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Analog Devices Inc./Maxim Integrated MAX4685EUB
- Part No.:
- MAX4685EUB
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX4685EUB.pdf
- Description:
- IC SWITCH SPDTX2 800MOHM 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:3,892
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Product details
Overview
MAX4685EUB from Maxim Integrated is a dual SPDT analog switch IC designed for low-voltage signal routing in portable and battery-powered systems. It features 0.8Ω max on-resistance (NO/NC) at +2.7V, 50ns turn-on time, 40ns turn-off time, and operates from +1.8V to +5.5V single supply - enabling high-fidelity audio switching in headset and MP3 player applications.
For engineers reviewing the MAX4685EUB datasheet, MAX4685EUB pinout, MAX4685EUB application, or MAX4685EUB equivalent, key selection criteria include RON matching (≤0.06Ω), rail-to-rail signal handling, 1.8V logic compatibility, and UCSP package footprint constraints for space-constrained PCB layouts.
Technical Context
The MAX4685EUB implements break-before-make switching with 2ns typical delay to prevent signal shorting during state transitions. Its BiCMOS process enables low RON flatness (≤0.35Ω) across the full 0V to V+ analog range and guarantees ≤1nA leakage at +25°C.
It supports bidirectional analog signal routing with ±300mA continuous current per channel and integrates 1.8V-tolerant digital inputs that accept up to +5.5V logic regardless of V+ - simplifying interface design with mixed-supply microcontrollers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RON (NO/NC) | 0.8Ω max at +2.7V - ensures minimal signal attenuation in audio and sensor paths |
| RON Match | ≤0.06Ω between channels - critical for balanced differential signal routing |
| tON/tOFF | 50ns/40ns max at +3V - supports fast multiplexing in real-time communication circuits |
| Supply Range | +1.8V to +5.5V - compatible with Li-ion, coin-cell, and 3.3V/5V system rails |
| Leakage Current | ±1nA max at +25°C - preserves signal integrity in high-impedance sensor interfaces |
| Off-Isolation | −64dB at 100kHz - suppresses crosstalk between active and inactive channels |
| THD | 0.03% - maintains fidelity in audio-frequency analog signal paths |
Pinout & Package
The MAX4685EUB is housed in a 10-pin µMAX® package (3mm × 3mm), with exposed pad (EP) requiring connection to GND for thermal and electrical performance. Pin numbering follows standard µMAX layout; EP is not electrically assigned but must be soldered to ground plane.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | V+ | Positive supply input - must be applied before analog signals to prevent latch-up |
| 2, 10 | NO1, NO2 | Normally open analog terminals - connect to destination nodes when switch is enabled |
| 3, 9 | COM1, COM2 | Common analog terminals - serve as bidirectional signal ports for both NO and NC paths |
| 4, 8 | IN1, IN2 | Digital control inputs - 1.8V logic-compatible; high = connect COM to NO, low = connect COM to NC |
| 5, 7 | NC1, NC2 | Normally closed analog terminals - default path when IN = low |
| 6 | GND | Ground reference - connects to system ground and EP for optimal noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail signal handling | Supports analog signals from GND to V+ without clipping - essential for full-scale audio and sensor outputs |
| Break-before-make switching | 2ns guaranteed delay prevents momentary shorting between NO and NC paths during transition |
| Low charge injection (200pC) | Minimizes voltage glitches at COM node - critical for precision sampling and low-noise instrumentation |
| 12-bump UCSP option available | 2.0mm × 1.5mm footprint - alternative ultra-compact packaging for highest-density layouts (not µMAX) |
| −68dB crosstalk @ 100kHz | Isolates adjacent channels in multi-signal routing - enables clean simultaneous audio/video path switching |
Applications
| Speaker Headset Switching | MP3 Player Audio Routing |
|---|---|
Use Scenario: Dynamically route mono/stereo audio between internal speaker and 3.5mm headset jack in portable media players. IC Role / Device Role / Timing Role: Dual SPDT analog switch managing signal path selection under microcontroller GPIO control. Use Value: 0.8Ω RON and 0.03% THD preserve audio fidelity; 1.8V logic compatibility allows direct interface with low-power MCU I/O. |
Use Scenario: Select between DAC output, line-in, and microphone input in handheld music players with shared ADC/DAC resources. IC Role / Device Role / Timing Role: Bidirectional analog multiplexer enabling flexible signal path reconfiguration during playback/recording modes. Use Value: Rail-to-rail operation handles full DAC swing; −64dB off-isolation prevents bleed-through between input and output channels. |
| Battery-Operated Equipment | Cellular Phone Peripherals |
Use Scenario: Route sensor signals (e.g., temperature, ambient light) to shared ADC while minimizing power draw in IoT edge nodes. IC Role / Device Role / Timing Role: Low-leakage analog switch enabling selective sensor activation without loading inactive channels. Use Value: ±1nA max leakage at +25°C extends battery life; +1.8V minimum supply supports single-cell Li-ion operation down to 2.0V. |
Use Scenario: Switch between earpiece, loudspeaker, and Bluetooth audio codec paths in smartphone baseband subsystems. IC Role / Device Role / Timing Role: High-speed analog switch supporting rapid audio mode changes during call handover or accessory detection. Use Value: 50ns tON enables sub-millisecond path reconfiguration; 0.06Ω RON match ensures balanced stereo output. |
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 |
|---|---|---|---|
| MAX4684EUB | Asymmetric RON: 0.5Ω (NC), 0.8Ω (NO) - optimized for headset/speaker load mismatch | Better suited for applications requiring different drive strengths on NC vs. NO paths | Select MAX4684EUB only if asymmetric on-resistance improves system-level THD or power delivery balance |
| TMUX1574DBVR | Higher RON (1.3Ω typ), wider supply (1.08V–5.5V), no UCSP option - lower cost, larger TSSOP-16 package | Acceptable where board area is less constrained and 0.8Ω RON is not required | Choose TMUX1574DBVR for cost-sensitive designs accepting higher insertion loss and slower switching (75ns tON) |
Compared with MAX4685EUB, MAX4684EUB offers lower NC-path resistance for improved speaker drive but sacrifices NO/NC symmetry, while TMUX1574DBVR trades RON and speed for broader voltage support and simplified procurement - making MAX4685EUB optimal for compact, high-fidelity audio routing where matched dual-path performance is mandatory.
