LTC5582

1

Rev. D

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RF INPUT POWER (dBm)

–65

3

2

0

–2

1

–1

–3

–25

–45

–5

5582 TAO1b

5

–35

–55

–15

TC = 25°C

4-CARRIER WCDMA

CW

3-CARRIER CDMA2K

TYPICAL APPLICATION

FEATURES

DESCRIPTION

40MHz to 10GHz

RMS Power Detector with

57dB Dynamic Range

The LTC®5582 is a 40MHz to 10GHz RMS responding

power detector. It is capable of accurate power measure-

ment of an AC signal with wide dynamic range, from

–60dBm to 2dBm depending on frequency. The power

of the AC signal in an equivalent decibel-scaled value

is precisely converted into DC voltage on a linear scale,

independent of the crest factor of the input signal wave-

forms. The LTC5582 is suitable for precision RF power

measurement and level control for a wide variety of RF

standards, including LTE, WiMAX, W-CDMA, CDMA2000,

TD-SCDMA, and EDGE. The DC output is buffered with a

low output impedance amplifier capable of driving a high

capacitance load. Consult factory for more information.

The part is packaged in a 10-lead 3mm × 3mm DFN. It is

pin-to-pin compatible with the LT5570.

All registered trademarks and trademarks are the property of their respective owners. Protected

by U.S. patents, including 7262661, 7317357, 7622981.

40MHz to 6GHz RMS Power Detector

APPLICATIONS

n

Frequency Range: 40MHz to 10GHz

n

Linear Dynamic Range: Up to 57dB

n

Accurate RMS Power Measurement of High Crest

Factor Modulated Waveforms

n

Exceptional Accuracy Over Temperature: ±0.5dB (Typ)

n

Low Linearity Error within Dynamic Range

n

Single-Ended or Differential RF Inputs

n

Fast Response Time: 90ns Rise Time

n

Low Supply Current: 41.6mA at 3.3V (Typ)

n

Small 3mm × 3mm DFN10

n

AEC-Q100 Qualified for Automotive Applications

n

RMS Power Measurement

n

PA Power Control

n

Receive and Transmit Gain Control

n

LTE, WiMAX, W-CDMA, CDMA2K, TD-SCDMA,

EDGE Basestations

n

Point-to-Point Microwave Links

n

RF Instrumentation

VCC

IN+

IN–

VOUT

GND

FLTR

EN

ENABLE

OUT

RT2

DEC

RT1

100nF

1nF

1nF

3.3V

5582 TA01a

LTC5582

1µF

270pF

68

Linearity Error vs RF Input Power

2140MHz Modulated Waveforms