HCPL788J Datasheet, PDF (11/20 Pages) Agilent(Hewlett-Packard) – Isolation Amplifier with Short Circuit and Overload Detection

11
V_IN+
50 Ω
1
10 Ω 0.01 µF
3
0.1 µF
4
6
V_DD1
5, 7
0.1 µF
2, 8
HCPL-788J
Figure 20. AC Test Circuit.
5V
4.7 kΩ
14
FAULT
13
ABSVAL
12
V_OUT
11
V_REF
0.1 µF
10,15
9, 16
V_DD2
0.1 µF
1 V_IN+
2 V_IN-
FAULT
DETECT
Σ∆
MODULATOR
ENCODER
3 C_H
4 C_L
256 mV
REFERENCE
6 V_LED+
5 V_DD1
7 V_DD1
8 GND₁
Figure 21. Internal Block Diagram.
HCPL-788J
DECODER
D/A
LPF
V_REF 11
V_OUT 12
RECTIFIER
ABSVAL 13
FAULT 14
V_DD2 15
V_DD2 10
GND₂ 9
GND₂ 16