Analog Devices AD8364 prc Datasheet

LF to 2.7GHz Dual 60dB TruPwr Detector

PRELIMINARY TECHNICAL DATA

FEATURES

RMS Measurement of High Crest-Factor Signals Dual Channel and Difference Outputs ports Integrated accurately scaled Temperature Sensor Wide Dynamic Range ±1 dB over 60 dB @2.2 GHz ±0.5 dB Temperature-Stable Linear-in-dB Response Low log conformance ripple +5V Operation at 70 mA, –40°C to +85°C Small footprint 5x5 mm LFCSP Package

APPLICATIONS

Wireless Infrastructure Power Amplifier Linearization/Control Antenna VSWR Monitor Devices Gain Control and Measurement Transmitter Signal Strength Indication (TSSI) Dual-Channel Wireless Infrastructure Radios

GENERAL DESCRIPTION

The AD8364 is a true RMS responding dual channel RF power measurement subsystem for the precise measurement and control of signal power. The flexibility of the AD8364 allows communications systems and instrumentation, such as RF power amplifiers and radio transceiver AGC circuits, to be monitored and controlled with ease. Operating on a single 5V supply, each channel is fully specified for operation up to 2.7GHz, over a dynamic range of 60dB. The AD8364 provides accurately scaled, independent, RMS outputs of both RF measurement channels. A useful measurement difference between the two channels is also made available. On chip channel matching makes the RMS difference output extremely stable with temperature and process variations. The device also includes a useful temperature sensor with an accurately scaled voltage proportional to temperature, specified over the device operating temperature range. The AD8364 can be used with input signals having RMS values from 55dBm to +5dBm, Re: 50Ω and large crest factors with no accuracy degradation.

Integrated in the AD8364 are two well-matched AD8362 channels (see AD8362 data sheet for more info). Enhancements include improved temperature performance and reduced log-conformance ripple versus the AD8362. On chip wide bandwidth op-amps are connected to accommodate flexible configurations that support many system solutions.

AD8364

FUNCTIONAL BLOCK DIAGRAM

DECA

COMA

Channel A

TruPwr™

Channel B

TruPwr™

DECB

COMB ADJB ADJA

OUTA OUTB

C to +85oC.

VPSR ACMB TEMPACMA CLPA

TEMP

V2I

BIAS

VREF VLVL CLPB

VSTA

OUTA

FBKA

OUTP

OUTN

FBKB

OUTB

VSTB

CHPA

24 23 22 21 20 19 1718

VPSA

INHA

INLA

PWD

COMR

INLB INHB

VPSB

1 2 3 4 5 6

CHPB

Figure 1. Functional Block Diagram

The device can easily be configured to provide three RMS measurements simultaneously. Linear-in-dB RMS measurements are supplied at OUTA and OUTB, with conveniently scaled slope of 50mV/dB. The RMS difference between OUTA and OUTB is available differentially or single-ended at OUTP and OUTN. An optional voltage applied to VLVL provides a common mode reference level to offset OUTP and OUTN above ground.

Each channel of the AD8364 can independently be used to control separate gain control feedback loops using VSTA and VSTB. The difference outputs also provide feedback control while providing improved temperature stability through matched channels. Flexibility exists to use either channel as a reference while the other channel is slaved through a feedback loop. RF power amplifier control, VSWR measurements, and transceiver AGC circuits benefit from this feature. In control modes, the opposite polarities of the OUTP and OUTN outputs allow proportional or complementary gain-control functions, eliminating the need for a board-level signinverting amplifier. Feedback pins FBKA and FBKB allow custom loop regulation in special control system applications and log-slope adjust flexibility. When one channel is slaved off the other, controlling the voltage at VLVL will adjust the slaved channel’s RMS value, if a power level offset is desired.

The AD8364 is supplied in a 32-lead 5x5mm LFCSP package, for the operating temperature of –40

Rev. PrC 1/20/2005

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 Anal og Devices. Trademarks and registered trademarks are the property of their respective companies.

