode = High Data collection is currently in progress. Page 10 of 16 Document Number: 001-65669 Rev. ** PSoC® Creator™ Component Data Sheet Opamp Operating Current vs Vdda, Power Mode = Minimum Data collection is currently in progress. Opamp Operating Current vs Vdda, Power Mode = Medium Data collection is currently in progress. Document Number: 001-65669 Rev. ** Operational Amplifier (Opamp) Opamp Operating Current vs Vdda, Power Mode = Low Data collection is currently in progress. Opamp Operating Current vs Vdda, Power Mode = High Data collection is currently in progress. Page 11 of 16 Operational Amplifier (Opamp) PSoC® Creator™ Component Data Sheet 0.6 0.4 0.4 V 0.6 SINK 0.2 Diff from Vdda,Vss Output voltage vs load current, Vdda=5.0V, Power=High -40 30 100 -40 30 100 0 -0.2 SOURCE Diff from Vdda -0.4 Diff from Vdda, Vss V Output voltage vs load current, Vdda=1.71V, P=High 0 5 10 15 I Load mA 20 25 -0.2 SOURCE Diff from Vdda -0.4 0 30 Output voltage vs load current, Vdda=2.7V, P=Med 5 10 15 I Load mA 20 25 30 Output voltage vs load current Vdda=5.0V, Power=Medium 0.2 0.2 SINK 0 -0.2 0 -0.1 SOURCE Diff from Vdda Diff from Vdda, Vss -0.1 SINK 0.1 V 0.1 V -40 30 100 -40 30 100 0 -0.6 -0.6 Diff from Vdda, Vss SINK 0.2 -40 30 100 -40 30 100 -0.3 -0.4 -0.5 -0.6 -0.7 -0.8 SOURCE Diff from Vdda -0.2 -0.3 -40C 30C 100C -40C 30C 100C -0.4 -0.5 -0.6 -0.7 -0.8 0 Page 12 of 16 0.5 1 I Load mA 1.5 2 0 0.5 1 I Load mA 1.5 2 Document Number: 001-65669 Rev. ** PSoC® Creator™ Component Data Sheet Operational Amplifier (Opamp) Output voltage vs load current, Vdda=2.7V, P=Low Output voltage vs load current, Vdda=5.0V, P=Low 0.4 0.4 -40 30 100 -40 30 100 Diff from Vdda, Vss 0.1 SINK V 0.2 0 -0.1 -0.2 SOURCE Diff from Vdda -0.3 -0.4 0.00 0.05 I Load mA 0.10 -40 30 100 -40 30 100 0.3 Diff from Vdda, Vss V 0.3 0.15 0.2 0.1 SINK 0.0 -0.1 -0.2 SOURCE Diff from Vdda -0.3 -0.4 0.00 0.05 0.10 I Load 0.15 mA 5.0 V/3.3 V AC Electrical Characteristics Data collection is currently in progress. This table will be updated in a future release. Parameter GBW SR en Description Gain-bandwidth product Slew Rate Input noise density Document Number: 001-65669 Rev. ** Conditions Min Typ Max Units Power mode = minimum, 100 mV pk-pk, 15 pF load TBD TBD – MHz Power mode = low, 100 mV pk-pk, 15 pF load TBD TBD – MHz Power mode = medium, 100 mV pk-pk, 15 pF load TBD TBD – MHz Power mode = high, 100 mV pkpk, 200 pF load 3 TBD – MHz Power mode = minimum, 15 pF load TBD TBD – V/µs Power mode = low, 15 pF load TBD TBD – V/µs Power mode = medium, 15 pF load TBD TBD – V/µs Power mode = high, 200 pF load 3 TBD – V/µs Power mode = high, Vdda = 5 V, at 100 kHz – 45 – nV/sqrtHz Page 13 of 16 Operational Amplifier (Opamp) PSoC® Creator™ Component Data Sheet Figures Open Loop Gain and Phase vs Frequency and Opamp Closed Loop Frequency Response, Gain = 1, Temperature, Power Mode = High, Cl = 15 Pf, Vdda = 5V Vdda = 5V Data collection is currently in progress. Opamp Closed Loop Frequency Response, Gain = 10, Vdda = 5V Data collection is currently in progress. Opamp test Circuit for Gain = 10 Data collection is currently in progress. Page 14 of 16 Document Number: 001-65669 Rev. ** PSoC® Creator™ Component Data Sheet Opamp CMRR vs Frequency Operational Amplifier (Opamp) Input Voltage Noise Density T=25C, Vdda = 5.0V, P=high 1000 nV/rtHz Data collection is currently in progress. 100 10 0.01 0.1 1 kHz 10 100 1000 Opamp PSRR vs Frequency Data collection is currently in progress. Note More specifications at other voltages and graphs may be added after characterization. Component Changes This section lists the major changes in the component from the previous version. Version 1.60 Description of Changes Added a GUI Configuration Editor Reason for Changes / Impact For easier use a GUI has been added to set the two parameters from a drop down Added characterization data to datasheet Minor datasheet edits and updates Document Number: 001-65669 Rev. ** Page 15 of 16 Operational Amplifier (Opamp) Version 1.50 Description of Changes Added Sleep/Wakeup and Init/Enable APIs. PSoC® Creator™ Component Data Sheet Reason for Changes / Impact To support low power modes, as well as to provide common interfaces to separate control of initialization and enabling of most components. © Cypress Semiconductor Corporation, 2009-2010. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in a Cypress product. Nor does it convey or imply any license under patent or other rights. Cypress products are not warranted nor intended to be used for medical, life support, life saving, critical control or safety applications, unless pursuant to an express written agreement with Cypress. Furthermore, Cypress does not authorize its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress against all charges. PSoC® is a registered trademark, and PSoC Creator™ and Programmable System-on-Chip™ are trademarks of Cypress Semiconductor Corp. All other trademarks or registered trademarks referenced herein are property of the respective corporations. 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Disclaimer: CYPRESS MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARD TO THIS MATERIAL, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Cypress reserves the right to make changes without further notice to the materials described herein. Cypress does not assume any liability arising out of the application or use of any product or circuit described herein. Cypress does not authorize its products for use as critical components in lifesupport systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress’ product in a life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress against all charges. Use may be limited by and subject to the applicable Cypress software license agreement. Page 16 of 16 Document Number: 001-65669 Rev. **