Availability
MAX4685EUB is available at Aetrix Electronics and suitable for battery-operated equipment, cellular phone peripherals, and MP3 player audio routing requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX4685EUB 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX4685EUB belongs to Maxim's low-voltage analog switch product line, engineered specifically for space-constrained, low-power portable electronics requiring precision signal routing with minimal distortion and leakage.
FAQ
What is the maximum supply voltage rating for the MAX4685EUB?
The MAX4685EUB has an absolute maximum supply voltage (V+) of +6V, but its operational range is specified from +1.8V to +5.5V. Operating above +5.5V risks exceeding safe operating limits and may cause permanent damage. The MAX4685EUB is fully characterized at +2.7V and +3.3V supplies, with RON increasing slightly below +2.0V.
Does the MAX4685EUB support rail-to-rail analog signal switching?
Yes, the MAX4685EUB supports true rail-to-rail analog signal handling - signals from GND to V+ pass through the switch with minimal RON variation (≤0.35Ω flatness). This capability is confirmed across the full −40°C to +85°C temperature range and enables use with full-scale DAC outputs and sensor interfaces without signal clipping.
Can the MAX4685EUB be used with 1.8V logic control signals?
Yes, the MAX4685EUB digital inputs are 1.8V logic-compatible: VIH is guaranteed ≥1.4V and VIL ≤0.5V when V+ is +2.7V to +3.3V. This allows direct interfacing with 1.8V microcontrollers without level-shifting. Input leakage remains ≤±1000nA, ensuring low power consumption in always-on portable systems using the MAX4685EUB.
What is the thermal limitation for the exposed pad on the MAX4685EUB µMAX package?
The MAX4685EUB µMAX package includes an exposed pad (EP) that must be soldered to a GND plane for thermal dissipation and EMI reduction. While the EP itself has no voltage rating, it must be connected to GND to maintain specified RON, leakage, and reliability. Thermal derating begins above +70°C at 5.6mW/°C - limiting continuous power dissipation to 444mW at ambient.
How does the MAX4685EUB compare to the MAX4684EUB in terms of channel matching?
The MAX4685EUB guarantees ≤0.06Ω RON match between its two SPDT channels (NO1/NO2 and NC1/NC2), identical to the MAX4684EUB. However, the MAX4684EUB provides asymmetric RON (0.5Ω NC, 0.8Ω NO), whereas the MAX4685EUB delivers matched 0.8Ω RON on both NO and NC paths - making the MAX4685EUB preferable for applications requiring identical path characteristics across both switches.
MAX4685EUB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Switch Circuit:
- SPDT
- Multiplexer/Demultiplexer Circuit:
- 2:1
- Number of Circuits:
- 2
- On-State Resistance (Max):
- 800mOhm
- Channel-to-Channel Matching (ΔRon):
- 60mOhm
- Voltage - Supply, Single (V+):
- 1.8V ~ 5.5V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 50ns, 30ns
- -3db Bandwidth:
- -
- Charge Injection:
- 200pC
- Channel Capacitance (CS(off), CD(off)):
- 84pF, 37pF
- Current - Leakage (IS(off)) (Max):
- 1nA
- Crosstalk:
- -68dB @ 100kHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-uMAX/uSOP
MAX4685EUB FAQ
1.How can I place an order for MAX4685EUB through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4685EUB 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 MAX4685EUB reliable?
The price and inventory of MAX4685EUB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4685EUB is usually 5 days.
3.What payment methods are accepted for MAX4685EUB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4685EUB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4685EUB?
MAX4685EUB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4685EUB 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 MAX4685EUB?
For technical support, including MAX4685EUB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4685EUB requirements.
6.How does Aetrix verify that MAX4685EUB is sourced from the original manufacturer or authorized distributors?
All MAX4685EUB 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 MAX4685EUB meets industry standards.
7.What is the process for return or replacement of MAX4685EUB?
All MAX4685EUB units undergo pre-shipment inspection (PSI). If there is an issue with MAX4685EUB, 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 MAX4685EUB part is unused and in its original packaging.
Return procedure for MAX4685EUB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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