Linear Technology LTC5510 Demo Manual

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Page 1

Description

DEMO MANUAL DC1984A

LTC5510

1MHz to 6GHz Wideband

High Linearity Active Mixer

Demonstration circuit 1984A showcases the LT C®5510. wideband high linearity active mixer for VHF/UHF upmixer applications, where a 70MHz input signal is upconverted to the 100MHz to 1GHz output range. Its input port is

optimized for 30MHz to 2.6GHz, and its output port is optimized for 10MHz to 1.3GHz. The LO input can be

either high side or low side.

Another demonstration circuit, the DC1983A, utilizing a multilayer chip hybrid balun, is designed for evaluating the LTC5510 for wideband up/downmixer applications with 30MHz to 3GHz input and 1.2GHz to 2.1GHz output.

DEMO BOARD INPUT RANGE LO RANGE OUTPUT RANGE

DC1983A 30MHz to 3GHz 5MHz to 6GHz 1.2GHz to 2.1GHz

DC1984A 30MHz to 2.6GHz 5MHz to 6GHz 10MHz to 1.3GHz

Specifications are at TC = 25°C, VCC = 5V, EN = High, PLO = 0dBm,

performance summary

PIN = –10dBm (–10dBm/tone for two-tone tests), unless otherwise noted. (Note 1)

PARAMETER CONDITIONS VALUE UNITS

Input Frequency Range 30 to 2600 MHz

Output Frequency Range 10 to 1300 MHz

LO Input Frequency Range 5 to 6000 MHz

LO Input Power Range –6 to 6 dBm

Supply Voltage Range 5V Supply, R1 = Open (Default Configuration)

Supply Current 5V Supply, R1 = Open (Default Configuration)

Total Supply Current During Shutdown EN = Low 1.3 mA

EN Input High Voltage (On) >1.8 V

EN Input Low Voltage (Off) < 0.5 V

EN Input Current –0.3V to V

Turn-On Time EN: Low to High 0.6 µs

Turn-Off Time EN: High to Low 0.6 µs

Temperature Monitor Pin (TEMP) DC Voltage at TJ = 25°C

Temperature Monitor Pin (TEMP) Voltage Temperature Coefficient

3.3V Supply, R1 = 2kΩ

+ 0.3V –20 to 200 µA

= 10µA

IIN = 80µA

= 10µA

IIN = 80µA

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 double-balanced active mixer with an 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 perfor mance. 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/DC1984A

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.

4.5 to 5.3

3.1 to 3.5

98 90

697 755

–1.80 –1.61

mA mA

mV mV

mV/°C mV/°C

V V

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DEMO MANUAL DC1984A

Specifications are at TC = 25°C, VCC = 5V, EN = High, PLO = 0dBm,

performance summary

PIN = –10dBm (–10dBm/tone for two-tone tests), unless otherwise noted. (Note 1)

PARAMETER CONDITIONS VALUE UNITS

5V VHF/UHF Upmixer Application: f

Conversion Gain f

Tw o -Tone Output 3rd Order Intercept (Δf = 2MHz) f

SSB Noise Figure f

SSB Noise Floor at P

LO-IN Leakage f

LO-OUT Leakage f

IN-OUT Isolation f

IN-LO Isolation f

Input 1dB Compression f

Note 1: Subject to change without notice. Refer to the latest LTC5510 data sheet for the most up-to-date specifications.

= 5dBm fIN = 44MHz, fLO = 532MHz, f

= 70MHz, f

= 100MHz to 1000MHz, fLO = fIN + f

OUT

= 456MHz 1.1 dB

OUT

= 456MHz 29.0 dBm

OUT

= 456MHz 11.3 dB

OUT

= 100MHz to 1500MHz < –62 dBm

= 100MHz to 1500MHz < –39 dBm

= 50MHz to 400MHz > 43 dB

= 50MHz to 400MHz > 70 dB

= 456MHz 11.0 dBm

OUT

= 462MHz –152 dBm/Hz

OUT

absolute maximum ratings

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.

Supply Voltage (V

) ...............................................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 Temper ature Range (TC) ........ –40°C to 105°C

DetaileD Description

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 volt age transient that exceeds the maximum rating. A supply voltage ramp time of greater than 1ms is recommended.

