A7125 pdf datasheet (Low power RF Transceiver)

The A7125 is a low cost single chip 2.4GHz transceiver. With on chip fraction-N synthesizer, it can support the application of data rate up to 2Mhz and frequency hopping system. The A7125 also support the packet handling, data FIFO, error forward correction and SPI interface. That make the A7125 can be used together with a low cost and low speed micro-controller. The device is in QFN4X4 20 pin package.
Feature
􀂄 Frequency band: 2400 – 2483Mhz.
􀂄 FSK and GFSK modulation
􀂄 Low current consumption 14 mA for RX
􀂄 Low current consumption 14 mA for TX (output power 1 dBm)
􀂄 On chip regulator
􀂄 Supply voltage 1.9 – 3.6 V
􀂄 On chip low power RC oscillator
􀂄 Low current (< 1uA) in sleep mode and need only one crystal while working together with MCU.
􀂄 High sensitivity (-100dBm at 200KHz data rate & -90dBm at 2MHz data rate)
􀂄 Programmable data rate up to 2Mbps
􀂄 Efficient 3- wire SPI interface to access FIFO data, command and register setting
􀂄 Package handling hardware includes preamble, sync word, FEC, CRC and data whitening.
􀂄 Separate 64 – byte RX and TX FIFOs
􀂄 Easy to use with an low cost MCU
􀂄 Fast settling time synthesizer for frequency hopping system.
􀂄 Digital RSSI output for clear channel indication
􀂄 Digital temperature output
􀂄 Support Frequency compensation scheme to make use the low cost (low accuracy) crystal.