LTC5549 2GHz to 14GHz Microwave Mixer with Integrated LO Frequency Doubler Description Features Upconversion or Downconversion nn High IIP3: +28.2dBm at 5.8GHz +22.8dBm at 12GHz nn 8.0dB Conversion Loss at 5.8GHz nn +14.3dBm Input P1dB at 5.8GHz nn Integrated LO Buffer: 0dBm LO Drive nn Bypassable Integrated LO Frequency Doubler nn Low LO-RF Leakage: <–30dBm nn 50Ω Single-Ended RF, LO and IF Ports nn 3.3V/115mA Supply nn Fast Turn ON/OFF for TDD Operation nn 2mm × 3mm, 12-Lead QFN Package The LTC®5549 is a general purpose passive doublebalanced mixer that can be used for upconversion or downconversion. The RF port is designed for the 2GHz to 14GHz band and the IF port is optimized for 500MHz to 6GHz operation. An integrated LO buffer amplifier supports LO frequencies from 1GHz to 12GHz, requiring only 0dBm LO power. The LTC5549 delivers high IIP3 and input P1dB with low power consumption. Applications The LTC5549’s high level of integration minimizes the total solution cost, board space and system level variation with its 2mm × 3mm package size. nn Microwave Transceivers Wireless Backhaul nn Point-to-Point Microwave nn Phased-Array Antennas nn C, X and Ku Band RADAR nn Test Equipment nn Satellite MODEMs nn nn An internal LO frequency doubler can be enabled by a CMOS-compatible digital control pin, allowing operation with a lower, one-half LO input frequency. This allows the mixer’s LO port to be used with existing synthesizers, such as the LTC6946 and LTC6948 family. 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. Typical Application Conversion Loss and IIP3 (Low Side LO, IF = 1890MHz) LNA RF IF RX IFOUT LO RX LO DUPLEXER TX LO LO PA RF IF TX IFIN LTC5549 5549 TA01a 30 CONVERSION LOSS (dB), IIP3 (dBm) LTC5549 28 IIP3 26 24 22 20 18 DOWNMIXING UPMIXING 16 14 12 CONVERSION LOSS 10 8 6 3 4 5 6 7 8 9 10 11 12 13 RF FREQUENCY (GHz) 5549 TA01b 5549fa For more information www.linear.com/LTC5549 1 LTC5549 Absolute Maximum Ratings Pin Configuration (Note 1) IF 2 GND 3 LO GND 12 11 10 13 4 5 6 GND 1 RF GND GND TOP VIEW GND Supply Voltage (VCC)...................................................4V Enable Input Voltage (EN).................–0.3V to VCC + 0.3V X2 Input Voltage (X2).......................–0.3V to VCC + 0.3V LO Input Power (1GHz to 12GHz)................... ….+10dBm LO Input DC Voltage ............................................. ±0.1V RF Power (2GHz to 14GHz).................................+20dBm RF DC Voltage ........................................................ ±0.1V IF Power (0.5GHz to 6GHz).................................+20dBm IF DC Voltage.......................................................... ±0.1V Operating Temperature Range (TC)......... –40°C to 105°C Storage Temperature Range................... –65°C to 150°C Junction Temperature (TJ)..................................... 150°C 9 VCC 8 X2 7 EN UDB PACKAGE 12-LEAD (2mm × 3mm) PLASTIC QFN TJMAX = 150°C, θJC = 25°C/W EXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB Order Information Lead Free Finish TAPE AND REEL (MINI) TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC5549IUDB#TRMPBF LTC5549IUDB#TRPBF LGTZ 12-Lead (2mm × 3mm) Plastic QFN TRM = 500 pieces. *Temperature grades are identified by a label on the shipping container. Consult LTC Marketing for parts specified with wider operating temperature ranges. Consult LTC Marketing for information on lead based finish parts. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/ –40°C to 105°C DC Electrical Characteristics The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TC = 25°C. VCC = 3.3V, EN = High, unless otherwise noted. Test circuit shown in Figure 1. (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS 3.0 3.3 3.6 V 115 130 136 155 mA mA 100 μA Power Supply Requirements Supply Voltage (VCC) l Supply Current Enabled EN = High, X2 = Low EN = High, X2 = High Disabled EN = Low Enable (EN) and LO Frequency Doubler (X2) Logic Inputs Input High Voltage (On) l Input Low Voltage (Off) l Input Current –0.3V to VCC + 0.3V 1.2 V –30 0.3 V 100 μA Chip Turn-On Time 0.2 μs