TSZ182 datasheet(26/39 Pages) STMICROELECTRONICS

номер детали	TSZ182

подробное описание детали	Very high accuracy (25 μV) high bandwidth (3 MHz) zero drift 5 V dual operational amplifiers

PDF	39 Pages

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производитель	STMICROELECTRONICS [STMicroelectronics]

домашняя страница	http://www.st.com

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Application information

TSZ182

26/39

DocID029836 Rev 1

5.10

1/f noise

1/f noise, also known as pink noise or flicker noise, is caused by defects, at the atomic

level, in semiconductor devices. The noise is a non-periodic signal and it cannot be

calibrated. So for an application requiring precision, it is extremely important to take this

noise into account.

1/f noise is a major noise contributor at low frequencies and causes a significant output

voltage offset when amplified by the noise gain of the circuit. But, the TSZ182, thanks to its

chopper architecture, rejects 1/f noise and thus makes this device an excellent choice for

DC high precision applications.

As shown in Figure 28: "Noise 0.1 - 10 Hz vs time", 0.1 Hz to 10 Hz amplifier voltage noise

is only 400 nVpp for a VCC = 5 V. Figure 29: "Noise vs frequency" and Figure 30: "Noise vs

frequency and temperature" show the voltage noise density of the amplifier with no 1/f

noise on a large bandwith. Figure 57: "Noise vs frequency between 0.1 and 10 Hz

exhibiting no 1/f noise" below depicts noise vs frequency between 0.1 and 10 Hz exhibiting

no 1/f noise.

Figure 57: Noise vs frequency between 0.1 and 10 Hz exhibiting no 1/f noise

TSZ182 датащи(PDF) 26 Page - STMicroelectronics