PORTLAND, Ore.—A new wireless remote-control
system-on-a-chip enables remote-keyless entry designs to slim down their
bill-of-materials to one external component, compared to dozens
required for traditional solutions, according to Silicon Laboratories
Inc., which announced the EZRadio single-chip radio frequency (RF)
transmitter Wednesday (July 21).
Silicon Labs combined its RF
microcontroller and its all-CMOS
oscillator technologies to enable the EZRadio Si4010 SoC radio
frequency (RF) transmitter to eliminate the need for external components
(except for a single capacitor). The EZRadio chip is designed for
remote-keyless entry applications such as garage door openers, building
automation remotes, secure-entry devices and other remote controls that
require only a one-way RF link.
Silicon Labs claims its Si4010 RF transmitter maintains 150- or 250-
parts per million accuracy in its carrier frequency over commercial
temperature ranges and industrial temperature ranges, respectively. The
8051-based RF microcontroller also auto-tunes a printed-circuit board
(PCB) antenna with on-chip variable capacitors that dynamically match
the antenna's inductance. The chip also supports programmable edge-rate
control for on-off keying, power outputs up to +10 dBm and standby
current consumption as low as 10 nanoAmps.
On-chip peripherals include wake-on-touch general-purpose I/O, 20-bit
EEPROM counter, LED driver, sleep timers, debugger and 128-bit Advanced
Encryption Standard accelerator for securing RF links
Labs EZradio SoC requires only one external component (capacitor at right)
whereas traditional SAW designs require as many as 41
Very nice integration work. I always enjoyed projects like this where you work with a major customer to create a cost effective solution then take it to the general market. It's especially nice to see the pictures.