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.

Do not clip powered test leads directly onto the demon stration circuit’s VCC and EN turrets. Instead, make all

necessary connections with power supplies turned off, then increase to operating voltage.

For best overall temperature performance, the external bias adjustment resistor, R1, should be left open for 5V supply and set to 2kΩ for 3.3V supply. By default, dem onstration circuit 1984A is configured for 5V supply, and R1 is not installed.

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dc1984a F01

VD− 742.4

–1.796

VD− 795.6

–1.609

DetaileD Description

dc1984a F03

DEMO MANUAL DC1984A

Enable Function

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.

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=

80μA forced current:

TJ=

LO Port

Demonstration Circuit 1984A’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.

–6

–12

–18

RETURN LOSS (dB)

–24

–30

FREQUENCY (MHz)

ON (EN = HI)

OFF (EN = LOW)

4000300020001000 5000

dc1984a F02

Figure 2. LO Port Return Loss

OUT Port

Where TJ is the junction temperature in °C, and VD is the TEMP pin voltage in mV.

IN Port

Demonstration Circuit 1984A’s IN port is broadband matched to 50Ω from 30MHz to 2.6GHz.

–6

–12

–18

RETURN LOSS (dB)

–24

–30

FREQUENCY (MHz)

Figure 1. IN Port Return Loss

4000300020001000

Demonstration Circuit 1984A utilizes a wideband transmis sion line type transformer at the output port. The output port is well matched to 50Ω from 10MHz to 1.3GHz.

–6

–12

–18

RETURN LOSS (dB)

–24

–30

0 1200900600300 1500

FREQUENCY (MHz)

Figure 3. OUT Port Return Loss

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DEMO MANUAL DC1984A

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 har monic 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 has 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 ZHL1042J, 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 V

on the demon-

SWR

stration circuit’s input and output ports to improve source and load match to reduce reﬂections, which may degrade measurement accuracy.

5. A high dynamic range spectrum analyzer, such as the Rohde & Schwarz FSEM30,

should be used for

linearity measurement.

50Ω TERMINATION

NETWORK ANALYZER

Figure 4. Proper Equipment Setup for Return Loss Measurements

–

50Ω TERMINATION

5V DC POWER SUPPLY

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DEMO MANUAL DC1984A

measurement equipment anD setup

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.

SIGNAL

GENERATOR

6dB

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 mini

mized.

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.

SIGNAL

GENERATOR

SIGNAL

GENERATOR

MINI-CIRCUITS

ZHL-1042J

MINI-CIRCUITS

ZHL-1042J

3dB

MINI-CIRCUITS ZFSC-2-372-S+

3dB

Figure 5. Proper Equipment Setup for RF Performance Measurements

–

SPECTRUM

ANALYZER

5V DC POWER SUPPLY

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DEMO MANUAL DC1984A

measurement equipment anD setup

SIGNAL

GENERATOR

BPF 6dB

NOISE

SOURCE

BPF 3dB

NOISE FIGURE METER

BPF3dB

Figure 6. Proper Equipment Setup for Noise Figure Measurement

quick start proceDure

Demonstration circuit 1984A 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 mea surement, set appropriate frequency range, and set the test signal to 0dBm.

5V DC POWER SUPPLY

–

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 V

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.

and GND

2. Calibrate the Network Analyzer.

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quick start proceDure

∆IM3

DEMO MANUAL DC1984A

RF Performance Measurements

1. Connect all test equipment as shown in Figure 5, with the signal generators and the DC power supply turned off.

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 V terminals to account for test lead ohmic losses.

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.

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 =

+ P

OUT

and GND

Where ΔIM3 = P output signal power. P modulation product power.

7. Turn off one of the RF signal generators, and measure conversion gain, IN-OUT isolation, LO-OUT leakage, and input 1dB compression point.

Noise Figure Measurement

1. Conﬁgure and calibrate the noise ﬁgure meter for mixer measurements.

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 V terminals to account for test lead ohmic losses.

