MICRF104YM Micrel Inc, MICRF104YM Datasheet
MICRF104YM
Specifications of MICRF104YM
Available stocks
Related parts for MICRF104YM
MICRF104YM Summary of contents
Page 1
MICRF104 General Description The MICRF104 is a low voltage Transmitter IC for remote wireless applications. The device employs Micrel’s latest QwikRadio™ technology. This device is a true “data-in, antenna-out” device. All antenna tuning is accomplished automatically within the IC which ...
Page 2
MICRF104 Pin Configuration Pin Description Pin Number Pin Name 1 VDDPWR VSS REFOSC 6 RFSTBY 7 ANTM 8 ANTP 9 ASK 10 VDDRF MICRF104 VDDPWR ...
Page 3
MICRF104 Absolute Maximum Ratings Supply Voltage .................................. +6V DDPWR DDRF Voltage on I/O Pin EN .................................................. [tbd] Voltage on I/O Pins, RFSTBY, ASK, PC, ANTP, ANTM V –0 +0 Storage Temperature Range ................... ...
Page 4
MICRF104 Parameter Condition Digital / Control Section Calibration time Note 8, ASK=HIGH Power amplifier output hold off Note 9, STDBY transition from LOW to HIGH time from STBY Crystal, ESR < 20 Transmitter Stabilization Time From External Reference (500mVpp) From ...
Page 5
MICRF104 Typical Characteristics Output Power vs PC Pin Voltage -10 -15 -20 -25 -30 -35 0 100 200 300 400 500 600 V (mV) PC November 8, 2001 Mark Current vs PC Pin Voltage ...
Page 6
MICRF104 Functional Diagram VDDPWR EN VSS Reference STBY Bias VDD VDDRF PC Phase Detector (2) REF.OSC Reference Oscillator (1) Functional Description The block diagram illustrates the basic structure of the RF portion of the MICRF104. Identified in the figure are ...
Page 7
MICRF104 a complete UHF transmitter for remote actuation applications such as automotive keyless entry. Included within the differential varactor that serves as the tuning element to insure that the transmit frequency and antenna are aligned with the ...
Page 8
MICRF104 Applications Information Design Process The MICRF104 transmitter design process is as follows: 1). Set the transmit frequency by providing the correct reference oscillator frequency 2). Ensure antenna resonance at the transmit frequency by: a. Either, matching antenna inductance to ...
Page 9
MICRF104 L = 45.1nH The value of the capacitor is calculated as 5.66pF. Supply Bypassing Correct supply bypassing is essential. A 4.7uF capacitor in parallel with a 100pF capacitor is required and an additional 0.1 F capacitor in parallel is ...
Page 10
... TEL This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel Inc. MICRF104 PIN 1 ...