DEMO MANUAL DC1983A LTC5510 1MHz to 6GHz Wideband High Linearity Active Mixer Description Demonstration circuit 1983A showcases the LTC®5510 wideband high linearity active mixer for both upconverting and downconverting applications. Its input port is optimized for 30MHz to 3GHz, and its output port is optimized for 1.2GHz to 2.1GHz. The LO input can be either high side or low side. Another demonstration circuit, the DC1984A, is designed for evaluating the LTC5510 at the lower output frequency range of 10MHz to 1.3GHz. DEMO BOARD INPUT RANGE DC1983A 30MHz to 3GHz DC1984A LO RANGE OUTPUT RANGE 5MHz to 6GHz 1.2GHz to 2.1GHz 30MHz to 2.6GHz 5MHz to 6GHz 10MHz to 1.3GHz The LTC5510 is a high linearity active mixer optimized for applications requiring very wide input bandwidth, low distortion, and low LO leakage. The IC includes a doublebalanced active mixer with input buffer and a high speed LO amplifier. The mixer can be used for both up- and down-conversion and requires only 0dBm of LO power to achieve excellent distortion and noise performance. The LTC5510 is optimized for 5V but can also be used with a 3.3V supply with reduced performance. The shutdown function allows the part to be disabled for further power saving. Design files for this circuit board are available at http://www.linear.com/demo/DC1983A L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Performance Summary Specifications are at TC = 25°C, VCC = 5V, EN = High, PLO = 0dBm, PIN = –10dBm (–10dBm/tone for two-tone tests), unless otherwise noted. (Note 1) PARAMETER CONDITIONS VALUE UNITS Input Frequency Range 30 to 3000 MHz Output Frequency Range 1200 to 2100 MHz 5 to 6000 MHz –6 to 6 dBm LO Input Frequency Range LO Input Power Range Supply Voltage Range 5V Supply, R1 = 4.75kΩ (Default Configuration) 3.3V Supply, R1 = 1.8kΩ 4.5 to 5.3 3.1 to 3.5 Supply Current 5V Supply, R1 = 4.75kΩ (Default Configuration) 3.3V Supply, R1 = 1.8kΩ 99.6 94 mA mA Total Supply Current During Shutdown EN = Low 1.3 mA >1.8 V EN Input High Voltage (On) EN Input Low Voltage (Off) V V <0.5 V –20 to 200 µA EN: Low to High 0.6 µs EN: High to Low 0.6 µs Temperature Monitor Pin (TEMP) DC Voltage at TJ = 25°C IIN = 10µA IIN = 80µA 697 755 mV mV Temperature Monitor Pin (TEMP) Voltage Temperature Coefficient IIN = 10µA IIN = 80µA –1.80 –1.61 EN Input Current –0.3V to VCC + 0.3V Turn-On Time Turn-Off Time mV/°C mV/°C dc1983af 1 DEMO MANUAL DC1983A Performance Summary Specifications are at TC = 25°C, VCC = 5V, EN = High, PLO = 0dBm, PIN = –10dBm (–10dBm/tone for two-tone tests), unless otherwise noted. (Note 1) PARAMETER CONDITIONS VALUE UNITS 5V Wideband Up/Downmixer Application: fIN = 30MHz to 3000MHz, fOUT = 1575MHz, 5V Supply, R1 = 4.75kΩ (Default Configuration) Conversion Gain fIN = 190MHz, fLO = 1765MHz, Upmixer fIN = 900MHz, fLO = 2475MHz, Upmixer fIN = 2150MHz, fLO = 575MHz, Downmixer fIN = 2600MHz, fLO = 1025MHz, Downmixer 1.5 1.4 1.1 1.2 dB dB dB dB Two-Tone Output 3rd-Order Intercept (∆f = 2MHz) fIN = 190MHz, fLO = 1765MHz, Upmixer fIN = 900MHz, fLO = 2475MHz, Upmixer fIN = 2150MHz, fLO = 575MHz, Downmixer fIN = 2600MHz, fLO = 1025MHz, Downmixer 27.8 25.0 26.0 24.5 dBm dBm dBm dBm SSB Noise Figure fIN = 190MHz, fLO = 1765MHz, Upmixer fIN = 900MHz, fLO = 2475MHz, Upmixer fIN = 2150MHz, fLO = 575MHz, Downmixer fIN = 2600MHz, fLO = 1025MHz, Downmixer 11.6 12.1 11.6 11.8 dB dB dB dB SSB Noise Figure Under Blocking fIN = 900MHz, fLO = 2475MHz, fBLOCK = 800MHz, PBLOCK = +5dBm 20.3 dB LO-IN Leakage fLO = 20MHz to 3300MHz < –50 dBm LO-OUT Leakage fLO = 20MHz