PRELIMINARY TECHNICAL DATA

=VPSA=VPSB=VPSR =5V, T

AD8364-SPECIFICATIONS

Table I.

VST[A,B] = OUT[A,B], OUT[P,N] = FBK[A,B], differential input via Balun input f ≤ 2.7GHz unless otherwise noted)

AD8364

=25°C, Chan A

= Chan B

FREQ

, VLVL = VREF,

FREQ

, CW

Parameters Conditions Min Typ Max Units

OVERALL FUNCTION

SIGNAL INPUT INTERFACE

Channel A and Channel B, CW sine wave input

INH[A,B] (Pins 26, 31) INL[A,B] (Pins 27, 30)

Specified Frequency Range LF 2.7 GHz

DC Common-Mode Voltage 2.5 V

SIGNAL OUTPUT INTERFACE

Small Signal Bandwidth

Slew Rate

Settling Time 10%-100% response of -45 dBm to 0 dBm modulated

100%-10% response of 0 dBm to -45 dBm modulated

Wideband Noise

MEASUREMENT MODE

450 MHz OPERATION

± 1 dB Dynamic Range

OUT[A,B] (Pins 15,10)

= C

LPA

pulse, C

pulse, C CLPF = 1000pF, f

≤ 300pF

LPB

= C

≤ 300pF

LPB

=Open

LPA=CLPB

=Open,

LPA=CLPB

≤ 100KHz

SPOT

ADJA = ADJB = 0 V, Error Referred to Best Fit Line using Linear Regression @ P T

= 25oC, Balun = M/A-Com MABAES0054

-40dBm & -20dBm,

INH[A,B] =

Pins OUT[A,B]

TBD MHz

TBD

V/µS

µS

TBD nS

TBD

nV/√Hz

67 dB

-40oC < TA < +85oC 65 dB

±0.5 dB Dynamic Range -40oC < TA < +85oC 30 dB

Maximum Input Level ±1dB Error +15 dBm

Minimum Input Level ±1dB Error -52 dBm

Slope 50 mV/dB

Intercept -55 dBm

Output Voltage – High Power In

Output Voltage – Low Power In

Temperature Sensitivity

Pins OUT[A,B] @ P

Deviation from OUT[A,B] @ 25°C

-40°C<TA<85°C; P

Deviation from OUT[P,N] @ 25°C

-40°C<TA<85°C; P

-40°C<T

<85°C; P

INH[A,B]

= -10dBm

= -40dBm

TBD 2.2 TBD

TBD 0.7 TBD

= -10dBm +/- 0.5 dB

INH[A,B]

= -25dBm +/- 0.5 dB

INH[A,B]

= -40dBm +/- 0.5 dB

INH[A,B]

= -10dBm, -10dBm +/- 0.3 dB

INH[A,B]

= -10dBm, -30dBm

INH[A,B]

= -10dBm, -40dBm

INH[A,B]

+/- 0.3

Deviation from CW Response 5.5dB Peak-to-RMS Ratio (WCDMA 1 Channel) TBD dB

12dB Peak-to-RMS Ratio (WCDMA 3 Channels) TBD dB

18dB Peak-to-RMS Ratio (WCDMA 4 Channels) TBD dB

Rev. PrC Ι Page 2 of 23

PRELIMINARY TECHNICAL DATA AD8364

=VPSA=VPSB=VPSR =5V, T

AD8364-SPECIFICATIONS

Table I.

