ANALOG DEVICES ADL5243 Service Manual

100 MHz to 4000 MHz

Data Sheet

FEATURES

Operating frequency from 100 MHz to 4000 MHz Digitally controlled VGA with serial and parallel interfaces 6-bit, 0.5 dB digital step attenuator

31.5 dB gain control range with ±0.25 dB step accuracy Gain Block Amplifier 1

Gain: 19.2 dB at 2140 MHz OIP3: 40.2 dBm at 2140 MHz P1dB: 19.8 dBm at 2140 MHz Noise figure: 2.9 dB at 2140 MHz

¼ W Driver Amplifier 2

Gain: 14.2 dB at 2140 MHz OIP3: 41.1 dBm at 2140 MHz P1dB: 26.0 dBm at 2140 MHz

Noise figure: 3.7 dB at 2140 MHz Gain block, DSA, or ¼ W driver amplifier can be first Low quiescent current of 175 mA The companion

APPLICATIONS

Wireless infrastructure Automated test equipment RF/IF gain control

ADL5240 integrates a gain block with DSA

RF/IF Digitally Controlled VGA

ADL5243

GENERAL DESCRIPTION

The ADL5243 is a high performance, digitally controlled variable gain amplifier operating from 100 MHz to 4000 MHz.

The VGA integrates two high performance amplifiers and a digital step attenuator (DSA). Amplifier 1 (AMP1) is an internally matched gain block amplifier with 20 dB gain, and Amplifier 2 (AMP2) is a broadband ¼ W driver amplifier. The DSA is 6-bit with a 31.5 dB gain control range, 0.5 dB steps, and ±0.25 dB step accuracy. The attenuation of the DSA can be controlled using a serial or parallel interface.

The gain block and DSA are internally matched to 50 Ω at their inputs and outputs, and all three internal devices are separately biased. The separate bias allows all or part of the ADL5243 to be used, which allows for easy reuse throughout a design. The pinout of the ADL5243 also enables the gain block, DSA, or ¼ W driver amplifier to be first, giving the VGA maximum flexibility in a signal chain.

The ADL5243 consumes 175 mA and operates off a single supply ranging from 4.75 V to 5.25 V. The VGA is packaged in a thermally efficient, 5 mm × 5 mm, 32-lead LFCSP and is fully specified for operation from −40°C to +85°C. A fully populated evaluation board is available.

FUNCTIONAL BLOCK DIAGRAM

SEL31D0/CLK30D1/DATA29D2/LE28D327D426D525D6

32

1

VDD

2

NC

3

NC

4

DSAIN

NC

AMP1OUT/VCC

NC

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.

0.5dB 1dB 2dB 4dB 8dB 16dB

5

6

7

8

9NC10

SERIAL/PARAL LEL INT ERFACE

AMP1

11NC12NC13NC14NC15

AMP1IN

ADL5243

Figure 1.

24

VDD

23

NC

22

NC

21

DSAOUT

20

NC

19

AMP2IN

AMP2

AMP2OUT/VCC2

18

NC

17

NC

16

VBIAS

09431-001

ADL5243 Data Sheet

REVISION HISTORY

8/11—Rev. 0 to Rev. A

Changes to Features Section............................................................ 1

7/11—Revision 0: Initial Version

Basic Layout Connections......................................................... 20

SPI Timing................................................................................... 21

ADL5243 Amplifier 2 Matching .............................................. 23

ADL5243 Loop Performance.................................................... 26

Thermal Considerations............................................................ 26

Soldering Information and Recommended PCB

Land Pattern................................................................................ 26

Evaluation Board............................................................................ 27

Outline Dimensions....................................................................... 30

Ordering Guide .......................................................................... 30



Rev. A | Page 2 of 32

Data Sheet ADL5243

SPECIFICATIONS

VDD = 5V, VCC = 5V, VCC2 = 5V, TA = 25oC.

Table 1.

