/a>Amplifier” title=”Amplifier”>Amplifier” title=”Amplifier”>Amplifier and Video Amplifier, with built-in charge pump circuit, from a single 3.3V supply, can get 2Vrms output, and has excellent linearity. The THD+N of the audio amplifier is -90dB, the S/N is 102dB, the S/N of the video amplifier is 75dB (typ), and the amplifier gain is +6dB. This article introduces the main features of AK4203, block diagram, typical connection diagram, evaluation board AKD4203 -A functional and block diagrams, as well as circuit diagrams and component layouts.
Stereo Cap-less LINE-Amp and Video-Amp
The AK4203 is an audio stereo cap-less line driver with 1-channel video driver. It eliminates the need for large DC-blocking capacitors with a built-in Charge-pump circuit. The AK4203 achieves 2Vrms outputs with excellent linearity 2Vrms output by single 3.3V power supply. The AK4203 is available in small 16-pin TSSOP, saving the system space and cost.
Main features of AK4203:
Audio Line-Amp
Differential Input
Stereo Cap-less Amplifier (No DC-blocking capacitors required)
Line-Out level: 2.0Vrms
THD+N: -90dB
S/N: 102dB
Output gain: 6dB
Low-pass Filter: fc= 130kHz
Pop Noise Free Ground-referenced Output Video Amp
1ch Stereo Cap-less Amplifier (No DC-blocking capacitors required)
Integrated Video Amplifier (+6dB)
Input Level: 1.5Vpp (max)
SN: 75dB(typ), Bandwidth: 100kHz ∼ 6MHz
LPF: [email protected] (typ), [email protected] (typ)
Video Mute Function
Power Supply: 3.0V ~ 3.6V
Ta: -20 ~ 85℃
Package: 16TSSOP
Figure 1. AK4203 block diagram
Figure 2. Typical connection diagram of AK4203
AK4203 Evaluation Board AKD4203-A
The AKD4203-A is an evaluation board for a fast evaluation of the AK4203,
Evaluation requires audio/video analog analyzers/generators and a power supply.
Evaluation Board AKD4203-A Features:
• RCA jacks for analog audio input/output
• XLR jacks for analog audio input
• RCA jacks for video input/output
Figure 3. Block Diagram of Evaluation Board AKD4203-A
Figure 4. Evaluation Board AKD4203-A Circuit Diagram (1)
Figure 5. Evaluation Board AKD4203-A Circuit Diagram (2)
Figure 6. Evaluation Board AKD4203-A Circuit Diagram (3)
Figure 7. Evaluation Board AKD4203-A Circuit Diagram (4)
Figure 8. Evaluation Board AKD4203-A Component Layout
For details, see:
http://www.asahi-kasei.co.jp/akm/en/product/ak4203/ak4203_f00e.pdf
and
http://www.asahi-kasei.co.jp/akm/en/product/ak4203/akd4203-a0-01e.pdf
The Links: DDB6U205N16L LJ640U48
