My Inquiry
My Account
Renesas ISL22102IR20Z-TK
- Part No.:
- ISL22102IR20Z-TK
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
ISL22102IR20Z-TK.pdf
- Description:
- IC DGT POT 18.5KOHM 32TAP 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,821
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL22102IR20Z-TK from Intersil is a dual-channel, 32-tap logarithmic digital potentiometer with buffered wiper outputs, integrated zero-crossing detection, audio activity flag, and programmable standby control-designed for stereo volume control in consumer audio systems operating from 2.7V to 5.5V supply rails.
For engineers reviewing the ISL22102IR20Z-TK datasheet, ISL22102IR20Z-TK pinout, ISL22102IR20Z-TK application, or ISL22102IR20Z-TK equivalent, key selection criteria include its -72dB to 0dB logarithmic attenuation range, -90dB mute capability, ±0.1dB channel matching, 100kHz -3dB bandwidth, and QFN-20 package with VB reference output and audio-detection delay programming via D0–D2 pins.
Technical Context
The ISL22102IR20Z-TK integrates two independent 31-resistor logarithmic arrays (32 tap positions), each with buffered unity-gain op-amp outputs referenced to an internal AVCC/2 bias voltage (VB). Wiper position is controlled by debounced UP/DN push-button inputs with auto-increment after 1s hold time and zero-amplitude switching (ZAWS) to eliminate pop/click noise.
Its audio detection block monitors LEFT_IN/RIGHT_IN signals against a user-set threshold (VTH) and asserts FLAG high on activity; D0–D2 configure up to 240s delay before FLAG goes low when audio ceases. Standby mode (SB) disconnects DCP arrays and reduces analog current to 360µA while preserving wiper state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Total Resistance | 18.5kΩ per channel - sets full-scale attenuation range and input impedance matching for line-level audio sources. |
| Volume Range | -72dB to 0dB - logarithmic taper matches human loudness perception for smooth stereo volume control. |
| Mute Attenuation | -90dB - fully suppresses audible output without signal path disconnection, enabling silent muting. |
| SNR / THD+N | -90dB SNR, 0.01% THD+N @ 1kHz - ensures high-fidelity audio signal integrity across all tap positions. |
| Crosstalk Rejection | -100dB @ 1kHz - prevents left/right channel leakage, critical for stereo imaging fidelity. |
| Supply Range | VCC & AVCC = 2.7V to 5.5V - supports single-supply operation in portable and mains-powered audio devices. |
| Temp Range | -40°C to +85°C - qualified for industrial-grade embedded audio applications including set-top boxes and amplifiers. |
| Package | 20-lead QFN (4mm × 4mm, L20.4x4C) - compact footprint with exposed pad for thermal management in space-constrained PCBs. |
Pinout & Package
ISL22102IR20Z-TK uses a 20-lead QFN package (4mm × 4mm, L20.4x4C) with exposed thermal pad internally connected to GND. Pin numbering follows top-view orientation with Pin 1 at top-left corner adjacent to index area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| UP (Pin 20) | Active-low wiper increment input | Debounced push-button interface; initiates single or auto-increment (4Hz → 8Hz) wiper movement with ZAWS timing. |
| DN (Pin 1) | Active-low wiper decrement input | Debounced push-button interface; decrements wiper position with same timing and zero-crossing logic as UP. |
| MUTE (Pin 2) | Active-low mute command input | One pulse moves both wipers to -90dB; second pulse restores prior position-enables silent toggle muting. |
| SB (Pin 4) | Active-low standby enable | Disconnects DCP arrays from inputs, sets wipers near VB, and reduces analog supply current to 360µA. |
| FLAG (Pin 18) | Audio activity status output | High when either channel exceeds VTH; delay before low assertion programmable via D0–D2 (0–240s). |
| D0–D2 (Pins 15–17) | Delay configuration inputs | 3-bit binary code selects FLAG low-delay interval; enables adaptive power management based on audio silence duration. |
| LEFT_IN / RIGHT_IN (Pins 5, 10) | Analog signal inputs | Referenced to VB (AVCC/2); accept ±AVCC/2 differential swing-compatible with AC-coupled line-level audio. |
| LEFT_OUT / RIGHT_OUT (Pins 6, 9) | Buffered wiper outputs | Unity-gain, low-impedance (25Ω) outputs referenced to VB-drive power amplifier inputs directly without external buffering. |
| VB (Pin 8) | Internal bias reference | Stable AVCC/2 voltage (±50mV accuracy) used as common-mode reference for audio signals and system-level biasing. |
| VCC / AVCC (Pins 3, 4) | Digital/analog supplies | Separate 2.7V–5.5V rails isolate logic noise from analog path; AVCC powers DCP arrays and buffers. |
| GND (Pin 13) | System ground | Common return for analog and digital supplies; EPAD must be connected to GND plane for thermal performance. |
| CB (Pin 7) | Bypass capacitor terminal | Connects external 1µF–10µF capacitor to GND to set PSRR and stabilize VB output against supply ripple. |
