Analog Devices ADL5570, AD8363 Datasheet

50 Hz to 6 GHz

Preliminary Technical Data

FEATURES

Accurate RMS-to-DC conversion from 50 Hz to 6 GHz Single ended input dynamic range of >50 dB Waveform and modulation independent, such as

WiMAX/GSM/CDMA/WCDMA/TDMA Linear-in-decibels output, scaled 50 mV/dB Log conformance error of <0.3 dB Temperature stability of <±0.5 dB Voltage supply range of 4.5 V to 5.5 V Operating temperature range of −40°C to +125°C Power-down capability

APPLICATIONS

Power amplifier linearization/control loops Transmitter power controls Transmitter signal strength indication (TSSI) RF instrumentation

50 dB TruPwr™ Detector

AD8363

FUNCTIONAL BLOCK DIAGRAM

Figure 1.

GENERAL DESCRIPTION

The AD8363 is a true RMS responding power detector that has more than 50 dB measurement range when driven with a single-ended 50 Ω source. The device provides a solution in a variety of high frequency communication systems, and in instrumentation, requiring an accurate response to signal power. The AD8363 is easy to use with its single-ended 50 Ω input, only requiring a single 5 V supply, and a few capacitors. The AD8363 can operate from arbitrarily low frequencies to 6 GHz and can accept inputs that have RMS values from less than

-50 dBm to at least 0 dBm, with large crest factors, exceeding the requirements for accurate measurement of WiMAX, WCDMA, and CDMA signals.

The AD8363 can determine the true power of a high frequency signal having a complex low frequency modulation envelope, or can be used as a simple low frequency RMS voltmeter. The high-pass corner generated by its internal offset-nulling loop can be lowered by a capacitor added on the CHPF pin.

Used as a power measurement device, VOUT is connected to VSET. The output is then proportional to the logarithm of the RMS value of the input. In other words, the reading is presented directly in decibels and is conveniently scaled 1 V per decade, or 50 mV/dB; other slopes are easily arranged. In controller mode, the voltage applied to VSET determines the power level required at the input to null the deviation from the set point. The output buffer can provide high load currents.

The AD8363 has 1.5 mW power consumption when powered down by a logic high applied to pin 1, TCM2. It powers up within about 30 μs to its nominal operating current of 60 mA at 25°C. The AD8363 is supplied in a 4 mm x 4 mm, 16-lead LFCSP for operation over the temperature range of −40°C to +125°C. An evaluation board is available.

Rev. PrA

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.

AD8363 Preliminary Technical Data

SPECIFICATIONS

Pins 3, 10 - VPOS = VS = 5 V, T = 25°C, ZO = 50 Ω, Single ended input drive, VOUT tied to VSET, VTGT = 1.4, CLPF= 3.9 nF, CHPF=2.7 nF,

Error referred to best-fit line (linear regression),

Table 1.

Parameter Conditions Min Typ Max Unit

OVERALL FUNCTION

Maximum Input Frequency 6 GHz

RF INPUT INTERFACE Pins INHI, INLO, ac-coupled

Input Impedance Single-ended drive 50/TBD Ω/pF Common Mode Voltage 2.7 V

100 MHz Pin 16 - TCM1=0.47V, Pin 1 - TCM2= 1.0V

Output Voltage: High Power in PIN = -10 dBm 2.48 V Output Voltage: Low Power in PIN = -40 dBm 0.93 V ±1.0 dB Dynamic Range CW input, TA = +25°C 62 dB Maximum Input Level, ±1.0 dB 8 Minimum Input Level, ±1.0 dB -54 Deviation vs. Temperature Deviation from output at 25°C

-40°C < TA < +85°C; PIN = -10 dBm

-40°C < TA < +85°C; PIN = -40 dBm Logarithmic Slope 51.8 mV/dB Logarithmic Intercept -58 dBm Deviation from CW Response 13 dB peak-to-rms ratio (WCDMA), over 40 dB dynamic range ±0.1 dB 12 dB peak-to-rms ratio (WiMAX), over 40 dB dynamic range ±0.1 dB

14.0 dB peak-to-rms ratio (16C CDMA2K), over 40 dB dynamic range ±0.1 dB 256 QAM CF=8 ±0.1 dB

Input Impedance Single-ended drive 50/TBD Ω/pF

900 MHz TCM1= 0.48V, TCM2= 1.2V

Output Voltage: High Power in PIN = -10 dBm 2.5 V Output Voltage: Low Power in PIN = -40 dBm 0.91 V ±1.0 dB Dynamic Range CW input, TA = +25°C 52 dB Maximum Input Level, ±1.0 dB -2 Minimum Input Level, ±1.0 dB -54 Deviation vs. Temperature Deviation from output at 25°C