VST[A,B] = OUT[A,B], OUT[P,N] = FBK[A,B], differential input via Balun input f ≤ 2.7GHz unless otherwise noted)

Parameters Conditions Min Typ Max Units

InputA to InputB Isolation 30 dB

InputA to OUTB isolation

InputB to OUTA isolation (Note 1)

= -50dBm, OUTB = OUTB

INHB

= -50dBm, OUTA = OUTA

INHA

Input Impedance INHA/INLA, INHB/INLB Differential Drive

INHA/INLA, INHB/INLB Single-ended Drive

Input Return Loss With Recommended Balun TBD

MEASUREMENT MODE

ADJA = ADJB = 0 V, Error Referred to Best Fit Line

using Linear Regression @ P

880MHz OPERATION

± 1 dB Dynamic Range

= 25oC, Balun = M/A-Com ETC 1.6-4-2-3

Pins OUT[A,B]

-40oC < TA < +85oC 54 dB

±0.5 dB Dynamic Range -40oC < TA < +85oC 49 dB

Maximum Input Level ±1dB Error -2 dBm

Minimum Input Level ±1dB Error -61 dBm

Slope 50 mV/dB

Intercept -61 dBm

Output Voltage – High Power In

Output Voltage – Low Power In

Temperature Sensitivity

Pins OUT[A,B] @ P

Deviation from OUT[A,B] @ 25°C

-40°C<TA<85°C; P

Deviation from OUT[P,N] @ 25°C

-40°C<TA<85°C; P

-40°C<T

<85°C; P

= -10dBm

INH[A,B]

= -40dBm

INH[A,B]

= -10dBm +/- 0.5 dB

INH[A,B]

= -25dBm +/- 0.5 dB

INH[A,B]

= -40dBm +/- 0.5 dB

INH[A,B]

= -25dBm, -10dBm +/- 0.3 dB

INH[A,B]

= -25dBm, -25dBm

INH[A,B]

= -25dBm, -40dBm

INH[A,B]

Deviation from CW Response 5.5dB Peak-to-RMS Ratio (WCDMA 1 Channel) 0.2 dB

12dB Peak-to-RMS Ratio (WCDMA 3 Channels) 0.3 dB

18dB Peak-to-RMS Ratio (WCDMA 4 Channels) 0.3 dB

InputA to InputB Isolation dB

InputA to OUTB isolation

InputB to OUTA isolation (Note 1)

= -50dBm, OUTB = OUTB

INHB

= -50dBm, OUTA = OUTA

INHA

Input Impedance INHA/INLA, INHB/INLB Differential Drive

INHA/INLA, INHB/INLB Single-ended Drive

Input Return Loss With Recommended Balun TBD

=25°C, Chan A

± 1 dB

PINHB

± 1 dB

PINHA

-40dBm & -20dBm,

INH[A,B] =

± 1 dB

PINHB

± 1 dB

PINHA

= Chan B

FREQ

, VLVL = VREF,

FREQ

TBD

210||0.1

TBD||TBD

59 dB

TBD 2.75 TBD

TBD 1.1 TBD

+/- 0.3

TBD

200||0.3

TBD||TBD

, CW

Ω||pF

Rev. PrC Ι Page 3 of 23

PRELIMINARY TECHNICAL DATA AD8364

=VPSA=VPSB=VPSR =5V, T

AD8364-SPECIFICATIONS

Table I.

VST[A,B] = OUT[A,B], OUT[P,N] = FBK[A,B], differential input via Balun input f ≤ 2.7GHz unless otherwise noted)

Parameters Conditions Min Typ Max Units

MEASUREMENT MODE

ADJA = ADJB = 0.75 V, Error Referred to Best Fit Line

using Linear Regression @ P

1880 MHz OPERATION

± 1 dB Dynamic Range

= 25oC, Balun = M/A-Com ETC 1.6-4-2-3

Pins OUT[A,B]

-40oC < TA < +85oC 52 dB

±0.5 dB Dynamic Range -40oC < TA < +85oC 49 dB

Maximum Input Level ±1dB Error -5 dBm

Minimum Input Level ±1dB Error -62 dBm

Slope 50 mV/dB

Intercept -62 dBm

Output Voltage – High Power In

Output Voltage – Low Power In

Temperature Sensitivity

Pins OUT[A,B] @ P

Deviation from OUT[A,B] @ 25°C

-40°C<TA<85°C; P

Deviation from OUT[P,N] @ 25°C

-40°C<TA<85°C; P

-40°C<T

<85°C; P

= -10dBm

INH[A,B]

