ADL5386 50 MHz TO 2200 MHz Quadrature Modulator with Integrated Detector and VVA

The ADL5386 is a quadrature modulator with unmatched integration levels for low intermediate frequency (IF) and radio frequency (RF) transmitters within broadband wireless access systems, microwave radio links, cable modem termination systems, and cellular infrastructure equipment. The ADL5386 operates over a frequency range of 50 MHz to 2200 MHz. Its excellent phase accuracy and amplitude balance supports high data rate, complex modulation for next-generation communication infrastructure equipment.

In addition, the ADL5386 incorporates a standalone logarithmic power detector, as well as a voltage variable attenuator (VVA). The attenuator has its own separate input and output pins for easy cascading with filters and buffer amplifiers. The wide dynamic range of the power detector and VVA provides flexibility in the choice of the signal monitoring point in the transmitter system.

The wide baseband input bandwidth of 700 MHz allows for either baseband drive or a drive from a complex IF signal. Typical applications are in IF or direct-to-RF radio-link transmitters, cable modem termination systems, broadband wireless access systems, and cellular infrastructure equipment.

The ADL5386 takes signals from two differential baseband inputs and modulates them onto two carriers in quadrature with each other. The two internal carriers are derived from a single-ended, external local oscillator (LO) input signal at twice the frequency as the desired output. The output amplifier is designed to drive a 50 Ω load.

The ADL5386 consists of two die, one fabricated using the Analog Devices, Inc., advanced SiGe bipolar process, and the other using an external GaAs process. The ADL5386 is packaged in a 40-lead, Pb-free LFCSP_VQ with an exposed paddle. Performance is specified over the −40°C to +85°C range. A Pb-free evaluation board is also available.

Applications

Radio-link infrastructures
Cable modem termination systems
Wireless/cellular infrastructure systems
Wireless local loops
WiMAX/broadband wireless access systems

Features and Benefits

Output frequency range: 50 MHz to 2200 MHz
1 dB output compression: 11 dBm @ 350 MHz
Noise floor: −160 dBm/Hz @ 350 MHz
Sideband suppression: −46 dBc @ 350 MHz

Carrier feedthrough: −38 dBm @ 350 MHz
30 dB of linear AGC dynamic range @ 350 MHz
Single supply: 4.75 V to 5.5 V
40-lead, Pb-free LFCSP_VQ with exposed paddle

RF & Microwave

I/Q Modulators

Data Sheets

Document	note
ADL5386: 50-2200 MHz Quadrature Modulator w/ Integrated Detector & VVA Data Sheet (Rev. 0)	PDF 191 kB

Application Notes

Document	note
AN-1237: Precise Control of I/Q Modulator Output Power Using the ADL5386 Quadrature Modulator and the AD5621 12-Bit DAC (Rev. A)	PDF 127 kB