MAX7057 Evaluation Kit Evaluates: MAX7057 General Description The MAX7057 evaluation kit (EV kit) provides a proven design to evaluate the MAX7057 frequency-programmable ASK/FSK transmitter in a 16-pin SO package. The EV kit uses Windows XPM-, Windows VistaM-, and WindowsM 7-compatible software to provide a simple graphical user interface (GUI). The EV kit enables testing of the device’s RF performance and requires no additional support circuitry. The RF output uses a 50I matching network and an SMA connector for convenient connection to test equipment. The EV kit PCB comes with a MAX7057ASE+ installed on the EV kit. Features S Windows XP-, Windows Vista-, and Windows 7-Compatible Software S USB Powered S Proven PCB Layout S Proven Components List S Adjustable Programmable Frequency S Fully Assembled and Tested Ordering Information PART TYPE MAX7057EVKIT+ EV Kit +Denotes lead(Pb)-free and RoHS compliant. Component List DESIGNATION QTY DESCRIPTION DESIGNATION QTY BATT-2032 0 Not installed, battery holder and contact solution Battery Holders BA2032 C18, C23, C65, C67 4 10FF Q10%, 6.3V X5R ceramic capacitors (0805) Murata GRM188R60J106M BATT-AAA 0 Not installed, plastic battery holder Keystone 2468 C19, C24, C64, C66 4 1FF Q10%, 16V X5R ceramic capacitors (0603) Murata GRM188R61C105K C1, C9, C12 3 220pF Q5%, 50V C0G ceramic capacitors (0402) Murata GRM1535C1H221J C31, C32, C59, C61 4 100pF Q5%, 50V C0G ceramic capacitors (0603) Murata GRM1885C1H101J C2, C8, C13 3 0.01FF Q10%, 50V X7R ceramic capacitors (0402) Murata GRM155R71H103K C33, C34 2 3.9pF Q0.25pF, 50V C0G ceramic capacitors (0603) Murata GRM1885C1H3R9C C3, C6, C14 3 0.1FF Q10%, 16V X7R ceramic capacitors (0402) TDK C1005X7R1C104K C36 1 680pF Q5%, 50V C0G ceramic capacitor (0603) Murata GRM1555C1H681J 14 0.1FF Q10%, 16V X7R ceramic capacitors (0603) Murata GRM188R71C104K C38 1 6.8pF Q0.5pF, 50V C0G ceramic capacitor (0603) Murata GRM1885C1H6R8D 1 33nF Q10%, 16V X7R ceramic capacitor (0603) Murata GRM188R71C333K 2 22pF Q5%, 50V C0G ceramic capacitors (0603) Murata GRM1885C1H220J C5, C11, C15, C16, C17, C20, C21, C22, C58, C60, C68, C70, C71, C72 C7 C10, C39, C62, C63 1 220pF Q5%, 50V C0G ceramic capacitor (0603) Murata GRM1885C1H221K C69 C73, C74 4 10pF Q5%, 50V C0G ceramic capacitors (0603) Murata GRM1885C1H100J DESCRIPTION Windows, Windows XP, and Windows Vista are registered trademarks of Microsoft Corp. For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com. 19-5264; Rev 0; 5/10 MAX7057 Evaluation Kit Evaluates: MAX7057 Component List (continued) DESIGNATION QTY DESCRIPTION QTY R35 1 75I Q5% resistor (0603) DESCRIPTION C75 0 R37 1 330I Q5% resistor (0603) D1–D6 6 Yellow LEDs (1206) R40, R41 2 27I Q5% resistors (0603) D7–D12 6 Green LEDs (1206) R42 1 470I Q1% resistor (0603) R43 1 1.5kI Q5% resistor (0603) REFIN 0 Not installed, SMA female vertical connector RFOUT 1 SMA female vertical connector S1, S2 2 Momentary pushbutton switches S3 1 Quad SPST DIP switch (normally open) TP15, TP21–TP25, TP27 7 Red miniature test points TP29, TP36, TP38, TP40 4 Red multipurpose test points TP30–TP35, TP37, TP39, TP41 9 Black multipurpose test points U1 1 300MHz to 450MHz frequency-programmable ASK/FSK transmitter (16 SO) Maxim MAX7057ASE+ U2 1 32-bit microcontroller (68 QFN-EP*) Maxim MAXQ2000-RAX+ U3, U4, U9, U12 4 Low-noise LDO linear regulators (5 SC70) Maxim MAX8512EXK+ U5 0 Not installed, 93C46 3-wire EEPROM (8 SO) U6 1 UART-to-USB converter (32 TQFP) U7, U8, U10, U11 4 8-channel level translators (20 TSSOP) Maxim MAX3001EEUP+ Y1 1 16MHz crystal Crystek 017466 Y2 0 Not installed, 32.768kHz crystal GND-A–GND-F, P1.7, VADJ, VDUT-A, VDUT-B, VEXT, 3V3 12 1-pin headers J1 1 8-pin (2 x 4) header J2 1 6-pin (2 x 3) header J3, J4 0 Not installed, 40-pin (2 x 20) headers JU1–JU9, JU31–JU34 13 3-pin headers JU10, JU11 2 2-pin headers JU12 1 36-pin (2 x 18) header 1 13nH Q5% (0603) Murata LQW18AN13NJ00 L1 1 22nH Q5% (0603) Murata LQW18AN22NJ10 