LTC5582_15 Datasheet, PDF (1/16 Pages) Linear Technology – 40MHz to 10GHz RMS Power Detector with 57dB Dynamic Range

LTC5582
40MHz to 10GHz
RMS Power Detector with
57dB Dynamic Range
Features
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}
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}
Description
The LTC^®5582 is a 40MHz to 10GHz RMS responding power
detector. It is capable of accurate power measurement
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 waveforms. 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. Con-
sult factory for more information. The part is packaged in
a 10-lead 3mm × 3mm DFN. It is pin-to-pin compatible
with the LT5570.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
Protected by U.S. Patents including 7262661, 7317357, 7622981.
Typical Application
40MHz to 6GHz RMS Power Detector
1µF
1nF
270pF _68Ω
1nF
V_CC
FLTR
IN⁺
EN
LTC5582
DEC
RT1
IN^–
RT2
GND
OUT
5582 TA01a
3.3V
100nF
ENABLE
V_OUT
Linearity Error vs RF Input Power
2140MHz Modulated Waveforms
3
T_A = 25°C
2
1
0
–1
–2
–3
–65
4-CARRIER WCDMA
CW
3-CARRIER CDMA2K
–55 –45 –35 –25 –15
RF INPUT POWER (dBm)
–5 5
5582 TAO1b
5582f