SI8220CD-A-ISR Silicon Laboratories Inc, SI8220CD-A-ISR Datasheet - Page 12
![IC ISODRIVER 2.5A OPTO IN 16SOIC](/photos/7/41/74106/16-soic__7_5mmwidth__sml.jpg)
SI8220CD-A-ISR
Manufacturer Part Number
SI8220CD-A-ISR
Description
IC ISODRIVER 2.5A OPTO IN 16SOIC
Manufacturer
Silicon Laboratories Inc
Datasheet
1.SI8220CB-A-ISR.pdf
(30 pages)
Specifications of SI8220CD-A-ISR
Configuration
Isolated
Input Type
Opto
Delay Time
50ns
Current - Peak
2.5A
Number Of Configurations
1
Number Of Outputs
2
Voltage - Supply
6.5 V ~ 24 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
16-SOIC (0.300", 7.5mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
High Side Voltage - Max (bootstrap)
-
Si8220/21
4. Application Information
4.1. Theory of Operation
The Si8220/21 is a functional upgrade for popular opto-isolated drivers, such as the Avago HPCL-3120, HPCL-
0302, Toshiba TLP350, and others. The operation of an Si8220/21 channel is analogous to that of an opto coupler,
except an RF carrier is modulated instead of light. This simple architecture provides a robust isolated data path and
requires no special considerations or initialization at start-up. A simplified block diagram for the Si8220/21 is shown
in Figure 5.
A channel consists of an RF Transmitter and RF Receiver separated by a semiconductor-based isolation barrier.
Referring to the Transmitter, input A modulates the carrier provided by an RF oscillator using on/off keying. The
Receiver contains a demodulator that decodes the input state according to its RF energy content and applies the
result to output B via the output driver. This RF on/off keying scheme is superior to pulse code schemes as it
provides best-in-class noise immunity, low power consumption, and better immunity to magnetic fields. See
Figure 6 for more details.
12
A
Transmitter
Emulator
LED
OSCILLATOR
MODULATOR
Figure 5. Simplified Channel Diagram
RF
Figure 6. Modulation Scheme
Semiconductor-
Based Isolation
Barrier
Rev. 1.0
DEMODULATOR
Receiver
Modulation Signal
Output Signal
Input Signal
Gnd
V
DD
0.5 to 2.5 A
peak
B