P1 1 USB type-B right-angle female receptacle Q1 1 Dual n-channel FET (6 SuperSOT) Fairchild FDC6301N L2 R1, R7, R8, RB 4 0I Q5% resistors (0603) R2, R44, R45, RA 0 Not installed, resistors (0603) R3, R50–R54, R56 7 100I Q5% resistors (0603) R4, R6, R14, R22, R23, R36, R38, R46, R47 9 150I Q5% resistors (0603) R11, R19, R20, R21, R24–R27, R33, R34 10 100kI Q1% resistors (0603) R13 1 59kI Q1% resistor (0603) R15 1 158kI Q1% resistor (0603) R18 1 43I Q5% resistor (0603) R30 1 50kI Q10% potentiometer Vishay TS63Y503k R31 1 27.4kI Q1% resistor (0603) R32 1 39.2kI Q1% resistor (0603) 2 DESIGNATION Not installed, ceramic capacitor (0603) *EP = Exposed pad. Maxim Integrated MAX7057 Evaluation Kit Evaluates: MAX7057 Component List (continued) DESIGNATION QTY DESCRIPTION Y3 1 16MHz crystal Hong Kong X'tals SSM1600000E18FAF Y4 1 6MHz crystal (HCM49) Hong Kong X'tals SSL600000018FAF DESIGNATION QTY — 33 Shunts DESCRIPTION — 1 USB high-speed A-to-B cables, 6ft — 1 PCB: MAX7057 EVALUATION KIT+ Component Suppliers SUPPLIER PHONE Crystek Corporation WEBSITE 800-237-3061 www.crystek.com Fairchild Semiconductor 888-522-5372 www.fairchildsemi.com Hong Kong X’tals Ltd. 852-35112388 www.hongkongcrystal.com Murata Electronics North America, Inc. 770-436-1300 www.murata-northamerica.com TDK Corp. 847-803-6100 www.component.tdk.com Vishay 203-268-6261 www.vishay.com Note: Indicate that you are using the MAX7057 when contacting these component suppliers. MAX7057 EV Kit Files FILE Maxim Integrated DESCRIPTION INSTALL.EXE Installs the EV kit files on your computer MAX7057.EXE Application program CDM20600.EXE Installs the USB device driver UNINSTALL.EXE Uninstalls the EV kit software USB_Driver_Help_200.PDF USB driver installation help file MAX7057_CONSOLE.EXE Advanced user interface application MAX7057.DLL Required for the advanced user interface CMODCOMM.DLL Required for the advanced user interface 3 MAX7057 Evaluation Kit Evaluates: MAX7057 Quick Start • MAX7057 EV kit Required Equipment • Windows XP, Windows Vista, or Windows 7 PC with a spare USB port • Spectrum analyzer the lower-right status bar indicates that the IC is connected. 8) The IC operates in ASK mode by default. Set the IC’s ASK frequency to 315MHz by typing 315 in the Frequency edit box inside the Low Frequency (0x04, 0x05) group box. Press enter to set the frequency. Note: In the following sections, software-related items are identified by bolding. Text in bold refers to items directly from the EV kit software. Text in bold and underlined refers to items from the Windows operating system. 9) Click on the ENABLE (0x08) checkbox in the ENABLE group box. Procedure 11) The spectrum analyzer should display a peak of approximately +10dBm at 315MHz. Set DATAIN to 0 by clicking its checkbox. The spectrum analyzer peak at 315MHz should be gone. Set DATAIN to 1 by clicking its checkbox. The center frequency is again at 315MHz. The EV kit is fully assembled and tested. Follow the steps below to verify board operation: 1)Visit www.maximintegrated.com/evkitsoftware to download the latest version of the EV kit software, 7057Rxx.ZIP. Save the EV kit software to a temporary folder and uncompress the ZIP file. 2) 3) Install the EV kit software and USB driver on your computer by running the INSTALL.EXE program inside the temporary folder. The program files are copied to your PC and icons are created in the Windows Start | Programs menu. During software installation, some versions of Windows may show a warning message indicating that this software is from an unknown publisher. This is not an error condition and it is safe to proceed with installation. Administrator privileges are required to install the USB device driver on Windows. Verify that all jumpers are in their default positions, as shown in Table 1. 