T2801-PLQ datasheet(1/31 Pages) ATMEL

Part #	T2801-PLQ

Description	DECT Single-Chip Transceiver

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Manufacturer	ATMEL [ATMEL Corporation]

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Features

• Supply Voltage Range 3V to 4.6V (Unregulated)

• Auxiliary Voltage Regulator On-chip

• Low Current Consumption

• Few Low Cost External Components

• No Mechanical Tuning Required

• Non-blindslot and Blindslot Operation

• Unlimited Multislot Operation with Advanced Closed-loop Modulation

• Supports Multiple Reference Clocks (10.368 MHz/13.824 MHz/20.736 MHz)

• TX Preamplifier with 0 dBm Output Power at 1.9 GHz and Ramp-signal Generator for

SiGe Power Amplifier

1.

Description

The T2801 is an RF IC for low-power DECT applications. The QFN48 packaged IC is

a complete transceiver including image rejection mixer, IF amplifier, FM demodulator,

baseband filter, RSSI, TX preamplifier, power-ramping generator for power amplifiers,

integrated synthesizer, fully integrated VCO, TX filter and modulation compensation

circuit for advanced closed-loop modulation concept. No mechanical tuning is neces-

sary in production.

Figure 1-1.

Block Diagram

TANK

PC

RC

GF

MCC

CP

VCO

f

: n

f

: n

CTRL

LOGIC

PD

TX / RX

SWITCH

IR MIXER

IF AMP 1

IF AMP 2

DEMOD

BB FILTER

3-WIRE

BUS

DEMOD DAC

RSSI

TX DRIVER

CLOCK

DATA

ENABLE

RX_ON

TX_ON

PU_RX/TX

PU_PLL

TX_DATA

RSSI

BB_OUT

CF

DEMOD

IF_TANK

IF_IN

MIXER

OUT

RF_IN

TX_OUT

VS_VCO

CP

LD

REF_CLK

VTUNE

VREG

VS_REG

REG_CTRL

VREG_VCO

VCO

REG

RAMP

GEN

RAMP_OUT

RAMP_SET

AUX

REG

PU_VCO

PU_REG

GND_VCO

D/A

I_CPSW

DECT

Single-chip

Transceiver

T2801

Rev. 4567B–DECT–03/06

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