= -40dBm

INH[A,B]

= -10dBm +/- 0.5 dB

INH[A,B]

= -25dBm +/- 0.5 dB

INH[A,B]

= -40dBm +/- 0.5 dB

INH[A,B]

= -25dBm, -10dBm +/- 0.3 dB

INH[A,B]

= -25dBm, -25dBm

INH[A,B]

= -25dBm, -40dBm

INH[A,B]

Deviation from CW Response 5.5dB Peak-to-RMS Ratio (WCDMA 1 Channel) TBD dB

12dB Peak-to-RMS Ratio (WCDMA 3 Channels) TBD dB

18dB Peak-to-RMS Ratio (WCDMA 4 Channels) TBD dB

InputA to InputB Isolation dB

InputA to OUTB isolation

InputB to OUTA isolation (Note 1)

= -50dBm, OUTB = OUTB

INHB

= -50dBm, OUTA = OUTA

INHA

Input Impedance INHA/INLA, INHB/INLB Differential Drive

INHA/INLA, INHB/INLB Single-ended Drive

Input Return Loss With Recommended Balun TBD

MEASUREMENT MODE

ADJA = ADJB = 1.02 V, Error Referred to Best Fit Line

using Linear Regression @ P

2.14 GHz OPERATION

± 1 dB Dynamic Range

= 25oC, Balun = M/A-Com ETC 1.6-4-2-3

Pins OUT[A,B]

-40oC < TA < +85oC 51 dB

±0.5 dB Dynamic Range -40oC < TA < +85oC 45 dB

Maximum Input Level ±1dB Error -2 dBm

Minimum Input Level ±1dB Error -58 dBm

=25°C, Chan A

-40dBm & -20dBm,

INH[A,B] =

± 1 dB

PINHB

± 1 dB

PINHA

-40dBm & -20dBm,

INH[A,B] =

= Chan B

FREQ

, VLVL = VREF,

FREQ

57 dB

TBD 2.5 TBD

TBD 1.0 TBD

+/- 0.3

TBD

167||0.14

TBD||TBD

56 dB

, CW

Ω||pF

Rev. PrC Ι Page 4 of 23

PRELIMINARY TECHNICAL DATA AD8364

=VPSA=VPSB=VPSR =5V, T

AD8364-SPECIFICATIONS

Table I.

VST[A,B] = OUT[A,B], OUT[P,N] = FBK[A,B], differential input via Balun input f ≤ 2.7GHz unless otherwise noted)

Parameters Conditions Min Typ Max Units

Slope 50 mV/dB

Intercept -58 dBm

Output Voltage – High Power In

Output Voltage – Low Power In

Temperature Sensitivity

Pins OUT[A,B] @ P

Deviation from OUT[A,B] @ 25°C

-40°C<TA<85°C; P

Deviation from OUT[P,N] @ 25°C

-40°C<TA<85°C; P

-40°C<T

<85°C; P

= -10dBm

INH[A,B]

= -40dBm

INH[A,B]

= -10dBm +/- 0.5 dB

INH[A,B]

= -25dBm +/- 0.5 dB

INH[A,B]

= -40dBm +/- 0.5 dB

INH[A,B]

= -25dBm, -10dBm +/- 0.3 dB

INH[A,B]

= -25dBm, -25dBm

INH[A,B]

= -25dBm, -40dBm

INH[A,B]

Deviation from CW Response 5.5dB Peak-to-RMS Ratio (WCDMA 1 Channel) 0.2 dB

12dB Peak-to-RMS Ratio (WCDMA 3 Channels) 0.3 dB

18dB Peak-to-RMS Ratio (WCDMA 4 Channels) 0.3 dB

InputA to InputB Isolation dB

InputA to OUTB isolation

InputB to OUTA isolation (Note 1)

