LTC5587
6 GHz RMS Power Detector
with Digital Output
FEATURES DESCRIPTION n The LTC®5587 is a 10MHz to 6GHz, low power monolithic
precision RMS power detector with an integrated 12-bit
serial analog-to-digital converter (ADC). The RMS detector uses a proprietary technique to accurately measure the
RF power of modulated signals with crest-factor as high
as 12dB. For an input frequency of 2.14GHz the detection
range is from –34dBm to 6dBm. The serial digital output
of the detector is a 12-bit word value that is directly proportional to the RF signal power measured in dBm. The
LTC5587 is suitable for precision power measurement
for a wide variety of RF standards, including LTE, WiMAX,
W-CDMA, TD-SCDMA, CDMA, CDMA2000, EDGE, GSM,
etc. The DC output of the detector is connected in series
with an on-chip 300Ω resistor to the analog output pin
(VOUT). This enables further filtering of the output modulation ripple using an off-chip capacitor before analog-todigital conversion. The ADC features include no data latency,
no missing codes, and a sampling rate of up to 500ksps. A
dedicated external reference pin (VREF) can be tied to VDD
or other suitable low-impedance voltage reference to set the
ADC full-scale input voltage range. The ADC also features
an automatic power down after each conversion making
the LTC5587 ideal for low-power applications. n Frequency Range: 10MHz to 6GHz
Accurate Power Measurement of High Crest Factor …