WIRELESS COMMUNICATIONS DIVISION TQ5633 RF INPUT DATA SHEET VDD RF Amplifier Vdd RF IN GND LO IN IF Common Mode Tune Tune GND Mixer Vdd VDD IF out 3V PCS Band CDMA RFA/Mixer IC LO Input RF amplifier Control Features IF OUTPUT Small size: SOT23-8 Single 3V operation Low-current operation Product Description Gain Select The TQ5633 is a 3V, RF Amplifier/Mixer IC designed specifically for PCS band CDMA applications. It’s RF performance meets the requirements of products designed to the IS-95 standard. The TQ5633 is designed to be used with an IF frequency of 110MHz, and uses a balanced mixer to achieve ½ IF rejection. When used with the TQ3631 or TQ3632 (CDMA LNAs) it provides a complete CDMA receiver for 1900MHz phones. High IP3 performance The RF Amplifier/Mixer incorporates on-chip switches which determine two gain select states. The RF and LO input ports are internally matched to 50 Ω, greatly simplifying the design and keeping the number of external components to a minimum. The TQ5633 achieves good RF performance with low current consumption, supporting long standby times in portable applications. Coupled with the very small SOT23-8 package, the part is ideally suited for PCS band mobile phones. Electrical Specifications1 Parameter Min Typ Max 50 Ω RF and LO inputs Applications Wireless Local Loop PCS Micro-cell MHz Gain 16.0 dB Noise Figure 5.8 dB 3rd -0.5 dBm 23.0 mA DC supply Current 110MHz IF Frequency Units 1960 Order Intercept Excellent ½ IF rejection IS-95 CDMA Mobile Phones Frequency Input Few external components Note 1: Test Conditions: Vdd=2.8V, RF=1960MHz, LO=2070MHz, IF=110MHz, Ta=25C, LO input –4dBm, CDMA High Gain state. For additional information and latest specifications, see our website: www.triquint.com 1 TQ5633 Data Sheet Electrical Characteristics Parameter Conditions Min. Typ/Nom Max. Units RF Frequency PCS band 1930 1960 1990 MHz IF Frequency 100 110 130 MHz LO Frequency 2030 2070 2120 MHz 14.8 16.0 CDMA Mode-High Gain Gain Noise Figure 5.8 Input IP3 -1.5 ½ IF IIP2 Supply Current dB 6.7 dB -0.5 dBm 27 dBm 23.0 26.5 mA CDMA Mode-Low Gain Gain 5.8 7.0 dB Noise Figure 10.0 dB Input IP3 9.5 dBm ½ IF IIP2 32 dBm 18.5 mA Supply Current Supply Voltage 2.7 2.8 Note 1: Test Conditions: Vdd=2.8V, RF=1960MHz, LO=2070MHz, IF=110MHz, TC = 25° C, LO input –4dBm, unless otherwise specified. Note 2: Min/Max limits are at +25°C case temperature, unless otherwise specified. Absolute Maximum Ratings Parameter Value Units DC Power Supply 3.6 V Power Dissipation 500 mW Operating Temperature -30 to 85 C Storage Temperature -60 to 150 C Signal level on inputs/outputs +20 dBm Voltage to any non supply pin -0.5 to +0.5 V 2 For additional information and latest specifications, see our website: www.triquint.com 2.9 V TQ5633 Data Sheet Typical Performance, Note:HG Mode=High Gain Mode, LG Mode=Low Gain Mode Test Conditions, unless otherwise specified: Vdd=2.8V, Ta=25C, RF=1960MHz, LO=2070MHz, IF=110MHz, LO input=-4dBm Conversion Gain vs Frequency Conversion Gain vs. Vdd 18 16 16 14 Gain (dB) Gain (dB) 14 12 HG Mode LG Mode 10 HG Mode 12 LG Mode 10 8 8 6 1930 6 4 1940 1950 1960 1970 1980 2.7 1990 2.8 2.9 Frequency (MHz) Input IP3 vs. Vdd 9.5 IIP3 (dBm) IIP3 (dBm) 7.5 5.5 HG Mode LG Mode 3.5 1.5 7.5 HG Mode LG Mode 5.5 3.5 1.5 -0.5 1940 1950 1960 1970 1980 1990 2.7 2.8 2.9 Frequency (MHz) 3 3.1 3.2 Vdd (V) Noise Figure vs Frequency Half-IF Input IP2 vs. Vdd 11 40 10 35 9 IIP2 (dBm) Noise Figure (dB) 3.2 11.5 9.5 8 HG Mode LG Mode 7 30 HG Mode LG Mode 25 20 6 5 1930 3.1 Vdd (V) Input IP3 vs. Frequency -0.5 1930 3 15 1940 1950 1960 1970 Frequency (MHz) 1980 1990 2.6 2.7 2.8 2.9 3 3.1 3.2 3.3 Vdd (V) For additional information and latest specifications, see