= -50dBm, OUTB = OUTB

INHB

= -50dBm, OUTA = OUTA

INHA

Input Impedance INHA/INLA, INHB/INLB Differential Drive

INHA/INLA, INHB/INLB Single-ended Drive

Input Return Loss With Recommended Balun TBD

MEASUREMENT MODE

ADJA = ADJB = 1.14 V, Error Referred to Best Fit Line

using Linear Regression @ P

2.5 GHz OPERATION

± 1 dB Dynamic Range

= 25oC, Balun = M/A-Com ETC 1.6-4-2-3

Pins OUT[A,B]

-40oC < TA < +85oC 52 dB

±0.5 dB Dynamic Range -40oC < TA < +85oC 42 dB

Maximum Input Level ±1dB Error 5 dBm

Minimum Input Level ±1dB Error -53 dBm

Slope 50 mV/dB

Intercept -53 dBm

Output Voltage – High Power In

Output Voltage – Low Power In

Pins OUT[A,B] @ P

INH[A,B]

= -10dBm

= -40dBm

=25°C, Chan A

± 1 dB

PINHB

± 1 dB

PINHA

-40dBm & -20dBm,

INH[A,B] =

= Chan B

FREQ

, VLVL = VREF,

FREQ

TBD 2.3 TBD

TBD 0.85 TBD

+/- 0.3

TBD

150||1.9

TBD||TBD

58 dB

TBD 2.1 TBD

TBD 0.65 TBD

, CW

Ω||pF

Rev. PrC Ι Page 5 of 23

PRELIMINARY TECHNICAL DATA AD8364

=VPSA=VPSB=VPSR =5V, T

AD8364-SPECIFICATIONS

Table I.

VST[A,B] = OUT[A,B], OUT[P,N] = FBK[A,B], differential input via Balun input f ≤ 2.7GHz unless otherwise noted)

Parameters Conditions Min Typ Max Units

Temperature Sensitivity

-40°C<TA<85°C; P

Deviation from OUT[A,B] @ 25°C

= -10dBm +/- 0.5 dB

INH[A,B]

= -25dBm +/- 0.5 dB

INH[A,B]

= -40dBm +/- 0.5 dB

INH[A,B]

Deviation from OUT[P,N] @ 25°C

= -25dBm, -10dBm +/- 0.3 dB

INH[A,B]

-40°C<T

<85°C; P

= -25dBm, -25dBm

INH[A,B]

= -25dBm, -40dBm

INH[A,B]

Deviation from CW Response 5.5dB Peak-to-RMS Ratio (WCDMA 1 Channel) TBD dB

12dB Peak-to-RMS Ratio (WCDMA 3 Channels) TBD dB

18dB Peak-to-RMS Ratio (WCDMA 4 Channels) TBD dB

InputA to InputB Isolation dB

InputA to OUTB isolation

InputB to OUTA isolation (Note 1)

= -50dBm, OUTB = OUTB

INHB

= -50dBm, OUTA = OUTA

INHA

Input Impedance INHA/INLA, INHB/INLB Differential Drive

INHA/INLA, INHB/INLB Single-ended Drive

Input Return Loss With Recommended Balun TBD

MEASUREMENT MODE

ADJA = ADJB = 1.18 V, Error Referred to Best Fit Line

using Linear Regression @ P

2.7 GHz OPERATION

± 1 dB Dynamic Range

= 25oC, Balun = M/A-Com ETC 1.6-4-2-3

Pins OUT[A,B]

-40oC < TA < +85oC 55 dB

±0.5 dB Dynamic Range -40oC < TA < +85oC 45 dB

Maximum Input Level ±1dB Error 10 dBm

Minimum Input Level ±1dB Error -50 dBm

Slope 49 mV/dB

Intercept -51 dBm

Output Voltage – High Power In

Output Voltage – Low Power In

Temperature Sensitivity

-40°C<TA<85°C; P

Pins OUT[A,B] @ P

INH[A,B]

