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50 MHz to 6 GHz RF/IF Gain Block ADL5542
FEATURES
Fixed gain of 20 dB Operation up to 6 GHz Input/output internally matched to 50 Integrated bias control circuit Output IP3 46 dBm at 500 MHz 40 dBm at 900 MHz Output 1 dB compression: 20.6 dB at 900 MHz Noise figure of 3 dB at 900 MHz Single 5 V power supply Small footprint 8-lead LFCSP Pin compatible with 15 dB gain ADL5541 1 kV ESD (Class 1C)
FUNCTIONAL BLOCK DIAGRAM
INPUT MATCH OUTPUT MATCH
RFIN 1 GND 2 GND 3
8
RFOUT GND GND VPOS
06879-001
BIAS CONTROL
7
6
ADL5542
CB 4
5
Figure 1.
GENERAL DESCRIPTION
The ADL5542 is a broadband 20 dB linear amplifier that operates at frequencies up to 6 GHz. The device can be used in a wide variety of CATV, cellular, and instrumentation equipment. The ADL5542 provides a gain of 20 dB that is stable over frequency, temperature, power supply, and from device to device. The device is internally matched to 50 with an input return loss of 10 dB or better, up to 6 GHz. Only input/output ac coupling capacitors, power supply decoupling capacitors, and an external inductor are required for operation. The ADL5542 is fabricated on an InGaP HBT process and has an ESD rating of 1 kV (Class 1C). The device is packaged in a 3 mm x 3 mm LFCSP that uses an exposed paddle for excellent thermal impedance. The ADL5542 consumes 93 mA on a single 5 V supply and is fully specified for operation from -40C to +85C. A fully populated RoHS-compliant evaluation board is available. The ADL5541 is a companion part that offers a gain of 15 dB in a pin-compatible package.
Rev. A
Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 (c)2007 Analog Devices, Inc. All rights reserved.
ADL5542 TABLE OF CONTENTS
Features .............................................................................................. 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Typical Scattering Parameters ..................................................... 5 Absolute Maximum Ratings............................................................ 6 ESD Caution .................................................................................. 6 Pin Configuration and Function Descriptions ............................. 7 Typical Performance Characteristics ..............................................8 Basic Connections .......................................................................... 10 Soldering Information and Recommended PCB Land Pattern ....................................................................... 10 Evaluation Board ............................................................................ 11 Outline Dimensions ....................................................................... 12 Ordering Guide .......................................................................... 12
REVISION HISTORY
10/07--Rev. 0 to Rev. A Changes to Figure 4 .......................................................................... 8 Change to Basic Connections Section ......................................... 10 Changes to Table 5 .......................................................................... 10 Change to Table 6 ........................................................................... 11 Deleted Notes from Ordering Guide Section ............................. 12 7/07--Revision 0: Initial Version
Rev. A | Page 2 of 12
ADL5542 SPECIFICATIONS
VPOS = 5 V and TA = 25C, unless otherwise noted. Table 1.
