ANALOG DEVICES ADL5501 Service Manual

50 MHz to 6 GHz

FEATURES

True rms response Excellent temperature stability Up to 30 dB input dynamic range 50 Ω input impedance

1.25 V rms, 15 dBm, maximum input Single-supply operation: 2.7 V to 5.5 V Low power: 3.3 mW at 3 V supply RoHS-compliant

APPLICATIONS

Measurement of CDMA-, CDMA2000-, W-CDMA-, and QPSK-/

QAM-based OFDM, and other complex modulation waveforms

RF transmitter or receiver power measurement

GENERAL DESCRIPTION

The ADL5501 is a mean-responding TruPwr™ power detector for use in high frequency receiver and transmitter signal chains from 50 MHz to 6 GHz. It is easy to apply, requiring only a single supply between 2.7 V and 5.5 V and a power supply decoupling capacitor. The input is internally ac-coupled and has a nominal input impedance of 50 Ω. The output is a linear-responding dc voltage with a conversion gain of 6.3 V/V rms at 900 MHz.

The ADL5501 is intended for true power measurement of simple and complex waveforms. The device is particularly useful for measuring high crest factor (high peak-to-rms ratio) signals, such as CDMA-, CDMA2000-, W-CDMA-, and QPSK-/QAMbased OFDM waveforms. The on-chip modulation filter provides adequate averaging for most waveforms.

TruPwr Detector

ADL5501

5

1

OUTPUT (V)

0.1

0.03 –25 –20 –15 –10 –5 0 5 10 15

Figure 1. Output vs. Input Level, Supply = 3 V, Frequency = 1.9 GHz

The on-chip, 100 Ω series resistance at the output, combined with an external shunt capacitor, creates a low-pass filter response that reduces the residual ripple in the dc output voltage. For more complex waveforms, an external capacitor at the FLTR pin can be used for supplementary signal demodulation.

The ADL5501 offers excellent temperature stability across a 30 dB range and near 0 dB measurement error across temperature over the top portion of the dynamic range. In addition to its temperature stability, the ADL5501 offers low process variations that further reduce calibration complexity.

The ADL5501 operates from −40°C to +85°C and is available in a small 6-lead SC-70 package. It is fabricated on a proprietary high f

silicon bipolar process.

T

INPUT (dBm)

06056-001

FUNCTIONAL BLOCK DIAGRAM

ADL5501

RFIN

TRANSCONDICTANCE CELLS

Rev. B

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.

i

2

x

i

2

x

ERROR

AMP

BAND-GAP

REFERENCE

Figure 2.

100Ω

VPOS

FLTR

VRMS

ENBL

COMM

6056-002

INTERNAL FILTER CAPACITOR

BUFFER

ADL5501

REVISION HISTORY

3/09—Rev. A to Rev. B

Change to Features ........................................................................... 1

Changes to Table 1 ............................................................................ 3

Changes to Figure 4, Figure 5, Figure 7, and Figure 9 ............... 10

Deleted Figure 17 and Figure 21; Renumbered Sequentially ... 12

Changes to Figure 18 and Figure 21 ............................................. 13

Changes to Figure 36 and Figure 39 ............................................. 16

Changes to Figure 42 ...................................................................... 18

Changes to Operation Below 100 MHz Section ......................... 23

Deleted Figure 56 ............................................................................ 22

Deleted Figure 57 ............................................................................ 23

10/07—Rev. 0 to Rev. A

Changes to General Description ..................................................... 1

Changes to Table 1 ............................................................................. 3

Changes to Figure 30, Figure 32, and Figure 33 ......................... 14

Changes to Figure 35, Figure 37, and Figure 38 ......................... 15

Changes to Circuit Description Section ...................................... 16

Changes to Layout and Operation Below 100 MHz and

Above 4.0 GHz Section .................................................................. 22

Inserted Figure 56 ........................................................................... 22

Inserted Figure 57 ........................................................................... 23

Changes to Figure 58 ...................................................................... 23

Deleted Figure 57 and Figure 58 .................................................. 24

Changes to Figure 59 and Figure 60............................................. 24

9/06—Revision 0: Initial Version

Rev. B | Page 2 of 28

ADL5501

SPECIFICATIONS

TA = 25°C, VS = 3.0 V, C

Table 1.

