TRF2432 datasheet(10/23 Pages) TI

Part #	TRF2432

Description	Dual-Band IQ/IF TRANSCEIVER WITH DUAL VCO SYNTHESIZERS

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Manufacturer	TI [Texas Instruments]

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MODES OF OPERATION

Power Modes

Active Mode

−Tx or RX on depending on

TR setting

−VCOs on

−PA on if PAEN=HIGH and

TR=HIGH

− Can calibrate Rx DC I&Q offset

if TR=LOW

Idle Mode

Standby Mode +

− RF/IF VCOs on

Standby Mode

− Crystal oscilator on

− REFOUT buffer on at

crystal frequency only.

− All registers active

− SERIAL port is active.

PE=

Serial CMD

Power Off

Vcc=0V

Sleep Mode

& PE=LOW

Serial CMD

Power On

TRF2432

SLWS177A – APRIL 2005 – REVISED DECEMBER 2005

Table 3. Serial Register Definitions (continued)

NAME

SYMBOL

# OF

DEFAULTS(1)

DESCRIPTION

BITS

Fractional N IF synthesizer

FN_IF

1

0

FN_IF =1 enables the fractional N IF synthesizer when in

idle or active mode. FN = 0 sets the IF synthesizer to a

fixed frequency (374 MHz with 44 MHz crystal) for low

power consumption.

TX output buffer high power

TX_HP

1

0

TX_HP = 1 puts IF amplifier in high linearity mode. TX_HP

= 0 puts the IF amplifier into normal linearity mode to save

current. This does not change linearity of the RFFE.

Figure 2. Power Modes

10

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