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LTC5583

更新时间： 2023-12-20 18:45:21
品牌 Logo 应用领域
亚德诺 - ADI /
页数 文件大小 规格书
28页 1141K
描述
匹配的双通道、6GHz RMS 功率检波器

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中文翻译

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LTC5583 数据手册

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LTC5583  
Matched Dual-Channel  
6GHz RMS Power Detector  
FEATURES  
DESCRIPTION  
n
Frequency Range: 40MHz to 6GHz  
The LTC®5583 is a dual-channel RMS power detector,  
capable of measuring two AC signals with wide dynamic  
range, from –59dBm to 4dBm, depending on frequency.  
EachACsignal’spowerindecibel-scaledvalueisprecisely  
converted to a DC voltage on a linear scale, independent  
of the crest factor of the input signal waveforms. The  
LTC5583issuitableforprecisionpowermeasurementand  
level control for a variety of RF standards, including LTE,  
EDGE, W-CDMA, CDMA2000, TD-SCDMA, and WiMAX.  
n
Linear Dynamic Range: Up to 60dB  
n
0.5dB (Typ) Accuracy Over Temperature  
n
40dB Channel-to-Channel Isolation at 2GHz Even  
with Single-Ended RF Inputs  
n
Matched Dual-Channel Outputs: <1.25dB (Typ)  
n
Single-Ended RF Inputs—No Transformer Required  
n
Accurate RMS Power Measurement of High Crest  
Factor Modulated Waveforms  
n
Difference Output Provides VSWR Measurement  
Good channel-to-channel isolation is necessary for oper-  
ating the dual channels simultaneously. For applications  
wherethetwoinputsignalsareatthesamefrequency(e.g.  
measuring VSWR), the LTC5583 provides 40dB isolation  
at 2.14GHz even with single-ended inputs. No baluns are  
needed.Whenthetwoinputsignalsareatdifferentfrequen-  
cies, the isolation can be as high as 50dB. The isolation  
can be improved to >55dB with differential inputs.  
n
Fast Envelope Detector Outputs  
n
Fast Response Time: 140ns Rise Time  
n
Small 4mm × 4mm QFN24 Package  
APPLICATIONS  
n
VSWR Monitor  
n
MIMO Transmit Power Control  
n
The power difference of the two input signals is provided  
at a difference output pin. Each channel also has a fast  
envelope detector, which tracks the RF input signal’s en-  
velope and outputs a voltage directly proportional to the  
signal’s instantaneous power. The envelope detectors can  
be disabled to reduce power consumption.  
Basestation PA Control  
n
Transmit and Receive Gain Control  
n
RF Instrumentation  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear  
Technology Corporation. All other trademarks are the property of their respective owners.  
Protected by U.S. Patents including 7262661, 7317357, 7622981.  
TYPICAL APPLICATION  
Output Voltage and Linearity Error  
vs RF Input Power, 2140MHz CW  
Inputs, Single-Ended Drive  
Block Diagram  
2.5  
2.0  
1.5  
1.0  
0.5  
0
2.5  
+
–
IN A  
IN A  
2.0  
V
OA  
ENVA  
1.5  
ENVELOPE  
DETECT  
RMS  
1.0  
DETECT  
0.5  
+
–
V
ODF  
0
–0.5  
–1.0  
–1.5  
–2.0  
–2.5  
85°C, CH A  
85°C, CH B  
25°C, CH A  
25°C, CH B  
–40°C, CH A  
–40°C, CH B  
ENVB  
DIFFERENCE  
AMPLIFIER  
ENVELOPE  
DETECT  
RMS  
DETECT  
V
OB  
LTC5583  
–65 –55 –45 –35 –25 –15 –5  
INPUT POWER (dBm)  
5
+
–
V
OS  
IN B  
IN B  
INV  
5583 BD  
5583 TA01b  
5583fa  
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