LTC5596
100MHz to 40GHz
Linear-in-dB RMS Power Detector with
35dB Dynamic Range
FeaTures
DescripTion
The LTC®5596isa highaccuracy RMS powerdetectorthat
provides a very wide RF input bandwidth, from 100MHz
up to 40GHz. This makes the device suitable for a wide
range of RF and microwave applications, such as point-
to-point microwave links, instrumentation and power
control applications.
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Ultra Wide Matched Input Frequency Range:
100MHz to 40GHz
35dB Linear Dynamic Range (< 1dB ꢀrrorꢁ
29mV/dB Logarithmic Slope
1dB Flat Response ꢂrom 200MHz to 30GHz
Accurate RMS Power Measurement oꢂ High Crest
Factors (Up to 12dBꢁ Modulated Waveꢂorms
Low Power Shutdown Mode
Low Supply Current: 30mA at 3.3V (Typical)
Small 2mm × 2mm Plastic DFN8 Package
I-Grade: –40°C to 105°C Rated
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The DC output voltage of the detector is an accurate rep-
resentation of the average signal power applied to the RF
input.Theresponseislinear-in-dBwith29mV/dBlogarith-
mic slope over a 35dB dynamic range with typically better
than 1dB accuracy. The detector is particularly suited for
measurement of waveforms with crest factor (CF) as high
as12dB, andwaveformsthatexhibitasignificantvariation
of the crest factor during the measurement.
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H-Grade: –40°C to 125°C Rated
with Guaranteed Log-Slope and Log-Intercept
ESD Rating: 3500V HBM, 1500V CDM
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To achieve higher accuracy and lower output ripple, the
averaging bandwidth can be externally adjusted by a ca-
pacitor connected between the FLTR and OUT pins.
applicaTions
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Point-to-Point Microwave Links
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Instrumentation and Measurement Equipment
The enable interface switches the device between active
measurement mode and a low power shutdown mode.
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 9330283 B2.
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Military Radios
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LTE, WiFi, WiMax Wireless Networks
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RMS Power Measurement
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Receive and Transmit Gain Control
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RF PA Transmit Power Control
Typical applicaTion
100MHz to 40GHz RMS Power Detector
Output Voltage vs Frequency
1.4
1Ω
0dBm
3.3V
–5dBm
1.2
–10dBm
100nF
–15dBm
ENABLE
1.0
EN
V
–20dBm
CC
LTC5596
–25dBm
GND
OUT
ADC
–30dBm
0.8
0.6
0.4
0.2
0
CFLTR
–35dBm
RF
IN
RF
IN
FLTR
GND
GND
5596 TA01a
0.1
1
10
100
RF FREQUENCY (GHz)
5596 TA01b
5596f
1
For more information www.linear.com/LTC5596