Parameter Condition Min Typ Max Unit

FREQUENCY RANGE Input RFIN 50 6000 MHz RMS CONVERSION (f = 50 MHz) Input RFIN to Output VRMS

Input Impedance 87||6.9 Ω||pF Input Return Loss 11.0 dB Dynamic Range

±1 dB Error

1

CW input, −40°C < T

2

V

V ±2 dB Error

2

V

Maximum Input Level ±1 dB error Minimum Input Level ±1 dB error Conversion Gain V Output Intercept

3

Output Voltage—High Power In PIN = 5 dBm, 400 mV rms 1.81 V Output Voltage—Low Power In PIN = −21 dBm, 20 mV rms 0.11 V Temperature Sensitivity PIN = −5 dBm

RMS CONVERSION (f = 100 MHz) Input RFIN to Output VRMS

Input Impedance 78||4.2 Ω||pF Input Return Loss 12.6 dB Dynamic Range

±0.25 dB Error ±0.25 dB Error

1

CW input, −40°C < T

4

2

V ±1 dB Error

2

V

V ±2 dB Error

2

V

Maximum Input Level ±1 dB error Minimum Input Level ±1 dB error Conversion Gain V V Output Intercept

3

V Output Voltage—High Power In PIN = 5 dBm, 400 mV rms 2.47 V Output Voltage—Low Power In PIN = −21 dBm, 20 mV rms 0.13 V Temperature Sensitivity PIN = −5 dBm

= open, C

FLTR

0.03 V

Delta from 25°C, V

V

0.03 V

= 100 nF, unless otherwise specified.

OUT

< +85°C

A

= 3 V 25 dB

S

= 5 V 26 dB

S

= 3 V 32 dB

S

= 5 V 35 dB

S

OUT

25°C ≤ T

−40°C ≤ T

= 3 V 19 dB

S

= 5 V 20 dB

S

= 3 V 23 dB

S

= 5 V 27 dB

S

= 3 V 26 dB

S

= 5 V 30 dB

S

OUT

= 5 V 5.6 7.8 V/V rms

S

= 5 V −0.02 +0.1 V

S

25°C ≤ T

−40°C ≤ T

2

8 dBm

2

−18 dBm

= (gain × VIN) + intercept 4.5 V/V rms

≤ 85°C

A

≤ +25°C

A

< +85°C

A

= 5 V 28 dB

S

2

6 dBm

2

−18 dBm

= (gain × VIN) + intercept 6.1 V/V rms

≤ 85°C

A

≤ +25°C

A

0.0039 dB/°C

−0.0037 dB/°C

0.0028 dB/°C

−0.0018 dB/°C

Rev. B | Page 3 of 28

ADL5501

Parameter Condition Min Typ Max Unit

RMS CONVERSION (f = 450 MHz) Input RFIN to Output VRMS

Input Impedance 63||1.4 Ω||pF Input Return Loss 16.0 dB Dynamic Range

±0.25 dB Error ±0.25 dB Error V ±1 dB Error V ±2 dB Error

V

Maximum Input Level ±1 dB error Minimum Input Level ±1 dB error Conversion Gain V Output Intercept Output Voltage—High Power In PIN = 5 dBm, 400 mV rms 2.81 V Output Voltage—Low Power In PIN = −21 dBm, 20 mV rms 0.15 V Temperature Sensitivity PIN = −5 dBm

