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| T0785 800-1000 MHz High Linearity SiGe Active Transmit Mixer Description The T0785 is a high linearity active mixer which is manufactured using Atmel Wireless & Microcontrollers' advanced Silicon-Germanium technology. This mixer features a frequency range of 800 to 1000 MHz. It operates from a single 5 V supply and provides 7.5 dB of conversion gain while requiring only 0 dBm input to the integrated LO driver. An IF amplifier is also included. The T0785 incorporates internal matching on each RF, IF and LO port to enhance ease of use and to reduce the external components required. The IF and LO inputs can be driven differentially or single ended. Electrostatic sensitive device. Observe precautions for handling. Features * Active mixer with conversion gain * No necessary external LO driver * Low LO drive level required * IF and LO ports may be driven single-ended * Single 5 V supply voltage * Broadband resistive 50 impedances on all three ports Applications * Digital communication systems * 800-1000 MHz transceivers for base stations Block Diagram IFP 8 IFN 12 9 5 RFP LOP 13 LON 4 RFN Ordering Information Extended Type Number T0785 Package SSOP16 Remarks Rev. A1, 15-Aug-01 1 (8) Preliminary Information T0785 Pin Description Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Symbol GND VCC GND RFN RFP GND VCC IFN IFP VCC GND LOP LON GND VCC GND Ground 5 V power supply Ground RF negative output RF positive output Ground 5 V power supply IF negative input IF positive input 5 V power supply Ground Local oscillator, positive input Local oscillator, negative input Ground 5 V power supply Ground GND VCC GND RFN RFP GND VCC IFN 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 GND VCC GND LON LOP GND VCC IFP Pinning Function Absolute Maximum Ratings All voltages are referred to GND. Parameters Supply voltage LO input IF input Operating temperature Storage temperature Symbol VCC LON, LOP IFN, IFP TOP Tstg -40 -65 Min. Typ. 5.0 Max. 6.0 10 15 +85 +150 Unit V dBm dBm C C Thermal Resistance Parameters Junction ambient Symbol RthJA Value t.b.d. Unit K/W 2 (8) Rev. A1, 15-Aug-01 Preliminary Information T0785 Electrical Characteristics Test conditions: Vcc = +5 V, Tamb = +25C IF input: -20 dBm @ 200 MHz LO input: 0 dBm @ 740 MHz Parameters Test Conditions / Pins Symbol Min. Typ. Max. Unit AC Performance Frequency range IF frequency range Output IP3 Output P1dB Conversion gain SSB noise figure RF return loss LO return loss IF return loss LO drive -3 IF1 = IF2 = -20 dBm/tone f 800 10 200 17 2 7.5 10 14 14 14 0 3 1000 300 MHz MHz dBm dBm dB dB dB dB dB dBm fIF IP3 Isolation performance Leakage (LO-RF) Leakage (LO-IF) -35 -30 dBm dBm Miscellaneous Supply voltage Supply current VCC ICC 4.75 5 190 5.25 V mA Rev. A1, 15-Aug-01 3 (8) Preliminary Information T0785 Typical Device Performance Conversion Gain VCC = 5.0V, RF = 940MHz, IF = 200MHz 10 Return Loss at RF Input V CC = 5.0V 0 Return Loss (dB) -5 -10 -15 -20 -25 -30 800 850 900 950 1000 8 Gain (dB) 6 4 2 0 800 850 900 RF Frequency (MHz) 950 1000 RF Frequency (MHz) Figure 1. Conversion Gain VCC = 5.0 V, RF = 940 MHz, IF = 200 MHz Figure 2. Return Loss at RF Input VCC = 5.0 V Return Loss at LO Input VCC = 5.0V 0 Return Loss (dB) -4 -8 -12 -16 -20 500 0 Return Loss (dB) -10 -20 -30 -40 600 700 LO Frequency (MHz) 800 900 50 Return Loss at IF Input VCC = 5.0V 100 150 200 250 300 IF Frequency (MHz) Figure 3. Return Loss at LO Input VCC = 5.0 V Figure 4. Return Loss at IF Input VCC = 5.0 V 4 (8) Rev. A1, 15-Aug-01 Preliminary Information T0785 Demo Test Board Schematic 5V Lfil Vcc C3 IC1 1 2 3 4 5 6 7 8 C7 T2 16 15 14 13 12 11 10 9 C9 C1 C30 Vcc RFout J3 T9 C4 C5 Vcc C11 C12 T11 J4 LOin Vcc C20 T0785 Vcc C21 J5 IFin Bill of Material Component Designator IC1 J3, J4, J5 T9, T11 T2 Lfil C1, C3, C20, C21, C30 C7, C9 C4, C5 C11, C12 1:1 1:1 1 H 27 pF 100 pF 12 pF 18 pF Value Vendor Atmel Wireless & Microcontrollers Johnson Components Panasonic Mini-Circuits Part Number T0785 142-0701-851 EHF-FD1618 TC1-1 SiGe transmit mixer SMA connector, end launch with tab, for .062 inch thick board RF transformer IF transformer Inductor, 1210 footprint, min. 200 mA rating Capacitor, 0603 footprint Capacitor, 0603 footprint Capacitor, 0603 footprint Capacitor, 0603 footprint Description Rev. A1, 15-Aug-01 5 (8) Preliminary Information T0785 Demo Test Board (Fully Assembled PCB) 50.8 mm 2 1 C30 CON 50.8 mm Lfil J3 C4 T9 C5 C20 C7 C9 C3 IC1 C1 C11 T11 C12 C21 J4 T2 J5 Recommended Package Footprint 1.25 0.25 0.74 0.4 0.74 3.0 3.0 0.33 via 0.7 0.9 6.9 - Indicates metalization all units are in mm - vias connect pad to underlying ground plane Remark: Heatslug must be soldered to GND 6 (8) Rev. A1, 15-Aug-01 Preliminary Information T0785 Package Information SSOP16 7 (8) Rev. A1, 15-Aug-01 Preliminary Information T0785 Ozone Depleting Substances Policy Statement lt is the policy of Atmel Germany 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 systerns with respect to their impact on the health and safety of our employees and the public, as well as their impact on the environment. lt 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. Atmel Germany GmbH has been able to use its policy of continuous improvernents 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 1 and 11 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. Atmel Germany 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 Atmel Wireless & Microcontrollers products for any unintended or unauthorized application, the buyer shall indemnify Atmel Wireless & Microcontrollers 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. Data sheets can also be retrieved from the Internet: http://www.atmel-wm.com Atmel Germany GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany Telephone: 49 (0)7131 67 2594, Fax number: 49 (0)7131 67 2423 Rev. A1, 15-Aug-01 8 (8) |
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