HA17L431/HA17L431A Series

8

Noise Recovery Characteristics of HA17L431A and HA17L431

The HA17L431A bettered V

15 V

220 pF

(External)

12 k

Ω

Input pulse

1 V

680

Ω

7.5 k

Ω

220

µF

4.7 k

Ω

0.1

µF

0 V

50 ms

(Cathode)

(Anode)

Shunt

Regulators

(REF)

Pulse

generator

Vref

Vout

Figure 1 Noise Response Characteristics Measurement Circuit

1

2

Trig?

Tek Run: 25.0MS/s

Sample

Ch1

Ch3

500mV

1.00 V

Ch2

Ch2

2.46 V

1.00 V

M 2.00

µs

T

[

⋅⋅⋅⋅⋅T⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅]

1

2

Trig?

Tek Run: 25.0MS/s

Sample

Ch1

Ch3

500mV

1.00 V

Ch2

Ch2

2.46 V

1.00 V

M 2.00

µs

T

[

⋅⋅⋅⋅⋅T⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅⋅]

Waveform of HA17L431A

Waveform of HA17L431

Input Noise

Vref

Input Noise

Vref

Figure 2 Noise Recovery Characteristics