-40°C < TA < +85°C; PIN = -10 dBm

-40°C < TA < +85°C; PIN = -40 dBm Logarithmic Slope 51.9 mV/dB Logarithmic Intercept -57.5 dBm Deviation from CW Response 13 dB peak-to-rms ratio (WCDMA), over 40 dB dynamic range ±0.1 dB 12 dB peak-to-rms ratio (WiMAX), over 40 dB dynamic range ±0.1 dB

14.0 dB peak-to-rms ratio (16C CDMA2K), over 40 dB dynamic range ±0.1 dB 256 QAM CF=8 ±0.1 dB

Input Impedance Single-ended drive 50/TBD Ω/pF

1900 MHz TCM1=0.51V, TCM2= 0.51V

Output Voltage: High Power in PIN = -10 dBm 2.38 V Output Voltage: Low Power in PIN = -40 dBm 0.8 V ±1.0 dB Dynamic Range CW input, TA = +25°C 42 dB Maximum Input Level, ±1.0 dB -10 Minimum Input Level, ±1.0 dB -52 Deviation vs. Temperature Deviation from output at 25°C

-40°C < TA < +85°C; PIN = -10 dBm

-40°C < TA < +85°C; PIN = -40 dBm Logarithmic Slope 52 mV/dB Logarithmic Intercept -55 dBm Deviation from CW Response 13 dB peak-to-rms ratio (WCDMA), over 40 dB dynamic range ±0.1 dB

unless otherwise noted.

±0.5 ±0.6

± 0.5 ± 0.7

± 0.5 ± 0.6

dB dB

Rev. PrA | Page 2 of 15

Preliminary Technical Data AD8363

Parameter Conditions Min Typ Max Unit

12 dB peak-to-rms ratio (WiMAX), over 40 dB dynamic range ±0.1 dB

14.0 dB peak-to-rms ratio (16C CDMA2K), over 40 dB dynamic range ±0.1 dB 256 QAM CF=8 ±0.1 dB

Input Impedance Single-ended drive 50/TBD Ω/pF

2140 MHz TCM1=0.49V, TCM2=1.2V

Output Voltage: High Power in PIN = -10 dBm 2.31 V

Output Voltage: Low Power in PIN = -40 dBm 0.72 V

±1.0 dB Dynamic Range CW input, TA = +25°C 40 dB

Maximum Input Level, ±1.0 dB -10

Minimum Input Level, ±1.0 dB -50

Deviation vs. Temperature Deviation from output at 25°C

-40°C < TA < +85°C; PIN = -10 dBm

-40°C < TA < +85°C; PIN = -40 dBm

Logarithmic Slope 52.5 mV/dB

Logarithmic Intercept -53.5 dBm

Deviation from CW Response 13 dB peak-to-rms ratio (WCDMA), over 40 dB dynamic range ±0.1 dB

12 dB peak-to-rms ratio (WiMAX), over 40 dB dynamic range ±0.1 dB

14.0 dB peak-to-rms ratio (16C CDMA2K), over 40 dB dynamic range ±0.1 dB 256 QAM CF=8 ±0.1 dB

Input Impedance Single-ended drive 50/TBD Ω/pF

2600 MHz TCM1=, TCM2=

Output Voltage: High Power in PIN = -10 dBm 2.15 V

Output Voltage: Low Power in PIN = -40 dBm 0.52 V

±1.0 dB Dynamic Range CW input, TA = +25°C, 35 dB

Maximum Input Level, ±1.0 dB -12

Minimum Input Level, ±1.0 dB -40

Deviation vs. Temperature Deviation from output at 25°C

-40°C < TA < +85°C; PIN = -10 dBm TBD dB

-40°C < TA < +85°C; PIN = -40 dBm TBD dB

Logarithmic Slope 53.2 mV/dB

Logarithmic Intercept -49.9 dBm

Deviation from CW Response 13 dB peak-to-rms ratio (WCDMA), over 40 dB dynamic range ±0.1 dB

12 dB peak-to-rms ratio (WiMAX), over 40 dB dynamic range ±0.1 dB

14.0 dB peak-to-rms ratio (16C CDMA2K), over 40 dB dynamic range ±0.1 dB 256 QAM CF=8 ±0.1 dB

Input Impedance Single-ended drive 50/TBD Ω/pF

3.8 GHz TCM1=0.56V, TCM2=1.0V Output Voltage: High Power in PIN = -15 dBm 2.0 V Output Voltage: Low Power in PIN = -40 dBm 0.5 V ±1.0 dB Dynamic Range CW input, TA = +25°C, 33 dB Maximum Input Level, ±1.0 dB -16 Minimum Input Level, ±1.0 dB -49 Deviation vs. Temperature Deviation from output at 25°C