Chip Turn-Off Time 0.1 μs 2 5549fa For more information www.linear.com/LTC5549 LTC5549 AC Electrical Characteristics The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TC = 25°C. VCC = 3.3V, EN = High, PLO = 0dBm, PRF = –5dBm (–5dBm/tone for twotone IIP3 tests), unless otherwise noted. Test circuit shown in Figure 1. (Notes 2, 3) PARAMETER CONDITIONS MIN TYP MAX UNITS LO Frequency Range l 1 to 12 GHz RF Frequency Range l 2 to 14 GHz IF Frequency Range l 500 to 6000 MHz RF Return Loss ZO = 50Ω, 2GHz to 13.6GHz >9 dB LO Input Return Loss ZO = 50Ω, 1GHz to 12GHz >10 dB IF Return Loss ZO = 50Ω, 0.7GHz to 6GHz LO Input Power X2 = Low X2 = High >10 –6 –6 0 0 dB 6 3 dBm dBm Downmixer Application with LO Doubler Off (X2 = Low) 7.8 8.0 9.4 10.8 dB dB dB dB 0.009 dB/°C RF Input = 2GHz, LO = 3.89GHz RF Input = 5.8GHz, LO = 3.91GHz RF Input = 9GHz, LO = 7.11GHz RF Input = 12GHz, LO = 10.11GHz 26.0 28.2 24.4 22.8 dBm dBm dBm dBm SSB Noise Figure RF Input = 2GHz, LO = 3.89GHz RF Input = 5.8GHz, LO = 3.91GHz RF Input = 8.5GHz, LO = 6.61GHz RF Input = 10GHz, LO = 8.11GHz 7.9 8.1 10.2 10.4 dB dB dB dB LO to RF Leakage fLO = 1GHz to 12GHz <–30 dBm LO to IF Leakage fLO = 1GHz to 12GHz <–27 dBm RF to LO Isolation fRF = 2GHz to 14GHz >45 dB RF Input to IF Output Isolation fRF = 2GHz to 14GHz >35 dB Input 1dB Compression RF Input = 5.8GHz, LO = 3.91GHz 14.3 dBm 8.2 9.9 11.9 dB dB dB 0.009 dB/°C Conversion Loss RF Input = 2GHz, LO = 3.89GHz RF Input = 5.8GHz, LO = 3.91GHz RF Input = 9GHz, LO = 7.11GHz RF Input = 12GHz, LO = 10.11GHz Conversion Loss vs Temperature TC = –40°C to 105°C, RF Input = 5.8GHz 2-Tone Input 3rd Order Intercept (ΔfRF = 2MHz) l Downmixer Application with LO Doubler On (X2 = High) Conversion Loss RF Input = 5.8GHz, LO = 1.955GHz RF Input = 9GHz, LO = 3.555GHz RF Input = 12GHz, LO = 5.055GHz Conversion Loss vs. Temperature TC = –40°C to 105°C, RF Input = 5.8GHz 2-Tone Input 3rd Order Intercept (ΔfRF = 2MHz) RF Input = 5.8GHz, LO = 1.955GHz RF Input = 9GHz, LO = 3.555GHz RF Input = 12GHz, LO = 5.055GHz 27.9 24.8 22.0 dBm dBm dBm SSB Noise Figure RF Input = 5.8GHz, LO = 1.955GHz RF Input = 8.5GHz, LO = 3.305GHz RF Input = 10GHz, LO = 4.055GHz 9.6 10.7 12.6 dB dB dB LO to RF Input Leakage fLO = 1GHz to 5GHz <–35 dBm 2LO to RF Input Leakage fLO = 1GHz to 5GHz ≤–28 dBm LO to IF Output Leakage fLO = 1GHz to 5GHz <–30 dBm 2LO to IF Output Leakage fLO = 1GHz to 5GHz <–31 dBm Input 1dB Compression fRF = 5.8GHz, fLO = 1.955GHz 13.8 dBm l 5549fa For more information www.linear.com/LTC5549 3 LTC5549 AC Electrical Characteristics The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TC = 25°C. VCC = 3.3V, EN = High, PLO = 0dBm, PIF = –5dBm (–5dBm/tone for twotone IIP3 tests), unless otherwise noted. Test circuit shown in Figure 1. (Notes 2, 3) PARAMETER CONDITIONS MIN TYP MAX UNITS Upmixer Application with LO Doubler Off (X2 = Low) Conversion Loss RF Output = 2GHz, LO = 3.89GHz RF Output = 5.8GHz, LO = 3.91GHz RF Output = 9GHz, LO = 7.11GHz RF Output = 12GHz, LO = 10.11GHz 7.7 7.8 9.2 10.7 dB dB dB dB Conversion Loss vs Temperature TC = –40°C to 105°C, RF Output = 5.8GHz 0.009 dB/°C Input 3rd Order Intercept (ΔfIF = 2MHz) RF Output = 2GHz, LO = 3.89GHz RF Output = 5.8GHz, LO = 3.91GHz RF Output = 9GHz, LO = 7.11GHz RF Output = 12GHz, LO = 10.11GHz 25.0 24.4 23.9 19.9 dBm dBm dBm dBm SSB Noise Figure RF Output = 2GHz, LO = 3.89GHz RF Output = 5.8GHz, LO = 3.91GHz RF Output = 8.5GHz, LO = 6.61GHz RF Output = 10GHz, LO = 8.11GHz 7.8 8.8 10.4 11.1 dB dB dB dB LO to RF Output Leakage fLO = 1GHz to 12GHz <–30 dBm LO to IF Input Leakage fLO = 1GHz to 12GHz <–27 dBm IF to LO Isolation fIF = 500MHz to 6GHz >45 dB IF to RF Isolation fIF = 500MHz to 6GHz >40 dB Input 1dB Compression RF Output = 5.8GHz, LO = 3.91GHz 15.5 dBm RF Output = 5.8GHz, LO = 1.955GHz RF Output = 9GHz, LO = 3.555GHz RF Output = 12GHz, LO = 5.055GHz 8.1 9.7 11.8 dB dB dB Conversion Loss vs Temperature TC = –40°C to 105°C, RF Output = 5.8GHz 0.009 dB/°C 2-Tone Input 3rd Order Intercept (ΔfIF = 2MHz) RF Output = 5.8GHz, LO = 1.955GHz RF Output = 9GHz, LO = 3.555GHz