40MHz to 10GHz RMS Detector with 57dB Dynamic Range Provides Accurate RF Power Measurement

News Release ⎜ www.linear.com
40MHz to 10GHz RMS Detector with 57dB Dynamic Range
Provides Accurate RF Power Measurement
MILPITAS, CA – June 16, 2010 – Linear Technology introduces the LTC5582, a high dynamic
range 10GHz RMS detector that sets a new standard in measurement accuracy of RF signals. It
offers outstanding +/-0.2dB linearity over a 43dB dynamic range at 2.14GHz, regardless of the
high crest-factor modulations used in 3G and 4G broadband wireless networks, including LTE,
WiMAX, TD-SCDMA, W-CDMA and CDMA2000. In addition, the LTC5582 can accurately
measure signal levels as low as -56dBm to 1dBm to +/-1dB error, providing 57dB dynamic
range from 450MHz to 2.7GHz. The device is capable of operating at higher frequencies,
providing 46dB of useful dynamic range at 6GHz, and 38dB at 10GHz. Moreover, the device
operates efficiently on a single 3.3V supply. Its RF input is designed to operate
single-ended, requiring no external balun transformer, thus reducing the solution size and cost.
The LTC5582 has outstanding temperature performance. From -40°C to 85°C, the device
can deliver 48dB of dynamic range with a linearity accuracy of +/-1dB. This enables use of the
LTC5582 in rugged environments such as RRUs (Remote Radio Units) or ODU (Outdoor Units)
deployed on cellular towers with minimal calibration adjustments. Moreover, the device has
on-chip provisions for first- and second-order temperature compensation which can be easily
calibrated for improved temperature performance.
The LTC5582 has a log-linear response which precisely converts the RF signal levels in
dB scale into a linearly proportional DC voltage. Operating in the wireless network frequency
range from 450MHz to 2.7GHz, the detector response maintains the industry’s most constant
40MHz to 10GHz RMS Detector with 57dB Dynamic Range
Provides Accurate RF Power Measurement
page 2
slope as the signal frequency changes. This allows a single detector to operate in multiband
environments with minimal calibration adjustments. Moreover, the LTC5582 has fast settling
characteristics, acquiring a rising signal accurately in 500ns and a falling signal in 4.5us. Its fast
response supports a wide range of signal envelope tracking applications.
The LTC5582’s specifications apply to single-ended RF input, supporting single-ended
applications without a need of an external balun transformer. So the RF input provides easy
interface, and is cost-effective to implement in a high performance RF measurement circuit.
The LTC5582 is powered from a single 3.3V supply with an operating current of 42mA,
minimizing power consumption. The device has an Enable pin, allowing the chip to power down.
When in shutdown mode, the device draws trickle current of less than 10uA. The LTC5582
comes in a small 3mm x 3mm 10-pin DFN package. Typical application circuits using the device
require fewer external components, providing a compact solution footprint. The LTC5582 is
available from stock. Pricing starts at $6.25 in 1,000 piece quantities. For more information, visit
www.linear.com/pr/5582.
Photo Caption: 40MHz to 10GHz High Dynamic Range RMS Detector
Summary of Features: LTC5582
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Operating Frequency Range
Log-Linear Dynamic Range (Modulated Signals)
o at 880MHz
o at 2.14GHz
o at 5.8GHz
Accurate RF Measurement Range
Accuracy Over Temperature (-40°C to +85°C)
Accurate Response Over Frequency
Single-Ended RF Input
Fast Settling Time
o Rise
o Fall
Small Package
40MHz to 10GHz
59dB
57dB
49dB
-56dBm to 1dBm
+ 1dB
700MHz to 2.7GHz
No External Transformer
500ns
4.5us
3mm x 3mm DFN
40MHz to 10GHz RMS Detector with 57dB Dynamic Range
Provides Accurate RF Power Measurement
page 3
About Linear Technology
Linear Technology Corporation, a manufacturer of high performance linear integrated circuits,
was founded in 1981, became a public company in 1986 and joined the S&P 500 index of major
public companies in 2000. Linear Technology products include high performance amplifiers,
comparators, voltage references, monolithic filters, linear regulators, DC-DC converters, battery
chargers, data converters, communications interface circuits, RF signal conditioning circuits,
uModule® products, and many other analog functions. Applications for Linear Technology’s
high performance circuits include telecommunications, cellular telephones, networking products
such as optical switches, notebook and desktop computers, computer peripherals,
video/multimedia, industrial instrumentation, security monitoring devices, high-end consumer
products such as digital cameras and MP3 players, complex medical devices, automotive
electronics, factory automation, process control, and military and space systems.
LT, LTC, LTM, uModule and
are registered trademarks of Linear Technology Corp. All other trademarks are the
property of their respective owners.
Press Contacts:
North America / Worldwide
UK & Nordic
John Hamburger, Director Marketing
Communications
[email protected]
Tel 408-432-1900 ext 2419
Alan Timmins
[email protected]
Tel: +44-1-252-629937
Doug Dickinson, Media Relations Manager
[email protected]
408-432-1900 ext 2233
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