Parameter OVERALL FUNCTION Frequency Range Gain (S21) Input Return Loss (S11) Output Return Loss (S22) Reverse Isolation (S12) FREQUENCY = 100 MHz Gain Output 1 dB Compression Point Output Third-Order Intercept Noise Figure FREQUENCY = 500 MHz Gain vs. Frequency vs. Temperature vs. Supply Output 1 dB Compression Point Output Third-Order Intercept Noise Figure FREQUENCY = 900 MHz Gain vs. Frequency vs. Temperature vs. Supply Output 1 dB Compression Point Output Third-Order Intercept Noise Figure FREQUENCY = 2000 MHz Gain vs. Frequency vs. Temperature vs. Supply Output 1 dB Compression Point Output Third-Order Intercept Noise Figure FREQUENCY = 2400 MHz Gain vs. Frequency vs. Temperature vs. Supply Output 1 dB Compression Point Output Third-Order Intercept Noise Figure Conditions Min 50 900 MHz Frequency 500 MHz to 5 GHz Frequency 500 MHz to 5 GHz 19.7 -15 -10 -22 20.2 19.6 38 2.7 18.4 50 MHz -40C TA +85C 4.75 V to 5.25 V f = 1 MHz, output power (POUT) = 3 dBm per tone 19.5 0.15 0.1 0.02 20.6 46 2.8 19.7 0.03 0.14 0.02 20.6 40 3.0 18.7 0.05 0.23 0.04 18 39 3.2 18.3 0.05 0.24 0.04 16.8 38 3.5 20.8 Typ Max 6000 Unit MHz dB dB dB dB dB dBm dBm dB dB dB dB dB dBm dBm dB dB dB dB dB dBm dBm dB dB dB dB dB dBm dBm dB dB dB dB dB dBm dBm dB
f = 1 MHz, output power (POUT) = 0 dBm per tone
3.2 20.8
19.2 50 MHz -40C TA +85C 4.75 V to 5.25 V f = 1 MHz, output power (POUT) = 0 dBm per tone
3.3 19.4
18 50 MHz -40C TA +85C 4.75 V to 5.25 V f = 1 MHz, output power (POUT) = 0 dBm per tone
3.6 18.9
17.7 50 MHz -40C TA +85C 4.75 V to 5.25 V f = 1 MHz, output power (POUT) = 0 dBm per tone
3.8
Rev. A | Page 3 of 12
ADL5542
Parameter FREQUENCY = 3500 MHz Gain vs. Frequency vs. Temperature vs. Supply Output 1 dB Compression Point Output Third-Order Intercept Noise Figure FREQUENCY = 5800 MHz Gain vs. Frequency vs. Temperature vs. Supply Output 1 dB Compression Point Output Third-Order Intercept Noise Figure POWER INTERFACE Supply Voltage (VPOS) Supply Current vs. Temperature Power Dissipation Conditions Min 15.9 50 MHz -40C TA +85C 4.75 V to 5.25 V f = 1 MHz, output power (POUT) = 0 dBm per tone Typ 17.5 0.04 0.31 0.04 13.7 33 3.7 12.7 0.03 1.2 0.04 6.8 24.2 5.7 5 93 15 0.5 Max 18.8 Unit dB dB dB dB dBm dBm dB dB dB dB dB dBm dBm dB V mA mA W
4.3 14.4
11.2 50 MHz -40C TA +85C 4.75 V to 5.25 V f = 1 MHz, output power (POUT) = 0 dBm per tone Pin VPOS 4.5 -40C TA +85C VPOS = 5 V
6.3 5.5 115
Rev. A | Page 4 of 12
ADL5542
TYPICAL SCATTERING PARAMETERS
VPOS = 5 V and TA = 25C, the effects of the test fixture have been de-embedded up to the pins of the device. Table 2.