RMS CONVERSION (f = 900 MHz) Input RFIN to Output VRMS

Input Impedance 52||0.9 Ω||pF Input Return Loss 17.5 dB Dynamic Range

±0.25 dB Error ±0.25 dB Error V ±1 dB Error V ±2 dB Error

V

Maximum Input Level ±1 dB error Minimum Input Level ±1 dB error Conversion Gain V Output Intercept Output Voltage—High Power In PIN = 5 dBm, 400 mV rms 2.53 V Output Voltage—Low Power In PIN = −21 dBm, 20 mV rms 0.14 V Temperature Sensitivity PIN = −5 dBm

1

CW input, −40°C < T

4

Delta from 25°C, V

2

V

2

V

2

V

3

0.03 V

1

CW input, −40°C < T

4

Delta from 25°C, V

2

V

2

V

2

V

3

0.03 V

= 3 V 20 dB

S

= 5 V 24 dB

S

= 3 V 25 dB

S

= 5 V 29 dB

S

= 3 V 28 dB

S

= 5 V 33 dB

S

OUT

25°C ≤ T

−40°C ≤ T

= 3 V 20 dB

S

= 5 V 23 dB

S

= 3 V 24 dB

S

= 5 V 27 dB

S

= 3 V 27 dB

S

= 5 V 30 dB

S

OUT

25°C ≤ T

−40°C ≤ T

2

5 dBm

2

−20 dBm

= (gain × VIN) + intercept 7.1 V/V rms

≤ 85°C

A

≤ +25°C

A

2

6 dBm

2

−18 dBm

= (gain × VIN) + intercept 6.3 V/V rms

≤ +85°C

A

≤ +25°C

A

< +85°C

A

= 5 V 32 dB

S

0.0016 dB/°C

−0.0002 dB/°C

< +85°C

A

= 5 V 33 dB

S

0.0019 dB/°C

−0.0002 dB/°C

Rev. B | Page 4 of 28

ADL5501

Parameter Condition Min Typ Max Unit

RMS CONVERSION (f = 1900 MHz) Input RFIN to Output VRMS

Input Impedance +33||−0.1 Ω||pF Input Return Loss 15 dB Dynamic Range

±0.25 dB Error ±0.25 dB Error V ±1 dB Error V ±2 dB Error

V

Maximum Input Level ±1 dB error Minimum Input Level ±1 dB error Conversion Gain V Output Intercept Output Voltage—High Power In PIN = 5 dBm, 400 mV rms 2.20 V Output Voltage—Low Power In PIN = −21 dBm, 20 mV rms 0.12 V Temperature Sensitivity PIN = −5 dBm

RMS CONVERSION (f = 2350 MHz) Input RFIN to Output VRMS

Input Impedance +32||−0.3 Ω||pF Input Return Loss 13.6 dB Dynamic Range

±0.25 dB Error ±0.25 dB Error V ±1 dB Error V ±2 dB Error

V

Maximum Input Level ±1 dB error Minimum Input Level ±1 dB error Conversion Gain V Output Intercept Output Voltage—High Power In PIN = 5 dBm, 400 mV rms 2.00 V Output Voltage—Low Power In PIN = −21 dBm, 20 mV rms 0.10 V Temperature Sensitivity PIN = −5 dBm

