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參數(shù)資料
| 型號(hào)： | LTC1757A-2EMS |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 通信及網(wǎng)絡(luò) |
| 英文描述： | Single/Dual Band RF Power Controllers |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PDSO10 |
| 封裝： | PLASTIC, MSOP-10 |
| 文件頁數(shù)： | 1/12頁 |
| 文件大小： | 170K |
| 代理商： | LTC1757A-2EMS |
1
LTC1757A-1/LTC1757A-2
Single/Dual Band
RF Power Controllers
April 2000
The LTC
1757A-2 is a dual band RF power controller for
RF power amplifiers operating in the 850MHz to 2GHz
range. The LTC1757A is pin compatible with the LTC1757
but has improved RF detection range. The input voltage
range is optimized for operation from a single lithium-ion
cell or 3
×
NiMH. Several functions required for RF power
control and protection are integrated in one small 10-pin
MSOP package, thereby minimizing PCB area.
The LTC1757A-1 is a single output RF power controller
that is identical in performance to the LTC1757A-2 except
that one output (V
PCA
) is provided. The LTC1757A-1 can
be used to drive a single RF channel 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 voltage and 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
μ
A.
I
Dual Band RF Power Amplifier Control (LTC1757A-2)
I
Improved Internal Schottky Diode Detector
I
Wide Input Frequency Range: 850MHz to 2GHz
I
Autozero Cancels Initial Offsets and Temperature
Dependent Offset Errors
I
Wide V
IN
Range of 2.7V to 6V Allows
Direct Connection to Battery
I
RF Output Power Set by External DAC
I
Fast Acquire After Transmit Enable
I
Internal Frequency Compensation
I
Rail-to-Rail Power Control Outputs
I
RF PA Supply Current Limiting
I
Battery Overvoltage Protection
I
Power Control Signal Overvoltage Protection
I
Low Operating Current: 1mA
I
Very Low Shutdown Current: <1
μ
A
I
Available in a 8-Pin MSOP Package (LTC1757A-1)
and 10-Pin MSOP (LTC1757A-2)
, LTC and LT are registered trademarks of Linear Technology Corporation.
V
IN
RF
SHDN
BSEL
GND
10
9
8
7
6
1
2
3
4
5
V
CC
V
PCA
V
PCB
TXEN
PCTL
LTC1757A-2
V
IN
Li-Ion
SHDN
BSEL
TXEN
900MHz
DAC
RF PA
DIRECTIONAL
COUPLER
DIPLEXER
1.8GHz/1.9GHz
RF PA
50
1757A TA01
33pF
68
LTC1757A-2 Dual Band Cellular Telephone Transmitter
I
Single and Dual Band GSM Cellular Telephones
I
PCS Devices
I
Wireless Data Modems
I
TDMA Cellular Telephones
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.
Final Electrical Specifications
FEATURES
DESCRIPTIOU
APPLICATIU
TYPICAL APPLICATIO
U
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC1757A-2EMS#PBF | 功能描述:IC CTRLR RF POWER DUAL 10MSOP RoHS:是 類別:RF/IF 和 RFID >> RF 電源控制器 IC 系列:- 標(biāo)準(zhǔn)包裝:3,000 系列:- RF 型:GSM 頻率:450MHz ~ 2GHz 特點(diǎn):四頻帶 封裝/外殼:8-VFBGA 供應(yīng)商設(shè)備封裝:8-MicroSMD（1.51x1.51） 包裝:帶卷 (TR) 其它名稱:LMV243BLX |
| LTC1757A-2EMS#TR | 功能描述:IC CTRLR RF POWER DUAL 10MSOP RoHS:否 類別:RF/IF 和 RFID >> RF 電源控制器 IC 系列:- 標(biāo)準(zhǔn)包裝:3,000 系列:- RF 型:GSM 頻率:450MHz ~ 2GHz 特點(diǎn):四頻帶 封裝/外殼:8-VFBGA 供應(yīng)商設(shè)備封裝:8-MicroSMD（1.51x1.51） 包裝:帶卷 (TR) 其它名稱:LMV243BLX |
| LTC1757A-2EMS#TRPBF | 功能描述:IC CTRLR RF POWER DUAL 10MSOP RoHS:是 類別:RF/IF 和 RFID >> RF 電源控制器 IC 系列:- 標(biāo)準(zhǔn)包裝:3,000 系列:- RF 型:GSM 頻率:450MHz ~ 2GHz 特點(diǎn):四頻帶 封裝/外殼:8-VFBGA 供應(yīng)商設(shè)備封裝:8-MicroSMD（1.51x1.51） 包裝:帶卷 (TR) 其它名稱:LMV243BLX |
| LTC1758-1EMS8 | 功能描述:IC RF PWR CONTRLLR SINGLE 8-MSOP RoHS:否 類別:RF/IF 和 RFID >> RF 電源控制器 IC 系列:- 標(biāo)準(zhǔn)包裝:3,000 系列:- RF 型:GSM 頻率:450MHz ~ 2GHz 特點(diǎn):四頻帶 封裝/外殼:8-VFBGA 供應(yīng)商設(shè)備封裝:8-MicroSMD（1.51x1.51） 包裝:帶卷 (TR) 其它名稱:LMV243BLX |
| LTC1758-1EMS8#PBF | 功能描述:IC RF PWR CONTRLLR SINGLE 8-MSOP RoHS:是 類別:RF/IF 和 RFID >> RF 電源控制器 IC 系列:- 標(biāo)準(zhǔn)包裝:3,000 系列:- RF 型:GSM 頻率:450MHz ~ 2GHz 特點(diǎn):四頻帶 封裝/外殼:8-VFBGA 供應(yīng)商設(shè)備封裝:8-MicroSMD（1.51x1.51） 包裝:帶卷 (TR) 其它名稱:LMV243BLX |
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