RF Output = 12GHz, LO = 5.055GHz 23.2 23.5 20.0 dBm dBm dBm SSB Noise Figure RF Output = 5.8GHz, LO = 1.955GHz RF Output = 9GHz, LO = 3.555GHz RF Output = 10GHz, LO = 4.055GHz 10.9 12.3 12.7 dB dB dB LO to RF Output Leakage fLO = 1GHz to 5GHz <–35 dBm 2LO to RF Output Leakage fLO = 1GHz to 5GHz <–30 dBm LO to IF Input Leakage fLO = 1GHz to 5GHz <–30 dBm 2LO to IF Input Leakage fLO = 1GHz to 5GHz <–31 dBm Input 1dB Compression RF Output = 5.8GHz, LO = 1.955GHz 15.4 dBm Upmixer Application with LO Doubler On (X2 = High) Conversion Loss Note 1: Stresses beyond those listed under 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. Note 2: The LTC5549 is guaranteed functional over the –40°C to 105°C case temperature range (θJC = 25°C/W). 4 Note 3: SSB noise figure measurements performed with a small-signal noise source, bandpass filter and 2dB matching pad on input, with bandpass filters on LO, and output. 5549fa For more information www.linear.com/LTC5549 LTC5549 Typical Performance Characteristics Supply Current vs Case Temperature Supply Current vs VCC 150 150 X2 = HIGH 140 130 130 120 120 ICC (mA) ICC (mA) 140 110 100 X2 = LOW 90 80 70 60 –40 –20 EN = high, test circuit shown in Figure 1. X2 = HIGH 110 X2 = LOW 100 90 VCC = 3.0V VCC = 3.3V VCC = 3.6V 0 20 40 60 80 CASE TEMPERATURE (°C) 100 120 –40°C 25°C 85°C 105°C 80 70 60 3 5549 G01 3.1 3.4 3.2 3.3 SUPPLY VOLTAGE (V) 3.5 3.6 5549 G02 5549fa For more information www.linear.com/LTC5549 5 LTC5549 Typical Performance Characteristics 2GHz to 13GHz downmixer application. VCC = 3.3V, EN = high, X2 = low, TC = 25°C, PLO = 0dBm, PRF = –5dBm (–5dBm/tone for two-tone IIP3 tests, Δf = 2MHz), IF = 1.89GHz, unless otherwise noted. Test circuit shown in Figure 1. Conversion Loss and IIP3 vs Case Temperature (Low Side LO) Conversion Loss and IIP3 vs Case Temperature (High Side LO) 28 28 CONVERSION LOSS (dB), IIP3 (dBm) CONVERSION LOSS (dB), IIP3 (dBm) 30 IIP3 26 24 22 –40°C 25°C 85°C 105°C 20 18 16 14 12 CONVERSION LOSS 10 8 6 3 4 5 6 7 8 9 26 24 20 –40°C 25°C 85°C 105°C 18 16 14 12 CONVERSION LOSS 10 8 6 10 11 12 13 IIP3 22 2 3 4 5 6 7 8 9 Conversion Loss and IIP3 vs LO Power (High Side LO) Conversion Loss and IIP3 vs LO Power (Low Side LO) 28 28 IIP3 26 CONVERSION LOSS (dB), IIP3 (dBm) CONVERSION LOSS (dB), IIP3 (dBm) 30 24 22 20 –6dBm 0dBm 6dBm 18 16 14 12 CONVERSION LOSS 10 8 3 4 5 6 7 8 9 26 24 20 18 –6dBm 0dBm 6dBm 16 14 12 CONVERSION LOSS 10 8 6 10 11 12 13 IIP3 22 2 3 4 5 6 7 8 9 Conversion Loss and IIP3 vs Supply Voltage (Low Side LO) Conversion Loss and IIP3 vs Supply Voltage (High Side LO) 28 28 CONVERSION LOSS (dB), IIP3 (dBm) 30 CONVERSION LOSS (dB), IIP3 (dBm) 11 5549 G06 5549 G05 IIP3 26 24 22 20 3.0V 3.3V 3.6V 18 16 14 12 CONVERSION LOSS 10 8 3 4 5 6 7 8 9 10 11 12 13 26 24 IIP3 22 20 18 3.0V 3.3V 3.6V 16 14 12 CONVERSION LOSS 10 8 6 2 3 4 5 6 7 8 9 10 11 RF FREQUENCY (GHz) RF FREQUENCY (GHz) 5549 G07 6 10 RF FREQUENCY (GHz) RF FREQUENCY (GHz) 6 11 5549 G04 5549 G03 6 10 RF FREQUENCY (GHz) RF FREQUENCY (GHz) 5549 G08 5549fa For more information www.linear.com/LTC5549 LTC5549 2GHz to 13GHz downmixer application. Typical Performance Characteristics VCC = 3.3V, EN = high, X2 = low, TC = 25°C, PLO = 0dBm, PRF = –5dBm (–5dBm/tone for two-tone IIP3 tests, Δf = 2MHz), IF = 1.89GHz, unless otherwise noted. Test circuit shown in Figure 1. Conversion Loss and IIP3 vs IF Frequency (Low Side LO) Input P1dB vs RF Frequency 16 27 LOW SIDE LO 15 IIP3 24 14 21 RF = 5.8GHz RF = 9.8GHz 18 15 12 INPUT PIdB (dBm) CONVERSION LOSS (dB), IIP3 (dBm) 30 13 HIGH SIDE LO 12 11 10 CONVERSION LOSS 9 9 6 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 8 2 3 4 IF FREQUENCY (GHz) 5 6 7 8 9 10 11 12 13 RF FREQUENCY (GHz) 5549 G09 5549 G10 LO Leakage RF Isolation –10 70 65 60 RF ISOLATION (dB) LO LEAKAGE (dBm) –20 LO-IF –30 LO-RF –40 RF-LO 55 50 HS LO 45 LS LO 40 35 RF-IF 30 25 –50 1 2 3 4 5 6 7 8 20 9 10 11 12 2 3 LO FREQUENCY (GHz) 4 5 6 7 8 9 10 11 12 13 RF FREQUENCY (GHz) 5549 G11 5549 G12 5.8GHz Conversion Loss Histogram 70 85°C 25°C –40°C 60 50 40 30 20 10 0 85°C 25°C –40°C 30 