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LTC1758-1EMS8 Datasheet

  • LTC1758-1EMS8

  • RF Power Controllers with 250kHz Control Loop Bandwidth and ...

  • 16頁(yè)

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FEATURES
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LTC1758-1/LTC1758-2
RF Power Controllers with
250kHz Control Loop Bandwidth and
40dB Dynamic Range
DESCRIPTIO
The LTC
廬
1758-2 is a dual band RF power controller for
RF power amplifiers operating in the 850MHz to 2GHz
range. The loop bandwidth reduction to 250kHz im-
proves frequency stability when controlling slow turn-on
PAs such as the Philips BGY280, Conexant RM009/
CX77302, Anadigics AWT6102/AWT6107 and the Hitachi
PF08107/PF08123B.
The LTC1758-1 is a single output RF power controller
that is identical in performance to the LTC1758-2 except
that one output (V
PCA
) is provided. The LTC1758-1 can
be used to drive a single RF or dual channel module with
integral multiplexer. This part is available in an 8-pin
MSOP package.
RF power is controlled by driving the RF amplifier power
control pins and sensing the resultant RF output power
via a directional coupler. The RF sense voltage is peak
detected using an on-chip Schottky diode. This detected
voltage is compared to the DAC voltage at the PCTL pin
to control the output power. The RF power amplifier is
protected against high supply current and high power
control pin voltages.
Internal and external offsets are cancelled over tempera-
ture by an autozero control loop, allowing accurate low
power programming. The shutdown feature disables the
part and reduces the supply current to < 1碌A(chǔ).
, LTC and LT are registered trademarks of Linear Technology Corporation.
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Dual Band RF Power Amplifier Control (LTC1758-2)
Internal Schottky Diode Detector with Improved
Dynamic Range vs LTC1757A
Wide Input Frequency Range: 850MHz to 2GHz
Autozero Loop Cancels Offset Errors and
Temperature Dependent Offsets
Wide V
IN
Range: 2.7V to 6V
Allows Direct Connection to Battery
RF Output Power Set by External DAC
250kHz Control Loop Bandwidth
Fast Acquire After Transmit Enable
Internal Frequency Compensation
Rail-to-Rail Power Control Outputs
Power Control Signal Overvoltage Protection
Low Operating Current: 1mA
Very Low Shutdown Current: < 1碌A(chǔ)
Available in 8-Pin MSOP (LTC1758-1)
and 10-Pin MSOP (LTC1758-2) Packages
Pin Compatible with LTC1757A-X
Improved Start Voltage Accuracy
Improved PCTL Input Filtering
APPLICATIO S
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Single and Dual Band GSM/GPRS Cellular Telephones
PCS Devices
Wireless Data Modems
U.S. TDMA Cellular Phones
TYPICAL APPLICATIO
68鈩?/div>
V
IN
33pF
Li-Ion
SHDN
BSEL
LTC1758-2 Dual Band Cellular Telephone Transmitter
LTC1758-2
1
2
3
4
5
V
IN
RF
SHDN
BSEL
GND
V
CC
V
PCA
V
PCB
TXEN
PCTL
10
9
8
7
6
900MHz
TXEN
RF PA
DIRECTIONAL
COUPLER
DIPLEXER
DAC
1.8GHz /1.9GHz
RF PA
U
U
U
50鈩?/div>
1758
TA01
1

LTC1758-1EMS8 產(chǎn)品屬性

  • LTC1758-1/2

  • 50

  • RF/IF 和 RFID

  • RF 電源控制器 IC

  • -

  • 手機(jī)，GSM，GPRS，PCS，無(wú)線調(diào)制解調(diào)器，TDMA

  • 850MHz ~ 2GHz

  • 單輸出

  • 8-TSSOP，8-MSOP（0.118"，3.00mm 寬）

  • 8-MSOP

  • 管件

LTC1758-1EMS8相關(guān)型號(hào)PDF文件下載

  • 型號(hào)
    版本
    描述
    廠商
    下載
  • 英文版
    Dual Micropower Comparator
    LINER
  • 英文版
    DUAL MICROPOWER COMPARATOR
    LINER [Lin...
  • 英文版
    Dual Micropower Comparator
    LINER [Lin...
  • 英文版
    BANG-BANG Controller
    LINER
  • 英文版
    BANG-BANG Controller
    LINER [Lin...
  • 英文版
    Window Comparator
    LINER
  • 英文版
    Window Comparator
    LINER [Lin...
  • 英文版
    Window Comparator
    LINER [Lin...
  • 英文版
    2-Channel Differential Input 16-Bit No Latency DS ADC
    LINER
  • 英文版
    2-Channel Differential Input 24-Bit No Latency DS ADC
    LINER [Lin...
  • 英文版
    2-Channel Differential Input 16-Bit No Latency DS ADC
    LINER [Lin...
  • 英文版
    Dual Precision Intrumentation Switched-Capacitor Building Bl...
    LINER [Lin...
  • 英文版
    Switched Capacitor Voltage Converter
    LINER
  • 英文版
    Switched Capacitor Voltage Converter
    LINER [Lin...
  • 英文版
    Programmable Micropower Hex Translator/ Receiver/Driver
    LINER
  • 英文版
    Programmable Micropower Hex Translator/ Receiver/Driver
    LINER [Lin...
  • 英文版
    “Inductorless” 5V to + 5V Converter
    LINER
  • 英文版
    “Inductorless” 5V to + 5V Converter
    LINER [Lin...
  • 英文版
    Dual Micropower Chopper Stabilized Operational Amplifier wit...
    LINER
  • 英文版
    Dual Micropower Zero-Drift Operational Amplifier with Intern...
    LINER [Lin...

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