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Diodes Incorporated PI3A288ZMEX
- Part No.:
- PI3A288ZMEX
- Manufacturer:
- Diodes Incorporated
- Package:
- 10-UFQFN
- Datasheet:
-
PI3A288ZMEX.pdf
- Description:
- IC SWITCH SPDTX2 350MOHM 10UQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,653
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Product details
Overview
PI3A288ZMEX from Diodes Incorporated is a dual SPDT analog switch with negative signal handling capability, ultra-low THD (0.0003% at 20Hz–20kHz), 0.35Ω on-resistance at 1.8V, and 255MHz -3dB bandwidth. It operates from 1.65V to 4.3V, supports ±2.0Vrms analog swing below/above ground, and integrates programmable soft-start/stop for click-and-pop suppression in audio routing.
For engineers reviewing the PI3A288ZMEX datasheet, PI3A288ZMEX pinout, PI3A288ZMEX application, or PI3A288ZMEX equivalent, key selection criteria include THD performance, rail-to-rail signal handling, slew-rate controllability via SSCAP, and UQFN-10 package compatibility with high-density portable audio PCB layouts.
Technical Context
The PI3A288ZMEX implements a CMOS-based dual SPDT topology enabling bidirectional analog signal routing with true beyond-the-rails operation: signals from –2.5V to +2.5V pass without distortion even when VDD = 1.8V. Its low on-resistance flatness (0.001Ω) ensures minimal harmonic generation across full signal swing.
Soft-start/stop timing is externally controlled by an RC network on the SSCAP pin (e.g., 0.01µF yields 5ms ramp time), directly mitigating voltage transients during channel switching. High off-isolation (–85dB @ 30kHz) and crosstalk rejection (–85dB @ 30kHz) are achieved through optimized channel separation and guard-ring layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance | 0.35Ω at 1.8V - enables low insertion loss & minimal power dissipation in battery-powered audio paths |
| THD+N | –110dB (0.0003%) at 0.5VRMS, 20Hz–20kHz - preserves fidelity in high-end headset and speaker switching |
| –3dB Bandwidth | 255MHz - supports wideband video and fast digital bus switching without signal degradation |
| Analog Signal Range | ±2.0Vrms at VDD ≤ 2.3V - allows direct coupling of ground-referenced audio drivers without DC-blocking capacitors |
| Off-Isolation | –85dB @ 30kHz - prevents audible leakage between active and muted audio channels |
| Supply Voltage Range | 1.65V to 4.3V - compatible with Li-ion, USB, and multi-rail embedded systems without level-shifting |
| ESD Protection | 4kV HBM / 1kV CDM - meets IEC 61000-4-2 system-level robustness requirements for handheld interfaces |
Pinout & Package
Package: 10-contact Ultra-thin Quad Flat No-Lead (UQFN), 1.6mm × 2.1mm × 0.55mm body, ZM10 footprint per Diodes Inc. mechanical drawing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3 | NO1, NO2 (Normally Open) | Analog input ports connected to COMx only when IN = HIGH; enable channel selection without signal interruption |
| 2, 10 | NC1, NC2 (Normally Closed) | Analog input ports connected to COMx only when IN = LOW; provides default path for fail-safe mute or standby routing |
| 5, 8 | COM1, COM2 (Common Outputs) | Bidirectional analog output nodes; support simultaneous routing of stereo audio or differential video signals |
| 4 | GND | Signal and power reference plane; must be low-inductance connected to PCB ground pour for THD integrity |
| 9 | VDD | Positive supply input; powers internal logic and switch FETs; decoupling capacitor required within 2mm |
| 7 | IN | Digital control input; TTL/CMOS-compatible (VIH = 1.4V, VIL = 0.325V); accepts up to 4.3V regardless of VDD |
| 6 | SSCAP | Slew-rate control terminal; external 0.01µF capacitor sets 5ms soft-start/stop time to eliminate click/pop noise |
Key Features
| Feature | Design Value |
|---|---|
| Negative signal handling | Supports analog inputs down to –2.5V with no external negative supply - eliminates need for charge pumps in portable audio |
| Ultra-low THD+N | –110dB at 0.5VRMS - meets Hi-Fi audio specifications for smartphone DAC output switching and headset jack multiplexing |
| Programmable soft-start | RC-timed ramp (5ms typical with 0.01µF) - suppresses transient-induced clicks during speaker/headphone channel switching |
| High off-isolation & crosstalk rejection | –85dB at 30kHz - prevents audible bleed between left/right stereo channels or audio/video signal paths |
| Low on-resistance flatness | 0.001Ω variation over ±2.5V COM swing - maintains consistent gain and phase response across full audio band |
Applications
| Smartphone Audio Routing | USB-C Audio Adapter Switching |
|---|---|
|
Use Scenario: Dynamic switching between built-in speaker, 3.5mm headset, and USB-C digital audio output in compact smartphones. IC Role / Device Role / Timing Role: Dual SPDT analog switch managing stereo audio paths under GPIO control; soft-start prevents pop noise during jack detection events. Use Value: Eliminates DC-blocking capacitors and reduces BOM count by 4× per channel while maintaining <0.001% THD at 1.8V supply. |
Use Scenario: Multiplexing analog audio signals from legacy 3.5mm TRRS jacks into USB-C receptacles supporting analog accessory mode. IC Role / Device Role / Timing Role: Rail-to-rail analog switch enabling ±2.0Vrms signal pass-through without level shifters; handles ground-referenced microphone bias. Use Value: Supports simultaneous mic/line-in and stereo-out routing in sub-5mm-thick dongles with <100µA quiescent current. |
| Portable Medical Instrumentation | Industrial Sensor Signal Conditioning |
|