4) Connect the USB cable from the PC to the EV kit board. A Windows message appears when connecting the EV kit board to the PC for the first time. Each version of Windows has a slightly different message. If you see a Windows message indicating ready to use, then proceed to the next step. Otherwise, open the USB_Driver_Help_200.PDF document in the Windows Start | Programs menu to verify that the USB driver was installed successfully. 5) 6) 7) 4 Start the EV kit software by opening its icon in the Start | Programs menu. The EV kit software main window appears, as shown in Figure 1. Connect the RFOUT SMA connector to the spectrum analyzer. Set the analyzer to a center frequency of 315MHz and a span of 4MHz. The EV kit GUI indicates that the digital USB hardware is connected in the lower-left status bar and 10) Click on the DATAIN (0x07) checkbox in the DATAIN group box to set it to 1. 12) To test FSK, first uncheck the ENABLE (0x08) checkbox. Click on the mode checkbox in the CONTROL (0x00) group box to set FSK. The FSK and High Frequency (0x02, 0x03) group boxes become active. In the FSK group box, set the center frequency to 315MHz and the frequency deviation to Q50kHz (default). The High Frequency and Low Frequency automatically set based on the entries in the FSK group box. 13) Click on the ENABLE (0x08) checkbox. 14)When DATAIN is 0, the low frequency is the carrier frequency in the spectrum analyzer. When DATAIN is 1, the high frequency is the carrier frequency in the spectrum analyzer. Toggle DATAIN and observe the frequency shift on the spectrum analyzer for the low and high values. Additional Evaluation: 15) For efficiency measurements, take the shunt off pins 9-10 of jumper JU12 and place an ammeter between pins 9-10 on JU12. Set VDD to 2.7V by adjusting R30. 16) Connect a power meter to RFOUT. Measure the output power and supply current. 17) The total efficiency is calculated by the following equation: Efficiency = 10 (POUT /10) I xV For example, if POUT is equal to +9.2dBm, the supply current is 12.2mA, the supply voltage is 2.7V, and the efficiency is approximately 25%. Maxim Integrated MAX7057 Evaluation Kit Evaluates: MAX7057 Table 1. Control Side Jumper Table (J1, JU1–JU12) JUMPER J1 JU1 JU2 JU3 JU4 JU5 JU6 JU7 JU8 JU9 JU10 JU11 JU12 *Default position. Maxim Integrated SHUNT POSITION DESCRIPTION 1-2 VDUT (IC) powered by the battery. 3-4 VDUT powered by the USB. Do not use this setting for the IC. 5-6 VDUT powered by an external supply. Apply the external voltage between the VEXT and GND_ test points. 7-8* VDUT powered by an adjustable on-board regulator. Change the resistance on potentiometer R30 to the required DUT supply. 1-2 Connects the external supply to the REG supply. 2-3* Connects the USB supply to the REG supply. 1-2* Microcontroller supply comes from the REG supply. 2-3 Microcontroller supply comes from the battery. Installation of battery holders is required. 1-2* Selects the AAA battery holder for the VBAT supply. 2-3 Selects the 2032 battery holder for the VBAT supply. 1-2 Sets the core microcontroller supply (VMICRO) to VLO (2V typ). 2-3* Sets the core microcontroller supply (VMICRO) to 2.5V. 1-2* Sets the logic microcontroller supply (VMICROL) to 3.3V. 2-3 Sets the logic microcontroller supply (VMICROL) to VMICRO. 1-2 Reserved for future use. 2-3* Connects the microcontroller oscillator to the on-board crystal. 1-2 Reserved for future use. 2-3* Connects the microcontroller oscillator to the on-board crystal. 1-2 Reserved for future use. 2-3* Connects the RTC oscillator to the on-board crystal (not installed). 1-2 Reserved for future use. 2-3* Connects the RTC oscillator to the on-board crystal (not installed). Closed GPO2 connects to the DUT through level translators. Open* GPO2 does not connect to the DUT. Closed* Open Closed* GPO1 connects to the DUT GPO through level translators. GPO1 does not connect to the DUT. See Table 2. 