to 1000MHz fLO = 1000MHz to 3300MHz < –40 < –33 dBm dBm IN-OUT Isolation fIN = 20MHz to 1150MHz fIN = 1150MHz to 3000MHz >40 >22 dB dB IN-LO Isolation fIN = 30MHz to 3300MHz >55 dB Input 1dB Compression fIN = 190MHz, fLO = 1765MHz, Upmixer fIN = 900MHz, fLO = 2475MHz, Upmixer fIN = 2150MHz, fLO = 575MHz, Downmixer fIN = 2600MHz, fLO = 1025MHz, Downmixer 11.0 12.2 11.5 11.6 dBm dBm dBm dBm 3.3V Wideband Up/Downmixer Application: fIN = 30MHz to 3000MHz, fOUT = 1575MHz, 3.3V Supply, R1 = 1.8kΩ Conversion Gain fIN = 190MHz, fLO = 1765MHz, Upmixer fIN = 900MHz, fLO = 2475MHz, Upmixer fIN = 2150MHz, fLO = 575MHz, Downmixer fIN = 2600MHz, fLO = 1025MHz, Downmixer 1.5 1.4 1.1 1.2 dB dB dB dB Two-Tone Output 3rd-Order Intercept (∆f = 2MHz) fIN = 190MHz, fLO = 1765MHz, Upmixer fIN = 900MHz, fLO = 2475MHz, Upmixer fIN = 2150MHz, fLO = 575MHz, Downmixer fIN = 2600MHz, fLO = 1025MHz, Downmixer 24.2 23.3 23.9 22.3 dBm dBm dBm dBm SSB Noise Figure fIN = 190MHz, fLO = 1765MHz, Upmixer fIN = 900MHz, fLO = 2475MHz, Upmixer fIN = 2150MHz, fLO = 575MHz, Downmixer fIN = 2600MHz, fLO = 1025MHz, Downmixer 11.2 12.2 11.4 11.4 dB dB dB dB SSB Noise Figure Under Blocking fIN = 900MHz, fLO = 2475MHz, fBLOCK = 800MHz, PBLOCK = +5dBm 20.8 dB LO-IN Leakage fLO = 20MHz to 3300MHz < –50 dBm LO-OUT Leakage fLO = 20MHz to 1000MHz fLO = 1000MHz to 3300MHz < –40 < –33 dBm dBm IN-OUT Isolation fIN = 20MHz to 1150MHz fIN = 1150MHz to 3000MHz >40 >22 IN-LO Isolation fIN = 30MHz to 3300MHz >55 dB Input 1dB Compression fIN = 190MHz, fLO = 1765MHz, Upmixer fIN = 900MHz, fLO = 2475MHz, Upmixer fIN = 2150MHz, fLO = 575MHz, Downmixer fIN = 2600MHz, fLO = 1025MHz, Downmixer 8.9 10.7 10.1 9.6 dBm dBm dBm dBm dB dB Note 1: Subject to change without notice. Refer to the latest LTC5510 data sheet for the most-up-to-date specifications. dc1983af 2 DEMO MANUAL DC1983A DETAILED DESCRIPTION Absolute Maximum Ratings Enable Function NOTE. Stresses beyond absolute maximum ratings may cause permanent damage to the device. Exposure to any absolute maximum rating condition for extended periods may affect device reliability and lifetime. The LTC5510 features Enable/Shutdown control. When the applied Enable (EN) voltage is logic high (>1.8V), the mixer is enabled. When the Enable (EN) voltage is logic low (<0.5V), the mixer is shutdown reducing current consumption to approximately 1.3mA. The Enable voltage should never fall below –0.3V or exceed the power supply voltage by more than 0.3V. Supply Voltage Ramping Fast ramping of the supply voltage can cause a current glitch in the internal ESD protection circuits. Depending on the supply inductance, this could result in a supply voltage transient that exceeds the maximum rating. A supply voltage ramp time of greater than 1ms is recommended. Do not clip powered test leads directly onto the demonstration circuit’s VCC and EN turrets. Instead, make all necessary connections with power supplies turned off, then increase to operating voltage. Supply Voltage The LTC5510 automatically detects the supply voltage and configures internal components for 5V or 3.3V operation. The auto-detect circuit switches at approximately 4.1V. To avoid undesired operation, the mixer should only be operated in the 4.5V to 5.3V or 3.1V to 3.6V supply range. For best overall temperature performance, the external bias adjustment resistor, R1, should be set to 4.75kΩ for 5V supply and 1.8kΩ for 3.3V supply. By default, demonstration circuit 1983A is configured for 5V supply with R1 = 4.75kΩ pre-installed. Temperature Monitor (Temp) The LTC5510’s junction temperature can be estimated by forcing a current into the on-chip diode and measuring the resulting voltage: 10µA forced current: TJ = VD – 742.4 –1.796 80µA forced current: TJ = VD – 795.6 –1.609 Where TJ is the junction temperature in °C, and VD is the TEMP pin voltage in mV. IN Port Demonstration Circuit 1983A’s IN port is broadband matched to 50Ω from 30MHz to 3GHz. 0 –6 RETURN LOSS (dB) Supply Voltage (VCC)................................................6.0V Enable Voltage (EN)..........................–0.3V to VCC + 0.3V LO Input Power (1MHz to 6GHz)......................... +10dBm IN Input Power (1MHz to 6GHz).......................... +18dBm Temp Monitor Input Current (TEMP).......................10mA Operating Temperature Range (TC)......... –40°C to 105°C –12 –18 –24 –30 0 1000 2000 3000 FREQUENCY (MHz) 4000 dn1983a F01 Figure 1. IN Port Return Loss dc1983af 3 DEMO MANUAL DC1983A DETAILED DESCRIPTION LO Input OUT Port Demonstration Circuit 1983A’s LO input port is broadband matched to 50Ω from 5MHz to 6GHz, with better than 10dB return loss. The impedance match is maintained whether the part is enabled or disabled. Demonstration Circuit 1983A utilizes a compact multilayer chip hybrid balun at the output port. The output port is well matched to 50Ω from 1.2GHz to 2.1GHz. The OUT port can be re-matched for other frequencies. See the LTC5510 data sheet for more details and impedance data. 0 0 –6 –12 RETURN LOSS (dB) RETURN LOSS (dB) –6 ON (EN = HI) –18 –24 OFF (EN = LOW) –30 0 1000 2000 3000 4000 FREQUENCY (MHz) –12 –18 –24 5000 dc1983a F02 Figure 2. LO Port Return Loss –30 1000 1500 2000 2500 FREQUENCY (MHz) 3000 dn1983a F03 Figure 3. OUT Port Return Loss Quick Start Procedure Demonstration circuit 1983A is easy to set up to evaluate the performance of the LTC5510. Refer to Figure 4, Figure 5, and Figure 6 for proper equipment connections. NOTE. Care should be taken to never exceed absolute maximum input ratings. Make all connections with RF and DC power off. Return Loss Measurements 1.Configure the Network Analyzer for return loss measurement, set appropriate frequency range, and set the test signal to 0dBm. 2.Calibrate the network analyzer. 3.Connect all test equipment as shown in Figure 4 with the DC power supply turned off. 4.Increase the DC power supply voltage to 5V, and verify that the total current consumption is close to the figure listed in the Performance Summary. The supply voltage should be confirmed at the demo board VCC and GND terminals to account for test lead ohmic losses. 5.Terminate unused demo board ports in 50Ω. Measure return losses of the IN, LO and OUT ports. RF Performance Measurements 1.Connect all test equipment as shown in Figure 5 with the signal generators and the DC power supply turned off. dc1983af 4 DEMO MANUAL DC1983A Quick Start Procedure 2.Increase the DC power supply voltage to 5V, and verify that the total current consumption is close to the figure listed in the Performance Summary. The supply voltage should be confirmed at the demo board VCC and GND terminals to account for test lead ohmic losses. 7.Turn off one of the RF signal generators, and measure Conversion Gain, IN-OUT isolation, LO-OUT leakage, and Input 1dB compression point. 3.Set the LO source (Signal Generator 1) to provide a 0dBm CW signal at appropriate LO frequency to the demo board LO input port. 1.Configure and calibrate the noise figure meter for mixer measurements. 