Datasheet LT5581 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | 6GHz RMS Power Detector with 40dB Dynamic Range |
| Pages / Page | 18 / 1 — FEATURES. DESCRIPTION. Frequency Range: 10MHz to 6GHz. Accurate Power … |
| File Format / Size | PDF / 640 Kb |
| Document Language | English |
FEATURES. DESCRIPTION. Frequency Range: 10MHz to 6GHz. Accurate Power Measurement of High Crest Factor. (Up to 12dB) Waveforms
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LT5581 6GHz RMS Power Detector with 40dB Dynamic Range
FEATURES DESCRIPTION
n
Frequency Range: 10MHz to 6GHz
The LT®5581 is a 10MHz to 6GHz, low power monolithic n
Accurate Power Measurement of High Crest Factor
precision RMS power detector. The RMS detector uses a
(Up to 12dB) Waveforms
proprietary technique to accurately measure the RF power n
40dB Log Linear Dynamic Range
from –34dBm to +6dBm (at 2.14GHz) of modulated signals n
Exceptional Accuracy Over Temperature
with a crest factor as high as 12dB. It outputs a DC voltage n
Fast Response Time: 1μs Rise, 8μs Fall
in linear scale proportional to an RF input signal power n
Low Power: 1.4mA at 3.3V
in dBm. The LT5581 is suitable for precision power mea- n
Log-Linear DC Output vs Input RF Power in dBm
surement and control for a wide variety of RF standards, n Small 3mm × 2mm 8-Pin DFN Package including GSM/EDGE, CDMA, CDMA2000, W-CDMA, n Single-Ended RF Input TD-SCDMA, UMTS, LTE and WiMAX, etc. The final DC out- put is connected in series with an on-chip 300Ω resistor, which enables further filtering of the output modulation
APPLICATIONS
ripple with just a single off-chip capacitor. n GSM/EDGE, CMDA, CDMA2000, W-CDMA, LTE, L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear WiMAX RF Power Control Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 7342431. n Pico-Cells, Femto-Cells RF Power Control n Wireless Repeaters n CATV/DVB Transmitters n MIMO Wireless Access Points n Portable RMS Power Measurement Instrumentation
TYPICAL APPLICATION 10MHz to 6GHz Infrastructure Power Linearity Error vs RF Input Power, Amplifier Level Control 2140MHz Modulated Waveforms
DIRECTIONAL POWER 3 COUPLER T RF AMP A = 25°C IN RFOUT 2 VCC CMATCH 2.7VDC TO 5.25VDC 1 0.1µF 0.01µF DIGITAL 1 8 50Ω V LMATCH POWER CC CSQ 1000pF 0 CONTROL 2 7 EN RFIN LT5581 –1 CW 3 6 WCDMA, UL ADC V LINEARITY ERROR (dB) OUT GND 68Ω WCDMA DL 1C 4 5 –2 WCDMA DL 4C GND GND GND CFILT LTE DL 1C 0.01µF 9 LTE DL 4C –3 5581 TA01a –35 –30 –25 –20 –15 –10 –5 0 5 10 RF INPUT POWER (dBm) 5581 TA01b 5581fb For more information www.linear.com/LT5581 1 Document Outline Description Typical Application Absolute Maximum Ratings Pin Configuration Typical Performance Characteristics Pin Functions Package Description
FEATURES DESCRIPTION
n
Frequency Range: 10MHz to 6GHz
The LT®5581 is a 10MHz to 6GHz, low power monolithic n
Accurate Power Measurement of High Crest Factor
precision RMS power detector. The RMS detector uses a
(Up to 12dB) Waveforms
proprietary technique to accurately measure the RF power n
40dB Log Linear Dynamic Range
from –34dBm to +6dBm (at 2.14GHz) of modulated signals n
Exceptional Accuracy Over Temperature
with a crest factor as high as 12dB. It outputs a DC voltage n
Fast Response Time: 1μs Rise, 8μs Fall
in linear scale proportional to an RF input signal power n
Low Power: 1.4mA at 3.3V
in dBm. The LT5581 is suitable for precision power mea- n
Log-Linear DC Output vs Input RF Power in dBm
surement and control for a wide variety of RF standards, n Small 3mm × 2mm 8-Pin DFN Package including GSM/EDGE, CDMA, CDMA2000, W-CDMA, n Single-Ended RF Input TD-SCDMA, UMTS, LTE and WiMAX, etc. The final DC out- put is connected in series with an on-chip 300Ω resistor, which enables further filtering of the output modulation
APPLICATIONS
ripple with just a single off-chip capacitor. n GSM/EDGE, CMDA, CDMA2000, W-CDMA, LTE, L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear WiMAX RF Power Control Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 7342431. n Pico-Cells, Femto-Cells RF Power Control n Wireless Repeaters n CATV/DVB Transmitters n MIMO Wireless Access Points n Portable RMS Power Measurement Instrumentation
TYPICAL APPLICATION 10MHz to 6GHz Infrastructure Power Linearity Error vs RF Input Power, Amplifier Level Control 2140MHz Modulated Waveforms
DIRECTIONAL POWER 3 COUPLER T RF AMP A = 25°C IN RFOUT 2 VCC CMATCH 2.7VDC TO 5.25VDC 1 0.1µF 0.01µF DIGITAL 1 8 50Ω V LMATCH POWER CC CSQ 1000pF 0 CONTROL 2 7 EN RFIN LT5581 –1 CW 3 6 WCDMA, UL ADC V LINEARITY ERROR (dB) OUT GND 68Ω WCDMA DL 1C 4 5 –2 WCDMA DL 4C GND GND GND CFILT LTE DL 1C 0.01µF 9 LTE DL 4C –3 5581 TA01a –35 –30 –25 –20 –15 –10 –5 0 5 10 RF INPUT POWER (dBm) 5581 TA01b 5581fb For more information www.linear.com/LT5581 1 Document Outline Description Typical Application Absolute Maximum Ratings Pin Configuration Typical Performance Characteristics Pin Functions Package Description
