PT2399 Digital Delay Echo Audio Processor
ThePT2399is anEcho Processor ICthat is commonly used to provide digital delay in audio circuits. The IC takes in analog audio input and converts it into digital stream of bits to add a digital delay to it. This audio delayed audio signal is then provided as output.
PT2399 Pinout Configuration
Pin Number |
Pin Name |
Description |
1 |
VCC |
年代upply Voltage Input |
2 |
REF |
Analog Reference Voltage Input |
3,4 |
AGND, DGND |
Analog Ground and Digital Ground |
5 |
CLK_O |
Clock Signal Output |
6 |
VCO |
Frequency adjust input pin |
7、8 |
CC1,CC0 |
Current control 1 and Current control 0 |
9,10 |
OP1-OUT,OP1-IN |
1st Op-amp Output and input pin |
11,12 |
OP2-IN, OP2-OUT |
2nd Op-amp Input and Output pin |
13,14 |
LPF2-IN,LPF2-OUT |
2nd Low pass filter input and output pin |
15,16 |
LPF1-OUT,LPF-IN |
1st Low pass filter output and input pin |
Features
- Audio Echo Processor for digital delay
- 年代upply Voltage: 4.5V to 5.5V
- Clock Frequency: 4MHz
- Maximum Voltage gain: 2.5dB
- Power Supply Rejection Ratio: -40dB (typically)
- Available in 16-pin PDIP, GDIP, PDSO packages
Note:Complete Technical Details can be found in thePT2399 datasheet,given at the end of this page.
Alternatives
BU9253
Introduction to PT2399
ThePT2399is anage old Echo Processor ICfrom a manufacturer calledPrinceton. The IC has been extensively used in audio application to create digital delays and other modulations. It can commonly be found in Karaoke mixers and other toys requiring audio modulations. A sample application circuit for the IC is shown below from the datasheet.
The IC is originally from Taiwan (China) and hence most of the passive components (mainly capacitors) used in the application circuit will not available globally. But since the values are not operation sensitive you can try using a close value as possible. The IC works with CMOS technology and claims to have a very low distortion value of less than 0.5%. But still many designers have reported a mild fizzing noise during operation. Irrespective of the drawbacks the IC is still widely used in audio consoles for echo purposes. More details can be found at the datasheet linked at the bottom of this page.
Application
- Audio processing application
- Echo creator
- Karaoke Mixer
- Entertainment/Infotainment system
- Electronics toys