DISTRIBUTION (%) DISTRIBUTION (%) 5.8GHz IIP3 Histogram 35 25 20 15 10 5 7.2 7.4 7.6 7.8 8.0 8.2 8.4 8.6 0 26.2 26.8 27.4 CONVERSION LOSS (dB) 28 28.6 29.2 29.8 CONVERSION LOSS (dB) 5549 G13 5549 G14 5549fa For more information www.linear.com/LTC5549 7 LTC5549 Typical Performance Characteristics 2GHz to 13GHz downmixer application with LO frequency doubler enabled. VCC = 3.3V, EN = high, X2 = high, TC = 25°C, PLO = 0dBm, PRF = –5dBm (–5dBm/tone for two-tone IIP3 tests, Δf = 2MHz), IF = 1.89GHz, unless otherwise noted. Test circuit shown in Figure 1. Conversion Loss and IIP3 vs LO Power (Low Side LO) 30 28 28 IIP3 26 24 22 –40°C 25°C 85°C 105°C 20 18 16 14 12 CONVERSION LOSS 10 8 6 3 4 5 6 7 8 9 30 IIP3 26 24 22 –6dBm 0dBm 3dBm 20 18 16 14 12 CONVERSION LOSS 10 8 6 10 11 12 13 Conversion Loss and IIP3 vs Supply Voltage (Low Side LO) CONVERSION LOSS (dB), IIP3 (dBm) 30 CONVERSION LOSS (dB), IIP3 (dBm) CONVERSION LOSS (dB), IIP3 (dBm) Conversion Loss and IIP3 vs Case Temperature (Low Side LO) 3 4 5 6 RF FREQUENCY (GHz) 7 8 IIP3 22 –40°C 25°C 85°C 105°C 14 12 CONVERSION LOSS 10 8 6 2 3 4 5 6 7 8 9 24 22 20 –6dBm 0dBm 3dBm 18 16 14 12 CONVERSION LOSS 10 8 6 10 8 3 4 5 6 2 3 4 5 6 7 8 9 14 IIP3 RF = 5.8GHz RF = 9.8GHz 15 CONVERSION LOSS IF FREQUENCY (GHz) 10 11 12 13 22 20 3.0V 3.3V 3.6V 18 16 14 12 CONVERSION LOSS 10 8 2 3 4 5 6 7 8 LO and 2LO Leakage to IF 13 HIGH SIDE LO 11 10 8 10 5549 G20 –10 LOW SIDE LO 12 9 RF FREQUENCY (GHz) –20 2LO-IF –30 –40 LO-IF 2 3 4 5 6 7 8 9 10 11 12 13 –50 1 2 3 4 5 LO FREQUENCY (GHz) RF FREQUENCY (GHz) 5549 G21 9 IIP3 24 9 9 8 26 6 10 LO AND 2LO LEAKAGE (dBm) 27 21 7 5549 G17 Input P1dB vs RF Frequency 15 INPUT P1dB (dBm) CONVERSION LOSS (dB), IIP3 (dBm) CONVERSION LOSS 10 5549 G19 30 6 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 8 12 RF FREQUENCY (GHz) Conversion Loss and IIP3 vs IF Frequency (Low Side LO) 12 14 Conversion Loss and IIP3 vs Supply Voltage (High Side LO) IIP3 5549 G18 18 16 28 RF FREQUENCY (GHz) 24 3.0V 3.3V 3.6V 18 RF FREQUENCY (GHz) CONVERSION LOSS (dB), IIP3 (dBm) 26 CONVERSION LOSS (dB), IIP3 (dBm) CONVERSION LOSS (dB), IIP3 (dBm) 28 26 16 20 Conversion Loss and IIP3 vs LO Power (High Side LO) 28 18 22 5549 G16 Conversion Loss and IIP3 vs Case Temperature (High Side LO) 20 24 RF FREQUENCY (GHz) 5549 G15 24 IIP3 26 6 10 11 12 13 9 28 5549 G22 5549 G23 5549fa For more information www.linear.com/LTC5549 LTC5549 2GHz to 13GHz upmixer application. Typical Performance Characteristics VCC = 3.3V, EN = high, X2 = low, TC = 25°C, PLO = 0dBm, PIF = –5dBm (–5dBm/tone for two-tone IIP3 tests, Δf = 2MHz), IF = 1.89GHz, unless otherwise noted. Test circuit shown in Figure 1. Conversion Loss and IIP3 vs LO Power (Low Side LO) 28 26 26 IIP3 24 22 20 –40°C 25°C 85°C 105°C 18 16 14 12 CONVERSION LOSS 10 8 6 3 4 5 6 7 8 9 28 IIP3 24 22 20 –6dBm 0dBm 6dBm 18 16 14 12 CONVERSION LOSS 10 8 6 10 11 12 13 3 4 5 6 RF FREQUENCY (GHz) 7 8 9 IIP3 22 20 –40°C 25°C 85°C 105°C CONVERSION LOSS 10 8 6 2 3 4 5 6 7 8 9 22 20 16 14 12 CONVERSION LOSS 10 8 6 10 –6dBm 0dBm 6dBm 18 3 4 5 6 24 22 RF = 5.8GHz RF = 9.8GHz 14 CONVERSION LOSS 10 6 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 IF FREQUENCY (GHz) 2 3 4 5 6 7 8 9 9 10 11 12 13 IIP3 24 22 20 3.0V 3.3V 3.6V 18 16 14 12 CONVERSION LOSS 10 8 6 10 2 3 4 5 6 7 8 9 10 RF FREQUENCY (GHz) 5549 G29 IF Isolation 80 16 70 15 14 13 12 60 IF-LO 50 40 IF-RF 30 HS LO RF = 5.8GHz LS LO RF = 9.8GHz 10 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 20 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 IF FREQUENCY (GHz) IF FREQUENCY (GHz) 5549 G30 8 26 17 11 8 7 5549 G26 IF ISOLATION (dB) IIP3 INPUT P1dB (dBm) CONVERSION LOSS (dB), IIP3 (dBm) 8 Input P1dB vs IF Frequency 26 12 CONVERSION LOSS 10 5549 G28 30 16 12 RF FREQUENCY (GHz) Conversion Loss and IIP3 vs IF Frequency (Low Side LO) 18 14 Conversion Loss and IIP3 vs Supply Voltage (High Side LO) IIP3 5549 G27 20 16 28 24 RF FREQUENCY (GHz) 28 3.0V 3.3V 3.6V 18 RF FREQUENCY (GHz) CONVERSION LOSS (dB), IIP3 (dBm) 26 CONVERSION LOSS (dB), IIP3 (dBm) CONVERSION LOSS (dB), IIP3 (dBm) 28 