The AD8349 is a silicon, monolithic, RF quadrature modulator that is designed for use from 700 MHz to 2700 MHz. It has excellent phase accuracy and amplitude balance.
The AD8349 is a monolithic RF quadrature modulator designed for operation from 700 MHz to 2700 MHz. It provides excellent phase accuracy (0.3° at 2140 MHz) and amplitude balance (0.1 dB), making it suitable for direct‑to‑RF modulation in communication systems such as GSM, CDMA, WCDMA and broadband wireless transmitters.
The device operates from a single 4.75 V‑5.5 V supply, features an output enable pin that can switch the RF output on or off within 50 ns, and includes a pin‑compatible package with AD8345/AD8346. Detailed specifications, absolute maximum ratings, pin functions, and typical performance graphs are provided throughout the sheet.
| Output frequency range | 700 MHz to 2700 MHz |
|---|---|
| Modulation bandwidth | DC to 160 MHz |
| 1 dB output compression | 5.6 dBm @ 2140 MHz |
| Output disable function | output below –50 dBm in < 50 ns |
| Noise floor | –156 dBm/Hz |
| Phase quadrature error | 0.3° @ 2140 MHz |
| Amplitude balance | 0.1 dB |
| Supply voltage | 4.75 V to 5.5 V |
The AD8349 operates from 700 MHz up to 2700 MHz.
It runs from a single supply of 4.75 V to 5.5 V.
The output can be turned off in less than 50 ns using the ENOP pin.
The phase error is 0.3 degrees at 2140 MHz.