Parameter Conditions Min Typ Max Unit

OVERALL FUNCTION

Frequency Range 100 4000 MHz

AMPLIFIER 1 FREQUENCY = 150 MHz Using the AMP1IN and AMP1OUT pins

Gain 18.2 dB

vs. Frequency ±50 MHz ±0.97 dB vs. Temperature −40°C ≤ TA ≤ +85°C ±0.07 dB

vs. Supply 4.75 V to 5.25 V ±0.03 dB Input Return Loss S11 −10.4 dB Output Return Loss S22 −8.2 dB Output 1 dB Compression Point 18.4 dBm Output Third-Order Intercept ∆f = 1 MHz, P Noise Figure 2.8 dB

AMPLIFIER 1 FREQUENCY = 450 MHz Using the AMP1IN and AMP1OUT pins

Gain 20.6 dB

vs. Frequency ±50 MHz ±0.10 dB

vs. Temperature −40°C ≤ TA ≤ +85°C ±0.36 dB

vs. Supply 4.75 V to 5.25 V ±0.01 dB Input Return Loss S11 −17.8 dB Output Return Loss S22 −16.5 dB Output 1 dB Compression Point 19.5 dBm Output Third-Order Intercept ∆f = 1 MHz, P Noise Figure 2.8 dB

AMPLIFIER 1 FREQUENCY = 748 MHz Using the AMP1IN and AMP1OUT pins

Gain 20.8 dB

vs. Frequency ±50 MHz ±0.02 dB

vs. Temperature −40°C ≤ TA ≤ +85°C ±0.32 dB

vs. Supply 4.75 V to 5.25 V ±0.01 dB Input Return Loss S11 −22.0 dB Output Return Loss S22 −21.6 dB Output 1 dB Compression Point 19.6 dBm Output Third-Order Intercept ∆f = 1 MHz, P Noise Figure 2.7 dB

AMPLIFIER 1 FREQUENCY = 943 MHz Using the AMP1IN and AMP1OUT pins

Gain 19.0 20.3 22.0 dB

vs. Frequency ±18 MHz ±0.01 dB

vs. Temperature −40°C ≤ TA ≤ +85°C ±0.28 dB

vs. Supply 4.75 V to 5.25 V ±0.02 dB Input Return Loss S11 −24.0 dB Output Return Loss S22 −21.5 dB Output 1 dB Compression Point 18.5 19.9 dBm Output Third-Order Intercept ∆f = 1 MHz, P Noise Figure 2.7 dB

= 3 dBm/tone 29.5 dBm

OUT

= 3 dBm/tone 38.4 dBm

OUT

= 3 dBm/tone 39.6 dBm

OUT

= 3 dBm/tone 40.4 dBm

OUT

Rev. A | Page 3 of 32

ADL5243 Data Sheet

Parameter Conditions Min Typ Max Unit

AMPLIFIER 1 FREQUENCY = 1960 MHz Using the AMP1IN and AMP1OUT pins

Gain 19.5 dB

vs. Frequency ±30 MHz ±0.02 dB vs. Temperature −40°C ≤ TA ≤ +85°C ±0.26 dB

vs. Supply 4.75 V to 5.25 V ±0.04 dB Input Return Loss S11 −13.5 dB Output Return Loss S22 −12.4 dB Output 1 dB Compression Point 19.6 dBm Output Third-Order Intercept ∆f = 1 MHz, P Noise Figure 2.9 dB

AMPLIFIER 1 FREQUENCY = 2140 MHz Using the AMP1IN and AMP1OUT pins

Gain 17.5 19.2 21.5 dB

vs. Frequency ±30 MHz ±0.02 dB

vs. Temperature −40°C ≤ TA ≤ +85°C ±0.26 dB

vs. Supply 4.75 V to 5.25 V ±0.05 dB Input Return Loss S11 −13.3 dB Output Return Loss S22 −12.2 dB Output 1 dB Compression Point 17.5 19.8 dBm Output Third-Order Intercept ∆f = 1 MHz, P Noise Figure 2.9 dB