5 MAX7057 Evaluation Kit Evaluates: MAX7057 Table 2. JU12 Jumper Table JU12 PINS SHUNT POSITION 1-2 Closed* Don’t care. 3-4 Closed* Don’t care. 5-6 Closed* Don’t care. 7-8 Closed* Don’t care. Closed* VDD supply on the IC side is powered by the VDUT supply on the control side. 9-10 DESCRIPTION Open Externally power the VDD supply on the IC side by applying a voltage between the VDD test point (TP29) and the GND test point (TP31). Only open for current measurements (see step 15 in the Additional Evaluation section). Closed* Connects the GPO signal from the IC to the on-board microcontroller. The GPO signal can be monitored on TP15. Open The GPO signal is not connected to the on-board microcontroller. The GPO signal can be monitored by an external microcontroller on the GPO test point TP15 without interference loading from the on-board microcontroller. 11-12 13-14 Closed* Don’t care. 15-16 Closed* Don’t care. Don’t care. 17-18 Closed* 19-20 Closed* Don’t care. 21-22 Closed* Don’t care. Closed* 23-24 Open Closed* 25-26 Open Closed* 27-28 Open Closed* 29-30 Open Closed* 31-32 Open 33-34 Connects the on-board CS to the IC. CS can be monitored on TP21. Does not connect the on-board CS to the IC. When using external SPIK, remove this jumper and apply the CS signal to TP21. Connects the on-board SDI to the IC. SDI can be monitored on TP22. Does not connect the on-board SDI to the IC. When using external SPI, remove this jumper and apply the SDI signal to TP22. Connects the on-board SCLK to the IC. SCLK can be monitored on TP23. Does not connect the on-board SCLK to the IC. When using external SPI, remove this jumper and apply the SCLK signal to TP23. Connects the on-board enable signal (EN) to the IC. EN can be monitored on TP24. Does not connect the on-board EN signal to the IC. When using an external signal for enable, remove this jumper and apply the EN signal to TP24. Connects the on-board transmitter data signal (DIN) to the IC. DIN can be monitored on TP25. Does not connect the on-board transmitter data signal to the IC. When using an external signal for transmitter data remove this jumper and apply the DIN signal to TP25. Closed* Don’t care. Closed* Connects the microcontroller to the on-board SDO from the IC. SDO can be monitored on TP27. SDO has shared functionality with GPO. 35-36 Open Does not connect the microcontroller to the SDO signal from the IC. When using external SPI, remove this jumper and connect TP27 to the MISO input. *Default position. SPI is a trademark of Motorola, Inc. 6 Maxim Integrated MAX7057 Evaluation Kit Evaluates: MAX7057 Table 3. DUT Side Jumper Table (JU31–JU34) JUMPER JU31 JU32 JU33 JU34 SHUNT POSITION DESCRIPTION 1-2* Connects DVDD to VDD. 2-3 Connects DVDD to TP37. Must apply an external voltage between TP36 and TP37 (GND) to power DVDD. 1-2 Connects AVDD to TP38. Must apply an external voltage between TP38 and TP39 (GND) to power AVDD. 2-3* Connects AVDD to VDD. 1-2 Connects PAVDD to TP40. Must apply an external voltage between TP40 and TP41 (GND) to power PAVDD. 2-3* Connects PAVDD to VDD. 1-2 Connects PAOUT to ROUT for ASK amplitude shaping in. 2-3* Connects PAOUT to PAVDD for ASK amplitude shaping out. *Default position. Layout Issues A properly designed PCB is essential for any RF/microwave circuit. Keep high-frequency input and output lines as short as possible to minimize losses and radiation. At high frequencies, trace lengths that are on the order of λ/10 or longer can act as antennas. Both parasitic inductance and capacitance are influential on circuit layouts and are best avoided by using short trace lengths. Generally, a 10-mil wide PCB trace 0.0625in above a ground plane with FR4 dielectric has about 19nH/in of inductance and about 1pF/in of capacitance. In the matching network, where the inductor is on the order of 22nH and a capacitor is on the order of 10pF, the proximity of the circuit to the IC has a strong influence on the effective component values. To reduce the parasitic inductance, use a solid ground or power plane below the signal traces. Also, use low-inductance connections to ground on all GND pins, and