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THS4520_14

更新时间： 2024-02-26 00:34:14
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德州仪器 - TI 放大器
页数 文件大小 规格书
54页 1182K
描述
WIDEBAND, LOW NOISE, LOW DISTORTION FULLY DIFFERENTIAL AMPLIFIER

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THS4520_14 数据手册

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THS4531  
www.ti.com  
SLOS358B –SEPTEMBER 2011–REVISED MARCH 2012  
Ultra Low Power, Rail-to-Rail Output, Fully-Differential Amplifier  
Check for Samples: THS4531  
1
FEATURES  
DESCRIPTION  
The THS4531 is a low-power, fully-differential op amp  
with input common-mode range below the negative  
rail and rail-to-rail output. The device is designed for  
low-power data acquisition systems and high density  
applications where power consumption and  
dissipation is critical.  
•
Ultra Low Power:  
–
–
–
Voltage: 2.5 V to 5.5 V  
Current: 250 µA  
Power-Down Mode: 0.5 µA (typ)  
•
•
•
•
•
•
Fully-Differential Architecture  
Bandwidth: 36 MHz  
The device features accurate output common-mode  
control that allows for dc coupling when driving  
analog-to-digital converters (ADCs). This control,  
coupled with the input common-mode range below  
the negative rail and rail-to-rail output, allows for easy  
interface from single-ended ground-referenced signal  
sources to successive-approximation registers  
(SARs), and delta-sigma (ΔΣ) ADCs using only  
single-supply 2.5-V to 5-V power. The THS4531 is  
also a valuable tool for general-purpose, low-power  
differential signal conditioning applications.  
Slew Rate: 200 V/µs  
THD: –120 dBc at 1 kHz (1 VRMS, RL= 2 kΩ)  
Input Voltage Noise: 10 nV/√Hz (f = 1 kHz)  
High DC Accuracy:  
–
–
VOS Drift: ±4 µV/˚C (–40°C to +125°C)  
AOL: 114 dB  
•
•
•
Rail-to-Rail Output (RRO)  
Negative Rail Input (NRI)  
Output Common-Mode Control  
The THS4531 is characterized for operation over the  
extended industrial temperature range from –40°C to  
+125°C. The following package options are available:  
APPLICATIONS  
•
•
8-pin SOIC (MSOP) and VSSOP (D and DGK)  
10-pin WQFN (RUN)  
•
•
Low-Power SAR, ΔΣ ADC Driver  
Low Power, High Performance:  
0
VS = 5 V  
G = 1 V/V  
VOUT = 1 VRMS  
RF = 2 kΩ  
−10  
−20  
−30  
−40  
−50  
–
–
Differential to Differential Amplifier  
Single-Ended to Differential Amplifier  
•
•
Low-Power, Wide-Bandwidth Differential Driver  
RL = 600 Ω  
Low-Power, Wide-Bandwidth Differential  
Signal Conditioning  
−60  
−70  
−80  
−90  
−100  
−110  
−120  
−130  
−140  
•
High Channel Count and Power Dense  
Systems  
0
5k  
10k  
15k  
20k  
24k  
Frequency (Hz)  
G071  
Figure 1. 1-kHz FFT Plot on Audio Analyzer  
Table 1. Related Products  
THD (dBc) at 100  
DEVICE  
BW (MHz)  
IQ (mA)  
kHz  
VN (nV/√Hz)  
RAIL-TO-RAIL  
THS4521  
THS4520  
THS4121  
THS4131  
145  
570  
100  
150  
1.14  
15.3  
16  
–120  
–114  
–79  
4.6  
2
Out  
Out  
5.4  
1.3  
In/Out  
No  
16  
–107  
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 © 2011–2012, Texas Instruments Incorporated  
 
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