| VTH (Pin 14) | Audio detection threshold input | Accepts external resistor to VB to set detection sensitivity (e.g., 100kΩ → 1mV threshold); max RTH depends on AVCC. |
| HPA / HPB (Pins 11, 12) | High-pass filter terminals | Require ≥100nF capacitor between them to form audio-detection high-pass filter-rejects DC and sub-audio artifacts. |
Key Features
| Feature | Design Value |
|---|---|
| Logarithmic 32-tap DCP array | Matches human auditory response with precise -2dB/-4dB step sizes (taps 0–26) and calibrated channel-to-channel variation (±0.1dB). |
| Zero Amplitude Wiper Switching (ZAWS) | Waits ≤32ms for zero-crossing before tap transition-eliminates audible click/pop during volume changes. |
| Programmable audio-detection delay | D0–D2 select 8 delay intervals (0–240s) before FLAG goes low-enables intelligent power-down after sustained silence. |
| Integrated VB reference generator | Provides stable AVCC/2 (±50mV) bias for audio inputs and external circuitry-reduces BOM count and layout complexity. |
| Auto-increment/decrement on long press | After 1s button hold, wipers move at 4Hz (first 4s), then 8Hz-enables rapid coarse adjustment without multiple presses. |
| Standby mode with state retention | SB input disables DCP arrays and cuts analog current to 360µA while preserving last wiper position-ideal for battery-powered devices. |
Applications
| Set Top Boxes | Stereo Amplifiers |
|---|---|
|
Use Scenario: Volume and mute control for HDMI/AV audio outputs in cable/satellite receivers. IC Role / Device Role / Timing Role: Dual-channel logarithmic DCP with buffered outputs replaces mechanical pots and discrete switches. Use Value: Eliminates mechanical wear, enables remote-controlled volume ramping, and provides -90dB mute without relay insertion loss. |
Use Scenario: Precision left/right channel balancing and master volume control in Class AB/D home audio amplifiers. IC Role / Device Role / Timing Role: Audio-grade DCP with VB reference and crosstalk rejection maintains channel separation and signal integrity. Use Value: Achieves ±0.1dB channel matching and -100dB crosstalk-preserves stereo imaging and dynamic range across full attenuation range. |
| DVD Players | Portable Audio Products |
|
Use Scenario: Analog audio output conditioning for legacy RCA/3.5mm headphone jacks in optical disc players. IC Role / Device Role / Timing Role: Low-noise DCP with ZAWS and mute function manages analog line-out signals before DAC or amplifier stages. Use Value: Delivers -90dB SNR and 0.01% THD+N-meets consumer audio fidelity requirements without external op-amps. |
Use Scenario: Battery-efficient volume control in Bluetooth speakers, portable DACs, and USB-C audio adapters. IC Role / Device Role / Timing Role: Dual DCP with standby mode and audio-detection FLAG enables automatic sleep/wake based on playback activity. Use Value: Reduces quiescent current to 360µA in standby and extends runtime using programmable 240s silence timeout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel audio potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX5482ETE+ | Single 256-tap linear DCP; no audio detection, no VB reference, no ZAWS; operates at 2.7V–5.25V. | Lacks logarithmic taper, mute, and zero-crossing switching-requires external circuitry for pop-free audio control. | Select when linear taper suffices and system already provides bias/reference; not drop-in for ISL22102IR20Z-TK's audio-optimized features. |
| AD5204BRUZ10 | Quad 256-tap linear DCP; no audio-specific features; 2.7V–5.5V; SPI interface instead of push-button control. | Requires microcontroller firmware for volume control; no integrated mute, standby, or audio detection logic. | Choose for digitally managed multi-channel systems where SPI configurability outweighs analog simplicity and audio-optimized timing. |
Compared with MAX5482ETE+ and AD5204BRUZ10, the ISL22102IR20Z-TK delivers purpose-built audio functionality-including logarithmic taper, ZAWS, mute, VB reference, and FLAG-driven power management-in a push-button–controlled QFN package, eliminating firmware dependencies and external components required by alternatives.
Availability
ISL22102IR20Z-TK is available at Aetrix Electronics and suitable for set-top boxes, stereo amplifiers, and portable audio products requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL22102IR20Z-TK includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Intersil Corporation is a precision analog and power management semiconductor provider, now part of Renesas Electronics, with expertise in high-fidelity audio, industrial sensing, and energy-efficient power conversion.
The ISL22102IR20Z-TK belongs to Intersil's audio interface product line, engineered specifically for noise-sensitive consumer audio applications requiring mechanical-pot replacement with enhanced reliability, pop-free operation, and intelligent power management.
FAQ
What is the default wiper position at power-up for the ISL22102IR20Z-TK?
