Additional Information: Wireless Product Line Page Quick View Data Sheet for the MAX2307 Applications Technical Support The MAX2307 is an integrated RF upconverter-driver in an ultra-small 3 x 4 UCSP package (1.5mm x 2.0mm). Although the MAX2307 was originally characterized for Japanese CDMA, this application demonstrates its performance when tuned for US CDMA transmit frequencies between 824MHz to 849MHz. With an IF frequency of 130.38MHz, the MAX2307 delivers +3dBm of output power over the 824 to 849MHz frequency range while exceeding ACPR requirements by several dB. Current consumption at +3dBm is 30mA from a supply voltage of +3.0V. A low-power logic-controlled shutdown allows supply current to be reduced to under 1mA. A few component changes are required to the MAX2307 EV kit to tune it for an IF frequency of 130.38MHz, and the RF frequency range of 824 to 849MHz. See Figure 1 for the schematic and Table 1 for the component description. Figure 1. The MAX2307 for US CDMA with 130MHz IF. Table 1. The MAX2307 for US CDMA with 130MHz IF Designation Quantity Description C1, C4, C6, C11, C13 5 100pF 5% ceramic capacitors (0402) Murata GRM36C0G101J050 C15 2 Not installed C16 1 3.3pF ceramic capacitor (0402) Murata GRM36C0G3R3B050 C3 1 4.7µF A Case 10V AVXTAJA475M010 C2, C7, C12, C14 4 0.01µF 10% ceramic capacitors (0402) Murata GRM36X7R103K016 C8 1 3.3pF ±0.1pF ceramic capacitor (0402) Murata GRM36C0G3R3B050 C9, C10 2 10pF ±0.25pF ceramic capacitor (0402) Murata GRM36C0G100C050 L1, L2 2 6.8nH inductors (0402) Murata LQG10A6N8S00 L3 1 180nH inductor (0603) Coilcraft 0603CS-18XJBC L4 1 7.5nH inductor (0402) Murata LQP10A7N5B00 R1, R2 2 10kΩ 5% resistors (0402) T1 1 Balun transformer (B5F type) Toko 458DB-1011 RF_OUT, LOIN, IFIN 3 SMA connectors (PC-edge-mount) EF Johnson 142-0701-801 or Digi-Key J502-ND JU1, JU2 2 3-pin headers VCC, GND, VGC 3 Test points Mouser 151-203 U1 1 MAX2307EBC (UCSP-4x3L) None 1 MAX2307 PC board None 1 MAX2307 data sheet None 1 MAX2307 EV Kit data sheet Figures 2 and 3 demonstrate the gain and ACPR performance of the device over frequency. Figure 2. The MAX2307 gain vs. frequency. Figure 3. The MAX2307 ACPR vs. frequency. Figure 4 demonstrates the output power and ACPR performance vs. gain control voltage. Figure 4. The MAX2307 output power and ACPR vs. gain control voltage. Figure 5 demonstrates output power and ACPR performance vs. input power. Figure 5. The MAX2307 output power and ACPR vs. input power. Figure 6 demonstrates supply current vs output power. Figure 6. The MAX2307 supply current vs. output power. Additionally the MAX2307 provides 18dBc of image-suppression, relative to the desired tone, and -36dBc of carrier suppression. See the MAX2307 data sheet and MAX2307 EV kit data sheet for further performance information and pcb layout information. Related Parts   APP 919: May 01, 2002 MAX2307 Low-Power, Cellular Upconverter-Driver Full Data Sheet (PDF, 216kB) Automatic Updates Would you like to be automatically notified when new application notes are published in your areas of interest? Sign up for EE-Mail™. We Want Your Feedback!   Download, PDF Format (79kB)  AN919, AN 919, APP919, Appnote919, Appnote 919