AMPLIFIER 1 FREQUENCY = 2630 MHz Using the AMP1IN and AMP1OUT pins

Gain 17.5 19.0 21.5 dB

vs. Frequency ±60 MHz ±0.03 dB

vs. Temperature −40°C ≤ TA ≤ +85°C ±0.22 dB

vs. Supply 4.75 V to 5.25 V ±0.05 dB Input Return Loss S11 −17.3 dB Output Return Loss S22 −12.3 dB Output 1 dB Compression Point 17.5 19.5 dBm Output Third-Order Intercept ∆f = 1 MHz, P Noise Figure 2.9 dB

AMPLIFIER 1 FREQUENCY = 3600 MHz Using the AMP1IN and AMP1OUT pins

Gain 18.0 dB

vs. Frequency ±100 MHz ±0.10 dB

vs. Temperature −40°C ≤ TA ≤ +85°C ±0.05 dB

vs. Supply 4.75 V to 5.25 V ±0.12 dB Input Return Loss S11 −30.7 dB Output Return Loss S22 −9.0 dB Output 1 dB Compression Point 18.0 dBm Output Third-Order Intercept ∆f = 1 MHz, P Noise Figure 3.3 dB

AMPLIFIER 2 FREQUENCY = 748 MHz Using the AMP2IN and AMP2OUT pins

Gain 17.5 dB

vs. Frequency ±50 MHz ±0.14 dB Input Return Loss S11 −12.7 dB Output Return Loss S22 −8.6 dB Output 1 dB Compression Point 24.7 dBm Output Third-Order Intercept ∆f = 1 MHz, P Noise Figure 5.6 dB

= 3 dBm/tone 40.4 dBm

OUT

= 3 dBm/tone 40.2 dBm

OUT

= 3 dBm/tone 39.5 dBm

OUT

= 3 dBm/tone 34.6 dBm

OUT

= 5 dBm/tone 41.5 dBm

OUT

Rev. A | Page 4 of 32

Data Sheet ADL5243

Parameter Conditions Min Typ Max Unit

AMPLIFIER 2 FREQUENCY = 943 MHz Using the AMP2IN and AMP2OUT pins

Gain 16.5 dB

vs. Frequency ±18 MHz ±0.05 dB vs. Temperature −40°C ≤ TA ≤ +85°C ±0.39 dB

vs. Supply 4.75 V to 5.25 V ±0.10 dB Input Return Loss S11 −11.2 dB Output Return Loss S22 −8.1 dB Output 1 dB Compression Point 25.0 dBm Output Third-Order Intercept ∆f = 1 MHz, P Noise Figure 5.3 dB

AMPLIFIER 2 FREQUENCY = 2140 MHz Using the AMP2IN and AMP2OUT pins

Gain 13.0 14.2 15.5 dB

vs. Frequency ±30 MHz ±0.03 dB

vs. Temperature −40°C ≤ TA ≤ +85°C ±0.50 dB

vs. Supply 4.75 V to 5.25 V ±0.09 dB Input Return Loss S11 −10.7 dB Output Return Loss S22 −8.1 dB Output 1 dB Compression Point 26.0 dBm Output Third-Order Intercept ∆f = 1 MHz, P Noise Figure 3.7 dB

AMPLIFIER 2 FREQUENCY = 2630 MHz Using the AMP2IN and AMP2OUT pins

Gain 13.0 dB

vs. Frequency ±60 MHz ±0.13 dB

vs. Temperature −40°C ≤ TA ≤ +85°C ±0.56 dB

vs. Supply 4.75 V to 5.25 V ±0.09 dB Input Return Loss S11 −9.4 dB Output Return Loss S22 −8.3 dB Output 1 dB Compression Point 24.5 dBm Output Third-Order Intercept ∆f = 1 MHz, P Noise Figure 4.1 dB

