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LT5503EFE Datasheet

  • LT5503EFE

  • 1.2GHz to 2.7GHz Direct IQ Modulator and Mixer

  • 212.27KB

  • 20頁

  • LINER

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Final Electrical Specifications
LT5503
1.2GHz to 2.7GHz Direct
IQ Modulator and Mixer
FEATURES
s
s
DESCRIPTIO
October 2001
s
s
s
s
s
Single 1.8V to 5.25V Supply
Direct IQ Modulator with Integrated 90擄 Phase
Shifter*
Four Step RF Power Control
120MHz Modulation Bandwidth
Independent Double-Balanced Mixer
Modulation Accuracy Insensitive to Carrier Input
Power
Modulator I/Q Inputs Internally Biased
The LT
廬
5503 is a front-end transmitter IC designed for low
voltage operation, and is compatible with the LTC family of
WLAN products. The IC contains a high frequency quadra-
ture modulator with a variable gain amplifier (VGA) and a
balanced mixer. The modulator includes a precision 90擄
phase shifter which allows direct modulation of an RF
signal by the baseband I and Q signals.
In a superheterodyne system, the mixer can be used to
generate the high-frequency RF input for the modulator by
mixing the system鈥檚 1st and 2nd local oscillators.
The LT5503 modulator output delivers 鈥?dBm at 2.5GHz.
The VGA allows output power reduction in three steps up
to 13dB with digital control. The baseband inputs are
internally biased for maximum input voltage swing at low
supply voltage. If needed, they can be driven with external
bias voltages.
APPLICATIO S
s
s
s
s
s
IEEE 802.11 DSSS and FHSS
High Speed Wireless LAN (WLAN)
Wireless Local Loop (WLL)
PCS Wireless Data
MMDS
, LTC and LT are registered trademarks of Linear Technology Corporation.
*Patent Pending
TYPICAL APPLICATIO
2.45GHz
BPF
V
CC2
2V
V
CC1
2V
鈥?
V
CC
LO2 V
CC
LO1
MIXER
ENABLE
MODULATOR
ENABLE
LO2IN
(750MHz)
MIXEN
MODEN
LO2
梅2
MX
鈥?/div>
MX
+
MODIN V
CC
RF
V
CC
MOD
V
CC
VGA
OUTPUT POWER (dBm)
BQ
+
BQ
鈥?/div>
0擄
梅1
90擄
MODOUT
VGA
CONTROL
LOGIC
GND
DMODE
LO1
LO1IN (2075MHz)
GC1 GC2
5503 F01
BI
+
BI
鈥?/div>
2.45GHz
MODULATED
RFOUT
Figure 1. 2.45GHz Transmitter Application, Carrier for Modulator Generated by Upmixer
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
U
鈥?
鈥?
鈥?
鈥?
1.8
2.4
U
U
2.45GHz Modulated Output
Power vs Supply Voltage
P
LO1
= 鈥?2dBm
P
LO2
= 鈥?8dBm
BASEBAND = 1V
P-P
T
A
= 27擄C
3.0
3.6
4.2
SUPPLY VOLTAGE (V)
4.8
5.4
5503 TA01b
1

LT5503EFE 產(chǎn)品屬性

  • LT5503

  • 74

  • RF/IF 和 RFID

  • RF 調(diào)制器

  • -

  • 調(diào)制器/混頻器

  • 1.4GHz ~ 2.4GHz

  • 1.7GHz ~ 2.7GHz

  • -15dBm

  • -152dBm/Hz

  • 12.7dBm

  • 38mA

  • 1.8 V ~ 5.25 V

  • 2.4GHz

  • 20-TSSOP（0.173"，4.40mm 寬）裸露焊盤

  • 管件

LT5503EFE相關(guān)型號PDF文件下載

  • 型號
    版本
    描述
    廠商
    下載
  • 英文版
    Seoul Semiconductor [INFRARED LAMP LED]
    SEOUL
  • 英文版
    40MHz to 900MHz Quadrature Demodulator
    LINER
  • 英文版
    1.8GHz to 2.7GHz Receiver Front End
    LINER [Lin...
  • 英文版
    40MHz to 900MHz Quadrature Demodulator
    LINER [Lin...
  • 英文版
    400MHz Quadrature IF Demodulator with RSSI
    LINER
  • 英文版
    400MHz Quadrature IF Demodulator with RSSI
    LINER [Lin...
  • 英文版
    1.2GHz to 2.7GHz Direct IQ Modulator and Mixer
    LINER [Lin...
  • 英文版
    40MHz to 900MHz Quadrature Demodulator
    LINER [Lin...
  • 英文版
    1.2GHz to 2.7GHz Direct IQ Modulator and Mixer
    LINER
  • 英文版
    1.2GHz to 2.7GHz Direct IQ Modulator and Mixer
    LINER [Lin...
  • 英文版
    1.2GHz to 2.7GHz Direct IQ Modulator and Mixer
    LINER [Lin...
  • 英文版
    40MHz to 900MHz Quadrature Demodulator
    LINER [Lin...
  • 英文版
    800MHz to 2.7GHz RF Measuring Receiver
    LINER
  • 英文版
    800MHz to 2.7GHz RF Measuring Receiver
    LINER [Lin...
  • 英文版
    400MHz to 3.7GHz High Signal Level Downconverting Mixer
    LINER [Lin...
  • 英文版
    40MHz to 900MHz Quadrature Demodulator
    LINER [Lin...
  • 英文版
    800MHz to 2.7GHz RF Measuring Receiver
    LINER [Lin...
  • 英文版
    40MHz to 500MHz Quadrature Demodulator with VGA
    LINER
  • 英文版
    40MHz to 900MHz Quadrature Demodulator
    LINER [Lin...
  • 英文版
    40MHz to 500MHz Quadrature Demodulator with VGA
    LINER [Lin...

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