U2795B 2.5-GHz Double-Balanced Mixer Description The U2795B is a 2.5-GHz mixer for WLAN and RF telecommunications equipment, e.g., DECT and PCN. The IC is manufactured using TEMIC Semiconductors' advanced bipolar technology. A double-balanced approach was chosen to assure good isolation characteristics and a minimum of spurious products. The input and output are single ended, and their characteristics are programmable. No output transformer or balun is required. Features Benefits D Supply-voltage range: 2.7 to 5.5 V D Reduced system costs as only few external component Electrostatic sensitive device. Observe precautions for handling. (no balun) are required D Single-ended output, no balun required D Stand-alone product D 3-V operation reduces battery count and saves space D Single-ended input for RF and LO D Excellent isolation characteristics D Power-down mode D IP3 and compression point programmable D 2.5-GHz operating frequency Block Diagram VS 2 R2 RFi 3 5 IFo 4 So P VR R1 VH VH 7 LO i Voltage regulator 6 GND 8 PD 1 VS 93 7811 e Figure 1. Ordering Information Extended Type Number U2795B-CFP U2795B-CFPG3 Rev. A3, 20-May-99 Package SO8 SO8 Remarks Tube Taped and reeled 1 (10) U2795B Pin Description VS 1 8 PD RFI 2 7 LOi P 3 6 GND SO 4 5 IFO 94 7890 e Pin 1 2 3 4 5 6 7 8 Symbol VS RFi P SO IFO GND LOi PD Function Supply voltage RF input Progamming port IP3, CP Output symmetry IF output Ground LO input Power down Figure 2. Pinning Functional Description Supply Voltage Output Impedance and Intercept Point The IC is designed for a supply-voltage range of 2.7 V to 5.5 V. As the IC is internally stabilized, the performance of the circuit is nearly independent of the supply voltage. The output impedance is shown in figure 11. Both low output impedance and a high intercept point are defined to a high value of RP. Current Consumption, IS Input Impedance The input impedance, ZRFi, is about 700 W with an additional capacitive component. This condition provides the best noise figure in combination with a matching network. 3rd Order Intercept Point (IP3) The voltage divider, RP / R1, determinates both the input and output intercept point, IIP3 and OIP3. If the value of RP is infinite, the maximum value of IIP3 reachs about - 4 dBm. The IP3/RP characteristics are shown in figure 3 and 4. Depending on the chosen input and output conditions of the IC, the current consumption, IS, is between 4 mA and 10 mA. The current consumption in dependence of Rp is shown in figure 6. Power Down This feature provides extended battery lifetime. If this function is not used, Pin 8 has to be connected to VS (Pin 1). Output Symmetry The symmetry of the load current can be matched and thus optimized for a given load impedance. Absolute Maximum Ratings Parameters Supply voltage Input voltage Junction temperature Storage-temperature range Pin 1 Pins 2, 3, 7 and 8 Symbol VS VI Tj Tstg Value 6 0 to VS 125 - 40 to + 125 Unit V V C C Symbol Rthja Value 175 Unit K/W Symbol VS Tamb Value 2.7 to 5.5 - 40 to + 85 Unit V C Thermal Resistance Parameters Junction ambient SO 8 Operating Range Parameters Supply-voltage range Ambient-temperature range 2 (10) Pin 1 Rev. A3, 20-May-99 U2795B Electrical Characteristics R VS = 3 V, fLOi = 1 GHz, IF = 900 MHz, RF = 100 MHz, RP = , system impedance Zo = 50 W, Tamb = 25C, RT = 56 W reference point Pin 6, unless otherwise specified Parameters Supply voltage range Typical