micrf102 Micrel Semiconductor, micrf102 Datasheet
micrf102
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micrf102 Summary of contents
Page 1
... General Description The MICRF102 is a single chip Transmitter IC for remote wireless applications. The device employs Micrel’s latest Qwi- kRadio™ technology. This device is a true “data-in, antenna- out” monolithic device. All antenna tuning is accomplished automatically within the IC which eliminates manual tuning, and reduces production costs ...
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... VDD 3 VSS 4 REFOSC 5 STBY 6 ANTN 7 ANTP 8 ASK MICRF102 PC 1 VDD 2 VSS 3 REFOSC 4 8-Pin SOIC (M) Pin Function PC Power Control Input. The voltage at this pin should be set between 0.15V to 0.35V for normal operation. Positive power supply input for the IC. This pin requires a large capacitor for ripple decoupling. A 4.7µ ...
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... Output power specifi ed into a 50Ω equivalent load using the test circuit in Figure 2. Note 6. The MICRF102 was tested to be compliant to part 15.231 for maximum allowable TX power. The transmitted power is measured 3 meters Note 7. from the antenna using transmitter board TX102-2A in Figure 1. Measurement results are summarized in Table 1. ...
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... Table 1. Transmitted Power Measurement with Transmitted Frequency 433.92MHz, FCC Limits and Compliance MICRF102 = input high voltage , input low voltage +5VSW R1 R3 100k 100k C1 R2 0.1µF 6.8k 16V MICRF102 PC ASK VDD ANTP C4 C5 VSS ANTN 100pF 4.7µF 50V 6.3V REFOSC STBY +5VSW C6 (np) 4.7µ ...
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... Figure 3. RF Out CAL Time Example from Standby ASK pin, 1ms period Field Standby Pin 5 Mark Current vs. PC Pin Voltage 100 200 300 400 500 600 V (mV) PC cycle (15ms ASK Pin, 1ms Period Field MICRF102 ...
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... Oscillator (1) Functional Description The block diagram illustrates the basic structure of the MICRF102. Identifi the fi gure are the principal functional blocks of the IC, namely the ( UHF Synthesizer, (6a/b) Buffer, (7) Antenna tuner, (8) Power amplifi er, (9) TX bias control, (10) Reference bias and, (11) Process tuner. ...
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... Automatic Antenna Tuning The output stage of the MICRF102 consists of a variable capacitor (varactor) with a nominal value of 5.0pF tunable over a range of 3pF to 7pF. The MICRF102 monitors the are very close and P phase of the signal on the output of the power amplifi er and automatically tunes the resonant circuit by setting the varactor value at the correct capacitance to achieve resonance ...
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... Good antenna design will yield transmit power in the range of 67dBµV/m to 80dBµV meters. The PC pin on the MICRF102 is used to set the transmit power. The differential voltage on the output of the PA (power amplifi er) is proportional to the voltage at the PC pin. ...
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... Example to Calculate C Calculation Length_mils = 2815 dmils = 0.85 Length Length 71.501 L L Where Length and d are in mm and Where constant dependent on PCB material, copper thickness, etc. MICRF102 Series Capacitor Calculation 315 × × 60.0 VAR C P phi direction C C 120 ...
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... C SERIES 1 1 − − × SERIES - × 433.92 ¥ × π π × × − × 587 MICRF102 10 December 2006 ...
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... Package Information December 2006 8-Pin SOIC (M) 11 MICRF102 ...
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... A Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is at Purchaser’s own risk and Purchaser agrees to fully indemnify MICRF102 + 1 (408) 474-1000 ...