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PT2399 Delay Echo Processor IC: Datasheet, Schematic and Circuit

Q: What do pin 15 and 16 do in a pt2399 circuit?

Pin 15 and pin 16 to form a capacitance by changing the external resistance to change the input frequency response of the inverting amplifier, as the signal input.

Q: What is the use of PT2399?

The PT2399 is a single chip echo processor IC utilizing CMOS technology. Which accept analog audio input signal, a high sample rate ADC transfer the analog signal into a bitstream then storage to internal 44Kbit RAM, after processing the bitstream will de-modulate by DAC and low pass filter.

Q: How does a PT2399 work?

In the PT2399, digitization is only used to delay the signal, nothing else! The small DSP in the PT2399 stores only a sample of the sound in memory for a few milliseconds. Then it plays it back later without any sound processing added. Then, all the sound processing is done with a 100% analog circuit.

UTMEL

Published: 04 November 2021 | Last Updated: 04 November 2021

32209

PT2399

PTC(Princeton Tech)

PT2399 datasheet pdf and Unclassified product details from PTC(Princeton Tech) stock available at Utmel

Purchase Guide

PT2399 is a digital delay echo audio processor. This article mainly covers pinout, datasheet, applications, circuit, and other details about PT2399 delay. Furthermore, there is a huge range of semiconductors, capacitors, resistors, and ICs in stock. Welcome your RFQ!

This video demonstrates how PT2399 delay pedals work.

PT2399 Delay Pedals - How do they work?

Catalog

What is PT2399 Delay?

The PT2399 is a CMOS single-chip echo processor IC. A high sample rate ADC converts the analog data into a bitstream, which is then stored in internal 44Kbit RAM. After processing, the bitstream is de-modulated by DAC and lowpass filter. The internal VCO clock frequency determines the overall delay duration, and the user can easily modify the VCO frequency by changing the external resistance.

pt2399 internal circuit.jpg

PT2399 Pinout

PT2399 Pinout

Pin Number	Pin Name	Description
1	VCC	Supply 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

PT2399 CAD Model

PT2399 symbol.jpg

PT2399 Symbol

PT2399 footprint.jpg

PT2399 Footprint

PT2399 3D Model

PT2399 Block Diagram

PT2399 Block Diagram

PT2399 Features

CMOS technology
Least external components
Auto-reset Function prevent POP noise
Low noise, SNR better than 90dB (typical)
Low distortion, THD= 0.5 %( typical)
User-adjustable VCO clock frequency

PT2399 Applications

KARAOKE Mixer
CD/DVD Player/Recorder
Multimedia TV
Car Entertainment System
Music Instrument effecter
Electronics Toy

PT2399 Application Circuit Schematics

The Delay/Echo circuit described in the datasheet is the most common use for the PT2399; these fundamental circuits are quite similar and serve as the foundations for many additional guitar pedals:

pt2399 application circuit echo.jpg

Echo

pt2399 application circuit delay.jpg

Delay

Alternative for PT2399

BU9253

PT2399 Power

PT2399 Input Stage

Three op-amps make up the Input Stage. The designer cannot use two of them (2 and 3) because they are always employed as part of the Sigma-Delta ADC circuit. The first op-amp can be used in a variety of ways, but the most typical application is as a filter/adder in a Multi-Feedback topology:

pt2399 input.jpg

PT2399 Input

PT2399 Output Stage

Two op-amps make up the output stage. The first has limited usefulness and is used after the Demodulator as a low pass filter (Anti-Aliasing Filter). The second op-amp is unrestricted and is typically used in a Multi-Feedback op-amp filter.

PT2399 output.jpg

PT2399 Output

PT2399 Package Dimensions

PT2399 Package Dimensions

PT2399 Manufacturer

PTC (Princeton Tech) was established in 1986 and was initially deeply involved in the consumer IC field. It has become a leading manufacturer of consumer IC design in Taiwan. Since then, it has entered the automotive IC market and obtained certification and adoption by many well-known manufacturers in the world, which proves that the superior quality of PTC(Princeton Tech) products has been deeply recognized and trusted by customers. PTC(Princeton Tech) has developed mass-produced products, including various display driver ICs, multimedia voice ICs, motor driver ICs, radio frequency ICs, codec ICs, remote control ICs and customized ICs, etc.

Frequently Asked Questions

What do pin 15 and 16 do in a pt2399 circuit?

Pin 15 and pin 16 to form a capacitance by changing the external resistance to change the input frequency response of the inverting amplifier, as the signal input.

What is the use of PT2399?

The PT2399 is a single chip echo processor IC utilizing CMOS technology. Which accept analog audio input signal, a high sample rate ADC transfer the analog signal into a bitstream then storage to internal 44Kbit RAM, after processing the bitstream will de-modulate by DAC and low pass filter.

How does a PT2399 work?

In the PT2399, digitization is only used to delay the signal, nothing else! The small DSP in the PT2399 stores only a sample of the sound in memory for a few milliseconds. Then it plays it back later without any sound processing added. Then, all the sound processing is done with a 100% analog circuit.

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PT2399

PTC(Princeton Tech)

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