U2795B TELEFUNKEN Semiconductors 2.5-GHz Double Balanced Mixer Description U2795B is a 2.5-GHz mixer for WLAN and RF telecommunications equipment, e.g., DECT and PCN, built with TELEFUNKEN’s 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 due to few external component D Single-ended output, no balun required D Standard independent product D 3-V operation reduces the battery count and saves (no balun) requirements D Single-ended input for RF and LO space D Exellent isolation characteristics D Power down mode D IP3 and compression point programmable D 2.5-GHz operating frequency D SO-8 package Block Diagram VS 2 RFi R2 3 P So 4 VR R1 VH VH LO i 7 Rev. A2: 08.06.1995 IFo 5 GND 6 Voltage regulator VS 1 PD 8 93 7811 e 1 (13) U2795B TELEFUNKEN Semiconductors Pin Description VS 1 8 PD RFI 2 7 LOi P 3 6 GND SO 4 5 IFO 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 94 7890 e Functional Description Supply Voltage Current Consumption, IS The IC is designed for a supply voltage of 2.7 to 5.5 V. As the IC is internally stabilized, the performance of the circuit is nearly independent of the supply voltage. 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 4. Input Impedance Input impedance, ZRFi, is about 700 with an additional capacitive component. This condition provides the best noise figure in combination with a matching network. Power Down This feature provides an extension of battery life. If this function is not used, Pin 8 has to be connected to VS (Pin 1). 3. Order Intercept Point (IP3) Output Symmetry Voltage divider, RP / R1, determinates both the input and output intercept point, IIP3 and OIP3. If RP is infinity the IIP3 has the maximum of about – 4 dBm. The symmetry of the load current can be matched and so be optimized for a given load impedance. The IP3/RP characteristics are shown in figure 1 and 2. Output Impedance and Intercept Point Output impedance is shown in figure 9. Both low output impedance and a high intercept point are with reference to a high value of RP. 2 (13) Rev. A2: 08.06.1995 U2795B TELEFUNKEN Semiconductors Absolute Maximum Ratings Parameters Symbol VS VI Tj Tstg Value 6 0 to VS 125 – 40 to + 125 Unit V V °C °C SO 8 Symbol Rthja Value 175 Unit K/W Parameters Supply voltage range Pin 1 Ambient temperature range Symbol VS Tamb Value 2.7 to 5.5 – 40 to + 85 Unit V °C Supply voltage Input voltage Junction temperature Storage temperature range Pin 1 Pins 2, 3, 7 and 8 Thermal Resistance Parameters Junction ambient Operating Range Rev. A2: 08.06.1995 3 (13) U2795B TELEFUNKEN Semiconductors Electrical Characteristics R VS = 3 V, fLOi = 1 GHz, IF = 900 MHz, RF = 100 MHz, RP = , system impedance Zo = 50 W, Tamb = 25°C, RT = 56 W reference point Pin 6, unless otherwise specified Parameters Supply voltage range Typical supply current range 1 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 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 Third 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 Note 1: 4 (13) 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 ISRF-LO – 30 35 dBm dB ISLO-IF – 25 dBm ISIF-LO 30 dB CPo – 10 dBm ZRFi CPi IIP3 700Wk0.8pF – 14 –4 W dBm dBm PiLO –6 dBm VSWRLOi VSWRIFo <2 <2 NF 10 ISPD 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 Depending on RP Rev. A2: 08.06.1995 U2795B TELEFUNKEN Semiconductors –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 20 40 Rp ( kW ) 94 9237 Figure 1. IIP3 versus resistor Rp, IF: 900 MHz 60 80 100 Figure 3. Gain versus resistor Rp, LO: 1030 MHz, level –10 dBm; RF: 130 MHz, –30 dBm, RT = 56 W 0 12 10 8 –10 I s ( mA ) OIP3 ( dBm ) –5 –15 6 4 –20 2 –25 0 20 94 9236 40 60 Rp ( kW ) 80 Figure 2. OIP3 versus resistor Rp, IF: 