4.Set the RF sources (Signal Generators 2 and 3) to provide two –10dBm CW signals, 2MHz apart, at the appropriate frequencies to the demo board IN port. 5.Measure the resulting output on the Spectrum Analyzer: 6.Calculate Output 3rd-Order Intercept: OIP3 = ∆IM3 +POUT 2 Noise Figure Measurement 2.Connect all test equipment as shown in Figure 6 with the signal generator and the DC power supply turned off. 3.Increase the DC power supply voltage to 5V, and verify that the total current consumption is close to the figure listed in the Performance Summary. The supply voltage should be confirmed at the demo board VCC and GND terminals to account for test lead ohmic losses. 4.Measure the single-sideband noise figure. Where ΔIM3 = POUT – PIM3. POUT is the lowest fundamental output signal power. PIM3 is the highest 3rd-order intermodulation product power. Figure 4. Proper Equipment Setup for Return Loss Measurements dc1983af 5 DEMO MANUAL DC1983A Quick Start Procedure Figure 5. Proper Equipment Setup for RF Performance Measurements Figure 6. Proper Equipment Setup for Noise Figure Measurement dc1983af 6 DEMO MANUAL DC1983A Measurement Equipment and Setup The LTC5510 is a wideband active mixer IC with very high linearity. Accuracy of its performance measurement is highly dependent on equipment setup and measurement technique. The recommended measurement setups are presented in Figure 4, Figure 5, and Figure 6. The following precautions should be observed: 1.Use high performance signal generators with low harmonic output and low phase noise, such as the Rohde & Schwarz SME06. Filters at the signal generators’ outputs may also be used to suppress higher-order harmonics. 2.A high quality RF power combiner which provides broadband 50Ω termination on all ports and have good port-to-port isolation should be used, such as the MiniCircuits ZFSC-2-372-S+. 3.Use high performance amplifiers with high IP3 and high reverse isolation, such as the Mini-Circuits ZHL-1042J, on the outputs of the RF signal generators to improve source isolation to prevent the sources from modulating each other and generating intermodulation products. 4.Use attenuator pads with good VSWR on the demonstration circuit’s input and output ports to improve source and load match to reduce reflections, which may degrade measurement accuracy. 6.Use narrow resolution bandwidth (RBW) and engage video averaging on the spectrum analyzer to lower the displayed average noise level (DANL) in order to improve sensitivity and to increase dynamic range. However, the trade off is increased sweep time. 7.Spectrum analyzers can produce significant internal distortion products if they are overdriven. Generally, spectrum analyzers are designed to operate at their best with about –30dBm at their input filter or preselector. Sufficient spectrum analyzer input attenuation should be used to avoid saturating the instrument, but too much attenuation reduces sensitivity and dynamic range. 8.Before taking measurements, the system performance should be evaluated to ensure that: a. Clean input signals can be produced. The two-tone signals’ OIP3 should be at least 15dB better than the DUT’s IIP3. b.The spectrum analyzer’s internal distortion is minimized. c. The spectrum analyzer has enough dynamic range and sensitivity. The measurement system’s IIP3 should be at least 15dB better than the DUT’s OIP3. d.The system is accurately calibrated for power and frequency. 