40 mF

10 F

1 k

10 k

100

REF19xx

VIN

EN

GND

VREF

VBIAS

2-Pole High-pass

4-Pole Low-pass

0.1 Hz to 10 Hz Filter

To scope

0.1 F

Time (1 s/div)

C028

Time (1 s/div)

C029

14

REF1925, REF1930, REF1933, REF1941

SBOS697A – SEPTEMBER 2014 – REVISED JANUARY 2017

www.ti.com

Product Folder Links: REF1925 REF1930 REF1933 REF1941

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8.3 Noise Performance

Typical 0.1-Hz to 10-Hz voltage noise is shown in Figure 41 and Figure 42. Device noise increases with output

voltage and operating temperature. Additional filtering can be used to improve output noise levels, although care

must be taken to ensure the output impedance does not degrade ac performance. Peak-to-peak noise

measurement setup is shown in Figure 43.

Figure 41. 0.1-Hz to 10-Hz Noise (VREF)

Figure 42. 0.1-Hz to 10-Hz Noise (VBIAS)

Figure 43. 0.1-Hz to 10-Hz Noise Measurement Setup