6GHz RMS Power Detector with Digital Output Provides Fast, Accurate RF Power Measurements in a Compact Solution

News Release ⎜ www.linear.com
6GHz RMS Power Detector with Digital Output Provides
Fast, Accurate RF Power Measurements in a Compact Solution
MILPITAS, CA – August 16, 2010 – Linear Technology introduces the LTC5587, an industry
first 40dB dynamic range 6GHz RMS detector integrated with a high sampling rate 12-bit serial
A/D converter. The digital output RMS RF detector provides +/-1dB measurement accuracy of
high crest-factor signals, independent of the modulation used. The detector is capable of
operating over a wide frequency range from 10MHz to 6GHz. The integrated 12-bit ADC
captures and digitizes the detector measurement at a rate of up to 500k samples/second and
delivers the data via a bit stream over a serial SPI port. The RF detector operates with
single-ended input and requires no external balun transformer. Its small 3mm x 3mm DFN
package provides a highly compact solution.
The LTC5587’s +/- 1dB accuracy over a 40dB dynamic range and over the full
temperature range from -40°C to 85°C offers best-in-class performance. Combined with a 12-bit
A/D converter, the device provides 0.014dB per bit measurement resolution. Its low power
consumption is ideal for applications in cellular basestations, picocells, and femtocells
supporting all standards including LTE, W-CDMA, TD-SCDMA, CDMA/2k, GSM/EDGE and
WiMAX. Other applications include MIMO radios, repeaters, point-to-point microwave links,
military radios with complex modulation, remote power measurements, and portable test and
measurement instruments. The detector is particularly useful in FPGA-based systems where no
A/D converters are available.
The LTC5587 is powered from a single 3.3V supply. During sampling mode, its total
operating current is 3mA, consuming only 10mW of power. Its consumption is further reduced
by one-half when the ADC is idled, making the LTC5587 suitable for battery powered or
portable remote RF measurement systems. The device also has shutdown capability, drawing less
than 10uA supply current when disabled. The LTC5587 is offered in a small 3mm x 3mm 12-pin
DFN package, providing a compact solution footprint. The LTC5587 is available from stock,
priced starting at $5.17 each in 1,000 piece quantities. For more information, visit
http://www.linear.com/5587.
6GHz RMS Power Detector with Digital Output Provides
Fast, Accurate RF Power Measurements in a Compact Solution
page 2
Photo Caption: 6GHz RMS Power Detector with Digital Output
Summary of Features: LTC5587
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Operating Frequency Range
Log-Linear Dynamic Range (Modulated Signals)
o at 880MHz
o at 2.14GHz
o at 3.5GHz
Accurate RF Measurement Range
Accuracy Over Temperature (-40°C to +85°C)
Integrated 12-Bit ADC
SPI/MICROWIRE Serial I/O
Very Low Power Consumption
Single-Ended RF Input
Fast Acquisition Time
o Rise
o Fall
Small Package
10MHz to 6GHz
40dB
37dB
35dB
-34dBm to 6dBm
+ 1dB
500ksps sampling rate
10mW (3.3V, 3mA)
No External Transformer
2us
8us
3mm x 3mm DFN
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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