Si8244BB-B-IS1 Silicon Laboratories Inc, Si8244BB-B-IS1 Datasheet - Page 12

• Manufacturer Part Number: Si8244BB-B-IS1
• Description: Audio Amplifiers 2.5kV 4A Class D Audio Driver 8V UVLO
• Manufacturer: Silicon Laboratories Inc

Specifications of Si8244BB-B-IS1

• Product: Audio Line Drivers / Receivers
• Thd Plus Noise: 0.02 %
• Supply Current: 2 mA
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Output Type: 2-Channel Stereo
• Package / Case: SOIC-16 Narrow
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Si824x
3. Functional Description
The operation of an Si824x channel is analogous to that of an opto coupler and gate driver, 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 a single Si824x channel is shown in
Figure 5.
Transmitter
Receiver
Driver
RF Oscillator
V
DD
Semiconductor-
Dead
Based Isolation
B
A
Time
Modulator
Demodulator
Barrier
0.5 to 4 A
Generator
peak
Gnd
Figure 5. Simplified Channel Diagram
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.
Input Signal
Modulation Signal
Output Signal
Figure 6. Modulation Scheme
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