欢迎访问ic37.com |
会员登录 免费注册
发布采购

OPA134UA 参数 Datasheet PDF下载

OPA134UA图片预览
型号: OPA134UA
PDF下载: 下载PDF文件 查看货源
内容描述: 高性能音频运算放大器TM [High Performance AUDIO OPERATIONAL AMPLIFIERS TM]
分类和应用: 运算放大器光电二极管PC
文件页数/大小: 9 页 / 330 K
品牌: BB [ BURR-BROWN CORPORATION ]
 浏览型号OPA134UA的Datasheet PDF文件第1页浏览型号OPA134UA的Datasheet PDF文件第2页浏览型号OPA134UA的Datasheet PDF文件第3页浏览型号OPA134UA的Datasheet PDF文件第4页浏览型号OPA134UA的Datasheet PDF文件第5页浏览型号OPA134UA的Datasheet PDF文件第6页浏览型号OPA134UA的Datasheet PDF文件第7页浏览型号OPA134UA的Datasheet PDF文件第9页  
APPLICATIONS INFORMATION  
V+  
Trim Range: ±4mV typ  
OPA134 series op amps are unity-gain stable and suitable  
for a wide range of audio and general-purpose applications.  
All circuitry is completely independent in the dual version,  
assuring normal behavior when one amplifier in a package  
is overdriven or short-circuited. Power supply pins should  
be bypassed with 10nF ceramic capacitors or larger to  
minimize power supply noise.  
10nF  
100kΩ  
7
1
2
3
8
6
OPA134  
OPA134 single op amp only.  
Use offset adjust pins only to null  
offset voltage of op amp—see text.  
4
10nF  
OPERATING VOLTAGE  
OPA134 series op amps operate with power supplies from  
±2.5V to ±18V with excellent performance. Although  
specifications are production tested with ±15V supplies,  
most behavior remains unchanged throughout the full  
operating voltage range. Parameters which vary signifi-  
cantly with operating voltage are shown in the typical  
performance curves.  
V–  
FIGURE 1. OPA134 Offset Voltage Trim Circuit.  
In many ways headroom is a subjective measurement. It can  
be thought of as the maximum output amplitude allowed  
while still maintaining a very low level of distortion. In an  
attempt to quantify headroom, we have defined “very low  
distortion” as 0.01%. Headroom is expressed as a ratio  
which compares the maximum allowable output voltage  
level to a standard output level (1mW into 600, or  
0.7746Vrms). Therefore, OPA134 series op amps, which  
have a maximum allowable output voltage level of 11.7Vrms  
(THD+Noise < 0.01%), have a headroom specification of  
23.6dBu. See the typical curve “Headroom - Total Harmonic  
Distortion + Noise vs Output Amplitude.”  
OFFSET VOLTAGE TRIM  
Offset voltage of OPA134 series amplifiers is laser trimmed  
and usually requires no user adjustment. The OPA134  
(single op amp version) provides offset trim connections  
on pins 1 and 8, identical to 5534 amplifiers. Offset  
voltage can be adjusted by connecting a potentiometer as  
shown in Figure 1. This adjustment should be used only to  
null the offset of the op amp, not to adjust system offset or  
offset produced by the signal source. Nulling offset could  
change the offset voltage drift behavior of the op amp.  
While it is not possible to predict the exact change in drift,  
the effect is usually small.  
DISTORTION MEASUREMENTS  
The distortion produced by OPA134 series op amps is below  
the measurement limit of all known commercially available  
equipment. However, a special test circuit can be used to  
extend the measurement capabilities.  
TOTAL HARMONIC DISTORTION  
OPA134 series op amps have excellent distortion character-  
istics. THD+Noise is below 0.0004% throughout the audio  
frequency range, 20Hz to 20kHz, with a 2kload. In  
addition, distortion remains relatively flat through its  
wide output voltage swing range, providing increased head-  
room compared to other audio amplifiers, including the  
OP176/275.  
Op amp distortion can be considered an internal error source  
which can be referred to the input. Figure 2 shows a  
circuit which causes the op amp distortion to be 101 times  
greater than normally produced by the op amp. The addition  
of R3 to the otherwise standard non-inverting amplifier  
R1  
R2  
SIG. DIST.  
R1  
R2  
R3  
10  
11Ω  
GAIN GAIN  
1
101  
1kΩ  
11  
101 1001kΩ  
101 101kΩ  
R3  
OPA134  
VO = 3Vrms  
101  
R2  
R1  
Signal Gain = 1+  
R2  
Distortion Gain = 1+  
R1 II R3  
Generator  
Output  
Analyzer  
Input  
Audio Precision  
System One  
Analyzer(1)  
IBM PC  
or  
Compatible  
RL  
1kΩ  
NOTE: (1) Measurement BW = 80kHz  
FIGURE 2. Distortion Test Circuit.  
®
8
OPA134/2134/4134