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MAX2363W Datasheet(PDF) 8 Page - Maxim Integrated Products |
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MAX2363W Datasheet(HTML) 8 Page - Maxim Integrated Products |
8 / 13 page IFLO The IFLO output port provides an output signal that is either the IF VCO frequency or the VCO frequency divided by 2, depending on the setting of the BUF_DIV control bit. It can be enabled by setting the BUF_EN bit to 1 in the OPCTRL register. TANK BYP The tank bypass port is provided to drive the high-band tank with an external LO source. The VCO_BYPASS bit should be set to 1 to enable this port. Replace C25 with 0.01µF AC-coupling capacitor; replace R36 and R70 with 0 Ω resistors; and remove R38, C12, C24, L10, D1, and D2. REF REF is the reference frequency input to the RF and IF PLL. The REF port is AC-coupled. Make sure the refer- ence signal has low phase noise. LOH LOH is the high-band RF LO input port. The EV kit is shipped with this port disconnected. To use this port with an external signal source, disconnect the PCS VCO by removing C39 and placing it at location C66. LOL LOL is the low-band RF LO input port. The EV kit is shipped with this port disconnected. To use this port with an external signal source, disconnect the cellular VCO by removing C40 and placing it at location C65. RFH1 RFH1 is the PCS lower half-band PA driver output. Refer to Table 9 in the MAX2361/MAX2363/MAX2365 data sheet for the mode description. RFL RFL is the cellular band PA driver output. This port is active in cellular and FM modes. Refer to Table 9 in the MAX2361/MAX2363/MAX2365 data sheet for the mode description. RFH0 RFH0 is the PCS upper half-band PA driver output. Refer to Table 9 in the MAX2361/MAX2363/MAX2365 data sheet for the mode description. IFINH and IFOUTH For cascade evaluation, an on-board filter is connected between IFOUTH and IFINH. Select these ports by pro- gramming IF_SEL to 1. IFINH and IFOUTH are not con- nected to SMA connectors on the EV kit IFINL and IFOUTL For cascade evaluation, an on-board filter is connected between IFOUTL and IFINL. Select these ports by pro- gramming IF_SEL to 0. For individual IF modulator and upconverter evaluation, remove R44, R49, R55, R58, and install R25, R33, R34, and R39 with 0 Ω resistors. This connects the IFINL_ and IFOUTL_ pins to the IFINL and IFOUTL SMA connectors. The matching networks are tuned to 130MHz. VBAT/VREG VBAT supplies VCC to the PA driver circuitry. This may be an unregulated battery voltage. The PA drivers are open collector. Jumpers are provided to enable current mea- surement to each functional block of the IC (Table 3). VREG is connected to the output of the U2 regulator on the EV Kit. Do not connect an external supply voltage to VREG header. RBIAS When resistor R73 is stuffed (typically 10k Ω), a bias volt- age may be applied to the RBIAS header to adjust the PA driver bias current. Internal to the IC, pin 12 is set to 600mV. Output linearity or efficiency may be improved by adjusting PA driver current. Layout Considerations The MAX2361/MAX2363W EV kits can serve as guides for your board layout. Keep PC board trace lengths as JUMPER NO. ASSOCIATED FUNCTIONAL BLOCK JU1 VCC for VCC DRIVER JU2 External cellular VCO JU3 External PCS VCO JU4 VGC jumper JU6 PA predrivers VCC JU7 RF mixer VCC JU8 IF modulator VCC JU9 Digital VCC JU10 RF charge pump VCC MAX2361/MAX2363W Evaluation Kits 8 _______________________________________________________________________________________ Table 3. Jumpers Table 2. Baseband Termination Resistor Values MODULATION I/Q DIFFERENTIAL VOLTAGE AT I_/Q_ INPUTS (mVp-p) R9, R18 ( Ω)* Sinusoidal 600 75 CDMAONE 415 39 3GPP WCDMA 600 24 TDMA 600 22 *Set R9 and R18 for different I/Q input-source level (baseband waveform taken from the back panel of Agilent’s E4433B signal generator). |
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Similar Description - MAX2363W |
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