TSA5060ATS datasheet(16/24 Pages) PHILIPS

Part #	TSA5060ATS

Description	1.3 GHz I2C-bus controlled low phase noise frequency synthesizer

PDF	24 Pages

Scroll/Zoom	100%

Manufacturer	PHILIPS [NXP Semiconductors]

Direct Link	http://www.nxp.com

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16 / 24 page

2000 Oct 24

Philips Semiconductors

Product speciﬁcation

1.3 GHz I2C-bus controlled low phase

noise frequency synthesizer

TSA5060A

handbook, full pagewidth

TSA5060A

18 pF

1.2 k

Ω

1.0 nF

4 MHz

TSA5060A

FCE720

Fig.5 Application for using one crystal with two TSA5060As.

I2C-bus crosstalk

The TSA5060A includes a loop amplifier that requires an

external NPN transistor. Care should be taken in the layout

of the application to ground the emitter of the NPN

transistor as close as possible to the ground of the VCO.

The best way to avoid any I2C-bus crosstalk in the

application (i.e. parasitic coupling between the I2C-bus

lines and the VCO coil) is to avoid the I2C-bus signal to

come in the RF part by using an I2C-bus gate that allows

only the messages for the PLL to go to the PLL and to

avoid unnecessary repeated sending. Such a gate is

integrated in most of the Philips digital demodulators.

TSA5060ATS Datasheet(PDF) 16 Page - NXP Semiconductors