place decoupling capacitors close to all VDD connections. Detailed Description of Software The main window of the MAX7057 EV kit is shown in Figure 1. Main Control Tab The EV kit GUI is grouped by register addresses. Actions on the GUI perform write and read operations. Reads are automatically done after each write for verification. GPO is configured to SDO every time a read operation is Maxim Integrated done. GPO is set back to the user setting after the read operation. DATAIN and ENABLE The DATAIN and ENABLE registers each have a single bit that is ORed with a hardware control pin on the EV kit board. Clicking on the checkbox writes to the respective register bit (software control). Pressing the HW EN or HW DIN buttons on the GUI sends a digital control signal from the on-board microcontroller to the respective inputs on the IC (hardware control). For example, the ENABLE (0x08) checkbox represents the enable bit found in register 0x08. A digital control signal from the on-board microcontroller connects to the IC enable input and can be toggled by pressing the HW EN button. If using software control, drive the ENABLE input low and control the enable function by pressing the ENABLE (0x08) checkbox. To control the enable feature by hardware, keep the ENABLE (0x08) checkbox unchecked. DATAIN works similarly with the HW DIN input. Applying an External Signal To apply an external signal to ENABLE or DATAIN, the respective jumper must first be removed and the signal applied to the signal test point. For example, to apply an external signal to DIN, first uncheck the DATAIN (0x08) checkbox. Then remove the jumper from pins 31-32 of JU12 and apply the DIN signal to TP24. A complex pattern can be sent using the transmitter in this fashion. ENABLE works similarly. 7 MAX7057 Evaluation Kit Evaluates: MAX7057 ASK Carrier Frequency Programming To program the carrier frequency in ASK mode, enter the carrier frequency in megahertz in the Frequency edit box inside the Low Frequency (0x04, 0x05) group box. Only the low-frequency registers are used for programming the carrier frequency for ASK. The GUI greys the High Frequency (0x02, 0x03) group box and the FSK group box when ASK is selected. Every time the carrier frequency is changed, the FLOAD bit is written to without user intervention. The carrier frequency has a range-limited delta-sigma modulator. When the carrier frequency is outside that range, a label inside the group box indicates that the frequency is out of range. FSK Carrier Frequency Programming There are two ways to program the carrier frequencies in FSK mode. One method is to program the High Frequency and Low Frequency by typing in the values in the Frequency edit boxes. Every time the high and low frequencies change, the FLOAD bit is written without user intervention. FSK Group Box The FSK group box allows an easy way to program the high and low frequencies when operating in FSK mode. Enter the center fequency in MHz and the frequency deviation in kHz. The center frequency and deviation must be within the proper range of operation. Detailed Description of Hardware The MAX7057 EV kit provides a proven layout for the IC. On-board test points are included to monitor various signals (Table 4). Power Supply The IC operates from a 2.1V to 3.6V supply. The EV kit has several options to power off of the USB, or the user can externally supply a voltage to the control side or the DUT side. To power off of the USB supply, change the shunt on J1 on the control side. The shunt is in the 7-8 position by default. That position makes VDUT equal to VADJ. The user can monitor VADJ with a voltmeter and change potentiometer R30 resistance to adjust the voltage between a 2.1V to 3.6V range. Do not put the shunt on J1 in the 3-4 position because that sets VDUT equal to VBUS (5V), which exceeds the allowable supply voltage. The 1-2 position on J1 allows the VDUT to be powered from a battery. Battery holders (not populated) are required. External Voltage To apply an external voltage to the IC, the voltage must be applied on the control side between VEXT and GND-_. The shunt on jumper JU1 must be in the 5-6 position. Registers Tab The EV kit Registers tab (Figure 2) displays each register’s individual bit logic-level status. A data bit in bold indicates a logic-high, while a data bit not bolded indicates a logic-low. Clicking on the individual data bit toggles the bit and performs a write command. The new command is shown in the edit box at the right. Write commands can be written to the registers alternatively by typing a hex value in the edit box and pressing the Enter key on the keyboard. Advanced User Interface A console application is available for advanced users by clicking Options | Interface (Advanced Users) (Figure 3). The console application offers an alternative method to programming the IC. Every string on the console is a command. 8 Table 4. DUT-Side Signal Test Points TEST POINT NAME TP15 GPO TP21 CS SDI Chip-select for SPI. TP22 TP23 SCLK Serial clock for SPI. TP24 EN Hardware enable for the IC. TP25 DIN Hardware transmitter data for the IC. TP27 GPO Serial data out for SPI. DESCRIPTION GPO can act as the SDO for SPI communication or various other outputs. Use TP27 for SDO in SPI. Serial data in for SPI. Maxim Integrated MAX7057 Evaluation Kit Evaluates: MAX7057 Figure 1. MAX7057 EV Kit Software Main Control Panel Maxim Integrated 9 MAX7057 Evaluation Kit Evaluates: MAX7057 Figure 2. MAX7057 EV Kit Software Registers Panel 10 Maxim Integrated MAX7057 Evaluation Kit Evaluates: MAX7057 Figure 3. Advanced User Interface Window (Console Application) AVDD and PAVDD AVDD and PAVDD are powered by VDD by default. To apply an external voltage to AVDD, change the shunt on jumper JU32 to the 1-2 position and apply an external voltage on TP38. To apply an external voltage to PAVDD, change the shunt on jumper JU33 to the 1-2 position and apply an external voltage on TP40. Table 5. SPI Jumpers and Test Points JU12 PINS TEST POINT NAME 23-24 TP15 25-26 TP21 CS SDI 27-28 TP22 SCLK 35-36 TP23 GPO Maxim Integrated External SPI Remove the shunts from the SPI jumpers and apply the signals to the SPI test points. The SPI jumpers are located on jumper JU12. See Table 5 for descriptions. External Frequency Input For applications where an external frequency is desired over the crystal frequency, it is possible to apply an external frequency through REFIN. Resistor R2 is necessary (use 0I). The EV kit GUI assumes the crystal frequency is always 16MHz. Use the Advanced User Interface for different crystal frequencies. 11 MAX7057 Evaluation Kit Evaluates: MAX7057 Figure 4a. MAX7057 EV Kit Schematic (Sheet 1 of 5) 12 Maxim Integrated MAX7057 Evaluation Kit Evaluates: MAX7057 Figure 4b. MAX7057 EV Kit Schematic (Sheet 2 of 5) Maxim Integrated 13 MAX7057 Evaluation Kit Evaluates: MAX7057 Figure 4c. MAX7057 EV Kit Schematic (Sheet 3 of 5) 14 Maxim Integrated MAX7057 Evaluation Kit Evaluates: MAX7057 Figure 4d. MAX7057 EV Kit Schematic (Sheet 4 of 5) Maxim Integrated 15 MAX7057 Evaluation Kit Evaluates: MAX7057 Figure 4e. MAX7057 EV Kit Schematic (Sheet 5 of 5) 16 Maxim Integrated MAX7057 Evaluation Kit Evaluates: MAX7057 1.0’’ Figure 5. MAX7057 EV Kit Component Placement Guide—Component Side 1.0’’ Figure 6. MAX7057 EV Kit PCB Layout—Component Side Maxim Integrated 17 MAX7057 Evaluation Kit Evaluates: MAX7057 1.0’’ Figure 7. MAX7057 EV Kit PCB Layout—Solder Side 1.0’’ Figure 8. MAX7057 EV Kit Component Placement Guide—Solder Side 18 Maxim Integrated MAX7057 Evaluation Kit Evaluates: MAX7057 Revision History REVISION NUMBER REVISION DATE 0 5/10 DESCRIPTION Initial release PAGES CHANGED — Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. Maxim Integrated 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000 © 2010 Maxim Integrated Products, Inc. 19 Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.