DSA FREQUENCY = 150 MHz

Using the DSAIN and DSAOUT pins, minimum attenuation

Insertion Loss −1.5 dB

vs. Frequency ±50 MHz ±0.12 dB

vs. Temperature −40°C ≤ TA ≤ +85°C ±0.10 dB

Attenuation Range Between maximum and minimum attenuation states 28.8 dB Attenuation Step Error All attenuation states ±0.18 dB Attenuation Absolute Error All attenuation states ±1.35 dB Input Return Loss −13.5 dB

Output Return Loss −13.3 dB Input Third-Order Intercept ∆f = 1 MHz, P

= 5 dBm/tone 43.3 dBm

OUT

= 5 dBm/tone 41.1 dBm

OUT

= 5 dBm/tone 40.4 dBm

OUT

= 5 dBm/tone 45.2 dBm

OUT

Rev. A | Page 5 of 32

ADL5243 Data Sheet

Parameter Conditions Min Typ Max Unit

DSA FREQUENCY = 450 MHz

Using the DSAIN and DSAOUT pins, minimum attenuation

Insertion Loss −1.4 dB

vs. Frequency ±50 MHz ±0.02 dB

vs. Temperature −40°C ≤ TA ≤ +85°C ±0.12 dB Attenuation Range Between maximum and minimum attenuation states 30.7 dB Attenuation Step Error All attenuation states ±0.14 dB Attenuation Absolute Error All attenuation states ±0.39 dB Input Return Loss −17.7 dB

Output Return Loss −17.4 dB Input Third-Order Intercept ∆f = 1 MHz, P

DSA FREQUENCY = 748 MHz

Using the DSAIN and DSAOUT pins, minimum

= 5 dBm/tone 41.2 dBm

OUT

attenuation

Insertion Loss −1.5 dB

vs. Frequency ±50 MHz ±0.02 dB

vs. Temperature −40°C ≤ TA ≤ +85°C ±0.12 dB Attenuation Range Between maximum and minimum attenuation states 30.9 dB Attenuation Step Error All attenuation states ±0.15 dB Attenuation Absolute Error All attenuation states ±0.30 dB Input Return Loss −17.1 dB

Output Return Loss −17.1 dB Input Third-Order Intercept ∆f = 1 MHz, P

DSA FREQUENCY = 943 MHz

Using the DSAIN and DSAOUT pins, minimum

= 5 dBm/tone 40.4 dBm

OUT

attenuation

Insertion Loss −1.6 dB

vs. Frequency ±18 MHz ±0.01 dB

vs. Temperature −40°C ≤ TA ≤ +85°C ±0.13 dB Attenuation Range Between maximum and minimum attenuation states 30.9 dB Attenuation Step Error All attenuation states ±0.15 dB Attenuation Absolute Error All attenuation states ±0.28 dB Input Return Loss −16.0 dB

Output Return Loss −15.9 dB Input 1 dB Compression Point 30.5 dBm Input Third-Order Intercept ∆f = 1 MHz, P

DSA FREQUENCY = 1960 MHz

Using the DSAIN and DSAOUT pins, minimum

= 5 dBm/tone 48.3 dBm

OUT

attenuation

Insertion Loss −2.5 dB

vs. Frequency ±30 MHz ±0.04 dB

vs. Temperature −40°C ≤ TA ≤ +85°C ±0.18 dB Attenuation Range Between maximum and minimum attenuation states 30.8 dB Attenuation Step Error All attenuation states ±0.15 dB Attenuation Absolute Error All attenuation states ±0.35 dB Input Return Loss −10.3 dB

Output Return Loss −9.6 dB Input 1 dB Compression Point 31.5 dBm Input Third-Order Intercept ∆f = 1 MHz, P

= 5 dBm/tone 44.7 dBm

OUT

Rev. A | Page 6 of 32

Data Sheet ADL5243

Parameter Conditions Min Typ Max Unit

DSA FREQUENCY = 2140 MHz

Using the DSAIN and DSAOUT pins, minimum attenuation

Insertion Loss −2.6 dB

vs. Frequency ±30 MHz ±0.02 dB

vs. Temperature −40°C ≤ TA ≤ +85°C ±0.19 dB Attenuation Range Between maximum and minimum attenuation states 30.9 dB Attenuation Step Error All attenuation states ±0.13 dB Attenuation Absolute Error All attenuation states ±0.32 dB Input Return Loss −9.8 dB