-40°C < TA < +85°C; PIN = -10 dBm +/- 1.0 dB

-40°C < TA < +85°C; PIN = -40 dBm +/- 0.8 dB Logarithmic Slope 54.7 mV/dB Logarithmic Intercept -50 dBm Deviation from CW Response 13 dB peak-to-rms ratio (WCDMA), over 40 dB dynamic range ±0.1 dB 12 dB peak-to-rms ratio (WiMAX), over 40 dB dynamic range ±0.1 dB

14.0 dB peak-to-rms ratio (16C CDMA2K), over 40 dB dynamic range ±0.1 dB

256 QAM CF=8 ±0.1 dB

5.8 GHz TCM1=0.88V, TCM2= 1.0V Output Voltage: High Power in PIN = -20 dBm 1.5 V Output Voltage: Low Power in PIN = -40 dBm 0.35 V ±1.0 dB Dynamic Range CW input, TA = +25°C 30 dB

±0.6 ±0.5

dB dB

Rev. PrA | Page 3 of 15

AD8363 Preliminary Technical Data

Parameter Conditions Min Typ Max Unit

Maximum Input Level, ±1.0 dB -17 Minimum Input Level, ±1.0 dB -47 Deviation vs. Temperature Deviation from output at 25°C

-40°C < TA < +85°C; PIN = -10 dBm

-40°C < TA < +85°C; PIN = -40 dBm Logarithmic Slope 54.5 mV/dB Logarithmic Intercept -47 dBm Deviation from CW Response 13 dB peak-to-rms ratio (WCDMA), over 40 dB dynamic range ±0.1 dB 12 dB peak-to-rms ratio (WiMAX), over 40 dB dynamic range ±0.1 dB

14.0 dB peak-to-rms ratio (16C CDMA2K), over 40 dB dynamic range ±0.1 dB 256 QAM CF=8 ±0.1 dB OUTPUT INTERFACE Pin 6 - VOUT

Output Swing Voltage Range Min RL≥200 to ground .09 v Voltage Range Max RL≥200 to ground Vs-.15 V Source/Sink Current Out held at Vs/2K, to 1%change 10 mA

± 0.6 ± 0.7

SETPOINT INPUT Pin VSET

Voltage Range Log conformance error ≤1 dB, Min 2140 MHz Log conformance error ≤1 dB, Max 2140 MHz

TBD TBD

Input Resistance 72 kΩ Logarithmic Scale Factor f = 2140MHz, −40°C ≤ TA ≤ +85°C 19 dB/V Logarithmic Intercept f = 2140 MHz, −40°C ≤ TA ≤ +85°C, referred to 50 Ω −TBD dBm

TEMPERATURE COMPENSATION Pin 16 - TCM1, Pin 1 - TCM2

Input Voltage Range 0 2.5 V Input Resistance >1 MΩ

VOLTAGE REFERENCE Pin 11 - VREF

Output Voltage RF in = −55 dBm 2.3 V Current Limit Source/Sink 1% change 5/0.08 mA

TEMPERATURE REFERENCE Pin 8 TEMP

Output Voltage TA = 25°C, RL ≥ 10 kΩ 1.35 V Temperature Coefficient −40°C ≤ TA ≤ +85°C, RL ≥ 10 kΩ 4.8 mV/°C

POWER-DOWN INTERFACE Pin TCM2 (Pin1)

Logic Level to Enable Logic LO enables Max Logic Level to Disable Logic HI disables Min

< Vs -.9 Vs -.8

Input Current Logic HI TCM2 = 5 V <1 µA Logic LO TCM2 = 0 V <1 µA Enable Time

Disable Time

POWER SUPPLY INTERFACE Pin VPOS

Supply Voltage 4.5 5 5.5 V Quiescent Current 25C RF in =-55 dBm 60 mA +85 C 72 mA Supply Current When disabled 310 A

TCM2 LO to OUT at .5 dB of final value,

= 470 pF, C

LPF

= 220 pF, RF in = 0 dBm

HPF

TCM2 HI to OUT at 10% final value, C

= 470 pF, C

LPF

= 220 pF, RF in = 0 dBm

HPF

30 µs

20 µs

dB dB

V V

Rev. PrA | Page 4 of 15

Preliminary Technical Data AD8363

ABSOLUTE MAXIMUM RATINGS

Table 2.

Parameter Rating

Supply Voltage VPOS 5.5 V Input Power (Into Input of Device) 23 dBm Evaluate Equivalent Voltage 2 V rms Internal Power Dissipation 500 mW θJA 125°C/W Maximum Junction Temperature 150°C Operating Temperature Range −40°C to +125°C Storage Temperature Range −65°C to +150°C Lead Temperature (Soldering 60 sec) 300°C

ESD CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although this product features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality.

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. PrA | Page 5 of 15

+ 10 hidden pages