My Inquiry
My Account
Renesas ISL22102IR20Z
- Part No.:
- ISL22102IR20Z
- Manufacturer:
- Renesas
- Category:
- Digital Potentiometers
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
ISL22102IR20Z.pdf
- Description:
- IC DGT POT 18.5KOHM 32TAP 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,946
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL22102IR20Z from Intersil is a dual 32-tap logarithmic digital potentiometer IC with buffered wiper outputs, 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 datasheet, ISL22102IR20Z pinout, ISL22102IR20Z application, or ISL22102IR20Z 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 integrates two independent 31-resistor logarithmic arrays with digitally controlled wiper switches, each referenced to an internal AVCC/2 bias voltage (VB) and buffered by unity-gain op-amps. Wiper position is adjusted via debounced UP/DN push-button inputs with auto-increment after 1s hold time.
It implements zero-amplitude wiper switching (ZAWS) with 32ms detection latency, audio threshold detection using external RTH on VTH, and FLAG output delay programmable from 0 to 240s via D0–D2. Standby mode disconnects DCP arrays and reduces analog current to 360µA at AVCC = 5.5V.
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 - provides 32 discrete logarithmic steps matching human loudness perception for smooth volume transitions. |
| Mute Attenuation | -90dB - fully suppresses audio output without requiring external muting circuitry or relays. |
| SNR / THD+N | -90dB SNR, 0.01% THD+N @ 1kHz - ensures high-fidelity signal path suitable for CD-quality audio playback. |
| Crosstalk Rejection | -100dB @ 1kHz - prevents left/right channel leakage critical for stereo imaging integrity. |
| Supply Range | VCC & AVCC: 2.7V to 5.5V - enables direct compatibility with 3.3V and 5V system rails without level-shifting. |
| Temp Range | -40°C to +85°C - supports operation in set-top boxes, portable audio, and automotive infotainment enclosures. |
Pinout & Package
ISL22102IR20Z is housed in a 20-lead QFN package (4mm × 4mm, L20.4x4C), thermally enhanced with exposed die pad connected internally 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 / DN | Active-low push-button interface | Debounced digital inputs with internal 2µA pull-up; initiate wiper increment/decrement with ZAWS timing. |
| LEFT_IN / RIGHT_IN | Analog signal inputs | Referenced to VB (AVCC/2); accept ±AVCC/2 amplitude signals-no DC blocking required. |
| LEFT_OUT / RIGHT_OUT | Buffered wiper outputs | Unity-gain buffered outputs referenced to GND; drive power amplifier inputs directly. |
| VB | Internal bias reference | Stable AVCC/2 output (±50mV accuracy); serves as common-mode reference for audio paths and external circuitry. |
| FLAG / SB / D0–D2 | Audio detection & control | FLAG asserts HIGH when audio exceeds VTH; D0–D2 program 0–240s delay before FLAG goes LOW; SB enables automatic standby. |
| VCC / AVCC / GND | Power domains | Digital (VCC) and analog (AVCC) supplies are separate but identical (2.7–5.5V); shared GND simplifies layout. |
| HPA / HPB / CB / VTH | Filter & threshold configuration | External RC networks set high-pass cutoff (HPA/HPB), PSRR enhancement (CB), and audio detection threshold (VTH + RTH). |
Key Features
| Feature | Design Value |
|---|---|
| Zero-Crossing Switching (ZAWS) | Wiper moves only at signal zero-crossing points (≤32ms latency), eliminating audible click/pop during volume changes. |
| Programmable Audio Detection Delay | D0–D2 pins configure FLAG low-delay from 0 to 240s-enables adaptive power management based on sustained audio silence. |
| Integrated VB Reference Generator | Provides precise AVCC/2 bias (±50mV) for AC-coupled audio paths, reducing need for external resistive dividers or op-amps. |
| Auto-Increment Volume Control | Holding UP/DN >1s triggers 4Hz then 8Hz stepping-enables rapid coarse adjustment without multiple button presses. |
| Channel-to-Channel Matching | ±0.1dB attenuation matching across 32 taps ensures consistent stereo balance at all volume levels. |
Applications
| Set-Top Box Audio Control | Stereo Amplifier Volume |
|---|---|
Use Scenario: Volume and mute control for HDMI/SPDIF audio outputs in cable/satellite receivers with remote IR interface. IC Role / Device Role / Timing Role: Dual-channel logarithmic DCP replaces mechanical pots; VB reference eliminates coupling capacitors; FLAG triggers system sleep on audio silence. Use Value: Enables compact PCB layout, eliminates mechanical wear, and supports automated power-down via programmable 240s audio timeout. | Use Scenario: Main volume control in integrated stereo amplifiers with front-panel push buttons and LED indicators. IC Role / Device Role / Timing Role: Buffers audio signals while providing precise logarithmic taper; ZAWS prevents pop noise during manual adjustment; MUTE pin enables instant channel muting. Use Value: Delivers audiophile-grade SNR (-90dB) and crosstalk rejection (-100dB), ensuring clean left/right separation without external op-amps. |
| DVD/Blu-ray Player Audio | Portable Audio Docking Station |