900 MHz Rev. A2: 08.06.1995 0 100 0 94 9238 20 40 60 Rp ( kW ) 80 100 Figure 4. Supply current IS versus resistor Rp 5 (13) U2795B TELEFUNKEN Semiconductors 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 0 200 Figure 5. Gain versus IF output frequency, LO level: –6 dBm, RF: 130 MHz, –35 dBm; parameter: RF input termination 400 600 800 IF ( MHz ) 94 9241 Figure 7. Double sideband noise figure versus IF output frequency; LO: 1000 MHz, level 0 dBm; no RF input matching, RT left out 0 5 with RT = 56 W –2 4 –6 without RT –8 VSWR IIP3 ( dBm ) –4 –10 3 –12 –14 2 with RF input matching: Ls = 220 nH, Cp = 4.7 pF –16 –18 0 94 9240 500 1000 1500 2000 1 100 2500 IF ( MHz ) 95 9652 Figure 6. IIP3 versus IF output frequency, LO level: –6 dBm; RF: 130 MHz / 130.1 MHz, –35 dBm; parameter: RF input termination 6 (13) 280 460 640 820 1000 IF Frequency ( MHz ) R Figure 8. Typical VSWR frequency response of the IF output, RP = Rev. A2: 08.06.1995 U2795B TELEFUNKEN Semiconductors j 0.5j 2j 0.2j 5j ÁÁ ÁÁ 0 0.2 ÁÁ Á ÁÁ Á 0.5 1 Á Á 2 Á Á 1 5 –0.2j –5j –0.5j –2j 94 9473 –j R Figure 9. Typical Impedance of the output versus RP at frequency fIFo = 900 MHz / 22 kW / 10 kW / 8.2 kW / 5.6 kW markers (from left to right): RP = Rev. A2: 08.06.1995 7 (13) U2795B TELEFUNKEN Semiconductors j 0.5j 2j 0.2j 5j ÁÁ ÁÁ ÁÁ ÁÁ ÁÁ ÁÁ 0 0.2 0.5 1 Á Á Á Á 2 1 5 –0.2j –5j –0.5j –2j 95 9651 –j Figure 10. Typical S11 frequency response of the IF output, RP = IF frequency from 100 MHz to 1000 MHz, marker: 900 MHz 8 (13) R, Rev. A2: 08.06.1995 U2795B TELEFUNKEN Semiconductors j 0.5j 2j 5j 0.2j ÁÁ ÁÁ 0 0.2 ÁÁ Á ÁÁ Á 0.5 1 Á Á Á Á 2 1 5 –0.2j –5j –0.5j –2j 95 9653 –j R Figure 11. Typical S11 frequency response of the RF intput, RP = , RT = RF frequency from 100 MHz to 1000 MHz, marker: 900 MHz Rev. A2: 08.06.1995 R 9 (13) U2795B TELEFUNKEN Semiconductors j 0.5j 2j 0.2j 5j ÁÁ ÁÁ ÁÁ ÁÁ ÁÁ ÁÁ 0 0.2 0.5 1 Á Á Á Á 2 1 5 –0.2j –5j –0.5j –2j 95 9654 –j Figure 12. Typical S11 frequency response of the LO intput, RP = LO frequency from 100 MHz to 1000 MHz, marker: 900 MHz 10 (13) R, Rev. A2: 08.06.1995 U2795B TELEFUNKEN Semiconductors Application Circuit (Evaluation Board) 94 8512 Application 94 8511 C1 VS 8 2 7 RP 3 C6 C3 PD C5 C2 RF U2795 B RT C7 1 LO 6 C4 4 5 IF RSO RI Rev. A2: 08.06.1995 11 (13) U2795B TELEFUNKEN Semiconductors t Part List C1 C2, C3, C4, C5, C6, C7 *RP *RSO RT Application Board 10 nF 100 pF 50- Microstrip 68 optional 56 With the part list values, the PD settling time is 20 s. Using other values, time requirements in burst-mode appli- cations have to be considered. Values of RSO and RP depending on the input and output condition requirements. For RSO 68 is recommended. With the optional RI the intercept and compression point can be slightly increased; values between 500 and 1 k are suitable. Please note that such modification will also increase the supply current. Ordering Information Extended Type Number U2795B-FP Package SO 8 95 9697 Dimensions in mm Package: SO 8 94 8862 12 (13) Rev. A2: 08.06.1995 TELEFUNKEN Semiconductors U2795B Ozone Depleting Substances Policy Statement It is the policy of TEMIC TELEFUNKEN microelectronic 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 TELEFUNKEN microelectronic GmbH semiconductor division 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 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 products for any unintended or unauthorized application, the buyer shall indemnify TEMIC 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 TELEFUNKEN microelectronic GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany Telephone: 49 ( 0 ) 7131 67 2831, Fax number: 49 ( 0 ) 7131 67 2423 Rev. A2: 08.06.1995 13 (13)