TRF2443IPFPR datasheet(2/72 Pages) TI

2 / 72 page

TRF2443 DEVICE DESCRIPTION

AGC

CNTL

0/90

TXPLL

RXAGC

VCCs

GNDs

RXPLL

TXQ_IN

TX_OUT

TXI_IN

RX_IN

RX VGA

TX VGA

IFAMP

From SPI

from RXPLL

XPIC_IN

XPIC

OUT

XPIC

AGC

XPIC_BBI

XPIC_BBQ

Level

Detect

IF SAW

IF_OUT

IF_IN

TX_PWD

Temperature

Sensor

CLKSPI

DATASPI

LESPI

RXBBI

RXBBQ

TEMPOUT

0/90

RECEIVER DESCRIPTION

0/ 90

RXVGA

LNA

FromSPI

fromRXPLL

AGC

CNTL

IFVGA1

IFVGA2

IFVGA3

FromSPI

BB AMP/FLT

IFSAW

RX_IN

IF_OUT

IF_IN

RX_BBI

RX _BBQ

RX_AGC

TRF2443

SLWS217A – SEPTEMBER 2009 – REVISED SEPTEMBER 2009 ................................................................................................................................... www.ti.com

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam

during storage or handling to prevent electrostatic damage to the MOS gates.

Figure 1. TRF2443 Functional Block Diagram

Figure 2. Receiver Chain Block Diagram

The TRF2443 features a highly linear low-noise receiver chain with over 60 dB of analog-controlled gain range

and more than 40 dB of gain range programmable via the serial programming interface (SPI) in 1-dB steps.

Moreover, the TRF2443 gives the flexibility to add an external IF filter to further remove unwanted signals. Such

an external filter can be bypassed using an internal path that can be enabled via SPI. The first block of the

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TRF2443IPFPR 数据表(PDF) 2 Page - Texas Instruments

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