T2801 データシートの表示（PDF） - Atmel Corporation

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T2801

DECT Single-Chip Transceiver

Atmel Corporation 

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

DECT

Single-chip

Transceiver

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

MIXER

OUT IF_IN

IF_TANK

DEMOD

TANK

CF

IR MIXER

IF AMP 1

IF AMP 2

RF_IN

RAMP_OUT

RAMP_SET

RAMP

GEN

RSSI

DEMOD

BB FILTER

D/A DEMOD DAC

TX / RX

SWITCH

VCO

GF

BB_OUT

RSSI

TX_DATA

TX_OUT

PC

PD

f

:n

TX DRIVER

PU_VCO

VCO

REG

CP

AUX

REG

MCC 3-WIRE

BUS

RC

f

:n

CTRL

LOGIC

CLOCK

DATA

ENABLE

RX_ON

TX_ON

PU_RX/TX

PU_PLL

T2801

VREG_VCO

VS_VCO

VREG VS_REG VTUNE

GND_VCO PU_REG REG_CTRL

CP

LD

I_CPSW

REF_CLK

Rev. 4567B–DECT–03/06

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