Use Scenario: Isolating ECG electrode inputs during lead-off detection and routing biopotential signals to ADC front-ends. IC Role / Device Role / Timing Role: Low-noise analog switch providing >85dB channel isolation and <0.35Ω on-resistance for minimal signal attenuation. Use Value: Enables DC-coupled acquisition of sub-mV bio-signals with no added harmonic distortion or baseline shift during multiplexing. |
Use Scenario: Selecting between multiple analog sensor outputs (thermocouple, RTD, strain gauge) before feeding a precision SAR ADC. IC Role / Device Role / Timing Role: High-impedance analog switch with <14pF off-capacitance and <35pF on-capacitance to minimize settling time errors. Use Value: Reduces channel-to-channel crosstalk to <–85dB, allowing 16-bit ADC resolution retention across 8:1 multiplexed sensor arrays. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual SPDT analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TSM1021ILT | Higher on-resistance (0.8Ω @ 3.3V), no negative signal handling, no soft-start control | Limited to single-supply audio above GND; unsuitable for ground-referenced drivers or click-free switching | Select when cost sensitivity outweighs THD and rail-to-rail requirements; verify signal swing stays within 0V to VDD |
| MAX4677ETA+ | Wider supply range (1.8V–5.5V), but higher THD (–95dB), no SSCAP pin, fixed 100ns turn-on | Acceptable for non-audio analog muxing; lacks soft-start for audio muting or jack insertion events | Prefer for industrial analog multiplexing where speed > fidelity; avoid in consumer audio due to audible switching artifacts |
Compared with TSM1021ILT and MAX4677ETA+, the PI3A288ZMEX uniquely delivers sub-0.001% THD, programmable soft-start, and true negative-swing capability - making it the only choice for space-constrained, high-fidelity audio routing requiring zero DC-blocking components.
Availability
PI3A288ZMEX is available at Aetrix Electronics and suitable for smartphone audio routing, USB-C analog adapter design, and portable medical instrumentation requiring stable component supply, RoHS-compliant packaging, and extended temperature operation (–40°C to +85°C).
Supply support for PI3A288ZMEX 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-performance signal integrity, power management, and protection solutions for consumer, industrial, and automotive markets.
The PI3A288ZMEX belongs to Diodes' Pericom® analog switch portfolio, engineered specifically for ultra-low-distortion audio and high-bandwidth signal routing in space-constrained portable electronics.
FAQ
What is the maximum analog signal voltage the PI3A288ZMEX can handle without distortion?
The PI3A288ZMEX supports ±2.0Vrms analog signals when VDD ≤ 2.3V and ±1.8Vrms when VDD > 2.3V. Its Beyond-the-Rails architecture allows input signals from –2.5V to +2.5V relative to GND without clipping or distortion, verified per DS41712 Figure 1 and Table 1.
How does the SSCAP pin affect audio switching performance?
The SSCAP pin controls soft-start/stop slew rate via an external capacitor: a 0.01µF capacitor yields 5ms ramp time, eliminating audible click/pop during channel transitions. This is measured per DS41712 Figures 10–11 and validated in Typical Application Circuit (Figure 12).
Can the PI3A288ZMEX operate with a 1.65V supply while maintaining full analog signal range?
Yes - at VDD = 1.65V, the device maintains full ±2.0Vrms analog signal handling and achieves 0.35Ω on-resistance (typical), as confirmed in DS41712 Electrical Characteristics Table (VDD = 1.65V row) and Analog Signal Range specification.
Is the PI3A288ZMEX pin-compatible with other UQFN-10 analog switches?
No - the PI3A288ZMEX has a unique pinout (e.g., SSCAP on Pin 6, dual IN on Pin 7) not shared by standard UQFN-10 analog switches like the TS5A23157 or ADG821. Layout redesign is required for substitution; refer to DS41712 Pin Description table for exact mapping.
PI3A288ZMEX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Switch Circuit:
- SPDT
- Multiplexer/Demultiplexer Circuit:
- 2:1
- Number of Circuits:
- 2
- On-State Resistance (Max):
- 350mOhm (Typ)
- Channel-to-Channel Matching (ΔRon):
- 5mOhm
- Voltage - Supply, Single (V+):
- 1.65V ~ 4.3V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 270µs, 65µs (Typ)
- -3db Bandwidth:
- 25MHz
- Charge Injection:
- -
- Channel Capacitance (CS(off), CD(off)):
- 6pF
- Current - Leakage (IS(off)) (Max):
- -
- Crosstalk:
- -85dB @ 30kHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-UQFN (1.8x1.4)
PI3A288ZMEX FAQ
1.How can I place an order for PI3A288ZMEX through Aetrix?
Please submit a Request for Quotation (RFQ) for PI3A288ZMEX 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 PI3A288ZMEX reliable?
The price and inventory of PI3A288ZMEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI3A288ZMEX is usually 5 days.
3.What payment methods are accepted for PI3A288ZMEX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI3A288ZMEX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI3A288ZMEX?
PI3A288ZMEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI3A288ZMEX 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 PI3A288ZMEX?
For technical support, including PI3A288ZMEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI3A288ZMEX requirements.
6.How does Aetrix verify that PI3A288ZMEX is sourced from the original manufacturer or authorized distributors?
All PI3A288ZMEX 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 PI3A288ZMEX meets industry standards.
7.What is the process for return or replacement of PI3A288ZMEX?
All PI3A288ZMEX units undergo pre-shipment inspection (PSI). If there is an issue with PI3A288ZMEX, 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 PI3A288ZMEX part is unused and in its original packaging.
Return procedure for PI3A288ZMEX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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