1

CW input, −40°C < T

4

Delta from 25°C, V

2

V

2

V

2

V

3

0.02 V

1

CW input, −40°C < T

4

Delta from 25°C, V

2

V

2

V

2

V

3

0.02 V

= 3 V 5 dB

S

= 5 V 7 dB

S

= 3 V 25 dB

S

= 5 V 29 dB

S

= 3 V 28 dB

S

= 5 V 32 dB

S

OUT

25°C ≤ T

−40°C ≤ T

= 3 V 4 dB

S

= 5 V 7 dB

S

= 3 V 25 dB

S

= 5 V 29 dB

S

= 3 V 29 dB

S

= 5 V 32 dB

S

OUT

25°C ≤ T

−40°C ≤ T

2

7 dBm

2

−19 dBm

= (gain × VIN) + intercept 5.5 V/V rms

≤ 85°C

A

≤ +25°C

A

2

8 dBm

2

−18 dBm

= (gain × VIN) + intercept 5.0 V/V rms

≤ 85°C

A

≤ +25°C

A

< +85°C

A

= 5 V 32 dB

S

0.0031 dB/°C

−0.0034 dB/°C

< +85°C

A

= 5 V 8 dB

S

0.0032 dB/°C

−0.0044 dB/°C

Rev. B | Page 5 of 28

ADL5501

Parameter Condition Min Typ Max Unit

RMS CONVERSION (f = 2700 MHz) Input RFIN to Output VRMS

Input Impedance +35||−0.5 Ω||pF Input Return Loss 13 dB Dynamic Range

±0.25 dB Error ±0.25 dB Error V ±1 dB Error V ±2 dB Error

V Maximum Input Level ±1 dB error Minimum Input Level ±1 dB error Conversion Gain V Output Intercept Output Voltage—High Power In PIN = 5 dBm, 400 mV rms 1.84 V Output Voltage—Low Power In PIN = –21 dBm, 20 mV rms 0.09 V Temperature Sensitivity PIN = –5 dBm

RMS CONVERSION (f = 4000 MHz) Input RFIN to Output VRMS

Input Impedance +41||−0.1 Ω||pF Input Return Loss 20.8 dB Dynamic Range

±0.25 dB Error

V

±1 dB Error

V

±2 dB Error

V

Maximum Input Level ±1 dB error Minimum Input Level ±1 dB error Conversion Gain V Output Intercept Output Voltage—High Power In PIN = 5 dBm, 400 mV rms 1.53 V Output Voltage—Low Power In PIN = –21 dBm, 20 mV rms 0.07 V Temperature Sensitivity PIN = –5 dBm

1

CW input, −40°C < T

4

Delta from 25°C, V

2

V

2

V

2

V

3

0.02 V

1

CW input, −40°C < T

4

Delta from 25°C, V

2

V

2

V

2

V

3

0.01 V

= 3 V 3 dB

S

= 5 V 7 dB

S

= 3 V 25 dB

S

= 5 V 30 dB

S

= 3 V 28 dB

S

= 5 V 33 dB

S

OUT

25°C ≤ T

−40°C ≤ T

= 3 V 4 dB

S

= 5 V 5 dB

S

= 3 V 28 dB

S

= 5 V 31 dB

S

= 3 V 30 dB

S

= 5 V 33 dB

S

OUT

25°C ≤ T

−40°C ≤ T

2

8 dBm

2

−17 dBm

= (gain × VIN) + intercept 4.6 V/V rms

≤ 85°C

A

≤ +25°C

A

2

10 dBm

2

−18 dBm

= (gain × VIN) + intercept 3.8 V/V rms

≤ 85°C

A

≤ +25°C

A

< +85°C

A

= 5 V 5 dB

S

0.0034 dB/°C

−0.0049 dB/°C

< +85°C

A

= 5 V 5 dB

S

0.0019 dB/°C

−0.0043 dB/°C

Rev. B | Page 6 of 28

ADL5501

Parameter Condition Min Typ Max Unit

RMS CONVERSION (f = 5000 MHz) Input RFIN to Output VRMS

Input Impedance +51||−0.2 Ω||pF Input Return Loss 17 dB Dynamic Range

±0.25 dB Error ±0.25 dB Error V ±1 dB Error V ±2 dB Error

V

Maximum Input Level ±1 dB error Minimum Input Level ±1 dB error Conversion Gain V Output Intercept Output Voltage—High Power In PIN = 5 dBm, 400 mV rms 1.33 V Output Voltage—Low Power In PIN = –21 dBm, 20 mV rms 0.08 V Temperature Sensitivity PIN = –5 dBm

RMS CONVERSION (f = 6000 MHz) Input RFIN to Output VRMS

Input Impedance +86||−0.1 Ω||pF Input Return Loss 10.1 dB Dynamic Range

±0.25 dB Error ±0.25 dB Error V ±1 dB Error V ±2 dB Error

V

Maximum Input Level ±1 dB error Minimum Input Level ±1 dB error Conversion Gain V Output Intercept Output Voltage—High Power In PIN = 5 dBm, 400 mV rms 0.97 V Output Voltage—Low Power In PIN = –21 dBm, 20 mV rms 0.07 V Temperature Sensitivity PIN = –5 dBm

