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Analog Devices Inc./Maxim Integrated MAX4731EUA+
- Part No.:
- MAX4731EUA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX4731EUA+.pdf
- Description:
- IC SWITCH SPST-NOX2 25OHM 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:540
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Product details
Overview
The MAX4731EUA+ from Maxim Integrated is a dual, normally open (NO), single-pole/single-throw (SPST) analog switch IC operating from a single +2V to +11V supply. It delivers 50Ω maximum on-resistance at +3V, 0.1nA leakage current at +25°C, and rail-to-rail signal handling - enabling precise low-power signal routing in portable instrumentation and battery-powered audio systems.
For engineers reviewing the MAX4731EUA+ datasheet, MAX4731EUA+ pinout, MAX4731EUA+ application, or MAX4731EUA+ equivalent, this device is selected for ultra-low quiescent power (0.5nW typ), tight on-resistance matching (3.5Ω max at +3V), and compact 8-pin µMAX® packaging - critical for space-constrained, low-leakage analog multiplexing designs.
Technical Context
The MAX4731EUA+ implements two independent CMOS SPST switches with TTL/CMOS-compatible digital control inputs (IN1, IN2), each driving a normally open path between COMx and NOx terminals. Its architecture supports bidirectional analog signal flow across the full supply range (GND to V+), with guaranteed performance over –40°C to +85°C.
It features integrated protection diodes on all analog pins, requires no external biasing, and maintains stable RON flatness (9Ω max at +3V) and low charge injection (7.5pC) - making it suitable for precision data acquisition front-ends and high-fidelity audio switching where signal integrity and minimal transient disturbance are essential.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.0V to +11V - enables direct integration into 3.3V, 5V, and higher-voltage mixed-signal systems without level-shifting. |
| On-Resistance (RON) | 50Ω max at +3V - ensures minimal signal attenuation and gain error in sensor interface and ADC input paths. |
| RON Matching | 3.5Ω max at +3V - guarantees matched channel behavior for differential or ratiometric measurements. |
| Leakage Current | ±0.1nA at +25°C - preserves accuracy in high-impedance circuits (e.g., pH sensors, photodiode amplifiers). |
| Turn-On/Off Time | 170ns / 70ns max at +3V - supports fast multiplexing in multi-channel data loggers up to ~5MHz effective scan rate. |
| Off-Isolation | –72dB at 1MHz - suppresses crosstalk between inactive channels in A/V routing and communication signal paths. |
| Package | 8-pin µMAX® (3.0mm × 3.0mm) - provides PCB area savings vs. SOIC while maintaining hand-solderability and thermal performance. |
Pinout & Package
MAX4731EUA+ uses an 8-pin µMAX® package (JEDEC MO-178AA), with exposed pad connected to GND for thermal and noise performance. Pin 1 is marked by a dot or bevelled corner.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | V+ | Positive supply input - must be bypassed with ≥0.1µF ceramic capacitor near the pin for stability at high supply voltages. |
| 2 | IN1 | Digital control input for Switch 1 - logic-high connects COM1 to NO1; TTL/CMOS compatible at +3V to +5V supplies. |
| 3 | COM2 | Common terminal of Switch 2 - bidirectional analog node; accepts rail-to-rail signals from GND to V+. |
| 4 | NO2 | Normally open terminal of Switch 2 - forms closed path with COM2 only when IN2 = logic-high. |
| 5 | GND | Digital/analog ground reference - connect exposed pad to same plane for optimal EMI immunity and thermal dissipation. |
| 6 | IN2 | Digital control input for Switch 2 - independent of IN1; enables asynchronous switching of dual channels. |
| 7 | COM1 | Common terminal of Switch 1 - primary signal path for first channel; shares no internal coupling with COM2. |
| 8 | NO1 | Normally open terminal of Switch 1 - isolated from COM1 until enabled; supports hot-swap and zero-power standby modes. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent power | 0.5nW typical - extends battery life in always-on monitoring devices beyond 10 years with coin-cell power. |