our website: www.triquint.com 3 TQ5633 Data Sheet Noise Figure vs. Vdd Input IP3 vs. LO Power 11 10 9 9 IIP3 (dBm) Noise Figure (dB) 11 HG Mode LG Mode 8 7 6 7 HG Mode 5 LG Mode 3 1 5 -1 2.7 2.8 2.9 3 3.1 3.2 -7 -6 -5 Vdd (V) -4 -3 -2 -1 LO Power (dBm) Idd vs. Vdd Half-IF Input IP2 vs. LO Power 40 30 28 35 IIP2 (dBm) Idd (mA) 26 24 22 30 25 HG Mode LG Mode 20 HG Mode LG Mode 18 20 16 15 2.7 2.8 2.9 3 3.1 3.2 -7 -6 Vdd (V) -5 -4 -3 -2 -1 LO Power (dBm) Conversion Gain vs. LO Power Noise Figure vs. LO Power 11 15 Noise Figure (dB) 10 Gain (dB) 13 HG Mode LG Mode 11 9 7 6 5 5 -6 -5 -4 -3 LO Power (dBm) -2 -1 HG Mode LG Mode 8 7 -7 4 9 -7 -6 For additional information and latest specifications, see our website: www.triquint.com -5 -4 -3 LO Power (dBm) -2 -1 TQ5633 Data Sheet Idd vs. LO Power Half-IF Input IP2 vs. Temperature 24 40 23 35 HG Mode LG Mode 21 20 IIP2 (dBm) Idd (mA) 22 19 18 30 25 HG Mode LG Mode 20 17 15 16 -7 -6 -5 -4 -3 -2 -30 -1 -10 Conversion Gain vs. Temperature 16 11 14 10 Gain (dB) Noise Figure (dB) 12 HG Mode LG Mode 8 6 4 7 6 0 4 30 60 -30 90 -10 10 30 50 70 90 Temperature (C) Temperature (C) Input IP3 vs. Temperature Idd vs. Temperature 28 11.5 26 9.5 24 7.5 22 5.5 Idd (mA) IIP3 (dBm) 90 HG Mode LG Mode 8 5 0 70 9 2 -30 50 Noise Figure vs. Temperature 18 10 30 Temperature (C) LO Power (dBm) 12 10 HG Mode LG Mode 3.5 20 18 16 HG Mode LG Mode 14 1.5 12 -0.5 10 -30 -10 10 30 50 Temperature (C) 70 90 -30 -10 10 30 50 70 90 Temperature (C) For additional information and latest specifications, see our website: www.triquint.com 5 TQ5633 Data Sheet Application/Test Circuit RF INPUT R3 RF IN VDD RF Amplifier Vdd C5 C6 LO IN GND IF Common Mode Tune C3 Tune GND VDD IF out LO Input R1 Control 2 Gain Select C7 L2 L3 Mixer Vdd R4 C9 C4 R5 Vdd IFA C8 IF OUTPUT Bill of Material for TQ5633 RF AMP/Mixer Component Reference Designator Part Number Receiver IC U1 TQ5633 Capacitor C3 3.3pF 0603 Capacitor C4, C6, C8 1000pF 0603 Capacitor C5, C7 5.6pF 0603 Capacitor C9 10pF 0603 Resistor R1 2.2KΩ 0603 Resistor R3, R4, R5 3.3Ω 0603 Inductor L2 470nH 0805 Toko Inductor L3 220nH 0805 Toko 6 Value For additional information and latest specifications, see our website: www.triquint.com Size Manufacturer SOT23-8 TriQuint Semiconductor TQ5633 Data Sheet TQ5631 Product Description The TQ5633 is a balanced mixer down converter which RF Input F1 1 Vdd RFA C6 LO Input C5 integrates the gain step functions required for PCS CDMA handsets. The device requires minimal components and mates with the TQ3631 or TQ3632 series of high band LNAs. The TQ5633 was designed specifically for the needs of systems using a low IF in the range of 85MHz to 130MHz, as it provides a very high IP2. Some other outstanding features are 50ohm matches at the RF input and LO input in both modes. R3 8 2 7 R1 C2, Gain Select C7 C3 Vdd Mixer 3 6 4 5 L2 R4 L3 C4 TQ5633 Vdd R5 IFA C8 C9 IF Output Simplified theory of operation The TQ5633 contains a RF amplifier, balanced mixer, LO buffer, IF amplifier and gain step switches. Figure 1 shows a block diagram. In the high gain mode, the RF Amp is turned on and the bypass switch is turned off. RF signal enters pin 1 and is amplified by 10dB before arriving at the passive balanced mixer. Total conversion gain is approximately 16dB. The LO input at pin 8 is amplified by a saturating balanced driver before being applied to the mixer. By using amplification the LO drive remains constant over some range of LO input power and temperature. The LO tuning is internal and centered around 2070MHz. The mixer utilizes proprietary techniques for attaining a very high degree of balance. It converts the PCS band signal down to approximately 110MHz using a