Freq. (MHz) 50 100 500 900 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 Magnitude (dB) -23.9427 -29.6174 -34.5211 -37.74 -33.8877 -24.7749 -17.038 -9.60208 -8.00289 -7.91011 -12.816 -17.625 -12.8458 -10.9468 -5.69808 Angle () -127.394 -153.6 +19.99577 +147.4543 +131.3191 -152.311 +178.4399 +153.1961 +128.6464 +103.6543 +96.79933 +156.5961 +173.0378 -154.419 -150.164 Magnitude (dB) 20.77572 20.51771 20.23355 20.07428 20.07369 19.80607 19.5708 19.26227 18.82098 18.18117 17.38515 17.57137 16.39804 15.13047 13.48849 Angle () +170.5022 +170.3216 +152.6774 +132.0556 +127.0206 +101.2591 +76.03876 +49.85321 +24.3132 -1.63173 -26.2863 -52.0317 -77.6904 -102.402 -125.082 Magnitude (dB) -23.0076 -22.6572 -22.5262 -22.4939 -22.4386 -22.3087 -21.9922 -21.6433 -21.0921 -21.2002 -20.7711 -20.0291 -19.9498 -19.8825 -20.3196 Angle () +3.044077 +1.38839 -10.9886 -21.2573 -23.7005 -35.6482 -48.9813 -60.9072 -76.3162 -91.6973 -103.208 -120.789 -136.697 -153.753 -170.25 Magnitude (dB) -23.9476 -32.4194 -26.2358 -20.2616 -20.323 -16.2712 -12.759 -9.74244 -8.77595 -10.5739 -13.1628 -7.31571 -6.22666 -9.89228 -10.7825 Angle () -132.996 -124.454 -129.115 -159.271 -160.866 +168.1644 +164.7149 +150.6577 +128.7323 +90.37487 +8.899607 -73.4032 -106.102 -111.644 -57.0274
Rev. A | Page 5 of 12
ADL5542 ABSOLUTE MAXIMUM RATINGS
Table 3.
Parameter Supply Voltage, VPOS Input Power (re: 50 ) Internal Power Dissipation (Paddle Soldered) JC (Junction to Paddle) Maximum Junction Temperature Operating Temperature Range Storage Temperature Range Rating 6.5 V 10 dBm 650 mW 28.5C/W 150C -40C to +85C -65C to +150C
ESD CAUTION
Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Rev. A | Page 6 of 12
ADL5542 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
RFIN 1 GND 2 GND 3 CB 4
PIN 1 INDICATOR
8 RFOUT 7 GND 6 GND 5 VPOS
06879-002
ADL5542
TOP VIEW (Not to Scale)
Figure 2. Pin Configuration
Table 4. Pin Function Descriptions
Pin No. 1 2, 3, 6, 7 4 5 8 Exposed Paddle Mnemonic RFIN GND CB VPOS RFOUT Description RF Input. Requires a dc blocking capacitor. Ground. Connect these pins to a low impedance ground plane. Low Frequency Bypass. A 1 F capacitor should be connected between this pin and ground. Power Supply for Bias Controller. Connect directly to external power supply. RF Output and Supply Voltage. DC bias is provided to this pin through an inductor that is tied to the external power supply. RF path requires a dc blocking capacitor. Exposed Paddle. Internally connected to GND. Solder to a low impedance ground plane.
Rev. A | Page 7 of 12
ADL5542 TYPICAL PERFORMANCE CHARACTERISTICS
45 40
50 45
GAIN, P1dB, OIP3, NF (dB, dBm)
OIP3 (0dBm) 35
40
OIP3 (+25C) OIP3 (-40C)
OIP3 AND P1dB (dBm)
30 25 20 15 P1dB 10
06879-003
35 30 25 20 15 10 P1dB (+25C) P1dB (+85C) OIP3 (+85C)
GAIN
5 0 0.5
NF
5
P1dB (-40C)
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
0 0.5 0.9 1.3 1.7 2.1 2.5 2.9 3.3 3.7 4.1 4.5 4.9 5.3 5.7 FREQUENCY (GHz)
FREQUENCY (GHz)
Figure 3. Gain, P1dB, OIP3, and Noise Figure vs. Frequency
20 19
Figure 6. OIP3 and P1dB vs. Frequency and Temperature
50
45
18 -40C 17 +85C
500MHz 40 900MHz
GAIN (dB)