4. Measure the single-sideband noise ﬁgure.

OUT

– P

. P

IM3

is the lowest fundamental

OUT

is the highest 3rd order inter-

and GND

pcb layout

Layer 1, Top Layer

Layer 2, Ground Layer

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DEMO MANUAL DC1984A

pcb layout

Layer 3, Power Layer

Layer 4, Bottom Layer

parts list

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Required Circuit Components

1 4 C1, C2, C4, C5 CAP, 0402, X7R, 16V, 0.1µF, 10% MURATA, GRM155R71C104KA88D

2 1 C3 CAP, 0402, C0G, 50V, 0.5pF, ±0.1pF MURATA, GJM1555C1HR50BB01D

3 1 C6 CAP, 0603, X7R, 16V, 1µF, 10% MURATA, GRM188R71C105KA12D

4 4 C7, C8, C9, C10 CAP, 0402, X7R, 16V, 10nF, 10% MURATA, GRM155R71C103KA01D

5 4 E1, E2, E3, E4 TESTPOINT, TURRET, 0.094" MILL-MAX, 2501-2-00-80-00-00-07-0

6 3 J1, J2, J3 CONN, SMA, 50Ω, EDGE-LAUNCH E.F. JOHNSON, 142-0701-851

7 0 J4 CONN, OPTION

8 0 L1, L2 IND, 0603, OPTION

9 1 L3 IND, 0603, WIRE-WOUND, 220nH, 2% COILCRAFT, 0603HP-R22XGLU

10 2 L4, L5 IND, 0402, WIRE-WOUND, 15nH, 2% COILCRAFT, 0402HP-15NXGLU

11 0 R1 RES, 0402, OPTION

12 1 T1 XFMR, 1:1, 4.5-3000MHz MINI-CIRCUITS, TC1-1-13M+

13 1 T2 XFMR, 4:1, 10-1900MHz MINI-CIRCUITS, TC4-19LN+

14 1 U1 IC, LTC5510IUF#PBF, QFN 4mm × 4mm LINEAR TECHNOLOGY, LTC5510IUF#PBF

15 1 FAB, PRINTED CIRCUIT BOARD DEMO CIRCUIT 1984A

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schematic Diagram

7-09-13

SUNNY H.PRODUCTION2

OUT+

DEMO MANUAL DC1984A

www.linear.com

OPT

OUT-

www.linear.com

SHEET OF

10nF

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

REVISION HISTORY

DESCRIPTION DATEAPPROVEDECO REV

4:1 XFMR

MINI-CIRCUITS

TC4-19LN+

OPT

GND

LO-

LO+

0603

GND

TEMP1IN+2IN-3LGND

15nH

0.1uF

OUT+

LTC5510IUF

10nF

OUT-

OPT

0603

C10

GND

10nF

15nH

GND

IADJ

VCC2

VCC1

OPT

220nH

0603

VCC

4.5V - 5.3V

GND

1uF

0603

10nF

Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

Fax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

LTC5510IUF

DEMO CIRCUIT 1984A

TECHNOLOGY

SCHEMATIC

TITLE:

A.K.

SUNNY H.

APPROVALS

PCB DES.

APP ENG.

CUSTOMER NOTICE

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

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

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

DEMO CIRCUIT 1984A

Tuesday, July 09, 2013

IC NO. REV.

WIDEBAND ACTIVE MIXER, LOW FREQUENCY OUTPUT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

N/A

SIZE

DATE:

SIZE

DATE:

SIZE

DATE:

SCALE = NONE

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.

D D

TEMP

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.

0.1uF

0.5pF

OPEN

2.0K

1:1 XFMR

MINI-CIRCUITS

TC1-1-13M+

3 412

4.5V - 5.3V

3.1V - 3.6V

VCC RANGE

VCC RANGE R1

3.3V

5V (DEFAULT)

NOTE: UNLESS OTHERWISE SPECIFIED

1. ALL COMPONENTS ARE 0402 SIZE

C C

B B

A A

dc1984af

Page 10

DEMO MANUAL DC1984A

DEMONSTRATION BOARD IMPORTANT NOTICE

Linear Technology Corporation (LT C ) 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 LT C 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 LT C 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. LT C assumes no liability for applications assistance,

customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind.

LT C 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 LT C application engineer.

Mailing Address:

Linear Technology

1630 McCarthy Blvd.

Milpitas, CA 95035

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com

dc1984af

LT 0713 • PRINTED IN USA

 LINEAR TECHNOLOGY CORPORATION 2013