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THS4509-Q1 PDF预览

THS4509-Q1

更新时间: 2024-11-16 12:21:43
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德州仪器 - TI 放大器
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37页 1687K
描述
WIDEBAND LOW-NOISE LOW-DISTORTION FULLY DIFFERENTIAL AMPLIFIER

THS4509-Q1 数据手册

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THS4509-Q1  
www.ti.com ........................................................................................................................................................................................... SLOS547NOVEMBER 2008  
WIDEBAND LOW-NOISE LOW-DISTORTION FULLY DIFFERENTIAL AMPLIFIER  
1
FEATURES  
DESCRIPTION  
Qualified for Automotive Applications  
Fully Differential Architecture  
Centered Input Common-Mode Range  
Minimum Gain of 2 V/V (6 dB)  
Bandwidth: 1900 MHz  
The THS4509 is  
a
wideband, fully differential  
operational  
amplifier 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-kload. Slew rate is very  
high at 6600 V/µs 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.  
Slew Rate: 6600 V/µs  
1% Settling Time: 2 ns  
HD2: –75 dBc at 100 MHz  
HD3: –80 dBc at 100 MHz  
OIP2: 73 dBm at 70 MHz  
To allow for dc coupling to analog-to-digital  
converters (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 overdriven from an external source.  
OIP3: 37 dBm at 70 MHz  
Input Voltage Noise: 1.9 nV/Hz (f > 10 MHz)  
Noise Figure: 17.1 dB  
Output Common-Mode Control  
Power Supply:  
Voltage: 3 V (±1.5 V) to 5 V (±2.5 V)  
Current: 37.7 mA  
The input and output are optimized for best  
performance 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  
systems. 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.  
Power-Down Capability: 0.65 mA  
APPLICATIONS  
5-V Data Acquisition Systems High Linearity  
ADC Amplifier  
Wireless Communication  
Medical Imaging  
Test and Measurement  
The THS4509 is offered in a quad 16-pin leadless  
QFN package (RGT) and is characterized for  
operation over the full automotive temperature range  
from –40°C to 125°C.  
RELATED PRODUCTS  
DEVICE  
MINIMUM  
GAIN  
COMMON-MODE  
RANGE OF INPUT(1)  
100 Ω  
348 Ω  
2.5 V  
V
IN  
From  
50 Ω  
Source  
THS4509  
6 dB  
0.75 V to 4.25 V  
69.8 Ω  
(1) Assumes a 5-V single-ended power supply  
V
OUT  
487 Ω  
487 Ω  
1:1  
To 50 Ω  
Test  
Equipment  
56.3 Ω  
THS 4509  
100 Ω  
0.22 µF  
49.9 Ω  
CM  
69.8 Ω  
Open  
−2.5 V  
348 Ω  
1
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.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2008, Texas Instruments Incorporated  

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