CC1010-RTR1 datasheet(84/152 Pages) TI

84 / 152 page

CC1010

SWRS047

Page 84 of 152

low-noise amplifier (LNA) and converted

down to the intermediate frequency (IF) by

the mixer (MIXER). In the intermediate

frequency stage (IF STAGE) this down-

converted signal is amplified and filtered

before being fed to the demodulator

(DEMOD). As an option a RSSI signal or

the IF signal after the mixer is available at

the AD2(RSSI/IF) pin. After demodu-

lation the digital data is sent to the RFBUF

each bit or byte received (EXIF.RFIF).

In transmit mode the voltage controlled

oscillator (VCO) output signal is fed

directly to the power amplifier (PA). The

RF output is frequency shift keyed (FSK)

by the digital bit stream fed to the RFBUF

each bit or byte to be transmitted

(EXIF.RFIF). The internal T/R switch

circuitry makes the antenna interface and

matching very easy using a few passive

components.

The frequency synthesiser generates the

local oscillator signal which is fed to the

MIXER in receive mode and to the PA in

transmit mode. The frequency synthesiser

consists of a crystal oscillator (XOSC),

phase

detector

(PD),

charge

pump

(CHARGE PUMP), internal loop filter

(LPF), VCO, and frequency dividers (/R

and /N). An external crystal must be

connected to the XOSC. Only one external

inductor is required for the VCO.

A detailed pin description is given at page

15.

CC1010-RTR1 Scheda tecnica(PDF) 84 Page - Texas Instruments