12 20 Conversion Loss and IIP3 vs LO Power (High Side LO) 26 14 22 5549 G25 28 16 IIP3 24 RF FREQUENCY (GHz) Conversion Loss and IIP3 vs Case Temperature (High Side LO) 18 26 6 10 11 12 13 5549 G24 24 Conversion Loss and IIP3 vs Supply Voltage (Low Side LO) CONVERSION LOSS (dB), IIP3 (dBm) 28 CONVERSION LOSS (dB), IIP3 (dBm) CONVERSION LOSS (dB), IIP3 (dBm) Conversion Loss and IIP3 vs Case Temperature (Low Side LO) 5549 G31 5549 G32 5549fa For more information www.linear.com/LTC5549 9 LTC5549 Typical Performance Characteristics 2GHz to 13GHz upmixer application with LO frequency doubler enabled. VCC = 3.3V, EN = high, X2 = high, TC = 25°C, PLO = 0dBm, PIF = –5dBm (–5dBm/tone for two-tone IIP3 tests, Δf = 2MHz), output measured at 5.8GHz, unless otherwise noted. Test circuit shown in Figure 1. Conversion Loss and IIP3 vs LO Power (Low Side LO) 28 26 26 IIP3 24 22 20 –40°C 25°C 85°C 105°C 18 16 14 12 CONVERSION LOSS 10 8 4 5 6 7 8 10 9 11 12 28 IIP3 24 22 20 –6dBm 0dBm 3dBm 18 16 14 12 CONVERSION LOSS 10 8 6 13 4 5 RF FREQUENCY (GHz) 6 7 8 9 10 11 CONVERSION LOSS (dB), IIP3 (dBm) CONVERSION LOSS (dB), IIP3 (dBm) IIP3 22 –40°C 25°C 85°C 105°C 16 14 12 CONVERSION LOSS 10 8 2 3 4 5 6 8 7 9 20 –6dBm 0dBm 3dBm 18 16 14 12 CONVERSION LOSS 10 8 6 10 IIP3 22 4 5 6 7 8 10 9 11 IIP3 12 13 2 3 4 5 6 7 8 9 24 20 3.0V 3.3V 3.6V 18 16 14 12 CONVERSION LOSS 10 8 6 10 IIP3 22 2 3 4 5 6 8 7 9 10 RF FREQUENCY (GHz) 5549 G38 Input P1dB vs IF Frequency LO and 2LO Leakage to RF –10 22 RF = 5.8GHz RF = 9.8GHz 16 14 CONVERSION LOSS 10 15 14 13 12 11 8 6 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 IF FREQUENCY (GHz) LO AND 2LO LEAKAGE (dBm) 16 INPUT P1dB (dBm) CONVERSION LOSS (dB), IIP3 (dBm) 8 5549 G35 17 24 –20 2LO-RF –30 –40 HS LO RF = 5.8GHz LS LO RF = 9.8GHz LO-RF 10 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 IF FREQUENCY (GHz) 5549 G39 10 CONVERSION LOSS 10 5549 G37 28 12 12 RF FREQUENCY (GHz) Conversion Loss and IIP3 vs IF Frequency (Low Side LO) 18 14 26 5549 G36 20 16 Conversion Loss and IIP3 vs Supply Voltage (High Side LO) 24 RF FREQUENCY (GHz) 26 3.0V 3.3V 3.6V 18 RF FREQUENCY (GHz) 26 18 20 Conversion Loss and IIP3 vs LO Power (High Side LO) 26 20 22 6 13 IIP3 24 5549 G34 Conversion Loss and IIP3 vs Case Temperature (High Side LO) 24 26 RF FREQUENCY (GHz) 5549 G33 6 12 CONVERSION LOSS (dB), IIP3 (dBm) 6 Conversion Loss and IIP3 vs Supply Voltage (Low Side LO) CONVERSION LOSS (dB), IIP3 (dBm) 28 CONVERSION LOSS (dB), IIP3 (dBm) CONVERSION LOSS (dB), IIP3 (dBm) Conversion Loss and IIP3 vs Case Temperature (Low Side LO) –50 1 2 3 4 5 LO FREQUENCY (GHz) 5549 G40 5549 G41 5549fa For more information www.linear.com/LTC5549 LTC5549 Pin Functions GND (Pins 1, 3, 4, 6, 10, 12, Exposed Pad Pin 13): Ground. These pins must be soldered to the RF ground on the circuit board. The exposed pad metal of the package provides both electrical contact to ground and good thermal contact to the printed circuit board. EN (Pin 7): Enable Pin. When the voltage to this pin is greater than 1.2V, the mixer is enabled. When the input voltage is less than 0.3V, the mixer is disabled. Typical current drawn is less than 30μA. This pin has an internal 376kΩ pull-down resistor. IF (Pin 2): Single-Ended Terminal for the IF Port. This pin is internally connected to the primary side of the IF transformer, which has low DC resistance to ground. A series DC blocking capacitor should be used to avoid damage to the integrated transformer when DC voltage is present. The IF port is impedance matched from 500MHz to 6GHz, as long as the LO is driven with a 0 ±6dBm source between 1GHz and 12GHz. X2 (Pin 8): Digital Control Pin for LO Frequency Doubler. When the voltage to this pin is greater than 1.2V, the LO frequency doubler is enabled. When the input voltage is less than 0.3V, the LO frequency doubler is disabled. Typical current drawn is less than 30μA. This pin has an internal 376kΩ pull-down resistor. RF (Pin 5): Single-Ended Terminal for the RF Port. This pin is internally connected to the primary side of the RF transformer, which has low DC