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參數資料
| 型號： | ad8360 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | DC-2.5GHz TruePower Detector/Controller(RMS-DC轉換器) |
| 中文描述： | 的DC - 2.5GHz的TruePower器/控制器（有效值直流轉換器） |
| 文件頁數： | 1/1頁 |
| 文件大小： | 18K |
| 代理商： | AD8360 |
DC-2.5GHz TruePower
Detector/Controller
FEATURES
True RMS to DC Conversion
Uses Accurate Wideband Square-Law Detector
Greater Than 20 dB Input Range
Differential Inputs, 50
100 mV RMS Full-Scale Output
Flat Response from DC to 2.5 GHz
Linear Output, 0 to 1.25 V into 50
Measurement or Control Mode
Operation at Supply Voltages from 2.4 - 5.5 V
Error-Integrator Output, 0 to >3V
@ V =5V
External Capacitor Extends T
AVERAGE
Rapid Power-down to 1
μ
A max.
min. @ V
P
= 3V
APPLICATIONS
Accurate RMS Measurement of RF Power (in dB)
Power Amplifier Control Loops
PRODUCT DESCRIPTION
The AD8360 is a low power RMS-responding RF detector
(RMS to DC Converter) for use in high frequency (up to 2.5
GHz) receiver and transmitter signal chains. It is very easy to
apply, requiring only a single supply between 2.4 V and 5.5 V,
and decoupling and input coupling capacitors, for most appli-
cations. Its fully-differential input is DC-coupled, and the av-
eraging filter time-constant may be increased without limit;
thus the AD8360 may be used as easily in many low frequency
applications.
A wideband square-law detector provides true RMS response
to the input. The current-mode output of this cell is compared
against the output of an identical cell, whose signal input is
derived from the VSET input. Used as a controller, the result-
ing error is amplified by a precision high-grain low-offset cir-
cuit, and presented at the pin VRMS. This output signal may
then be used to control the gain of the RF amplifier, and restore
a balance between the set-point and the actual signal. The
detected signal (at twice the input frequency) is low-pass fil-
tered by an on-chip 50 pF capacitor. The corner frequency of
this filter may be lower without limit by the addition of an
external capacitor on the FLTR pin.
When used as a true power measurement device, VRMS is
strapped to VSET. The voltage at this pin is then linearly pro-
portional to the RMS voltage applied to the signal interface.
Excellent linearity is achieved in this mode, over a dynamic
range of about 20 dB. The output is insensitive to either the
supply voltage or temperature. At frequencies below the filter
corner, the output becomes simply the absolute value of the
input voltage.
The VRMS output runs from true-zero to about 1.75 V below
the supply voltage, and can drive a load of 50
to 1.25 V,
when using a 3V supply. The VSET input likewise runs from
zero to about +1.25 at a supply of 3 V, and presents a resistive
input of about 10k
.
The chip may be powered on or off by a voltage applied to the
ENBL pin. When this voltage is below the threshold of about
1.5V, the total dissipation will be in the microwatt range. Above
this threshold, the chip powers-up within about 200 ns to its
normal operating current of 2mA at 25°C. The AD8360 is avail-
able in a Micro SO-8 package.
This datasheet describes a product in development. Specifications and pin-out are subject to change without notice. For additional information, please
contact Analog Devices, ALP Marketing, 804 Woburn Street, Wilmington, MA 01887. Tel.: (781)937-1292 Patent Pending.
REV 4
9/24/98
RF/IF PRODUCT CONCEPT
AD8360
a
5
7
8
x
2
x
2
+
VRMS
VSET
WIDEBAND
SQUARERS
ERROR
AMPLIFIER
SET-POINT
INTERFACE
+
1
2
3
4
COMM
50pF
8-PIN MICRO-SO
FLTR
ENBL
INHI
INLO
VPOS
6
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| AD8361ARM-REEL7 | 功能描述:IC PWR DETECTOR 2.5GHZ 8-MSOP RoHS:否 類別:RF/IF 和 RFID >> RF 檢測器 系列:- 產品變化通告:Product Discontinuation 15/May/2006 標準包裝:3,000 系列:- 頻率:100MHz ~ 2GHz RF 型:手機，GSM，DCS，PCS 輸入范圍:- 精確度:- 電源電壓:2.7 V ~ 5.5 V 電流 - 電源:300µA 包裝:帶卷 (TR) 封裝/外殼:SC-74，SOT-457 其它名稱:NCS5000SNT1GOS |
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