5.A high dynamic range spectrum analyzer, such as the Rohde & Schwarz FSEM30, should be used for linearity measurement. dc1983af 7 DEMO MANUAL DC1983A PCB Layout Layer 1, Top Layer Layer 2, Ground Plane dc1983af 8 DEMO MANUAL DC1983A PCB Layout Layer 3, Power Plane Layer 4, Bottom Layer dc1983af 9 DEMO MANUAL DC1983A Parts List ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER CAP, 0402, X7R, 16V, 0.1µF, 10% MURATA, GRM155R71C104KA88D Required Circuit Components 1 4 C1, C2, C4, C5 2 1 C3 CAP, 0402, C0G, 50V, 0.7pF, ±0.1pF MURATA, GJM1555C1HR70BB01D 3 1 C6 CAP, 0603, X7R, 16V, 1µF, 10% MURATA, GRM188R71C105KA12D 4 2 C7, C8 CAP, 0402, X7R, 16V, 10nF, 10% MURATA, GRM155R71C103KA01D 5 1 C9 CAP, 0402, C0G, 50V, 6.8pF, ±0.1pF MURATA, GJM1555C1H6R8BB01D 6 4 E1, E2, E3, E4 TESTPOINT, TURRET, 0.094" MILL-MAX, 2501-2-00-80-00-00-07-0 7 3 J1, J2, J3 CONN, SMA, 50Ω, EDGE-LAUNCH E. F. JOHNSON, 142-0701-851 8 2 L1, L2 IND, 0402, WIRE-WOUND, 6.8nH, 2% COILCRAFT, 0402HP-6N8XGLU 9 1 L3 RES, 0603, 0Ω JUMPER VISHAY, CRCW06030000Z0ED 10 1 R1 RES, 0402, 1/16W, 4.75k, 1% VISHAY, CRCW04024K75FKED 11 1 T1 XFMR, 1:1, 4.5-3000MHz MINI-CIRCUITS, TC1-1-13M+ 12 1 T2 XFMR, 4:1, 1200-2200MHz ANAREN, BD1222J50200AHF 13 1 U1 IC, LTC5510IUF#PBF, QFN 4mm × 4mm LINEAR TECHNOLOGY, LTC5510IUF#PBF 15 1 FAB, PRINTED CIRCUIT BOARD DEMO CIRCUIT 1983A dc1983af 10 Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. A B C EN 3.1V - 3.6V E3 5 1. ALL COMPONENTS ARE 0402 SIZE 6 4 1.8K 4.75K R1 NOTE: UNLESS OTHERWISE SPECIFIED 4.5V - 5.3V RANGE E4 T1 1:1 XFMR MINI-CIRCUITS TC1-1-13M+ 3.3V VCC VCC RANGE J1 3 2 1 5V (DEFAULT) * IN TEMP J2 4 C2 0.1uF C3 0.7pF C1 0.1uF LGND IN- IN+ TEMP U1 LTC5510IUF 3 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. CUSTOMER NOTICE 9 17 10 11 12 2 3 2 6 1 __ ECO SCALE = NONE A.K. SUNNY H. PCB DES. APP ENG. DATE: 2 DESCRIPTION * SUNNY H. APPROVED DATE 06-28-13 LTC5510IUF 1 DEMO CIRCUIT 1983A Friday, June 28, 2013 IC NO. SHEET 1 OF 1 REV. 2 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only GND 4.5V - 5.3V VCC OUT TECHNOLOGY E2 E1 J3 PRODUCTION 1 REVISION HISTORY WIDEBAND ACTIVE MIXER, HIGH FREQUENCY OUTPUT N/A SIZE TITLE: SCHEMATIC C6 1uF 0603 C9 6.8pF 2 REV 4 5 C8 10nF T2 4:1 XFMR ANAREN BD1222J50200AHF APPROVALS L2 6.8nH L1 6.8nH LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. C7 10nF * R1 4.75K GND GND OUT- OUT+ GND 0.1uF C5 3 Figure 7. Demonstration Circuit Schematic L3 0 Ohm 0603 4 3 2 1 0.1uF C4 13 LO 4 16 TP 15 VCC1 6 EN 5 LO+ 14 LOVCC2 7 GND IADJ 8 D 5 A B C D DEMO MANUAL DC1983A Schematic Diagram dc1983af 11 DEMO MANUAL DC1983A DEMONSTRATION BOARD IMPORTANT NOTICE Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions: This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations. If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES. The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LTC from all claims arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or agency certified (FCC, UL, CE, etc.). No License is granted under any patent right or other intellectual property whatsoever. LTC assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind. LTC currently services a variety of customers for products around the world, and therefore this transaction is not exclusive. Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and observe good laboratory practice standards. Common sense is encouraged. This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LTC application engineer. Mailing Address: Linear Technology 1630 McCarthy Blvd. Milpitas, CA 95035 Copyright © 2004, Linear Technology Corporation dc1983af 12 Linear Technology Corporation LT 0813 • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com LINEAR TECHNOLOGY CORPORATION 2013