ANALOG DEVICES ADL5592 Service Manual

250 MHz to 2400 MHz

FEATURES

Output frequency range: 250 MHz to 2400 MHz Noise figure: 5.7 dB at 1960 MHz OIP3 at 1960 MHz: 29 dBm at P 2 digital attenuators, each with 31 dB range 1 dB attenuation step size Single SPI port Single supply: 4.5 V to 5.5 V 40-lead, 6 mm × 6 mm LFCSP package

APPLICATIONS

GSM/EDGE and cellular communications systems

GENERAL DESCRIPTION

The ADL5592 is a digitally programmable variable gain amplifier (VGA) designed for use from 250 MHz to 2400 MHz. Two digitally programmable attenuators are cascaded with a high linearity fixed-gain amplifier. The device also includes a mixer, which can be used to mix the transmitted signal into an adjacent receive band for loopback testing.

The ADL5592 can be used in conjunction with a direct-to-RF modulator, such as ADL537x and ADL539x, in cellular communications systems such as GSM/EDGE.

The ADL5592 is available in a 6 mm × 6 mm, 40-lead exposedpaddle LFCSP package. The device operates from the −40°C to +85°C temperature range.

= 0 dBm per tone

IN

RF Variable Gain Amplifier

ADL5592

FUNCTIONAL BLOCK DIAGRAM

RFIN

LOIP

LOOP EN

LOOP OUT SPI PORT*

*COMPRISES T HE DATA, CLK, AND LE PINS.

ATT ENU ATOR

CONTROL

CIRCUITRY

Figure 1.

ADL5592

RFOUT

06662-001

Rev. 0

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.

ADL5592

REVISION HISTORY

6/08—Revision 0: Initial Version

Rev. 0 | Page 2 of 20

ADL5592

SPECIFICATIONS

Measured at VCC = 5.0 V, TA = 25°C, unless otherwise noted.

Table 1.

Parameter Conditions Min Typ Max Unit

OPERATING FREQUENCY RANGE 250 2400 MHz DIGITAL ATTENUATORS—fRF =

460 MHz to 496 MHz Attenuation Range 28 30.5 dB Attenuator Step Size 1 dB Relative Step Accuracy −0.02 ±1.0 dB Absolute Step Accuracy 0.4 ±4.0 dB Step Size Variation vs. Frequency Variation within transmit band −0.02 dB Dynamic Range Variation vs.

Temperature

VGA RF Output Power RFIN = 4 dBm, minimum attenuation 16.3 dBm

vs. Frequency Variation within transmit band 0.02 dB

Gain Minimum attenuation, 270 nH choke inductor 8 12.3 dB

vs. Temperature Variation within TA = 0°C to 85°C 1 dB

vs. Frequency Variation within transmit band 0.02 dB OIP3 Two tones with Δ = 1 MHz, 0 dBm per input tone 27.7 dBm Noise Figure Minimum attenuation 4.3 dB Return Loss RFIN at minimum attenuation −10 dB RFOUT at minimum attenuation −15 dB Modulation Spectrum

400 kHz carrier offset −72 dBc 600 kHz carrier offset −85 dBc

1.2 MHz carrier offset −88 dBc Error Vector Magnitude (EVM) P

RMS 0.7 % Peak 2.1 % DIGITAL ATTENUATORS—fRF =

869 MHz to 960 MHz Attenuation Range 28 30.1 dB Attenuator Step Size 1 dB Relative Step Accuracy −0.03 ±1.0 dB Absolute Step Accuracy 0.5 ±4.0 dB Step Size Variation vs. Frequency Variation within transmit band −0.03 dB Dynamic Range Variation vs.

Temperature

RFOUT Power RFIN = 4 dBm, minimum attenuation 14.8 dBm

vs. Frequency Variation within transmit band 0.2 dB Gain Minimum attenuation, 270 nH choke inductor 8 10.8 dB

vs. Temperature Variation within TA = 0°C to 85°C 1.3 dB

vs. Frequency Variation within transmit band 0.2 dB OIP3 Two tones with Δ = 1 MHz, 0 dBm per input tone 28.5 dBm Noise Figure Minimum attenuation 4.8 dB Return Loss RFIN at minimum attenuation −9.8 dB RFOUT at minimum attenuation −9.8 dB Modulation Spectrum

400 kHz carrier offset −72 dBc 600 kHz carrier offset −84 dBc

1.2 MHz carrier offset −88 dBc

= 0°C to 85°C 0.6 dB

T

A

Relative to carrier in 30 kHz, P

= 12 dBm, 8 PSK,

OUT

270 nH choke inductor

= 12 dBm, 8 PSK

OUT

= 0°C to 85°C 0.6 dB

T

A

Relative to carrier in 30 kHz, P

= 12 dBm, 8 PSK

OUT

270 nH choke inductor

Rev. 0 | Page 3 of 20

ADL5592

Parameter Conditions Min Typ Max Unit

Error Vector Magnitude (EVM) P RMS 0.9 % Peak 2.7 % DIGITAL ATTENUATORS—fRF =

1805 MHz to 1990 MHz Attenuation Range 28 30.5 dB Attenuator Step Size 1 dB Relative Step Accuracy −0.02 ±1.0 dB Absolute Step Accuracy 0.24 ±4.0 dB Step Size Variation vs. Frequency Variation within transmit band −0.02 dB Dynamic Range Variation vs.

