Microsemi introduced the ZL70250 ultra low power radio frequency transceiver. The ZL70250 ULP RF operates in unlicensed frequency bands between 795 and 965 megahertz (MHz) and has a data rate of 186 kilobits per second (kbps) to support a wide variety of sensor applications. All components are integrated into a single chip scale package (CSP) with the exception of a bias resistor and a supply decoupling capacitor. The radio chip is ideal for short-range wireless applications where power consumption is very importance.
The radio has a die size of 2mm x 3mm. It can be integrated together with other compact integrated circuits in multi-chip modules (MCM).
The Microsemi ZL70250 ULP RF transceiver features a low peak current and voltage supply (1.1V to 1.9V). The ultra low power capabilities of the ZL70250 radio differentiate in sensor applications where battery life must be preserved while monitoring real time continuous data events. Current lab trials at Microsemi using CR-2032 coin cells show a significant improvement to battery life in continuous patient monitoring applications such as wireless ECG and pulse oximetry when compared to existing off the shelf solutions using AA batteries.
Microsemi ZL70250 CSP Radio Features
- Tx and Rx current: <2 mA
- Standby current: <500 nA
- Supply: 1.2 V to 1.8 V typical
- IC range: 795-965 MHz
- North American band: 902-928 MHz
- European bands: 863-870 MHz
- Bit rate: up to 186 kbits/s (raw)
- Tx power: up to 0 dBm
- Rx sensitivity: -90 dBm at full rate
- Very few external components — only crystal and bias resistor
- Standard interfaces
- SPI data port
- 2-wire control port
- Digital RSSI and blocker indicator
- Clear channel assessment
- Sniff with automatic receive or standby
- Automatic clear-to-send, turn-around and standby
- Receiver AGC
- Preample and sync
More info: Microsemi ZL70250 Ultra-Low-Power Sub-GHz RF Transceiver (pdf)