resistance to ground. A series DC blocking capacitor should be used to avoid damage to the integrated transformer when DC voltage is present. The RF port is impedance matched from 2GHz to 14GHz as long as the LO is driven with a 0 ±6dBm source between 1GHz and 12GHz. VCC (Pin 9): Power Supply Pin. This pin must be externally connected to a regulated 3.3V supply, with a bypass capacitor located close to the pin. Typical current consumption is 115mA. LO (Pin 11): Input for the Local Oscillator (LO). The LO signal is applied through this pin. A series DC blocking capacitor should be used. Typical DC voltage at this pin is 1.6V. 5549fa For more information www.linear.com/LTC5549 11 LTC5549 Block Diagram 2 LTC5549 IF X2 5 LO AMP RF 11 LO MIXER CORE REF/BIAS 7 EN 8 X2 9 VCC GND PINS ARE NOT SHOWN. 12 5549 BD 5549fa For more information www.linear.com/LTC5549 LTC5549 Test Circuit IF 50Ω 3 2 GND 4 GND 1 IF GND LTC5549 GND 12 C5 RF 50Ω 13 GND 5 RF C1 ZO = 50Ω L = 1.4mm LO 50Ω LO 11 ZO = 50Ω L = 3.55mm 6 GND C4 GND 10 EN X2 VCC 7 8 9 EN X2 C3 C2 VCC (3.0V TO 3.6V) 5549 F01 REF DES VALUE SIZE VENDOR COMMENT C1, C4 0.15pF 0402 AVX ACCU-P 04021JR15ZBS C2, C5 22pF 0402 AVX C3 1µF 0603 AVX Figure 1. Standard Test Circuit Schematic IF 50Ω 3 GND 4 GND 2 IF 1 GND GND 12 LTC5549 C5 RF 50Ω 13 GND 5 RF C1 ZO = 50Ω L = 1.4mm LO 11 ZO = 50Ω L = 3.55mm 6 GND 7 EN (0V/3.3V) T2 (0V/3.3V) EN 8 X2 9 C4 LO 50Ω GND 10 VCC C2 C3 VCC (3.0V TO 3.6V) 5549fa 5549 F01 For more information www.linear.com/LTC5549 13 LTC5549 Applications Information Introduction LTC5549 RF 50Ω RF 5 C1 ZO = 50Ω L = 1.4mm 5549 F03 Figure 3. Simplified RF Port Interface Schematic 0 5 RETURN LOSS (dB) The LTC5549 consists of a high linearity double-balanced mixer core, LO buffer amplifier, LO frequency doubler and bias/enable circuits. See the Block Diagram section for a description of each pin function. The RF, LO and IF are single-ended terminals. The LTC5549 can be used as a frequency downconverter where the RF is used as an input and IF is used as an output. It can also be used as a frequency upconverter where the IF is used as an input and RF is used as an output. Low side or high side LO injection can be used. The evaluation circuit and the evaluation board layout are shown in Figure 1 and Figure 2, respectively. 10 15 20 LOW SIDE LO IF = 900MHz IF = 1890MHz IF = 4000MHz 25 30 2 3 4 5 6 7 9 10 11 12 13 14 8 RF FREQUENCY (GHz) 5549 F04a (a) 0 LOW SIDE LO IF = 900MHz IF = 1890MHz IF = 4000MHz 5549 F02 Figure 2. Evaluation Board Layout RETURN LOSS (dB) 5 10 15 20 25 RF Port 30 The mixer’s RF port, shown in Figure 3, is connected to the primary winding of an integrated transformer. The primary side of the RF transformer is DC-grounded internally and the DC resistance of the primary side is approximately 3.2Ω. A DC blocking capacitor is needed if the RF source has DC voltage present. The secondary winding of the RF transformer is internally connected to the mixer core. 35 The RF port is broadband matched to 50Ω from 2GHz to 14GHz with a 0.15pF shunt capacitor (C1) located 1.4mm away from the RF pin. The RF port is 50Ω matched from 2GHz to 10GHz without C1. An LO signal between –6dBm and 6dBm is required for good RF impedance matching. 14 2 3 4 5 6 7 8 9 10 11 RF FREQUENCY (GHz) 5549 F04a (b) Figure 4. RF Port Return Loss (a) C1 = 0.15pF (b) C1 Open The measured RF input return loss is shown in Figure 4 for IF frequencies of 900MHz, 1890MHz and 4GHz. LO Input The mixer’s LO input circuit, shown in Figure 5, consists of a single-ended to differential conversion, high speed 5549fa For more information www.linear.com/LTC5549 LTC5549 Applications Information The IF port is broadband matched to 50Ω from 500MHz to 6GHz. An LO signal between -6dBm and 6dBm is required for good IF impedance matching. Frequencies outside of this range can be used with degraded performance. LTC5549 X2 C5 LO LOIN 11 The measured IF port return loss is shown in Figure 8. C4 0 X2 = LOW, EN = HIGH X2 = LOW, EN = LOW X2 = HIGH, EN = HIGH 8 X2 9 VCC 5549 F05 Figure 5. Simplified LO Input Schematic limiting