The MAX2900-MAX2904 are complete single-chip 200mW transmitters designed for use in the 868MHz/915MHz frequency bands. The MAX2900/MAX2901/MAX2902 are compliant with the FCC CFR47 part 15.247 902MHz to 928MHz ISM-band specifications. The MAX2903/MAX2904 are compliant with the ETSI EN330-220 specification for the European 868MHz ISM band. These transmitter ICs offer a high level of integration while minimizing the number of external components. This is achieved by full integration of the transmit modulator, power amplifier, RF VCO, 8-channel frequency synthesizer, and baseband PN sequence lowpass filter. By filtering the BPSK modulation, the spurious emissions are reduced, enabling up to eight independent transmit channels in the U.S. ISM band. Inputs are provided for spread-spectrum BPSK, ASK, and OOK. FM can be achieved by directly modulating the VCO. The devices are intended primarily for use with an external differential antenna.
The MAX2900‑MAX2904 family are 200 mW single‑chip transmitter ICs for the 868 MHz/915 MHz ISM bands. They integrate a transmit modulator, power amplifier, RF VCO, an 8‑channel frequency synthesizer and a baseband PN‑sequence low‑pass filter, supporting BPSK, OOK, ASK and FM modulations.
The devices are offered in versions for the U.S. 902‑928 MHz band and the European 868 MHz band, with supply voltages from 2.7 V to 4.5 V, operating temperature from –40 °C to +85 °C, and are supplied in a 28‑pin QFN‑EP package (5 mm × 5 mm).
| Output Power (max) | +23 dBm at 4.5 V |
|---|---|
| Output Power (min) | +20 dBm at 3.0 V |
| Frequency Range (U.S.) | 902 MHz to 928 MHz |
| Frequency Range (EU) | 867 MHz to 870 MHz |
| Operating Temperature | –40 °C to +85 °C |
| Package | 28‑Pin QFN‑EP, 5 mm × 5 mm |
| Modulation Types | BPSK, OOK, ASK, FM |
The devices can deliver up to +23 dBm output power when powered at 4.5 V.
They support BPSK, OOK, ASK, and FM modulation.
They are offered in a 28‑pin QFN‑EP package measuring 5 mm × 5 mm.