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)