The MAX7058 UHF transmitter alternately transmits ASK/OOK data at 315MHz or 390MHz using a single crystal. The MAX7058 has internal tuning capacitors at the output of the power amplifier that can be pro- grammed for matching to the antenna or load. The MAX7058 can transmit at a data rate up to 100kbps NRZ (50kbps Manchester coded). Typical transmitted power into a 50Ω load is +10dBm. The MAX7058 oper- ates from +2.1V to +3.6V and draws under 8.0mA of current. The standby current is less than 1μA at room temperature. A 15MHz crystal is used as the reference for 315MHz and 390MHz operation by selecting synthe- sizer-divide ratios of 21 and 26, respectively. The MAX7058 is available in a 4mm x 4mm, 24-pin thin QFN package and is specified to operate in the -40°C to +125°C automotive temperature range.
The MAX7058 is a crystal‑referenced PLL transmitter that alternately sends ASK/OOK data at 315 MHz or 390 MHz using a single 15 MHz crystal. It is supplied in a 4 mm × 4 mm, 24‑pin thin QFN package and operates from +2.1 V to +3.6 V, drawing less than 8 mA in active mode and under 1 µA in standby.
Typical applications include garage‑door openers, RF remote controls, home automation, wireless sensors, security systems, and automotive devices. Key features are dual‑frequency operation with a single crystal, programmable internal tuning capacitors, ASK/OOK modulation, and adjustable output power up to +10 dBm into a 50 Ω load.
| Frequency range | 300 MHz – 450 MHz (315 MHz/390 MHz operation) |
|---|---|
| Supply voltage | +2.1 V to +3.6 V |
| Standby current | < 1 µA |
| Typical output power | +10 dBm into 50 Ω |
| Maximum data rate | 100 kbps NRZ (50 kbps Manchester coded) |
| Package | 4 mm × 4 mm, 24‑pin thin QFN |
It can transmit at either 315 MHz or 390 MHz.
The device supports data rates up to 100 kbps in NRZ format.
Standby current is less than 1 µA at room temperature.
Typical output power is +10 dBm.