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MAX2741 Datasheet(PDF) 2 Page - Maxim Integrated Products |
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MAX2741 Datasheet(HTML) 2 Page - Maxim Integrated Products |
2 / 7 page Detailed Description The MAX2741 EV kit simplifies evaluation of the MAX2741 GPS RF receiver front-end IC. It enables testing of the device’s RF performance and requires no additional sup- port circuitry. The EV kit’s signal inputs and outputs use SMA connectors to facilitate the connection of RF test equipment. In this section, detailed descriptions of the EV kit board as well as the control interface/software are given to facilitate better evaluation of the IC. Input/Output Ports The MAX2741 EV kit has one RF input port, two IF output ports, one IF input port, one reference clock input port, and a GPS IF output port: • RFIN (J2) is the GPS RF signal input port with SMA connector • 1st IFOUT is the output of the 1st stage • 2nd IFOUT is the output of the 2nd stage • 2nd IFIN is the input to the 2nd stage • REFCLK is the external reference clock input to the phase-locked loop • GPSIF is the digital output after the 3-bit analog-to- digital converter Measurement Configuration Important Notice: The EV kit board provides all neces- sary components to test the entire tuner as one receiver (RF input to the 2nd IF analog output) or to indepen- dently test the 1st stage (RF input to 1st IF output) and the 2nd stage (the 2nd IF input to the 2nd IF output). All the required passive components are provided and installed on the board. To test the entire tuner as one receiver, the user must disconnect the connections to the 1st IF output SMA and the 1st IF input SMA by removing C35, C36, C37, and C38. To test the 1st stage and the 2nd stage independently, the user must disconnect the connections to the pas- sive, interstage IF filter by removing R12, C39, C40, C41, C42, C44. Jumper Description There are eight jumpers on the MAX2741 EV kit. See Table 1. MAX2741 Evaluation Kit 2 _______________________________________________________________________________________ SUPPLIER PHONE FAX Alpha 360-647-2360 260-671-4936 ATC 949-583-9119 949-583-9213 Coilcraft 847-639-6400 847-639-1469 Kayama 219-489-1533 219-489-2261 Murata 770-436-1300 770-436-3030 Component Suppliers Note: Indicate you are using the MAX2741 when contacting these manufacturers. JUMPER STATE FUNCTION 1-2 Connect the VCC6 pin supply to VCC. J3 N.C. Connect the VCC6 pin to an external supply. 1-2 Connect the VCC1 pin to VCC. J4 N.C. Connect the VCC1 pin to an external supply. 1-2 Connect the VCC2 pin to VCC. J5 N.C. Connect the VCC2 pin to an external supply. 1-2 Connect the VCC3 pin to VCC. J6 N.C. Connect the VCC3 pin to an external supply. 1-2 Connect the VCC4 pin to VCC. J7 N.C. Connect the VCC4 pin to an external supply. 1-2 Connect the VCC5 pin to VCC. J8 N.C. Connect the VCC5 pin to an external supply. 1-2 Connect to VCC. J9 N.C. Connect an external supply. 1-2 Normal operation. 2-3 Shut down the MAX2741. JP1 N.C. Control the MAX2741 externally. Table 1. Jumper Functions Component List (continued) DESIGNATION QTY DESCRIPTION T1, T2, T3 3 Balun transformers, surface-mount TOKO 617DB-1675 TP1, TP2 0 Test points, not installed U1 1 GPS downconverter Maxim MAX2741ETI U2, U3 2 Hex buffers/drivers with open drain, 14-pin SOP Texas Instruments SN74LV07ADR U4 1 Ultra-low-noise, high PSRR, low-dropout linear regulator, SC70 Maxim MAX8510EXK29-T Y1 1 19.2MHz voltage-controlled TCXO KSS/KYOCERA VC-TCXO-208C5-19P2 |
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Similar Description - MAX2741 |
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