Overview
Description
The ISL22102IR20Z-EVAL evaluation board is used to evaluate the ISL22102 32-tap, push-button, dual audio logarithmic potentiometer with buffer amplifiers and audio detection (XDCP™).
The ISL22102 integrates two digitally controlled potentiometers (DCP) with buffered wiper outputs and an internal bias voltage generator (VB) on a monolithic CMOS integrated circuit. The wiper position is adjusted by the user through simple Up and Down push buttons, ideal for stereo volume control in audio applications.
Each potentiometer is implemented using 31 polysilicon resistors in a logarithmic array. Between each of the resistors are tap points connected to the wiper terminal through switches. When powered up, the wipers are reset to the -20dB position.
Features
- Dual audio control – two 32-tap log pots
- Buffered wiper outputs
- Audio detection with threshold input and controlled delay
- Zero amplitude wiper switching (ZAWS)
- Simple push-button interface
- Auto increment/decrement after 1s button press
- Standby mode
- Mute function
- Total resistance: 18.5kΩ each DCP (Typical)
- Voltage operation
- VCC = 2.7V to 5.5V
- AVCC = 2.7V to 5.5V
- Temp Range = -40°C to +85°C
- Pb-free (RoHS compliant)
Applications
Documentation
Log in required to subscribe
|
|
|
|
|---|---|---|
| Type | Title | Date |
| PCB Design Files | ZIP 21.07 MB | |
| Application Note |
PDF
251 KB
AI-generated Summary:
This document outlines important legal disclaimers and usage guidelines for semiconductor products. It emphasizes user responsibility for product design, disclaims liability for damages, and prohibits unauthorized modifications or reverse engineering. Products are categorized by quality grades with specific application recommendations. Users must comply with safety, environmental, and export regulations. Renesas disclaims warranties and liability for improper use or noncompliance. Contact information for global sales offices is provided.
|
|
| Application Note |
PDF
381 KB
AI-generated Summary:
Dual audio potentiometers reduce component count and power consumption in consumer audio devices by integrating multiple functions into a single unit. The BOM savings compared to discrete solutions include fewer resistors, capacitors, FETs, op-amps, and diodes across sub-circuits such as Vcc/2 bias, volume control, buffer amps, audio detect, and standby. Renesas provides global sales offices and emphasizes compliance with legal, safety, and environmental standards.
|
|
| Application Note |
PDF
503 KB
AI-generated Summary:
Effective Number of Bits (ENOB) depends critically on precise coherence in A/D sampling, with small frequency shifts significantly impacting accuracy. Unwrapping reconstructs coherently sampled sine waves, while windowing controls spectral leakage by shaping the acquisition window. Resampling and interpolation adjust sample sets to avoid leakage in FFT analysis. Different window functions balance side lobe levels and bandwidth, affecting spectral resolution and leakage reduction.
|
|
| Application Note |
PDF
287 KB
AI-generated Summary:
Coherent sampling requires the ratio of signal frequency to sampling frequency to be a rational number, expressed as ko/N. When this condition is not met, frequency smearing occurs across bins. Data Acquisition Systems (DAS) can mitigate this by windowing, fixing sampling frequency and tuning input frequency, or fixing input frequency and tuning sampling frequency. The latter two methods are practical for most systems. Pseudo-code illustrates the frequency response for non-integer ko values.
|
|
5 items
|
||
Design & Development
Product Options
| Part Number | Status | Stock | Sampleable | Pb (Lead) Free | ECCN (US) | HTS (US) |
|---|---|---|---|---|---|---|
| ISL22102IR20Z-EVAL | Obsolete | Out of Stock | N/A | No | EAR99 | 8473.30.1180 |
Support
Support Communities
Get quick technical support online from Renesas Engineering Community technical staff.
Knowledge Base
Browse our knowledge base for helpful articles, FAQs, and other useful resources.