differential amplifier and an LO frequency doubler. The LTC5549’s LO amplifier is optimized for the 1GHz to 12GHz LO frequency range. LO frequencies above or below this frequency range may be used with degraded performance. The LO frequency doubler is controlled by a digital voltage input at X2 (Pin 8). When the X2 voltage is higher than 1.2V, the LO frequency doubler is enabled. When X2 is left open or its voltage is lower than 0.5V, the LO frequency doubler is disabled. RETURN LOSS (dB) 5 The mixer’s IF port, shown in Figure 7, is connected to the primary winding of an integrated transformer. The primary side of the IF transformer is DC-grounded internally and the DC resistance is approximately 6.2Ω. A DC blocking capacitor is needed if the IF source has DC voltage present. The secondary winding of the IF transformer is internally connected to the mixer core. 20 30 1 2 3 4 5 6 7 8 9 10 11 12 13 LO FREQUENCY (GHz) 5549 F06 Figure 6. LO Input Return Loss LTC5549 IF 2 IF 5549 F07 Figure 7. Simplified IF Port Interface Schematic 0 5 10 RETURN LOSS (dB) IF Port 15 25 The mixer’s LO input is connected to a singled-ended to differential buffer and ESD devices. The DC voltage at the LO input is about 1.6V. A DC blocking capacitor is required for the LO circuit to operate properly. The LO is 50Ω matched from 1GHz to 12GHz. With a 0.15pF shunt capacitor (C4) located 3.55mm away from the LO pin. The LO port is 50Ω matched from 1GHz to 8.4GHz without C4. External matching components may be needed for extended LO operating frequency range. The measured LO input return loss is shown in Figure 6. The nominal LO input level is 0dBm, although the limiting amplifiers will deliver excellent performance over a ±6dBm input power range. 10 15 20 25 30 35 40 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 For more information www.linear.com/LTC5549 IF FREQUENCY (GHz) 5549 F08 Figure 8. IF Port Return Loss 5549fa 15 LTC5549 Applications Information Enable Interface Figure 9 shows a simplified schematic of the EN pin interface. To enable the chip, the EN voltage must be higher than 1.2V. The voltage at the EN pin should never exceed VCC by more than 0.3V. If this should occur, the supply current could be sourced through the ESD diode, potentially damaging the IC. If the EN pin is left floating, its voltage will be pulled low by the internal pull-down resistor and the chip will be disabled. X2 Interface Figure 10 shows a simplified schematic of the X2 pin interface. To enable the integrated LO frequency doubler, 9 7 VCC EN the X2 voltage must be higher than 1.2V. The X2 voltage at the pin should never exceed VCC by more than 0.3V. If this should occur, the supply current could be sourced through the ESD diode, potentially damaging the IC. If the X2 pin is left floating, its voltage will be pulled low by the internal pull-down resistor and the LO frequency doubler will be disabled. 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. LTC5549 9 BIAS 8 5549 F09 Figure 9. Simplified Enable Input Circuit 16 VCC LTC5549 X2 5549 F10 Figure 10. Simplified X2 Interface Circuit 5549fa For more information www.linear.com/LTC5549 LTC5549 Typical Application Due to the wideband nature of the RF, LO and IF ports, the LTC5549 may be used as an upmixer even when the lower (IF) input frequency is applied to the RF port and the higher (RF) output is taken from the IF port. Operation in this manner only requires that the input and output frequencies are within the specified frequency ranges. One example is shown in Figure 11, where the RF input ranges from 1.6GHz to 4.5GHz and the IF output is 5.2GHz. LTC5549 1.6GHz to 4.5GHz RF 5.2GHz IF LO 3.6GHz to 0.7GHz 5549 F11a (a) Application Configuration CONVERSION LOSS (dB), IIP3 (dBm) 30 28 26 IIP3 24 22 20 18 16 14 12 CONVERSION LOSS 10 8 1.5 2 2.5 3 3.5 4 4.5 INPUT FREQUENCY (GHz) 5549 F11b (b) Conversion Loss and IIP3 vs Input Frequency (Low Side LO, Output = 5.2GHz) Figure 11. An Upmixer Application with Input at the RF Port and Output at the IF Port 5549fa For more information www.linear.com/LTC5549 17 LTC5549 Package Description Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings. UDB Package Variation A 12-LeadUDB Plastic QFN (3mm × 2mm) Package (Reference Variation: LTC DWG # 05-08-1985 Rev Ø) A 12-Lead Plastic QFN (3mm × 2mm) (Reference LTC DWG # 05-08-1985 Rev Ø) 0.25 ±0.05 0.85 ±0.05 0.65 ±0.05 0.77 ±0.05 0.05 REF 2.50 ±0.05 DETAIL B DETAIL B 0.25 ±0.10 PACKAGE OUTLINE 0.25 ±0.05 0.50 BSC 0.75 ±0.05 0.77 ±0.10 0.05 REF DETAIL A 3.50 ±0.05 RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED R = 0.13 TYP 10 12 0.15 REF 0.60 ±0.10 0.40 ±0.10 9 1 0.40 REF 7 0.40 ±0.10 3 2.00 ±0.10 6 3.00 ±0.10 0.50 ±0.10 0.75 ±0.05 0.20 REF 4 DETAIL A 0.50 ±0.10 (UDB12) DFN 0814 REV 0 0.25 ±0.05 0.50 BSC BOTTOM VIEW—EXPOSED PAD SIDE VIEW 0.00 – 0.05 NOTE: 1. DRAWING IS NOT A JEDEC PACKAGE OUTLINE 2. DRAWING NOT TO SCALE 3. ALL DIMENSIONS ARE IN MILLIMETERS 4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE 5. EXPOSED PAD SHALL BE SOLDER PLATED 6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE TOP AND BOTTOM OF PACKAGE 18 5549fa For more information www.linear.com/LTC5549 LTC5549 Revision History REV DATE DESCRIPTION A 9/15 Order part number correction. PAGE NUMBER 2 5549fa 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. For more information www.linear.com/LTC5549 19 LTC5549 Typical Application 5GHz to 14GHz Downconversion 30 LTC5549 RF 0.15pF IF 4GHz CONVERSION LOSS (dB), IIP3 (dBm) 5GHz to 14GHz ZO = 50Ω L = 1.4mm Conversion Loss and IIP3 vs Input Frequency (Low Side LO, IF = 4GHz) LO ZO = 50Ω L = 3.55mm 22pF 0.15pF 1GHz to 10GHz 28 IIP3 26 24 22 20 DOWNMIXING UPMIXING 18 16 14 12 10 CONVERSION LOSS 8 6 5549 TA02a 5 6 7 8 9 10 11 12 13 14 RF FREQUENCY (GHz) 5549 TA02b Related Parts PART NUMBER DESCRIPTION COMMENTS Mixers and Modulators LTC5551 300MHz to 3.5GHz Ultrahigh Dynamic Range Downconverting Mixer +36dBm IIP3; 2.4dB Gain, <10dB NF, 0dBm LO Drive, +18dBm P1dB, 670mW Power Consumption LTC5567 400MHz to 4GHz, Active Downconverting Mixer 1.9dB Gain, 26.9dBm IIP3 and 11.8dB NF at 1950MHz, 3.3V/89mA Supply LTC5577 300MHz to 6GHz High Signal Level Active Downconverting Mixer 50Ω Matched Input from 1.3GHz to 4.3GHz, 30dBm IIP3, 0dB Gain, >40dB LO-RF Isolation, 0dBm LO Drive LTC5510 1MHz to 6GHz Wideband High Linearity Active Mixer 50Ω Matched Input from 30MHz to 6GHz, 27dBm OIP3, 1.5dB Gain, Up- or Down-Conversion LTC5544 4GHz to 6GHz Downconverting Mixer 7.5dB Gain, >25dBm IIP3 and 10dB NF, 3.3V/200mA Supply LT5578 400MHz to 2.7GHz Upconverting Mixer 27dBm OIP3 at 900MHz, 24.2dBm at 1.95GHz, Integrated RF Output Transformer LT5579 1.5GHz to 3.8GHz Upconverting Mixer 27.3dBm OIP3 at 2.14GHz, NF = 9.9dB, 3.3V Supply, Single-Ended LO and RF Ports LTC5576 3GHz to 8GHz High Linearity Active Upconverting Mixer 25dBm OIP3, –0.6dB Gain, 14.1dB NF, –154dBm/Hz Output Noise Floor, –28dBm LO Leakage at 8GHz LTC6430-20 High Linearity Differential IF Amp 20MHz to 2GHz Bandwidth, 20.8dB Gain, 51dBm OIP3, 2.9dB NF at 240MHz LTC6431-20 High Linearity Single-Ended IF Amp 20MHz to 1.4GHz Bandwidth, 20.8dB Gain, 46.2dBm OIP3, 2.6dB NF at 240MHz Amplifiers RF Power Detectors LTC5564 15GHz Ultra Fast 7ns Response Time RF Detector with Comparator 600MHz to 15GHz, –24dB to 16dBm Input Power Range, 9ns Comparator Response Time, 125°C Version LT5581 6GHz Low Power RMS Detector 40dB Dynamic Range, ±1dB Accuracy Over Temperature, 1.5mA Supply Current LTC5582 40MHz to 10GHz RMS Detector ±0.5dB Accuracy Over Temperature, ±0.2dB Linearity Error, 57dB Dynamic Range LTC5583 Dual 6GHz RMS Power Detector Up to 60dB Dynamic Range, ±0.5dB Accuracy Over Temperature, >50dB Isolation RF PLL/Synthesizer with VCO LTC6948 Ultralow Noise, Low Spurious Frac-N PLL with Integrated VCO 20 Linear Technology Corporation 373MHz to 6.39GHz, –157dBc/Hz WB Phase Noise Floor, –274dBc/Hz Normalized In-Band 1/f Noise 1630 McCarthy Blvd., Milpitas, CA 95035-7417 For more information www.linear.com/LTC5549 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com/LTC5549 5549fa LT 0915 REV A • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 2015