MICRF112-315-EV

MICRF112 300MHz to 450MHz, +10dBm, 1.8V to 3.6V, ASK/FSK Transmitter with Shutdown General Description Features The MICRF112 is a high-performance, easy to use, true “Data-In, RF-Out,” ASK/FSK, phase-locked loop (PLL) based, transmitter IC for applications in the 300MHz to 450MHz frequency range. These applications include remote keyless entry (RKE) and tire pressure monitoring (TPMS). The device needs only a low-cost crystal to precisely set the desired RF frequency, and a few external components for matching the power amplifier output to the antenna. The MICRF112 operates over the 1.8V to 3.6V operating range and delivers +10dBm (CW) output power into a 50Ω load, while consuming 11.5mA of supply current from a 3.0V power supply. In ASK mode, the device consumes 6.9mA of supply current at a data rate of 1kbps (Manchester 50%). It features a low-power shutdown mode in which the device typically consumes 50nA of supply current. This makes it an ideal solution for battery powered applications. • • • • • • • • • • The MICRF112 is rated for the −40°C to +125°C temperature range, and is available in 10-pin MSOP and 10-pin Ultra-Thin DFN packages. For automotive applications, where AEC-Q100 qualification is required, consider the MAQRF112. For ASK-only applications that do not require shutdown, consider the MICRF113 in SOT23-6. Datasheets and support documentation can be found on Micrel’s website at: www.micrel.com. 1.8V to 3.6V supply voltage range Up to +10dBm output power (CW) 6.9mA supply current at 1kbps ASK (50% Manchester) 11.5mA supply current at +10dBm (FSK/CW) 1µA shutdown supply current Data rates up to 50kbps ASK, 10kbps FSK Crystal or ceramic resonators sets RF frequency −40°C to +125°C temperature range 10-pin MSOP (3.0mm x 4.9mm) 10-pin Ultra-Thin DFN (2mm x 2mm x 0.4mm) Applications • • • • • • • • • Remote keyless entry systems (RKE) Remote control (STB, HVAC, and appliances) Garage door openers (GDO) Tire pressure monitor systems (TPMS) Outdoor weather stations Security/Alarm systems Lighting and fan remote controls Doorbells Irrigation control Typical Application QwikRadio is a registered trademark of Micrel, Inc. Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com February 2013 M9999-020713 Micrel, Inc. MICRF112 Ordering Information Part Number Top Mark Temp. Range Package MICRF112YMM RF112YMM –40°C to +125°C 10-Pin MSOP MICRF112YMU 12B –40°C to +125°C 10-Pin UTDFN Pin Configuration 10-Pin Ultra-Thin DFN (MU) (2mm x 2mm x 0.4mm) Top View 10-Pin MSOP (MM) Top View Note: The Pin1 marking symbol could be a circle, triangle, or other symbol. Pin Description Pin Number Pin Name 1 ASK 2 XTLIN 3 XTLOUT 4 VSS 5 XTAL_MOD 6 FSK FSK Data input 7 EN Chip enable, active high 8 VSSPA PA ground 9 PAOUT PA output 10 VDD February 2013 Pin Function ASK Data input Reference oscillator input connection Reference oscillator output connection Ground Reference oscillation modulation port for FSK operation Positive power supply 2 M9999-020713 Micrel, Inc. MICRF112 Absolute Maximum Ratings(1) Operating Ratings(2) Supply Voltage (VDD) ................................................. +4.3V Voltage on PAOUT ...................................................... +7.2V Voltage on I/O Pins ........................ VSS – 0.3 to VDD + 0.3 Lead Temperature (soldering, 10s) .......................... +300°C Storage Temperature (TS) ......................... −65°C to +150°C ESD Rating.................................................................Note 3 Supply Voltage (VDD) ...................................... 1.8V to 3.6V Ambient Operating Temperature (TA) ........ -40°C to +125°C Transmitter Frequency Range ............. 300MHz to 450MHz Electrical Characteristics(4) Specifications apply for VDD = 3.0V, TA = 25°C, FreqREFOSC = 13.560MHz, EN = VDD. 1Kbps data rate, 50% duty cycle. RL 50Ω load (matched) Parameter Condition Min. Typ. Max. Units 1 µA Power Supply Standby Supply Current, Iq EN = VSS 0.05 Mark Supply Current ION @ 315MHz, POUT = +10dBm 11.5 @ 433.92MHz, POUT = +10dBm 11.6 mA @ 315MHz 2.4 mA @ 433.92MHz 2.7 mA 10 dBm 10 dBm SPACE Supply Current, IOFF mA RF Output Section and Modulation Limits: Output Power Level, POUT FSK or ASK "Mark" (4) @ 315MHz (4) @ 433.92MHz (4) 2nd harm. −53 dBc (4) 3rd harm. −53 dBc −51 dBc −65 dBc 80 dBc 22 kHz @ 630MHz Harmonics output for 315MHz @ 945MHz (4) @ 867.84MHz Harmonics Output for 433.92MHz 2nd harm. (4) @ 1301.76MHz 3rd harm. Extinction Ratio for ASK FSK Modulation Frequency Deviation Load capacitor = 10pF, crystal type = HC49/U Data Rate 10 Kbps 50 Kbps ASK Modulation Data Rate (5) @ 315MHz Occupied Bandwidth