MICRF001 Datasheet, PDF (1/8 Pages) Micrel Semiconductor – QwikRadiotm Receiver/Data Demodulator Advance Information

MICRF001
QwikRadio^tm Receiver/Data Demodulator
Advance Information
General Description
The MICRF001 is a single chip OOK (ON-OFF Keyed) Receiver
IC for remote wireless applications, employing Micrel’s latest
QwikRadio^tm technology. This device is a true “antenna-in, data-
out” monolithic device. All RF and IF tuning is accomplished
automatically within the IC, which eliminates manual tuning, and
reduces production costs. Receiver functions are completely
integrated. The result is a highly reliable yet extremely low cost
solution for high volume wireless applications. Because the
MICRF001 is a true single-chip radio receiver, it is extremely
easy to apply, minimizing design and production costs, and
improving time to market.
The MICRF001 uses a novel architecture that allows the
receiver to demodulate signals over a wide RF band, which
eliminates the need for manual tuning. This also significantly
relaxes the frequency accuracy and stability requirements of the
Transmitter, allowing the MICRF001 to be compatible with both
SAW-based and LC-based transmitters. The receiver sensitivity
and selectivity are sufficient to provide low bit error rates for
decode ranges over 100 meters, equaling the performance of
other more expensive solutions.
All tuning and alignment are accomplished on-chip by a low-
cost ceramic resonator or with an externally supplied clock
reference. Initial tolerance requirements on the ceramic
resonator or external clock is a modest ±0.5%. The MICRF001
performance is insensitive to data modulation duty cycle. The
MICRF001 may be used with such coding schemes as
Manchester or 33/66% PWM.
All post-detection (demodulator) data filtering is provided on the
MICRF001, so no external filters need to be designed. Any one
of four filter bandwidths may be selected externally by the user.
Bandwidths range from 0.6kHz to 4.8kHz in binary steps
Features
• Complete UHF receiver on a monolithic chip
• Frequency range 300 to 440 MHz
• Typical range over 100 meters with monopole
antenna
• Data rates to 4.8kbps
• Automatic tuning, no manual adjustment
• No Filters or Inductors required
• Very low RF re-radiation at the antenna
• Direct CMOS logic interface to standard decoder and
microprocessor ICs
• Extremely low external part count
Applications
• Keyless Entry
• Security Systems
• Remote Fan/Light Control
• Garage Door Openers
Typical Operating Circuit
387 MHz, 1200 BAUD OOK RECEIVER
Micrel Inc. • 1849 Fortune Drive San Jose, Ca 95131 • USA • tel + 1 [phone] • fax + 1 [phone] • http://www.micrel.com