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PDF T7024 Data sheet ( Hoja de datos )
| Número de pieza | T7024 | |
| Descripción | ISM 2.4-GHz Front- End IC | |
| Fabricantes | ATMEL Corporation | |
| Logotipo |  |
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Features
• Single 3-V Supply Voltage
• High Power-added Efficient Power Amplifier (Pout Typically 23 dBm)
• Ramp-controlled Output Power
• Low-noise Preamplifier (NF Typically 2.1 dB)
• Biasing for External PIN Diode T/R Switch
• Current-saving Standby Mode
• Few External Components
• Packages:
– PSSO20
– QFN20 with Extended Performance
Electrostatic sensitive device.
Observe precautions for handling.
Bluetooth™/ISM
2.4-GHz Front-
End IC
T7024
Description
The T7024 is a monolithic SiGe transmit/receive front-end IC with power amplifier,
low-noise amplifier and T/R switch driver. It is especially designed for operation in
TDMA systems like Bluetooth™ and WDCT.
Due to the ramp-control feature and a very low quiescewwnwt.DactauShrereet4Un.cto,man external switch
transistor for VS is not required.
Figure 1. Block Diagram
RX_ON PU VS_LNA
TX/RX/
standby
Control
TX
RX
SWITCH_OUT
R_SWITCH
LNA_OUT
RAMP
LNA
LNA_IN
V1_PA
V2_PA
PA_IN
V3_PA_OUT
PA
4533D–BLURF–01/04
1 page  
T7024
Electrical Characteristics (Continued)
Test conditions (unless otherwise specified): VS = 3.0 V, Tamb = 25°C
Parameters
Test Conditions
Symbol
Min.
Typ.
Max.
Unit
Supply current
(LNA and control logic)
TX (control logic active)
Pin VS_LNA
IS
0.5 mA
Standby current
Frequency range
Standby, Pin VS_LNA
RX
IS_standby
1 10 µA
f 2.4
2.5 GHz
Power gain(5)
RX, Pin LNA_IN to LNA_OUT
Gp 15 16 19 dB
Noise figure
RX, PSSO20
RX QFN20
NF 2.5 2.8 dB
NF 2.1 2.3 dB
Gain compression
3rd-order input interception point
Input matching(4)
Output matching(4)
Logic Input Levels (RX_ON, PU)(5)
RX, referred to Pin LNA_OUT
RX
RX, Pin LNA_IN
RX Pin LNA_OUT
O1dB -9 -7 -6 dBm
IIP3 -16 -14 -13 dBm
VSWRin
2:1
VSWRout
2:1
High input level
= ‘1’ Pins RX_ON and PU
ViH 2.4
VS, LNA
V
Low input level
= ‘0’
ViL 0
0.5 V
High input current
= ‘1’ ViH = 2.4 V
IiH 40 60 µA
Low input current
= ‘0’
IiL 0.2 µA
Notes:
1. Power amplifier shall be unconditionally stable, maximum duty cycle 100%, true CW operation, maximum load mismatch
and duration: load VSWR = 10:1 (all phases) 10 s, ZG = 50 Ω.
2. With external matching network, load impedance 50 Ω.
3. Low-noise amplifier shall be unconditionally stable.
4. With external matching components.
5. LNA gain can be adjusted with RX_ON voltage according to Figure 19 on page 11. Please note, that for RX_ON below
1.4 V the T/R switch driver switches to TX mode.
Control Logic for LNA and T/R Switch Driver
Operation Mode
PU
Standby
0
TX 1
RX 1
RX_ON
0
0
1
4533D–BLURF–01/04
5
5 Page 
T7024
Figure 19. (PSSO20, QFN20): LNA Gain (dB) versus RX_ON (V)
20.0
15.0
10.0
5.0
0.0
-5.0
-10.0
-15.0
-20.0
-25.0
1.0
VS = 3 V
1.5 2.0
2.5
RX_ON (V)
3.0
Input/Output Circuits
Figure 20. Input Circuit PA_IN/V1_PA
V1_PA
PA_IN
GND
Figure 21. Input Circuit RAMP/V1_PA
V1_PA
RAMP
4533D–BLURF–01/04
11
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet T7024.PDF ] | |
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