| Rail-to-rail analog operation | Supports signals from GND to V+ - eliminates need for external level shifters in single-supply data acquisition systems. |
| Tight RON flatness | 9Ω max over full signal range at +3V - minimizes harmonic distortion and amplitude error in audio and sensor signals. |
| Low charge injection | 7.5pC - reduces glitch-induced settling time in precision sample-and-hold and switched-capacitor circuits. |
| High off-isolation | –72dB at 1MHz - prevents signal bleed-through in multi-source A/V matrix applications and RF test equipment. |
Applications
| Portable Medical Sensors | USB-C Audio Adapters |
|---|---|
Use Scenario: Multiplexing ECG, temperature, and SpO₂ sensor outputs into a single ADC channel of a wearable health monitor. IC Role / Device Role / Timing Role: Dual SPST analog switch routing biopotential signals while maintaining sub-μV offset stability and <10nA input bias. Use Value: Enables 3-sensor integration in <10mm² PCB area using 8-pin µMAX®, with leakage-limited accuracy preserved across –40°C to +85°C. |
Use Scenario: Routing analog audio (3.5mm TRRS) and USB-C sideband use (SBU) signals within compact dongles supporting headset + data. IC Role / Device Role / Timing Role: Low-RON, low-crosstalk switch isolating microphone and ground paths during plug insertion detection and mode negotiation. Use Value: Prevents audible pop/noise during hot-plug events via <70ns turn-off and –108dB crosstalk, meeting USB-IF audio adapter compliance. |
| Industrial Data Loggers | Test & Measurement Multiplexers |
Use Scenario: Scanning 16 thermocouple inputs into a single cold-junction-compensated amplifier using external address decoding. IC Role / Device Role / Timing Role: Precision analog switch providing matched RON and <0.1nA leakage to avoid measurement drift in 24-bit sigma-delta ADC front-ends. Use Value: Delivers ±0.02°C repeatability over temperature due to 3.5Ω RON matching and <9Ω flatness - eliminating per-channel calibration. |
Use Scenario: Building modular signal routing matrices in automated test equipment (ATE) for RF and baseband stimulus/response paths. IC Role / Device Role / Timing Role: High-bandwidth (300MHz) SPST switch enabling broadband signal path selection with minimal insertion loss variation. Use Value: Supports DC–100MHz signal routing with <0.2dB RON variation, reducing calibration overhead in multi-instrument synchronization setups. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual SPST analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADG702BRMZ-REEL | Higher RON (60Ω max @ +3V), wider temp range (–40°C to +125°C), same 8-MSOP package. | Better suited for automotive under-hood sensing where extended temperature rating is mandatory. | Select ADG702BRMZ-REEL only if >+85°C operation is required; MAX4731EUA+ offers lower RON and leakage for portable industrial use. |
| TS5A23157DCUR | Lower RON (0.9Ω typ @ +3.3V), but higher leakage (10nA), smaller 8-VSSOP footprint (2.3mm × 2.0mm). | Ideal for high-speed, low-distortion routing in consumer audio SoC interfaces where leakage is less critical. | Choose TS5A23157DCUR for <1Ω RON priority in non-battery-critical designs; MAX4731EUA+ remains superior for nanoamp-level system leakage budgets. |
Compared with ADG702BRMZ-REEL and TS5A23157DCUR, the MAX4731EUA+ uniquely balances ultra-low leakage (0.1nA), moderate RON (50Ω), and industry-standard µMAX® packaging - making it the optimal choice for long-life, precision, battery-operated instrumentation where both power and accuracy are constrained.
Availability
MAX4731EUA+ is available at Aetrix Electronics and suitable for portable medical sensors, USB-C audio adapters, industrial data loggers, and test & measurement multiplexers requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MAX4731EUA+ 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
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for demanding industrial, medical, and communications applications.
The MAX4731EUA+ belongs to Maxim's low-voltage analog switch product line, engineered specifically for ultra-low-power, high-accuracy signal routing in battery-constrained and space-sensitive systems.
FAQ
What is the maximum supply voltage rating for the MAX4731EUA+?
The MAX4731EUA+ has an absolute maximum supply voltage (V+) of +12V, but its recommended operating range is +2.0V to +11V. Operation above +11V risks reliability degradation; for +11V use, a minimum 0.1µF ceramic bypass capacitor must be placed directly at the V+ pin to ensure stability and prevent latch-up.
Does the MAX4731EUA+ support rail-to-rail analog signal switching?
Yes, the MAX4731EUA+ fully supports rail-to-rail analog signal switching - signals from GND to V+ pass through the NO1/COM1 and NO2/COM2 paths with minimal RON variation. This capability eliminates level-shifting circuitry in single-supply systems such as portable data loggers and battery-powered sensor nodes using the MAX4731EUA+.
What is the logic compatibility of the MAX4731EUA+ control inputs?
The MAX4731EUA+ IN1 and IN2 inputs are TTL/CMOS-compatible when operated from a +5V supply (VIH = 2.0V min, VIL = 0.8V max). At other supply voltages, they require rail-to-rail logic drive - e.g., 0V/3.3V for a +3.3V V+, or 0V/11V for an +11V V+. This ensures minimal quiescent current and consistent switching thresholds across the full supply range of the MAX4731EUA+.
How does the MAX4731EUA+ handle leakage current in high-impedance circuits?
The MAX4731EUA+ guarantees ±0.1nA maximum leakage current at +25°C on all analog terminals (NO_, COM_), making it suitable for high-impedance applications like pH electrode interfaces and photodiode transimpedance amplifiers. At +85°C, leakage rises to ±2nA - still within usable range for most precision sensor front-ends using the MAX4731EUA+.
Can the MAX4731EUA+ be used in audio signal routing applications?
Yes, the MAX4731EUA+ is widely deployed in audio routing due to its –108dB crosstalk at 1MHz, 300MHz on-channel bandwidth, and low 7.5pC charge injection - all contributing to low THD (<0.001% at 1kHz) and absence of audible switching artifacts. Its dual NO configuration in the MAX4731EUA+ simplifies mono/stereo source selection in compact audio adapters and docking stations.
MAX4731EUA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Switch Circuit:
- SPST - NO
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 2
- On-State Resistance (Max):
- 25Ohm
- Channel-to-Channel Matching (ΔRon):
- 200mOhm
- Voltage - Supply, Single (V+):
- 2V ~ 11V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 85ns, 45ns
- -3db Bandwidth:
- 300MHz
- Charge Injection:
- 7.5pC
- Channel Capacitance (CS(off), CD(off)):
- 20pF, 20pF
- Current - Leakage (IS(off)) (Max):
- 100pA
- Crosstalk:
- -108dB @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-uMAX/uSOP
MAX4731EUA+ FAQ
1.How can I place an order for MAX4731EUA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4731EUA+ 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 MAX4731EUA+ reliable?
The price and inventory of MAX4731EUA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4731EUA+ is usually 5 days.
3.What payment methods are accepted for MAX4731EUA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4731EUA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4731EUA+?
MAX4731EUA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4731EUA+ 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 MAX4731EUA+?
For technical support, including MAX4731EUA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4731EUA+ requirements.
6.How does Aetrix verify that MAX4731EUA+ is sourced from the original manufacturer or authorized distributors?
All MAX4731EUA+ 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 MAX4731EUA+ meets industry standards.
7.What is the process for return or replacement of MAX4731EUA+?
All MAX4731EUA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4731EUA+, 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 MAX4731EUA+ part is unused and in its original packaging.
Return procedure for MAX4731EUA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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