16 15 14 13 12 11 10 0.5 0.9 1.3 1.7 2.1 2.5 2.9 3.3 3.7 4.1 4.5 4.9 5.3 5.7 FREQUENCY (GHz)
06879-004
OIP3 (dBm)
35
2.4GHz 2GHz
+25C
30 3.5GHz 25 20 15 -3
0
3
6
9
12
15
18
POUT (dBm)
Figure 4. Gain vs. Frequency and Temperature
Figure 7. OIP3 vs. Output Power (POUT) and Frequency
0 -5 S22 -10
8
7
NOISE FIGURE (dB)
S11, S22, S12 (dB)
-15 -20 -25 -30 -35 S11 -40 -45 -50 0 1 2 3 FREQUENCY (GHz) 4 5 6
06879-005
6
S12
5 +85C 4 +25C
3
06879-008
-40C 2 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 FREQUENCY (GHz)
6.0
Figure 5. Input Return Loss (S11), Output Return Loss (S22), and Reverse Isolation (S12) vs. Frequency
Figure 8. Noise Figure vs. Frequency and Temperature
Rev. A | Page 8 of 12
06879-007
06879-006
ADL5542
50 40
40 30
PERCENTAGE (%)
30
PERCENTAGE (%)
06879-009
20
20
10 10
06879-011
0 38.0 39.2 OIP3 (dBm) 40.4 41.6
0 19.5 19.6 19.7 GAIN (dB) 19.8 19.9
Figure 9. OIP3 Distribution at 900 MHz
Figure 11. Gain Distribution at 900 MHz
25
40 35
20 30
PERCENTAGE (%)
PERCENTAGE (%)
15
25 20 15 10
10
5
06879-010 06879-012
5 0 2.40
0 20.3 20.4 20.5 20.6 20.7 20.8 20.9 P1dB (dBm)
2.52
2.64
2.76
2.88
3.00
3.12
3.24
3.36
3.48
NOISE FIGURE (dB)
Figure 10. P1dB Distribution at 900 MHz
Figure 12. Noise Figure Distribution at 900 MHz
Rev. A | Page 9 of 12
ADL5542 BASIC CONNECTIONS
The basic connections for operating the ADL5542 are shown in Figure 13. Recommended components are listed in Table 5. The input and output should be ac-coupled with appropriately sized capacitors (device characterization was performed with 33 pF capacitors). A 5 V dc bias is supplied to the amplifier via VPOS (Pin 5) and through a biasing inductor connected to RFOUT (Pin 8). The bias voltage should be decoupled using a 1 F capacitor, a 1.2 nF capacitor, and two 68 pF capacitors.
VCC C6 1F C5 1.2nF C4 68pF L1 47nH C1 33pF RFIN 2.0
06879-015
4.0
3.5
NOISE FIGURE (dB)
3.0
2.5
ADL5542
1 RFIN RFOUT 8 2 GND 3 GND 4 CB GND 7 GND 6 VPOS 5
C2 33pF RFOUT GND
1.5 50
100
150
200
250
300
350
400
450
500
FREQUENCY (MHz)
Figure 15. Noise Figure vs. Frequency
06879-013
C3 1F
VCC C7 68pF
SOLDERING INFORMATION AND RECOMMENDED PCB LAND PATTERN
Figure 16 shows the recommended land pattern for the ADL5542. To minimize thermal impedance, the exposed paddle on the package underside should be soldered down to a ground plane along with Pin 2, Pin 3, Pin 6, and Pin 7. If multiple ground layers exist, they should be stitched together using vias (a minimum of five vias is recommended). For more information on land pattern design and layout, refer to Application Note AN-772, A Design and Manufacturing Guide for the Lead Frame Chip Scale Package (LFCSP).
2.03mm
Figure 13. Basic Connections
For operation between 50 MHz and 500 MHz, a larger biasing choke and ac coupling capacitors are necessary (see Table 5). Figure 14 shows a plot of the input return loss, the output return loss, and the gain with these components. At 100 MHz, the ADL5542 achieves an OIP3 of 38 dBm (POUT = 0 dBm per tone). The noise figure performance for operation from 50 MHz to 500 MHz is shown in Figure 15. When operating below 50 MHz, the ADL5542 exhibits gain peaking, and the input and output match degrade significantly.
