ADL5380, 400 MHz to 6 GHz Quadrature Demodulator

Analog Devices offers its ADL5380, 400 MHz to 6GHz quadrature demodulator for cellular and microwave point-to-multipoint radio applications

Image of Analog Devices' ADL5380, 400 MHz to 6GHz Quadrature DemodulatorADI's ADL5380 is a broadband quadrature I-Q demodulator that covers an RF / IF input frequency range from 400 MHz to 6 GHz. With a noise figure (NF) = 10.9 dB, input P1dB (IP1dB) = 11.6 dBm, and input IP3 (IIP3) = 29.7 dBm at 900 MHz, the ADL5380 demodulator offers outstanding dynamic range suitable for the demanding infrastructure direct-conversion requirements. The differential RF inputs provide a well-behaved broadband input impedance of 50 Ω and are best driven from a 1:1 balun for optimum performance.

Excellent demodulation accuracy is achieved with amplitude and phase balances of ~0.07 dB and ~0.2°, respectively. The demodulated in-phase (I) and quadrature (Q) differential outputs are fully buffered and provide a voltage conversion gain of ~7 dB. The buffered baseband outputs are capable of driving a 2 Vpp differential signal into 200 Ω.

The fully balanced design minimizes effects from second-order distortion. The leakage from the LO port to the RF port is <-50 dBm. Differential dc offsets at the I and Q outputs are typically <20 mV. Both of these factors contribute to the excellent IIP2 specification, which is >65 dBm.

The ADL5380 operates off a single 4.75 V to 5.25 V supply. The supply current is adjustable by placing an external resistor from the ADJ pin to either the positive supply, VS, (to increase supply current and improve IIP3) or to ground (which decreases supply current at the expense of IIP3).

The ADL5380 is fabricated using the Analog Devices, Inc., advanced silicon-germanium bipolar process and is available in a 24-lead exposed paddle LFCSP.

Features
  • Operating RF and LO frequency: 400 MHz to 6 GHz
  • Input IP3
    • 30 dBm at 900 MHz
    • 28 dBm at 1900 MHz
  • Noise figure (NF)
    • 10.9 dB at 900 MHz
    • 11.7 dB at 1900 MHz
  • Voltage conversion gain: ~7 dB
  • Quadrature demodulation accuracy at 900 MHz
  • Phase accuracy: ~0.2°
  • Amplitude balance: ~0.07 dB
  • Demodulation bandwidth: ~390 MHz
  • Baseband I/Q drive: 2 VP-P into 200 Ω
  • Single 5 V supply
  • Input IP2: >65 dBm at 900 MHz
  • Input P1dB (IP1dB): 11.6 dBm at 900 MHz
Applications
  • Cellular W-CDMA/GSM/LTE
  • Microwave
  • Point to multipoint radios
  • Broadband wireless
  • WiMAX

Evaluation Board

ImageManufacturer Part NumberDescriptionTypeFrequencyFor Use With/Related ProductsAvailable QuantityView Details
EVAL BOARD FOR ADL5380ADL5380-EVALZEVAL BOARD FOR ADL5380Demodulator400MHz ~ 6GHzADL538017 - ImmediateView Details

ADL5380, 400 MHz to 6 GHz Quadrature Demodulator

ImageManufacturer Part NumberDescriptionLO FrequencyRF FrequencyP1dBAvailable QuantityView Details
RF DEMOD IC 400MHZ-6GHZ 24LFCSPADL5380ACPZ-R7RF DEMOD IC 400MHZ-6GHZ 24LFCSP400MHz ~ 6GHz400MHz ~ 6GHz11.6dBm0View Details
Published: 2017-01-19