supply-current range Maximum supply current Conversion power gain Operating frequencies RFi frequency LOi frequency IFo frequency Isolation LO spurious at RFi RFi to LOi LO spurious at IFo Test Conditions / Pin Pin 1 Pin 1, depending on RP Pin 1 RL = 50 W, RT = RL = 50 W, RT = 56 W IS PGC PGC Pin 2 Pin 7 Pin 5 RFi fLOi fIFo R Pin 7 to 2 PiLO = -10 to 0 dBm Pin 2 to 7 PiRF = -25 dBm Pin 7 to 5, PiLO = - 10 to 0 dBm Pin 5 to 7 IFo to LOi Output (IF) Output compression point Pin 5 Input (RF) Input impedance Pin 2 Input compression point Pin 2 3rd-order input Pin 2 intercept point Input (LO) LO level Pin 7 Voltage standing wave ratio (VSWR) Input LO Pin 7 Output IF Pin 4 Noise performance Noise figure PiLO = 0 dBm, RT = Power-down mode Supply current Pin 1 VPD < 0.5 V Pin 1 VPD = 0 V Power-down voltage "Power ON" Pin 8 VS = 3.5 to 5.5 V VS = 2.7 to 3.5 V "Power DOWN" Pin 8 Power-down current Pin 8 Power ON Power DOWN Settling time Pin 8 to 5 R Rev. A3, 20-May-99 Symbol VS IS Min. 2.7 4 Typ. Max. 5.5 11 Unit V mA 13 mA dB dB 2500 2500 2500 MHz MHz MHz 9 4 10 50 50 ISLO-RF - 30 dBm ISRF-LO 35 dB ISLO-IF - 25 dBm ISIF-LO 30 dB CPo - 10 dBm ZRFi CPi IIP3 700k0.8 - 14 -4 PiLO -6 VSWRLOi VSWRIFo <2 <2 NF 10 ISPD WkpF dBm dBm dBm dB 30 <5 VPON VPDN IPON IPDN tsPD VS - 0.5 VS VS + 0.5 VS + 0.5 1 0.15 <5 <30 mA V V V mA mA ms 3 (10) U2795B -4 3 -5 -1 Gain ( dB ) IIP3 ( dBm ) -6 -7 -5 -8 -9 -9 -13 -10 0 20 94 9235 40 60 Rp ( kW ) 80 100 0 Figure 3. IIP3 versus resistor Rp, IF: 900 MHz 40 60 Rp ( kW ) 80 100 Figure 5. Gain versus resistor Rp, LO: 1030 MHz, level -10 dBm; RF: 130 MHz, -30 dBm, RT = 56 W 0 12 10 -5 OIP3 ( dBm ) 20 94 9237 8 I s ( mA ) -10 -15 6 4 -20 2 -25 0 0 94 9236 20 40 60 Rp ( kW ) 80 100 Figure 4. OIP3 versus resistor Rp, IF: 900 MHz 4 (10) 0 94 9238 20 40 60 Rp ( kW ) 80 100 Figure 6. Supply current IS versus resistor Rp Rev. A3, 20-May-99 U2795B 18 12 with RF input matching: Ls = 220nH, Cp = 4.7pF 10 8 without RT 10 NF ( dB ) Gain ( dB ) 14 6 6 4 2 2 with RT = 56 W -2 0 0 500 1000 1500 2000 2500 IF ( MHz ) 94 9239 0 Figure 7. Gain versus IF output frequency, LO level: -6 dBm, RF: 130 MHz, -35 dBm; parameter: RF input termination 400 600 800 IF ( MHz ) Figure 9. Double sideband noise figure versus IF output frequency; LO: 1000 MHz, level 0 dBm; no RF input matching, RT left out 5 0 with RT = 56 W -2 -4 4 -6 without RT VSWR IIP3 ( dBm ) 200 94 9241 -8 -10 3 -12 2 -14 with RF input matching: Ls = 220 nH, Cp = 4.7 pF -16 -18 0 500 94 9240 1000 1500 2000 IF ( MHz ) Figure 8. IIP3 versus IF output frequency, LO level: -6 dBm; RF: 130 MHz / 130.1 MHz, -35 dBm; parameter: RF input termination Rev. A3, 20-May-99 1 100 2500 95 9652 280 460 640 820 1000 IF Frequency ( MHz ) R Figure 10. Typical VSWR frequency response of the IF output, RP = 5 (10) U2795B j 0.5j 2j 0.2j 5j AA AA A AA AA 0 0.2 0.5 1 2 1 5 -0.2j -5j -0.5j -2j 94 9473 -j R Figure 11. Typical impedance of the output versus RP at frequency fIFo = 900 MHz markers (from left to right): RP = / 22 kW / 10 kW / 8.2 kW / 5.6 kW j 0.5j 2j 0.2j 5j AA AA A A A 0 0.2 0.5 1 2 1 5 -0.2j -5j -0.5j 95 9651 -2j -j Figure 12. Typical S11 frequency response of the IF output, RP = IF frequency from 100 MHz to 1000 MHz, marker: 900 MHz 6 (10) R, Rev. A3, 20-May-99 U2795B j 0.5j 2j 0.2j 5j AA AA A AA AA 0 0.2 0.5 1 2 1 5 -0.2j -5j -0.5j -2j 95 9653 -j R Figure 13. Typical S11 frequency response of the RF intput, RP = , RT = RF frequency from 