The TRF3040 modulator/synthesizer is a device with multiple features, including internal compensation, low phase noise, programmable main and auxiliary dividers, and a serial data interface.
The TRF3040 is an integrated transmit modulator/synthesizer circuit suitable for 900‑MHz analog and digital cellular phones. It combines a TXIF synthesizer, single‑sideband suppressed‑carrier converter, direct‑conversion I/Q modulator, VGA with PA driver, main and auxiliary fractional‑N synthesizers, crystal reference and clock buffers, all in a 48‑pin LQFP package.
The device operates from a 3.6‑3.9 V supply, delivers up to 9 dBm output power, and includes programmable charge‑pump currents and VGA gain settings. Detailed electrical characteristics, pin assignments, absolute‑maximum ratings, and mechanical dimensions are provided for board‑level design.
| Sleep mode supply current | 2 mA min – 3 mA typ |
|---|---|
| Standby mode supply current | 22 mA |
| Full‑power analog mode supply current | 142 mA |
| Full‑power digital mode supply current | 158 mA |
| VGA output power range | -41 dBm to 9 dBm |
| TXLO input frequency range | 900 MHz – 1100 MHz |
| TXLO input power (single‑ended) | -13 dBm to -10 dBm |