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LTC5598

更新时间： 2024-11-11 11:41:35
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
30页 676K
描述
200MHz to 6000MHz Quadrature Modulator with Ultrahigh OIP3

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中文翻译

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LTC5598 数据手册

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LTC5588-1  
200MHz to 6000MHz  
Quadrature Modulator  
with Ultrahigh OIP3  
FEATURES  
DESCRIPTION  
The LTC®5588-1 is a direct conversion I/Q modulator  
designed for high performance wireless applications. It  
allows direct modulation of an RF signal using differential  
baseband I and Q signals. It supports LTE, GSM, EDGE,  
TD-SCDMA, CDMA, CDMA2000, W-CDMA, WiMax and  
other communication standards. It can also be config-  
ured as an image reject upconverting mixer, by applying  
90° phase-shifted signals to the I and Q inputs. The I/Q  
baseband inputs drive double-balanced mixers. An on-  
chipbalunconvertsthedifferentialmixersignalstoa50Ω  
single-ended RF output. Four balanced I and Q baseband  
input ports are DC-coupled with a common mode volt-  
age level of 0.5V. The LO path consists of an LO buffer  
with single-ended or differential inputs and precision  
quadrature generators to drive the mixers. The supply  
voltage range is 3.15V to 3.45V. An external voltage can  
be applied to the LINOPT pin to further improve 3rd-order  
linearity performance. Accurate temperature dependent  
calibrationscanbeperformedusingtheon-chipthermistor.  
n
Frequency Range: 200MHz to 6000MHz  
n
OutputIP3:+31dBmTypicalat2140MHz(Uncalibrated)  
+35dBmTypical(UserOptimized)  
n
Single Pin Calibration to Optimize OIP3  
n
Low Output Noise Floor at 6MHz Offset:  
No RF: –160.6dBm/Hz  
P
= 5dBm: –155.5dBm/Hz  
OUT  
n
n
Integrated LO Buffer and LO Quadrature Phase  
Generator  
High Impedance DC Interface to Baseband Inputs  
with 0.5V Common Mode Voltage*  
50Ω Single-Ended LO and RF Ports  
3.3V Operation  
n
n
n
n
n
Fast Turn-Off/On: 10ns/17ns  
Temperature Sensor (Thermistor)  
24-Lead UTQFN 4mm × 4mm Package  
APPLICATIONS  
n
LTE, GSM/EDGE, W-CDMA, TD-SCDMA, CDMA2K,  
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.  
*Contact LTC Marketing for other common mode voltage versions.  
WiMax Basestations  
n
Image Reject Upconverters  
Point-to-Point Microwave Links  
Broadcast Modulator  
Military Radio  
n
n
n
ACPR, AltCPR and ACPR, AltCPR  
with Optimized LINOPT Voltage vs RF  
Output Power at 2.14GHz for  
TYPICAL APPLICATION  
200MHz to 6000MHz Direct Conversion Transmitter Application  
W-CDMA 1, 2 and 4 Carriers  
–40  
–50  
–60  
–70  
–80  
–90  
3.3V  
ACPR  
1nF + 4.7μF  
s2  
4C  
2C  
ACPR (OPT)  
AltCPR  
V
CC  
LTC5588-1  
RF = 200MHz  
TO 6000MHz  
1C  
I-DAC  
VmI  
I-CHANNEL  
AltCPR (OPT)  
6.8pF  
DOWNLINK TEST  
MODEL 64 DPCH  
= 140MHz,  
= 2280MHz  
PA  
0o  
f
f
BB  
LO  
EN  
0.2pF  
90o  
Q-CHANNEL  
Q-DAC  
VmI  
LINOPT  
BASEBAND  
GENERATOR  
LTC2630  
1nF  
50Ω  
1nF  
55881 TA01a  
–20  
–15  
–10  
–5  
0
5
55881 TA01b  
RF OUTPUT POWER PER CARRIER (dBm)  
VCO/SYNTHESIZER  
55881fb  
1
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