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SC4437

10

Applications Information (continued)

Start Up

With the input voltage 5.8V, the device shows very small

start up overshoot, as shown by the gure below.

Low Noise Operation

The SC4437 is a low noise reference. The noise is measured

with high gain ampli cation and band ltering. Without

any output capacitor the noise level is measured to be

the noise level will be signi cantly lower. The following

gure shows the noise measurement result under room

temperature without output capacitor from 10Hz to

100kHz and the scope picture of noise measurement

result from 0.1 Hz to 10 Hz .

Noise Density VS Frequency

0.100

1.000

0.01

0.1

110100

Frequency (kHz)