Use Scenario: Analog audio output stage in disc players supporting composite RCA and headphone outputs. IC Role / Device Role / Timing Role: Dual DCP handles main L/R line-out and headphone driver paths; CB capacitor optimizes PSRR for battery-powered operation. Use Value: -72dB dynamic range and ±0.1dB channel matching preserve wide-volume listening fidelity across both output types. | Use Scenario: Volume control and auto-sleep in USB/Bluetooth docking stations for smartphones and tablets. IC Role / Device Role / Timing Role: FLAG output drives microcontroller GPIO; D0–D2 configured for 120s delay; SB pin links to system PMIC for full subsystem shutdown. Use Value: Reduces quiescent current to 360µA in standby, extending battery life without compromising wake-on-audio responsiveness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual logarithmic potentiometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX5488ETE+ | Single-channel, 32-tap, no audio detection or VB generator; requires external reference and mute logic. | Lacks FLAG/SB integration and auto-standby; suited for non-audio or space-constrained single-channel designs. | Select when only one channel is needed and system-level audio monitoring already exists. |
| AD5204BRUZ10 | Quad 64-tap linear DCP; no ZAWS, no VB, no audio-specific features; ±20% resistance tolerance. | Requires external op-amps for buffering and external circuitry for mute/logarithmic response; higher channel count but lower audio fidelity. | Choose for multi-channel gain control where logarithmic taper and click suppression are not required. |
Compared with MAX5488ETE+ and AD5204BRUZ10, the ISL22102IR20Z uniquely combines dual-channel logarithmic taper, integrated VB reference, zero-crossing switching, and programmable audio-aware standby-reducing BOM count and PCB area in consumer audio volume control applications.
Availability
ISL22102IR20Z is available at Aetrix Electronics and suitable for set-top boxes, stereo amplifiers, DVD players, and portable audio products requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for ISL22102IR20Z 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 company, now part of Renesas Electronics, delivering high-performance solutions for industrial, computing, and consumer markets.
The ISL22102IR20Z belongs to Intersil's audio interface and digitally controlled potentiometer product line, engineered specifically for low-noise, click-free stereo volume control in cost-sensitive consumer electronics.
FAQ
What is the default wiper position at power-up for the ISL22102IR20Z?
At power-up, the ISL22102IR20Z resets both wipers to tap position 10, corresponding to -20dB attenuation. This default setting ensures moderate volume level on startup and is defined in the device's internal reset logic-not configurable via external pins or registers.
Does the ISL22102IR20Z require external passive components to operate?
Yes-the ISL22102IR20Z requires external components for full functionality: a resistor between VTH and VB sets audio detection threshold; a capacitor from CB to GND improves PSRR; and 100nF capacitors between HPA–HPB enable high-pass filtering. These are mandatory for audio detection and optimal noise performance.
How does the MUTE function work on the ISL22102IR20Z?
The ISL22102IR20Z MUTE pin is active-low. A single pulse moves both wipers to -90dB attenuation (tap 32). A second pulse restores the previous wiper positions. Internal debounce and zero-crossing detection prevent audible artifacts during mute/unmute transitions.
Can the ISL22102IR20Z be used with a single 3.3V supply?
Yes-the ISL22102IR20Z operates with VCC and AVCC independently rated from 2.7V to 5.5V. Using a single 3.3V rail for both supplies is fully supported and commonly implemented in portable audio designs, maintaining full -72dB range and -90dB mute performance.
What is the purpose of the VB pin on the ISL22102IR20Z?
The VB pin on the ISL22102IR20Z delivers a precise AVCC/2 reference voltage (±50mV accuracy) used as the common-mode point for LEFT_IN/RIGHT_IN and LEFT_OUT/RIGHT_OUT signals. It eliminates the need for external biasing networks and enables true AC-coupled audio paths without DC offset errors.
ISL22102IR20Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- XDCP™
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Tube
- 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 FAQ
1.How can I place an order for ISL22102IR20Z through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL22102IR20Z 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 reliable?
The price and inventory of ISL22102IR20Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL22102IR20Z is usually 5 days.
3.What payment methods are accepted for ISL22102IR20Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL22102IR20Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL22102IR20Z?
ISL22102IR20Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL22102IR20Z 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?
For technical support, including ISL22102IR20Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL22102IR20Z requirements.
6.How does Aetrix verify that ISL22102IR20Z is sourced from the original manufacturer or authorized distributors?
All ISL22102IR20Z 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 meets industry standards.
7.What is the process for return or replacement of ISL22102IR20Z?
All ISL22102IR20Z units undergo pre-shipment inspection (PSI). If there is an issue with ISL22102IR20Z, 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 part is unused and in its original packaging.
Return procedure for ISL22102IR20Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL22102IR20Z 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…
