想请问
目前有在拍卖网站上查询一些集音器(也有人说叫拾音器,收音器)的产品
是想要接在监视器主机DVR上面
价位有五六十元到五六百元的
控制芯片也有飞利浦,TI,AD,Panasonic的
不知道目前哪一家的控制芯片,在录音品质上会比较好呢?
例如目前查到这两种
Analog Devices的AD797芯片跟美国德州仪器Texas Instruments的NE5532芯片
可是看不太懂..所以想请问哪种产品的录音品质会比较好呢?
谢谢
以下是AD797的内容:
(取自http://www.analog.com/media/en/technical-documentation/data-sheets/AD797.pdf)
FEATURES
Low noise
0.9 nV/√Hz typical (1.2 nV/√Hz maximum) input voltage
noise at 1 kHz
50 nV p-p input voltage noise, 0.1 Hz to 10 Hz
Low distortion
?120 dB total harmonic distortion at 20 kHz
Excellent ac characteristics
800 ns settling time to 16 bits (10 V step)
110 MHz gain bandwidth (G = 1000)
8 MHz bandwidth (G = 10)
280 kHz full power bandwidth at 20 V p-p
20 V/μs slew rate
Excellent dc precision
80 μV maximum input offset voltage
1.0 μV/°C VOS drift
Specified for ±5 V and ±15 V power supplies
High output drive current of 50 mA
图片网址:
http://img.ruten.com.tw/s1/3/bc/6d/21445656263789_441.jpg
以下是NE5532的内容:
(取自http://www.ti.com/lit/ds/symlink/ne5532.pdf)
Features
Equivalent Input Noise Voltage:
5 nV/√Hz Typ at 1 kHz
Unity-Gain Bandwidth: 10 MHz Typ
Common-Mode Rejection Ratio: 100 dB Typ
High DC Voltage Gain: 100 V/mV Typ
Peak-to-Peak Output Voltage Swing 26 V Typ With VCC± = ±15 V and RL = 600 ?
High Slew Rate: 9 V/μs Typ
图片网址:
http://img.ruten.com.tw/s1/8/7f/11/21301076395793_100.jpg