100 MHz to 1000 MHz, marker: 900 MHz R j 0.5j 2j 0.2j 5j AA AA A AA AA AA AA A AA AA 0 0.2 0.5 1 2 -0.2j -5j -0.5j 95 9654 -2j -j Figure 14. Typical S11 frequency response of the LO intput, RP = LO frequency from 100 MHz to 1000 MHz, marker: 900 MHz Rev. A3, 20-May-99 1 5 R, 7 (10) U2795B Application C1 C7 VS RF 8 2 7 RP 3 LO 6 C4 C6 C3 PD C5 C2 U2795B RT 1 4 5 IF RSO 94 8511 RI Figure 15. If the part-list values are used, the PD settling time is C1 10 nF C2, C3, C4, C5, C6, C7 100 pF *RP applications have to be considered. The values of RSO and RP depend on the input and output condition requirements. For RSO, 68 W is recommended. 50-W Microstrip By means of the optional RI, the intercept and compression point can be slightly increased; values between 500 W and 1 kW are suitable. Please note that such modification will also increase the supply current. 68 W *RSO optional 56 W RT t 20 ms. Using other values, time requirements in burst-mode Part List Application Circuit (Evaluation Board) 95 9697 94 8512 Figure 16. 8 (10) Figure 17. Rev. A3, 20-May-99 U2795B Package Information Package SO8 Dimensions in mm 5.2 4.8 5.00 4.85 3.7 1.4 0.25 0.10 0.4 1.27 6.15 5.85 3.81 8 0.2 3.8 5 technical drawings according to DIN specifications 13034 1 Rev. A3, 20-May-99 4 9 (10) U2795B Ozone Depleting Substances Policy Statement It is the policy of TEMIC Semiconductor GmbH to 1. Meet all present and future national and international statutory requirements. 2. Regularly and continuously improve the performance of our products, processes, distribution and operating systems with respect to their impact on the health and safety of our employees and the public, as well as their impact on the environment. It is particular concern to control or eliminate releases of those substances into the atmosphere which are known as ozone depleting substances ( ODSs). The Montreal Protocol ( 1987) and its London Amendments ( 1990) intend to severely restrict the use of ODSs and forbid their use within the next ten years. Various national and international initiatives are pressing for an earlier ban on these substances. TEMIC Semiconductor GmbH has been able to use its policy of continuous improvements to eliminate the use of ODSs listed in the following documents. 1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments respectively 2 . Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental Protection Agency ( EPA) in the USA 3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C ( transitional substances ) respectively. TEMIC Semiconductor GmbH can certify that our semiconductors are not manufactured with ozone depleting substances and do not contain such substances. We reserve the right to make changes to improve technical design and may do so without further notice. Parameters can vary in different applications. All operating parameters must be validated for each customer application by the customer. Should the buyer use TEMIC Semiconductors products for any unintended or unauthorized application, the buyer shall indemnify TEMIC Semiconductors against all claims, costs, damages, and expenses, arising out of, directly or indirectly, any claim of personal damage, injury or death associated with such unintended or unauthorized use. TEMIC Semiconductor GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany Telephone: 49 ( 0 ) 7131 67 2594, Fax number: 49 ( 0 ) 7131 67 2423 10 (10) Rev. A3, 20-May-99