AT86RF211DAI-R datasheet(13/48 Pages) ATMEL

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AT86RF211DAI-R 数据表(PDF) 13 Page - ATMEL Corporation

部件名	AT86RF211DAI-R

功能描述	FSK Transceiver for ISM Radio Applications

PDF	48 Pages

Scroll/Zoom	100%

制造商	ATMEL [ATMEL Corporation]

网页	http://www.atmel.com

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AT86RF211DAI-R 数据表(HTML) 13 Page - ATMEL Corporation

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AT86RF211

1942C–WIRE–06/02

Figure 13. IF1 Filtering

Figure 14. Schematic Input of IF1 Amplifier

Figure 15. Schematic Output of the Second Mixer

IF2 Filtering and Gain

IF2 filtering achieves a narrow channel selection. In case it is not used, it should be

replaced by a > 1 nF coupling capacitor, thus the IF1 filter is the only part achieving the

channel selection. Available commercial filters with a 35 kHz BW allow data rates up to

19.6 kbps if crystal temperature drifts are very low.

For faster communications and/or wider channelization, this ceramic filter can be

replaced by an LC band-pass filter as proposed hereafter.

IF1IN

(pin 35)

330

Ω

IF1

"or"

C > 100 pF

330

Ω

IF1OUT

(pin 36)

Filter

IF1DEC

20 k

Ω

330

Ω

IF1IN

1600

Ω

IF2OUT

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