MICRF007

Features:

• Complete UHF receiver on a monolithic chip
• 300MHz
• Data Rates up to 2.1kbps
• Automatic tuning, no manual adjustment
• Low Power Consumption
315MHz:
1.7 mA fully operational
0.5A shutdown
170A polled
433.92MHz:
3.0mA fully operational
0.5A shutdown
300A in 10:1 polled operation
• Very low RF re-radiation at the antenna
• CMOS logic interface to standard decoder and microprocessor ICs
• Extremely low external part count
• No filters or inductors required




Application

• Automotive Remote Keyless Entry (RKE)
• Long Range RF Identification
• Remote fan and light control
• Garage door and gate openers




Pinout






Specifications

Supply Voltage (V_DDRF, V_DDBB) ...........................................+7V
Input/Output Voltage (V_I/O) .................... V_SS0.3 to V_DD+0.3
Junction Temperature (T_J) .......................................... +150°C
Storage Temperature Range (T_S) ............. 65°C to +150°C
Lead Temperature (soldering, 10 sec.) ...................... +260°C
ESD Rating......................................................................Note 3




Description

The MICRF007 is a single chip ASK/OOK (ON-OFF Keyed) Receiver IC for remote wireless applications, employing Micrel's latest QwikRadiotm technology. This device is a true "antenna-in to data-out" monolithic device. All RF and IF tuning is accomplished automatically within the IC which eliminates manual tuning, and reduces production costs. The result is a highly reliable yet extremely low cost solution. The MICRF007 is an enhanced version of the MICRF002 and MICRF011.

The MICRF007 is a conventional superhetrodyne receiver, with an (internal) Local oscillator fixed at a single frequency based on an external reference crystal or clock. As with any conventional superhetrodyne reciever, the transmit frequency must be accurately controlled, generally with a crystal or SAW (Surface Acoustic Wave) resonator.

The MICRF007 provides two feature enhancements over the MICRF001/011, (1) a Shutdown Mode, which may be used for duty-cycle operation. (2) Reduced current consumption. The MICRF007 requires a mere 1.7mA at 315MHz (3.0mA at 433.92MHz).These features make the MICRF007 ideal for low and ultra-low power applications, such as RKE and RFID.

All post-detection (demodulator) data filtering is provided on the MICRF007, so no external baseband filters are required. The demodulator filter bandwidth is set to 2.1kHz. Data rates up to 2kbps may be used