MICRF114 datasheet(11/34 Pages) MICROCHIP

11 / 34 page

 2015 Microchip Technology Inc.

Preliminary

DS50002416A-page 11

MICRF114

3.0

TYPICAL PERFORMANCE

CURVES

3.1

Characterization Setup

The MICRF114 is characterized at the two most

popular frequencies, 315 MHz and 433.92 MHz, over

the whole operating temperature and supply voltage

range. The results shown in Section 3.2 “315 MHz

Results” and Section 3.3 “433 MHz results” are the

average values taken from three devices, each coming

from a typical wafer lot. The RF output of the

MICRF114 is matched to 50 ohms to facilitate

connection to a spectrum analyzer. Refer to Figure 3-1.

FIGURE 3-1:

MATCHING CIRCUIT

SCHEMATIC

Harmonic filtering is omitted. The measured power

levels are calculated back to the RFO pin of the

MICRF114, taking into account the losses of the

characterization setup. Component values that are

valid for the two frequencies are listed in Table 3-1.

Current consumption is measured with a 50% duty-

cycle OOK modulation at 115.2 kbps data rate. Output

power is measured in unmodulated, Continuous Wave

(CW) mode. The reference spur level and the phase

noise are also measured in CW mode at +10 dBm

(nominal) output power setting. The phase noise is

measured at 1 MHz offset from the carrier.

VDD

RFO

TABLE 3-1:

COMPONENT VALUES

Component

Frequency

315 MHz

433 MHz

360 nH

330 nH

39 nH

22 nH

6.8 pF

5.6 pF

9.1 pF

5.6 pF

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