high side LO source. By utilizing a passive mixer it provides for excellent IP3 response. The IF signal is taken off of the mixer and applied to an IF amplifier which provides gain. The source of the IF stage is brought out to pin 3 so an external tuned circuit can be used to optimize IP2. The tuned circuit works by providing a high IF impedance at the source of the output differential pair. High IF common-mode rejection and balance are achieved by using a high IF impedance. The low gain mode differs in that the RF amplifier is turned off and passive switches route the RF input signal directly to the mixer. In that case the total conversion gain is approximately Figure 1 TQ5633 Simplified Block Diagram and Schematic Logic truth table and logic control functions The TQ5633 logic control was designed to mate with the TQ3631 or TQ3632 PCS Band LNAs. Although the TQ5633 has only one logic control line “C2”, it’s possible to obtain 4 different gain states when used in conjunction with the LNAs. Moreover, only two logic lines are needed. On the TQ5633 the “C2” control signal is superimposed on the LO input pin 7. A simple 2.2k ohm resistor and blocking capacitor serve as the decoupling network. Table 1 shows the logic control and device states for a TQ3631-TQ5633 combination. Control System Lines Mode LNA State TQ5633 State C2 C3 0 0 High Gain High Gain High Gain 0 1 High Gain, Low Linearity High Gain, Low Linearity High Gain 1 0 Mid Gain High Gain Low Gain 1 1 Low Gain Bypass Low Gain Logic Table 1 7dB. For additional information and latest specifications, see our website: www.triquint.com 7 TQ5633 Data Sheet TUNING: IF Amplifier- The IF amplifier output at pin 5 requires a F1 RF Input 1 match down to 50 ohms in addition to a source of DC bias. A simple matching network that performs well for both functions is a shunt-L series-C type. See Figure 1. The L3 inductor provides DC bias to the IF amplifier while functioning as part of the IF matching network. The C9 capacitor provides a DC block and functions as the second AC matching component. During the design phase it is usually fairly easy to empirically determine these components by attaching a network analyzer to the 50ohm side of the IF network, and vary L3 and C9 until good return loss at the IF frequency is obtained. Typical values for L3 will be 180nH to 270nH and typical values of C9 are from REMOVE TQ5633 FROM BOARD 2 COAXIAL PROBE 8 R3 Vdd RFA C6 LO Input C5 7 R1 Ground at pad 2 C2, Gain Select C7 C3 Vdd Mixer 3 6 4 5 L2 R4 L3 C4 Vdd R5 IFA C8 MEASURE S11 C9 IF Output NETWORK ANALYZER 4.7pF to 15pF. Note that unlike a single-ended mixer type design, a shunt-C element at the output is not required. The TQ5633 leaks only a small amount of LO energy out of the RF port, so no additional shunt-C filtering is required. IF Tank Circuit- As discussed in the introduction, the S11 Marker at IF freq e.g. 110MHz parallel LC circuit on pin 3 functions by creating a high IF impedance at the sources of the IF amplifier, improving common mode rejection. Once a prototype phone board layout is finished there remains the task of assigning the values of these components. For a parallel circuit Rp = Q x Xp. Thus the higher Q and Xp (i.e. Lp) are, the better IP2 will be. However, too high of a value for L2 will make the circuit more prone to parasitic capacitances. A good compromise would be to follow the evaluation board example and start with a 3.3pF capacitor for C3. Then using a network analyzer probe measure the impedance at the pin 3 pad with the TQ5633 absent. Adjust L2 until the network analyzer measures S11 as close as possible to Γ = 1 at an angle of (i.e. an open circuit). In practice an |S11| of 7.5k