The ISL22102IR20Z-TK resets both wipers to tap position 10 (-20dB attenuation) upon power-up. This default setting provides moderate volume reduction and avoids full-scale output that could cause clipping or speaker damage during initialization. The reset behavior is internal and requires no external configuration.
How does the zero-amplitude wiper switching (ZAWS) feature work in the ISL22102IR20Z-TK?
The ISL22102IR20Z-TK monitors LEFT_IN and RIGHT_IN for zero crossings before executing UP/DN/MUTE commands. If a crossing occurs within 32ms, the wiper moves immediately; otherwise, it moves at the 32ms timeout. This eliminates audible clicks during volume transitions by ensuring switching occurs only at signal null points-critical for high-fidelity audio systems.
Can the ISL22102IR20Z-TK operate with separate analog and digital supply voltages?
Yes-the ISL22102IR20Z-TK supports independent VCC (digital logic) and AVCC (analog DCP/buffer) supplies, both rated 2.7V to 5.5V. This separation minimizes digital noise coupling into the audio path. The VB reference is derived solely from AVCC, ensuring analog stability regardless of VCC fluctuations.
What is the role of the CB pin on the ISL22102IR20Z-TK, and what capacitor value is recommended?
The CB pin connects to an external capacitor (1µF–10µF) to GND, forming a low-pass filter with an internal 5MΩ resistor to improve PSRR and stabilize the VB reference. A 4.7µF X7R ceramic capacitor is commonly used to achieve >90dB PSRR at 1kHz while maintaining low ESR and board space efficiency.
How is audio detection threshold configured on the ISL22102IR20Z-TK?
The ISL22102IR20Z-TK uses the VTH pin with an external resistor to VB to set detection sensitivity. A ±10µA current source at VTH yields threshold = (10µA × RTH)/1000. For example, a 100kΩ resistor gives 1mV threshold. Maximum RTH depends on AVCC (e.g., 188kΩ at 5.5V), as specified in Table 2 of the datasheet.
Does the ISL22102IR20Z-TK support simultaneous left/right channel control, and how is synchronization ensured?
Yes-the ISL22102IR20Z-TK synchronizes left and right wiper movement via shared UP/DN/MUTE inputs. Both channels increment/decrement/mute in lockstep with identical timing (tWRPO = 35ms, tZAWS ≤ 32ms) and matching attenuation steps (±0.1dB channel variation). No external synchronization is needed.
ISL22102IR20Z-TK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- XDCP™
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Taper:
- Logarithmic
- Configuration:
- Potentiometer
- Number of Circuits:
- 2
- Number of Taps:
- 32
- Resistance (Ohms):
- 18.5k
- Interface:
- Pushbutton
- Memory Type:
- Volatile
- Voltage - Supply:
- 2.7V ~ 5.5V
- Features:
- Mute, Zero-Cross Sense
- Tolerance:
- ±20%
- Temperature Coefficient (Typ):
- ±340ppm/°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 20-QFN (4x4)
- Operating Temperature:
- -40°C ~ 85°C
- Resistance - Wiper (Ohms) (Typ):
- -
ISL22102IR20Z-TK FAQ
1.How can I place an order for ISL22102IR20Z-TK through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL22102IR20Z-TK on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ISL22102IR20Z-TK reliable?
The price and inventory of ISL22102IR20Z-TK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL22102IR20Z-TK is usually 5 days.
3.What payment methods are accepted for ISL22102IR20Z-TK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL22102IR20Z-TK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL22102IR20Z-TK?
ISL22102IR20Z-TK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL22102IR20Z-TK order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ISL22102IR20Z-TK?
For technical support, including ISL22102IR20Z-TK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL22102IR20Z-TK requirements.
6.How does Aetrix verify that ISL22102IR20Z-TK is sourced from the original manufacturer or authorized distributors?
All ISL22102IR20Z-TK products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ISL22102IR20Z-TK meets industry standards.
7.What is the process for return or replacement of ISL22102IR20Z-TK?
All ISL22102IR20Z-TK units undergo pre-shipment inspection (PSI). If there is an issue with ISL22102IR20Z-TK, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ISL22102IR20Z-TK part is unused and in its original packaging.
Return procedure for ISL22102IR20Z-TK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL22102IR20Z-TK Tags
-
MCP4018T-103E/LT
Microchip Technology
-
MCP4018T-503E/LT
Microchip Technology
-
MCP4011T-103E/SN
Microchip Technology
-
MCP4018T-104E/LT
Microchip Technology
-
MCP4017T-503E/LT
Microchip Technology
-
MCP4018T-502E/LT
Microchip Technology
-
MCP4017T-103E/LT
Microchip Technology
-
MCP4531T-103E/MF
Microchip Technology
-
MCP4021T-202E/SN
Microchip Technology
-
MCP4023T-103E/CH
Microchip Technology
-
MCP4022T-503E/CH
Microchip Technology
-
MCP4551T-502E/MS
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
