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THS4531A_16

更新时间： 2024-11-22 02:58:35
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德州仪器 - TI /
页数 文件大小 规格书
50页 1485K
描述
Ultra Low-Power, Rail-to-Rail Output, Fully Differential Amplifier

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THS4531A_16 数据手册

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THS4531A  
www.ti.com  
SLOS823A –DECEMBER 2012–REVISED JANUARY 2013  
Ultra Low Power, Rail-to-Rail Output, Fully-Differential Amplifier  
Check for Samples: THS4531A  
1
FEATURES  
DESCRIPTION  
The THS4531A 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 THS4531A 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: ±100 µV  
VOS Drift: ±3 µV/˚C (–40°C to +125°C)  
AOL: 114 dB  
•
•
•
Rail-to-Rail Output (RRO)  
Negative Rail Input (NRI)  
Output Common-Mode Control  
The THS4531A 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
−10  
−20  
−30  
−40  
VS = 5 V  
G = 1 V/V  
VOUT = 1 VRMS  
RF = 2 kΩ  
–
–
Differential to Differential Amplifier  
Single-Ended to Differential Amplifier  
RL = 600 Ω  
•
•
Low-Power, Wide-Bandwidth Differential Driver  
−50  
−60  
−70  
−80  
Low-Power, Wide-Bandwidth Differential  
Signal Conditioning  
−90  
•
High Channel Count and Power Dense  
Systems  
−100  
−110  
−120  
−130  
−140  
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 © 2012–2013, Texas Instruments Incorporated  
1234567...50

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