Temperature

RFOUT Power RFIN = 4 dBm, minimum attenuation 12.9 dBm

vs. Frequency Variation within transmit band 0.2 dB

Gain Minimum attenuation, 33 nH choke inductor 8 8.9 dB

vs. Temperature Variation within TA = 0°C to 85°C 1.5 dB

vs. Frequency Variation within transmit band 0.2 dB OIP3 Two tones with Δ = 1 MHz, 0 dBm per input tone 29 dBm Noise Figure Minimum attenuation 5.7 dB Return Loss RFIN at minimum attenuation −16.4 dB RFOUT at minimum attenuation −11.1 dB Modulation Spectrum

400 kHz carrier offset −71 dBc 600 kHz carrier offset −86 dBc

1.2 MHz carrier offset −88 dBc Error Vector Magnitude (EVM) P

RMS 0.7 % Peak 1.9 % LOGIC INPUTS

Clock Speed 13 MHz Input Logic Low DATA, CLK, LE 0.8 V Input Logic High 2.5 V

RF LOOP MIXER

Input Frequency 460 1990 MHz Output Frequency 450 1910 MHz Input Return Loss RFIN with loop enable active low at 1960 MHz −13 dB LOIP at 80 MHz −16 dB Output Return Loss LOOP OUT at 1880 MHz −8 dB LOIP Frequency Range 10 95 MHz LOIP Power −6 0 dBm LOOP OUT Power RFIN = 5 dBm 450 MHz to 486 MHz −13.0 dBm 824 MHz to 915 MHz −12.1 dBm 1710 MHz to 1910 MHz −13.1 dBm Output Power Flatness

vs. Frequency Within a received band 0.6 dB

vs. Temperature Variation within TA = 0°C to 85°C 1.1 dB OIP3 Two tones with Δ = 1 MHz, 0 dBm per input tone 450 MHz to 486 MHz 13.8 dBm 824 MHz to 915 MHz 13 dBm 1710 MHz to 1910 MHz 10.1 dBm Output Noise Density Carrier offset > 400 kHz −132 dBc/Hz Loop Enable Control V

= 12 dBm, 8 PSK

OUT

= 0°C to 85°C 0.7 dB

T

A

Relative to carrier in 30 kHz, P

= 12 dBm, 8 PSK

OUT

33 nH choke inductor

= 12 dBm, 8 PSK

OUT

Rev. 0 | Page 4 of 20

ADL5592

Parameter Conditions Min Typ Max Unit

Input Logic Low Loopback active 0 0.8 V Input Logic High Loopback inactive 2.4 5 V Switching Time Enable/disable 500 ns

ISOLATION

LOOP OUT to RFOUT

Loopback mode, at loop output frequency, maximum attenuation set on ATTN 1 and ATTN 2. RFIN = 4 dBm, RF loop output = −11 dBm

RFIN to RFOUT

Loopback mode, at RF input frequency, maximum attenuation set on ATTN 1 and ATTN 2. RFIN = 4 dBm, RF loop output = −11 dBm

RFOUT to LOOP OUT

RFIN to LOOP OUT

At carrier frequency, transmit mode, minimum attenuation set on ATTN 1 and ATTN 2, P

= 15 dBm

OUT

Transmit mode, maximum attenuation set on ATTN 1 and ATTN 2, P

INATT1

= 4 dBm

POWER SUPPLIES VCC pins

Voltage 4.5 5.0 5.5 V Supply Current Loopback active at TA = 25°C 230 mA T

= −40°C to +85°C 255 mA

A

Loopback inactive at TA = 25°C 189 mA T

= −40°C to +85°C 208 mA

A

−68 dBm

−50 dBm

−50 dB

Rev. 0 | Page 5 of 20

ADL5592

ABSOLUTE MAXIMUM RATINGS

Table 2.

Parameter Rating

Supply Voltage VCC 5.5 V RFIN 15 dBm LOIP 10 dBm LOOP EN, DATA, CLK, LE 5.5 V Internal Power Dissipation 1650 mW θJA (Exposed Paddle Soldered Down) 47°C/W Maximum Junction Temperature 150°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.

ESD CAUTION

Rev. 0 | Page 6 of 20

ANALOG DEVICES ADL5592 Service Manual

FEATURES

APPLICATIONS

GENERAL DESCRIPTION

FUNCTIONAL BLOCK DIAGRAM

TABLE OF CONTENTS

REVISION HISTORY

SPECIFICATIONS

ABSOLUTE MAXIMUM RATINGS

ESD CAUTION