Output Return Loss −9.3 dB Input 1 dB Compression Point 31.5 dBm Input Third-Order Intercept ∆f = 1 MHz, P

DSA FREQUENCY = 2630 MHz

Using the DSAIN and DSAOUT pins, minimum

= 5 dBm/tone 44.6 dBm

OUT

attenuation

Insertion Loss −2.8 dB

vs. Frequency ±60 MHz ±0.02 dB

vs. Temperature −40°C ≤ TA ≤ +85°C ±0.21 dB Attenuation Range Between maximum and minimum attenuation states 31.2 dB Attenuation Step Error All attenuation states ±0.18 dB Attenuation Absolute Error All attenuation states ±0.24 dB Input Return Loss −10.0 dB

Output Return Loss −9.6 dB Input 1 dB Compression Point 31.5 dBm Input Third-Order Intercept ∆f = 1 MHz, P

DSA FREQUENCY = 3600 MHz

Using the DSAIN and DSAOUT pins, minimum

= 5 dBm/tone 43.8 dBm

OUT

attenuation

Insertion Loss −3.0 dB

vs. Frequency ±100 MHz ±0.02 dB

vs. Temperature −40°C ≤ TA ≤ +85°C ±0.23 dB Attenuation Range Between maximum and minimum attenuation states 31.7 dB Attenuation Step Error All attenuation states ±0.38 dB Attenuation Absolute Error All attenuation states ±0.18 dB Input Return Loss −12.3 dB

Output Return Loss −11.7 dB Input 1 dB Compression Point 31.0 dBm Input Third-Order Intercept ∆f = 1 MHz, P

= 5 dBm/tone 42.2 dBm

OUT

DSA Gain Settling Using the DSAIN and DSAOUT pins

Minimum Attenuation to Maximum

36 ns

Attenuation

Maximum Attenuation to Minimum

36 ns

Attenuation

LOOP FREQUENCY = 943 MHz AMP1–DSA–AMP2, DSA at minimum attenuation

Gain 34.0 dB

vs. Frequency ±18 MHz ±0.10 dB

Gain Range Between maximum and minimum attenuation states 29.3 dB Input Return Loss S11 −14.2 dB Output Return Loss S22 −10.1 dB Output 1 dB Compression Point 25.1 dBm Output Third-Order Intercept ∆f = 1 MHz, P

= 5 dBm/tone 42.8 dBm

OUT

Noise Figure 2.9 dB

Rev. A | Page 7 of 32

ADL5243 Data Sheet

Parameter Conditions Min Typ Max Unit

LOOP FREQUENCY = 2140 MHz AMP1 – DSA – AMP2, DSA at minimum attenuation

Gain 31.3 dB

vs. Frequency ±30 MHz ±0.03 dB Gain Range Between maximum and minimum attenuation states 32.5 dB Input Return Loss S11 −9.3 dB Output Return Loss S22 −5.4 dB Output 1 dB Compression Point 25.3 dBm Output Third-Order Intercept ∆f = 1 MHz, P Noise Figure 3.1 dB

LOOP FREQUENCY = 2630 MHz AMP1 – DSA – AMP2, DSA at minimum attenuation

Gain 29.5 dB

vs. Frequency ±60 MHz ±0.56 dB Gain Range Between maximum and minimum attenuation states 30.0 dB Input Return Loss S11 −12.6 dB Output Return Loss S22 −5.8 dB Output 1 dB Compression Point 24.6 dBm Output Third-Order Intercept ∆f = 1 MHz, P Noise Figure 3.1 dB

POWER SUPPLIES

Voltage 4.75 5.0 5.25 V Supply Current AMP1 89 120 mA AMP2 86 120 mA DSA 0.5 mA

= 5 dBm/tone 40.0 dBm

OUT

= 5 dBm/tone 39.3 dBm

OUT

Rev. A | Page 8 of 32

Data Sheet ADL5243

ABSOLUTE MAXIMUM RATINGS

Table 2.