= -10dBm

= -40dBm

Deviation from OUT[A,B] @ 25°C

= -10dBm +/- 0.5 dB

INH[A,B]

= -25dBm +/- 0.5 dB

INH[A,B]

= -40dBm +/- 0.5 dB

INH[A,B]

=25°C, Chan A

± 1 dB

PINHB

± 1 dB

PINHA

-40dBm & -20dBm,

INH[A,B] =

= Chan B

FREQ

, VLVL = VREF,

FREQ

+/- 0.3

TBD

150||1.7

TBD||TBD

60 dB

TBD 2.0 TBD

TBD 0.5 TBD

, CW

Ω||pF

Rev. PrC Ι Page 6 of 23

PRELIMINARY TECHNICAL DATA AD8364

=VPSA=VPSB=VPSR =5V, T

AD8364-SPECIFICATIONS

Table I.

VST[A,B] = OUT[A,B], OUT[P,N] = FBK[A,B], differential input via Balun input f ≤ 2.7GHz unless otherwise noted)

Parameters Conditions Min Typ Max Units

-40°C<TA<85°C; P

Deviation from OUT[P,N] @ 25°C

= -25dBm, -10dBm +/- 0.3 dB

INH[A,B]

-40°C<T

<85°C; P

= -25dBm, -25dBm

INH[A,B]

= -25dBm, -40dBm

INH[A,B]

Deviation from CW Response 5.5dB Peak-to-RMS Ratio (WCDMA 1 Channel) TBD dB

12dB Peak-to-RMS Ratio (WCDMA 3 Channels) TBD dB

18dB Peak-to-RMS Ratio (WCDMA 4 Channels) TBD dB

InputA to InputB Isolation TBD dB

InputA to OUTB isolation

InputB to OUTA isolation (Note 1)

= -50dBm, OUTB = OUTB

INHB

= -50dBm, OUTA = OUTA

INHA

Input Impedance INHA/INLA, INHB/INLB Differential Drive

INHA/INLA, INHB/INLB Single-ended Drive

Input Return Loss With Recommended Balun TBD

OUTPUT INTERFACE

Voltage Range Min

Voltage Range Max

Source/Sink Current

SET-POINT INPUT

Voltage Range

Pin OUTA and OUTB

≥ 200Ω to ground

OUTA & OUTB held at V

/2, to 1% change

Pin VSTA and VSTB

Law conformance error ≤ ±1dB

Input Resistance 68

Logarithmic Scale Factor

Logarithmic Intercept

f = 450MHz??, -40°C ≤ T

≤ +85°C

≤ +85°C, Re: 50Ω

Temperature Sensitivity Pin = -10dBm, slope and intercept errors combined TBD

DIFFERENCE OUTPUT

Voltage Range Min

Voltage Range Max

Source/Sink Current

Small Signal Bandwidth

Slew Rate

Wideband Noise

Offset

Pin OUTP and OUTN

≥ 200Ω to ground

OUTP and OUTN held at V

≤ 300pF

CLPF = 1000pF, f

SPOT

/2, to 1% change

≤ 100KHz

OUTB=OUTA=open, OUTP=FBKA=open, VLVL=open

=25°C, Chan A

± 1 dB

PINHB

± 1 dB

PINHA

= Chan B

FREQ

+/- 0.3

, VLVL = VREF,

FREQ

, CW

TBD

200||0.08

TBD||TBD

Ω||pF

0.09

VS-0.05

70 mA

0.5 3.75 V

KΩ

50 mV/dB

-55 dBm

dB/°C

0.1

VS-0.15

70 mA

TBD MHz

TBD

V/µS

nV/√Hz

TBD mV

DIFFERENCE LEVEL ADJUST

Voltage Range

Pin VLVL OUT[P,N]=FBK[A,B} (through Cap)

OUT[P,N] Voltage Range OUT[P,N]=FBK[A,B} (through Cap)

0 TBD V

Input Resistance 1

Rev. PrC Ι Page 7 of 23

KΩ

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