1

CW input, −40°C < T

4

Delta from 25°C, V

2

V

2

V

2

V

3

0.02 V

1

CW input, −40°C < T

4

Delta from 25°C, V

2

V

2

V

2

V

3

0.02 V

= 3 V 5 dB

S

= 5 V 5 dB

S

= 3 V 31 dB

S

= 5 V 35 dB

S

= 3 V 34 dB

S

= 5 V 38 dB

S

OUT

25°C ≤ T

−40°C ≤ T

= 3 V 20 dB

S

= 5 V 20 dB

S

= 3 V 31 dB

S

= 5 V 31 dB

S

= 3 V 35 dB

S

= 5 V 35 dB

S

OUT

25°C ≤ T

−40°C ≤ T

2

15 dBm

2

−20 dBm

= (gain × VIN) + intercept 3.3 V/V rms

≤ 85°C

A

≤ +25°C

A

2

14 dBm

2

−17 dBm

= (gain × VIN) + intercept 2.4 V/V rms

≤ 85°C

A

≤ +25°C

A

< +85°C

A

= 5 V 5 dB

S

0.0001 dB/°C

−0.0031 dB/°C

< +85°C

A

= 5 V 25 dB

S

0.0017 dB/°C

−0.0008 dB/°C

Rev. B | Page 7 of 28

ADL5501

Parameter Condition Min Typ Max Unit

OUTPUT OFFSET No signal at RFIN 50 150 mV ENABLE INTERFACE Pin ENBL

Logic Level to Enable Power, High Condition 2.7 V ≤ VS ≤ 5.5 V, −40°C < TA < +85°C 1.8 V

Input Current when High 2.7 V at ENBL, –40°C ≤ TA ≤ +85°C 0.05 0.1 μA Logic Level to Disable Power, Low Condition 2.7 V ≤ VS ≤ 5.5 V, −40°C < TA < +85°C –0.5 +0.5 V Power-Up Response Time5 C C C

= C

FLTR

= 1 nF, C

FLTR

= open, C

FLTR

= open, 0 dBm at RFIN 6 μs

OUT

= open, 0 dBm at RFIN 21 μs

OUT

= 100 nF, 0 dBm at RFIN 28 μs

OUT

POWER SUPPLIES

Operating Range −40°C < TA < +85°C 2.7 5.5 V Quiescent Current No signal at RFIN6 1.1 mA Total Supply Current When Disabled No signal at RFIN, ENBL input low 0.1 <5 μA

1

The available output swing and, therefore, the dynamic range are altered by the supply voltage; see Figure 8.

2

Error referred to best-fit line at 25°C.

3

Calculated using linear regression.

4

Error referred to delta from 25°C response; see Figure 13, Figure 14, Figure 15, Figure 19, Figure 20, and Figure 21.

5

The response time is measured from 10% to 90% of settling level; see Figure 30.

6

Supply current is input-level dependent; see Figure 6.

V

POS

Rev. B | Page 8 of 28

ADL5501

ABSOLUTE MAXIMUM RATINGS

Table 2.

Parameter Rating

Supply Voltage VS 5.5 V

VRMS 0 V, VS

RFIN 1.25 V rms

Equivalent Power, re: 50 Ω 15 dBm

Internal Power Dissipation 80 mW

θJA (SC-70) 494°C/W

Maximum Junction Temperature 125°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. B | Page 9 of 28

ANALOG DEVICES ADL5501 Service Manual

FEATURES

APPLICATIONS

GENERAL DESCRIPTION

FUNCTIONAL BLOCK DIAGRAM

TABLE OF CONTENTS

REVISION HISTORY

SPECIFICATIONS

ABSOLUTE MAXIMUM RATINGS

ESD CAUTION