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THS4509

更新时间： 2024-09-26 22:53:07
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德州仪器 - TI 放大器
页数 文件大小 规格书
30页 2105K
描述
WIDEBAND, LOW NOISE, LOW DISTORTION FULLY DIFFERENTIAL AMPLIFIER

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THS4509 数据手册

 浏览型号THS4509的Datasheet PDF文件第2页浏览型号THS4509的Datasheet PDF文件第3页浏览型号THS4509的Datasheet PDF文件第4页浏览型号THS4509的Datasheet PDF文件第5页浏览型号THS4509的Datasheet PDF文件第6页浏览型号THS4509的Datasheet PDF文件第7页 
THS4509  
www.ti.com  
SLOS454–JANUARY 2005  
WIDEBAND, LOW NOISE, LOW DISTORTION FULLY DIFFERENTIAL AMPLIFIER  
To allow for dc coupling to ADCs, its unique output  
common-mode control circuit maintains the output  
common-mode voltage within 3 mV offset (typ) from  
the set voltage, when set within 0.5 V of mid-supply,  
with less than 4 mV differential offset voltage. The  
common-mode set point is set to mid-supply by  
internal circuitry, which may be over-driven from an  
external source.  
FEATURES  
•
•
•
•
Fully Differential Architecture  
Centered Input Common-mode Range  
Minimum Gain of 2V/V (6 dB)  
Bandwidth: 1900 MHz (100 mVpp, G = 10 dB,  
RL = 200 Ω)  
•
•
•
Slew Rate: 6600 V/µs (2V step, G = 10 dB)  
1% Settling Time: 2 ns (2 V step, G = 10 dB)  
The input and output are optimized for best perform-  
ance with their common-mode voltages set to  
mid-supply. Along with high performance at low  
power supply voltage, this makes for extremely high  
performance single supply 5 V data acquisition sys-  
tems. The combined performance of the THS4509 in  
a gain of 10 dB driving the ADS5500 ADC, sampling  
at 125 MSPS, is 81 dBc SFDR and 69.1 dBc SNR  
with a –1 dBFS signal at 70 MHz.  
HD2: –75 dBc at 100 MHz (2 Vpp, G = 10 dB,  
RL = 1 kΩ)  
•
•
•
HD3: –80 dBc at 100 MHz (2 Vpp, G = 10 dB,  
RL = 1 kΩ)  
OIP2: 79 dBm at 70 MHz (2 Vpp envelope,  
G = 10 dB)  
OIP3: 43 dBm at 70 MHz (2 Vpp envelope,  
G = 10 dB)  
The THS4509 is offered in a Quad 16-pin leadless  
QFN package (RGT), and is characterized for oper-  
ation over the full industrial temperature range from  
–40°C to 85°C.  
•
•
Input Voltage Noise: 1.9 nV/√Hz (f >10 MHz)  
Noise Figure: 17.1 dB (50 Ω System, G = 10  
dB)  
V
IN  
100 Ω  
348 Ω  
2.5 V  
From  
50 Ω  
Source  
•
•
Output Common-Mode Control  
Power Supply:  
69.8 Ω  
V
OUT  
487 Ω  
487 Ω  
1:1  
To 50 Ω  
– Voltage: 3 V (±1.5 V) to 5 V (±2.5 V)  
– Current: 37.7 mA  
Test  
Equipment  
56.3 Ω  
THS 4509  
100 Ω  
0.22 µF  
49.9 Ω  
CM  
69.8 Ω  
Open  
•
Power-Down Capability: 0.65 mA  
−2.5 V  
APPLICATIONS  
348 Ω  
•
5 V Data Acquisition Systems High  
Linearity ADC Amplifier  
Wireless Communication  
Medical Imaging  
Test and Measurement  
-75  
-80  
-85  
-90  
-95  
G = 10 dB,  
V
= 2 V  
,
•
•
•
O
PP  
R
L
= 1 kW  
DESCRIPTION  
HD  
3
The THS4509 is a wideband, fully differential op amp  
designed for 5 V data acquisition systems. It has very  
low noise at 1.9 nV/√Hz, and extremely low harmonic  
distortion of –75 dBc HD2 and –80 dBc HD3 at 100  
MHz with 2 Vpp, G = 10 dB, and 1 kΩ load. Slew rate  
is very high at 6600 Vµs and with settling time of 2 ns  
to 1% (2 V step) it is ideal for pulsed applications. It is  
designed for minimum gain of 6 dB, but is optimized  
for gain of 10 dB.  
-100  
-105  
-110  
HD  
2
10  
100  
1
f - Frequency - MHz  
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas  
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
PRODUCTION DATA information is current as of publication date.  
Copyright © 2005, Texas Instruments Incorporated  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
1234567...30

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