Parameter Rating

Supply Voltage (VDD, VCC, VCC2) 6.5 V

Input Power

AMP1IN 16 dBm AMP2IN (50 Ω Impedance)

DSAIN 30 dBm Internal Power Dissipation 1.0 W θJA (Exposed Paddle Soldered Down) 34.8°C/W θJC (Exposed Paddle) 6.2°C/W Maximum Junction Temperature 150°C Lead Temperature (Soldering, 60 sec) 240°C Operating Temperature Range −40°C to +85°C Storage Temperature Range −65°C to +150°C

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.

20 dBm

ESD CAUTION

Rev. A | Page 9 of 32

ADL5243 Data Sheet

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

D3

SEL

32

D4

D1/DATA

D2/LE

D5

D0/CLK

31

30

D6

29

28

27

26

25

1VDD

PIN 1

2NC

INDICATOR

3NC

ADL5243

4DSAIN 5NC

TOP VIEW

(Not to Scale)

6AMP1OUT/VCC 7NC 8NC

9

11

10

12

13

NC

AMP1IN

NOTES

1. NC = NO CONNECT . DO NOT CONNECT TO T HIS PIN.

2. THE EXPOSED PAD MUST BE CONNECTED TO GROUND.

24 VDD 23 NC 22 NC 21 DSAOUT 20 NC 19 AMP2IN 18 NC 17 NC

14

15

16

NC

VBIAS

AMP2OUT/VCC2

09431-002

Figure 2. Pin Configuration

Table 3. Pin Function Descriptions

Pin No. Mnemonic Description

1, 24 VDD Supply Voltage for DSA. Connect this pin to a 5 V supply. 2, 3, 5, 7, 8, 9, 11, 12, 13, 14,

NC No Connect. Do not connect to this pin.

17, 18, 20, 22, 23 4 DSAIN RF Input to DSA. 6 AMP1OUT/VCC

RF Output from Amplifier 1/Supply Voltage for Amplifier 1. Bias to Gain Block

Amplifier 1 is provided through a choke to this pin when connected to VCC. 10 AMP1IN RF Input to Gain Block Amplifier 1. 15 AMP2OUT/VCC2

RF Output from Amplifier 2/Supply Voltage for Amplifier 2. Bias to Driver Amplifier 2 is

provided through a choke to this pin when connected to VCC2. 16 VBIAS Bias for Driver Amplifier 2. 19 AMP2IN RF Input to Amplifier 2. 21 DSAOUT RF Output from DSA. 25 D6 Data Bit in Parallel Mode (LSB). Connect to supply in serial mode. 26 D5 Data Bit in Parallel Mode. Connect to ground in serial mode. 27 D4 Data Bit in Parallel Mode. Connect to ground in serial mode. 28 D3 Data Bit in Parallel Mode. Connect to ground in serial mode. 29 D2/LE Data Bit in Parallel Mode/Latch Enable in Serial Mode. 30 D1/DATA Data Bit in Parallel Mode (MSB)/Data in Serial Mode. 31 D0/CLK

Connect this pin to ground in parallel mode. This pin functions as a clock in serial

mode. 32 SEL

Select Pin. Connect this pin to the supply for parallel mode operation; connect this pin

to ground for serial mode operation. EPAD Exposed Paddle. The exposed paddle must be connected to ground.

Rev. A | Page 10 of 32

ANALOG DEVICES ADL5243 Service Manual

FEATURES

APPLICATIONS

GENERAL DESCRIPTION

FUNCTIONAL BLOCK DIAGRAM

TABLE OF CONTENTS

REVISION HISTORY

SPECIFICATIONS

ABSOLUTE MAXIMUM RATINGS

ESD CAUTION

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS