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dc2461af

DEMO MANUAL DC2461A

Description

Absolute MAxiMuM input 

rAtings

LTC5548 

2GHz to 14GHz Microwave 

Mixer with Low IF Frequency 

Demonstration circuit 2461A is optimized for evaluation 

of the 

LTC

®

5548

 passive double-balanced mixer with 

integrated LO frequency doubler. Its RF port is matched 

to 50Ω from 2GHz to 13.6GHz with 9dB return loss, and 

the LO port is matched to 50Ω from 1GHz to 12GHz with 

10dB return loss. The differential IF port is usable from 

DC to 6GHz. The LTC5548 can be used for upconverting 

and downconverting applications.
The internal LO doubler can be enabled to allow operation 

with a lower frequency LO input signal such as that from 

the 

LTC6945/LTC6946

 or 

LTC6947/LTC6948

 family of 

frequency synthesizers.

Design files for this circuit board are available at  

http://www.linear.com/demo/DC2461A

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.

boArD lAyout

Figure 1. DC2461A

Supply Voltage (EN) ....................................................4V

Enable Input Voltage (EN) ................–0.3V to V

CC

 + 0.3V

LO Input Power (1GHz to 12GHz) .........................10dBm

LO Input DC Voltage ............................................... ±0.1V

RF Input Power (2GHz to 14GHz) .........................20dBm

RF Input DC Voltage ............................................... ±0.1V

IF Input Power (LF to 6GHz) .................................20dBm

IF Input DC Voltage ................................................ ±0.1V

Operating Temperature Range (T

C

) ........ –40°C to 105°C

Junction Temperature (T

J

) .................................... 150°C

Storage Temperature Range .................. –65°C to 150°C

Caution: This part is sensitive to electrostatic discharge 

(ESD). Observe proper ESD precautions when handling 

the LTC5548.

Summary of Contents for DC2461A

Page 1: ...ying on the information therein All referenced brands product names service names and trademarks are the property of their respective owners 00000005981LF 000 EOS Power Buy Now We have 45 000 LP502030 PCM NTC LD A02554 EEMB Lithium Battery Rectangular 3 7V 250mAh Rechargeable in stock now Starting at 0 034 This EEMB part is fully warrantied and traceable 1 855 837 4225 Give us a call International...

Page 2: ...as that from the LTC6945 LTC6946 or LTC6947 LTC6948 family of frequency synthesizers Design files for this circuit board are available at http www linear com demo DC2461A 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 Board Layout Figure 1 DC2461A Supply Voltage EN 4V Ena...

Page 3: ...2 dc2461af DEMO MANUAL DC2461A Proper Test Setups Figure 2 Test Setup for Downconverting Mixer 2 Tone Measurements Figure 3 Test Setup for Upconverting Mixer 2 Tone Measurements ...

Page 4: ...lyzer used Before performing measurements on the DUT the systemperformanceshouldbeevaluatedtoensurethat a clean input signal is obtained and that the spectrum analyzer s internal distortion is minimized 1 Connect all test equipment as shown in Figure 2 2 Set the power supply output voltage to 3 3V and set the current limit to 200mA 3 Connect the ground and VCC turrets to the power sup ply BESURETO...

Page 5: ... C4 CAP 22pF C0G 50V 5 0402 AVX 04025A220JAT2A 3 1 C5 CAP 1µF X7R 10V 10 0603 AVX 0603ZD105KAT2A 4 4 E1 TO E4 TEST POINT TURRET 0 061 MTG HOLE MILL MAX 2308 2 00 80 00 00 07 0 5 3 J1 TO J3 CONN SMA 50Ω EDGE LAUNCH E F JOHNSON 142 0701 851 6 1 T1 TRANS MINI CIRCUITS 4 5MHz TO 3000MHz MINI CIRCUITS TC1 1 13M 7 1 U1 IC LTC5548IUDB QFN 12 PIN 3mm 2mm LINEAR TECHNOLOGY CORPORATION LTC5548IUDB PBF ...

Page 6: ...logy Corporation makes no representa tion that the interconnection of its circuits as described herein will not infringe on existing patent rights Schematic Diagram 5 5 4 4 3 3 2 2 1 1 VCC E4 J3 IF T1 6 3 4 1 2 C5 1uF 1 2 J2 LO E2 GND E3 J1 RF C2 22pF 1 2 U1 LTC5548 GND 1 IF 2 IF 3 GND 4 RF 5 GND 6 EN 7 X2 8 VCC 9 GND 10 LO 11 GND 12 GND 13 C1 0 15pF 1 2 E1 Vcc C3 0 15pF 1 2 C4 22pF 1 2 ...

Page 7: ...ORY 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...

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