Technical Data

Antenna

External whip or 50 Ω antenna mountable

Frequency

STM 300: 868.300MHz (ASK)1)

STM 300U:902.875MHz (FSK) 1)

Data rate

125 kbps

Receiver Sensitivity (at 25°C)

only via API

typ. –96 dBm2) (868.300 MHz)

typ. -98 dBm2) (902.875 MHz)

Conducted Output Power @50Ω

STM 300: 3 dBm

STM 300U: 1 dBm

Power Supply

2.1 V–4.5 V, 2.6 V needed for startup

Current Consumption

Deep Sleep Mode: 0.2 μA

Rx mode (API only): 33 mA / Tx mode: 24 mA

Dimensions of PCB

22x19x3 mm

Input Channels

4x digital input, 2x WAKE input , 3x analog input Resolution: 3x 8 bit or 1x 10 bit, 1x 8 bit, 1x 6 bit

Operating temperature

–25 up to +85°C

Radio Regulations

STM 300 (max. radiated power +1.4 dBm with whip): RED (EU)

STM 300U: FCC (US) / ISED (CA)