ohms is attainable with a 0805 size 470nH inductor. Smaller package 0603 and 0402 inductors may not be obtainable in 00 such high values so that some compromises will have to be made if inductor size is an issue. See Figure 2. Figure 2 IF Tank Tuning Further Improving IP2: Although the TQ5633 is exceptional in its isolation of the LO signal from the RF port, there is still a miniscule amount of LO energy present, typically –40dBc. That energy tends to bounce off of the image filter and reenter the downconverter where, depending on its phase, it creates a very small DC offset in the mixer. The phenomena occurs in the Low Gain mode where it can create 4 to 5 dBm variation in IP2 depending on how closely the image filter is located to the TQ5633. Thus for applications demanding the highest Half-IF spur rejection, higher IP2 can possibly be obtained by tailoring the length of the transmission line between the filter and chip. The specific line length will depend upon board layout and will vary between filter types. If it appears that the needed length will be long, the line can be “U” shaped in order to conserve space. Measurements have indicated that there is some reduction in gain at the optimum line length. 8 For additional information and latest specifications, see our website: www.triquint.com TQ5633 Data Sheet Package Pinout RF INPUT RF IN VDD RF Amplifier Vdd GND LO IN IF Common Mode Tune Tune GND Mixer Vdd VDD IF out LO Input RF amplifier Control IF OUTPUT Pin Descriptions Pin Name Pin # Description and Usage RF INPUT 1 RF Amplifier Input GND 2 Ground Tune 3 IF Amplifier Common Mode Point Vdd 4 Mixer Vdd IF OUT 5 IF Output and IF Amplifier Vdd GND 6 LO Common Mode Ground LO INPUT 7 LO Input and RF Amplifier Gain Select Vdd 8 RF Amplifier Vdd For additional information and latest specifications, see our website: www.triquint.com 9 TQ5633 Data Sheet Package Type: SOT23-8 Plastic Package Note 1 PIN 1 E E1 b FUSED LEAD Note 2 A c e DESIGNATION A A1 b c D e E E1 L Theta L A1 DESCRIPTION OVERALL HEIGHT STANDOFF LEAD WIDTH LEAD THICKNESS PACKAGE LENGTH LEAD PITCH LEAD TIP SPAN PACKAGE WIDTH FOOT LENGTH FOOT ANGLE DIE METRIC 1.20 +/-.25 mm .100 +/-.05 mm .365 mm TYP .127 mm TYP 2.90 +/-.10 mm .65 mm TYP 2.80 +/-.20 mm 1.60 +/-.10 mm .45 +/-.10 mm 1.5 +/-1.5 DEG θ ENGLISH 0.05 +/-.250 in .004 +/-.002 in .014 in .005 in .114 +/-.004 in .026 in .110 +/-.008 in .063 +/-.004 in .018 +/-.004 in 1.5 +/-1.5 DEG NOTE 3 3 3 3 1,3 3 3 2,3 3 Notes 1. The package length dimension includes allowance for mold mismatch and flashing. 2. The package width dimension includes allowance for mold mismatch and flashing. 3. Primary dimensions are in metric millimeters. The English equivalents are calculated and subject to rounding error. Additional Information For latest specifications, additional product information, worldwide sales and distribution locations, and information about TriQuint: Web: www.triquint.com Tel: (503) 615-9000 Fax: (503) 615-8900 For technical questions and additional information on specific applications: The information provided herein is believed to be reliable; TriQuint assumes no liability for inaccuracies or omissions. TriQuint assumes no responsibility for the use of this information, and all such information shall be entirely at the user's own risk. Prices and specifications are subject to change without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. TriQuint does not authorize or warrant any TriQuint product for use in life-support devices and/or systems. Copyright © 2000 TriQuint Semiconductor, Inc. All rights reserved. Revision A, May, 2000 10 For additional information and latest specifications, see our website: www.triquint.com