8.4 Noise Performance

Typical 0.1-Hz to 10-Hz voltage noise can be seen in Figure 8-7 and Figure 8-8. Device noise increases

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

although care should be taken to ensure the output impedance does not degrade ac performance. Peak-to-peak

noise measurement setup is shown in Figure 8-9.

Time (1 s/div)

C028

Figure 8-7. 0.1-Hz to 10-Hz Noise (VREF)

Time (1 s/div)

C029

Figure 8-8. 0.1-Hz to 10-Hz Noise (VBIAS)

40 mF

10 F

1 k

10 k

100

REF20xx

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

Figure 8-9. 0.1-Hz to 10-Hz Noise Measurement Setup

REF2025, REF2030, REF2033, REF2041

SBOS600E – JULY 2018 – REVISED FEBRUARY 2022

www.ti.com

16

Submit Document Feedback

Copyright © 2022 Texas Instruments Incorporated

Product Folder Links: REF2025 REF2030 REF2033 REF2041