独家em9201 qfn24

 description
   the em9201/02 is a low-voltage 2.4ghz transceiver icwith built-in link-layer logic permitting proprietary wireless
links in the 2.400 … 2.4835 ghz ism band. it has a radiocore with a low-if architecture and gfsk modulation scheme being compliant with the emerging bluetooth low energy technology standard.control of the link-layer logic is possible though the spi interface using an external host-controller. an fpga bridge is included in the circuit such that with an external fpga any protocol compatible with the rf characteristics can also be emulated through the spi port of the em9201/02. the em9201/02 can be operated from a single 1.5v battery by making use of the on-chip step-up (boost) dc/dc converter. this converter is designed to support an extra load such as a low-power microcontroller (host) or sensor interface circuit with a dedicated application profile.the em9201/02 can also operate without the dc/dc converter, when supplied from a 3 v battery or any other source such as an external ldo regulator. no external coil is needed then.
em9201: up to 1 mb/s on air data rate
em9202: up to 2 mb/s on air data rate
chip versions, programmable by metal mask option
v1: with dc/dc converter for 1.5v battery
v2: w/o dc/dc converter for any voltages 1.9 – 3.6v
typical application schematic
  features
single cell 1.5v battery operation (alkaline aa, aaa)
· operation down to vbat = 0.8 v (for start-up --> 1.0v)
· 3 v lithium battery as alternative
· bluetooth low energy-compliant gfsk modulation
· low drift of pll frequency by design
· on air data rate: 1mb/s for em9201, configurable 1mb/sor 2mb/s for em9202
 · programmable rf output level:-20 dbm … + 4dbm in 8 steps
· no antenna matching elements needed through
appropriate pcb antenna design :
· 200 differential impedance of antenna port
· low-cost 26mhz xtal
· bld function: battery level detection in accordance with
selected battery
· current consumption (on vcc, vcc =2.1v, 2mb/s )
12.5 ma in rx
11.5 ma in tx (0dbm output power)
3.0 μa in sleep-mode (dc/dc running on rcosc) 1)
0.8 μa in power-down mode (3v version, dc/dc off)
1) external load reduced to < 500μa
· mlf24 4x4 package
applications
· remote sensing in general
· wireless mouse,keyboard etc.
· wireless sensors in watches
· wireless sports equipment
· alarm and security systems