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PDF T2801 Data sheet ( Hoja de datos )
| Número de pieza | T2801 | |
| Descripción | DECT Single-Chip Transceiver | |
| Fabricantes | ATMEL Corporation | |
| Logotipo |  |
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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
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
IR MIXER
IF AMP 1
IF AMP 2
wDwEwM.DOatDaSheet4U.com
TANK
CF
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
PU_VCO
TX DRIVER
VCO
REG
PC
f
:n
AUX
REG
PD
CP
MCC 3-WIRE
BUS
f
:n
RC
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
1 page  
Table 2-1. Pin Description (Continued)
Pin
Symbol
Function
7
VS_PLL
PLL supply voltage
8
VREG
Auxiliary voltage-regulator output
9 REG_CTRL Auxiliary voltage-regulator control output
10
VS_REG
Auxiliary voltage-regulator supply voltage
T2801
VS_PLL
7
VS_REG
10
VS_CP
12
VS_VCO
14
VS_IF
33
VS_MIXER
42
Configuration
GND1
18
GND2
28
GND3
31
GND_VCO
16
GND_CP
11
GND_PLL
43
VS_REG
10
VS_PLL
7
REG_CTRL
9
VREG
8
11
GND_CP
Charge-pump ground
12
VS_CP
Charge-pump supply voltage
13 CP Charge-pump output
4567B–DECT–03/06
GND_PLL
43
VS_CP
12
VS_PLL
7
CP
13
GND_PLL
43
GND_CP
11
5
5 Page 
Table 2-1. Pin Description (Continued)
Pin
Symbol
Function
37 RAMP_SET Slew-rate setting of ramping signal
38
RX_ON
RX control input
39
TX_ON
TX control input
40 MIXER_OUT1 Mixer output to SAW filter
41 MIXER_OUT2 Mixer output to SAW filter
T2801
Configuration
VS_MIXER
42
VS_IF
33
RAMP
SET
37
1k 100
VS_IF
33
GND2
25
RX_ON
TX_ON
38, 39
GND2
28
GND1
18
VS_IF
33
MIXER_
OUT1
40
5k 5k
270 270
VS_MIXER
42
MIXER_
OUT2
41
GND2
28
4567B–DECT–03/06
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet T2801.PDF ] | |
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