21.0 10
PIN 1
PIN 8
20.5 S21 20.0
0
0.5mm
-10
1.85mm
1.78mm
RETURN LOSS (dB)
GAIN (dB)
19.5 S11 19.0 S22 18.5
-20
PIN 4 1.53mm 0.71mm
PIN 5
06879-016
-30
-40
Figure 16. Recommended Land Pattern
100
150
200
250
300
350
400
450
FREQUENCY (MHz)
Figure 14. Input Return Loss (S11), Output Return Loss (S22), and Gain (S21) vs. Frequency
Table 5. Recommended Components for Basic Connections
Frequency 50 MHz to 500 MHz 500 MHz to 6000 MHz C1 0.1 F 33 pF C2 0.1 F 33 pF C3 1 F 1 F L1 470 nH (Coilcraft 0603LS-471NXJL_ or equivalent) 47 nH (Coilcraft 0603CS-47NXJL_ or equivalent) C4 68 pF 68 pF C5 1.2 nF 1.2 nF C6 1 F 1 F C7 68 pF 68 pF
Rev. A | Page 10 of 12
06879-014
18.0 50
-50 500
ADL5542 EVALUATION BOARD
Figure 19 shows the schematic for the ADL5542 evaluation board. The board is powered by a single 5 V supply. The components used on the board are listed in Table 6. Power can be applied to the board through clip-on leads (VCC and GND) or through a 2-pin header (W1).
VCC C6 1F C5 1.2nF C4 68pF L1 47nH C1 33pF RFIN W1
ADL5542
1 RFIN RFOUT 8 2 GND 3 GND 4 CB GND 7 GND 6 VPOS 5 DUT1 C7 68pF
C2 33pF RFOUT GND
VCC
06879-017
Figure 19. Evaluation Board Schematic
Figure 17. Evaluation Board Layout (Bottom)
Figure 18. Evaluation Board Layout (Top)
Table 6. Evaluation Board Configuration Options
Component DUT1 C1, C2 C3 C4, C5, C6, C7, C8, C9 Function Gain block AC coupling capacitors Low frequency bypass capacitor Power supply decoupling capacitors Default Value ADL5542 33 pF, 0402 1 F, 0805 C4, C7 = 68 pF, 0603 C5 = 1.2 nF, 0603 C6 = 1 F, 0805 C8, C9 = open 47 nH, 0603 (Coilcraft 0603CS-47NXJL_ or equivalent)
L1 VCC and GND W1
DC bias inductor Clip-on terminals for power supply 2-pin header for connection of ground and supply via cable
06879-018
Rev. A | Page 11 of 12
06879-019
C3 1F
C8 OPEN
C9 OPEN
ADL5542 OUTLINE DIMENSIONS
3.25 3.00 SQ 2.75 0.60 MAX 0.60 MAX
5 8
0.50 BSC
PIN 1 INDICATOR
TOP VIEW
2.95 2.75 SQ 2.55
EXPOSED PAD
(BOT TOM VIEW)
1.60 1.45 1.30 PIN 1 INDICATOR
4
1
12 MAX 0.90 MAX 0.85 NOM SEATING PLANE
0.70 MAX 0.65 TYP
0.50 0.40 0.30 0.05 MAX 0.01 NOM
1.89 1.74 1.59
Figure 20. 8-Lead Lead Frame Chip Scale Package [LFCSP_VD] 3 mm x 3 mm Body, Very Thin, Dual Lead (CP-8-2) Dimensions shown in millimeters
ORDERING GUIDE
Model ADL5542ACPZ-R7 1 ADL5542-EVALZ1
1
Temperature Range -40C to +85C
Package Description 8-Lead LFCSP_VD, Tape and Reel Evaluation Board
Package Option CP-8-2
061507-B
0.30 0.23 0.18
0.20 REF
Branding Q15
Z = RoHS Compliant Part.
(c)2007 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D06879-0-10/07(A)
Rev. A | Page 12 of 12

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