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Analog Devices Inc./Maxim Integrated MAX4520EUA+
- Part No.:
- MAX4520EUA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX4520EUA+.pdf
- Description:
- IC SWITCH SPST-NOX1 160OHM 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:100
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Product details
Overview
The MAX4520EUA+ from Maxim Integrated is a normally open (NO), fault-protected, rail-to-rail SPST analog switch in an 8-pin µMAX package. It operates with dual supplies (±4.5V to ±20V) or single supply (+9V to +36V), delivers ≤160Ω on-resistance at ±15V, supports ±36V fault protection with power applied and ±40V with power off, and features 0.5nA off-leakage at +25°C - enabling robust signal routing in industrial data acquisition systems where overvoltage transients are common.
For engineers reviewing the MAX4520EUA+ datasheet, MAX4520EUA+ pinout, MAX4520EUA+ application, or MAX4520EUA+ equivalent, key selection criteria include its fault-protected NO configuration, rail-to-rail signal handling up to ±14V, 3.5µs positive-fault recovery time, TTL/CMOS-compatible logic thresholds, and µMAX package compatibility with space-constrained PCB layouts.
Technical Context
The MAX4520EUA+ uses parallel N- and P-channel FET architecture to achieve low on-resistance while maintaining rail-to-rail conduction. Its dual comparator-based fault detection monitors NO voltage against V+ and V−, disabling the signal path and activating booster FETs (P2/N2) to clamp COM to the appropriate supply during overvoltage events.
Unlike traditional series-FET fault-protected switches, the MAX4520EUA+ maintains consistent on-resistance across the full signal range and provides active current sourcing/sinking (up to ±13mA) at COM during faults - eliminating output glitches and ensuring unambiguous rail-referenced outputs at fault onset and recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Type | Normally open (NO) SPST analog switch - COM connects to NO only when IN = logic high. |
| Fault Protection | ±36V on NO pin with power applied; ±40V with V+ = V− = 0 - protects downstream circuitry without external components. |
| On-Resistance | ≤160Ω max at ±15V - ensures minimal signal attenuation and thermal drift in precision analog paths. |
| Off-Leakage Current | 0.5nA max at +25°C - preserves accuracy in high-impedance sensor interfaces and sample-hold circuits. |
| Supply Range | Dual: ±4.5V to ±20V; Single: +9V to +36V with V− tied to GND - supports wide-range industrial and avionics power architectures. |
| Logic Compatibility | TTL/CMOS thresholds (VIL = 0.8V, VIH = 2.4V at ±15V or +12V) - eliminates level-shifting in mixed-voltage control systems. |
| Fault Recovery Time | 3.5µs (positive fault), 1.3µs (negative fault) - enables fast re-establishment of valid signal after transient clearance. |
Pinout & Package
Package: 8-pin µMAX (3mm × 3mm, 0.8mm height, exposed pad). Pin 1 = V+, Pin 2 = COM, Pin 3 = IN, Pin 4 = GND, Pin 5 = NC, Pin 6 = NC, Pin 7 = V−, Pin 8 = NO. No internal connection on pins 5 and 6.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive supply input | Provides gate drive and logic bias; sets high-threshold logic level; sources current to COM during positive faults. |
| COM | Common analog terminal | Signal path output; not fault protected - must remain within V− to V+ to avoid ESD diode conduction. |
| IN | Digital control input | TTL/CMOS-compatible logic interface; controls NO–COM connection state; no fault protection. |
| GND | Ground reference | Logic and supply return; not part of analog signal path; contains ESD diodes to V+ and V−. |
| NC (pins 5,6) | No connection | Unbonded die pads - must be left floating or grounded per layout best practices; no electrical function. |
| V− | Negative supply input | Provides gate drive and logic bias; sinks current from COM during negative faults; tied to GND for single-supply operation. |
| NO | Fault-protected analog input | Normally open terminal; rated for ±36V fault with power, ±40V with power off; clamped via internal boosters during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail signal handling | Passes signals from V− to V+ without distortion or clipping - essential for full-scale ADC/DAC interfacing. |
| Active fault-current limiting | Sources/sinks up to ±13mA at COM during faults - sustains load voltage at rail without external current-limiting resistors. |
| No power-supply sequencing required | Operates correctly regardless of V+ or V− ramp order - simplifies power-up sequencing in multi-rail systems. |
| Low charge injection | ≤5pC typical - minimizes voltage glitch on high-impedance nodes during switching, critical for precision sampling. |
| Zero-glitch fault transition | Output clamped to appropriate supply during fault onset/end - prevents false triggering in downstream comparators or logic. |
Applications
| Industrial Data Acquisition | Avionics Signal Routing |
|---|---|
Use Scenario: Multiplexing sensor inputs (thermocouples, RTDs) into a shared ADC channel under harsh EMI and transient environments. IC Role / Device Role / Timing Role: Fault-protected analog switch isolating individual sensor paths; NO configuration prevents default short-circuit on power-up. Use Value: ±36V fault tolerance eliminates need for external TVS diodes; rail-to-rail operation preserves full dynamic range of ±10V sensors. |
Use Scenario: Redundant flight-control signal selection between primary and backup channels with automatic fault isolation. IC Role / Device Role / Timing Role: Normally open switch enabling fail-safe signal gating; COM output drives isolated receiver with rail-clamped fault response. Use Value: 3.5µs positive-fault recovery ensures <5µs interruption window - meets DO-160 Section 22 transient immunity timing requirements. |
| ATE Channel Protection | Redundant Power Monitoring |
Use Scenario: Protecting DUT interface cards from accidental overvoltage during automated test sequence execution. IC Role / Device Role / Timing Role: Front-end SPST switch decoupling test instrumentation from DUT; NO state blocks default leakage path. Use Value: 0.5nA off-leakage at +25°C prevents measurement error in picoampere-level leakage tests; ±40V power-off protection covers maintenance scenarios. |
Use Scenario: Monitoring backup battery voltage in telecom base stations while automatically disconnecting faulty cells. IC Role / Device Role / Timing Role: Fault-aware switch enabling voltage sensing only when cell is within safe operating range; NO state disables monitoring during overvoltage. Use Value: Internal clamp output current (±13mA) directly drives optocoupler LED without external driver - reduces BOM count and board area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPST analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADG1419BRMZ | Higher on-resistance (1.3Ω typ), no fault protection, 12V max supply, 10-lead MSOP package | Designed for low-distortion audio/precision instrumentation, not overvoltage-prone environments | Select when ultra-low RON and THD matter more than fault resilience; requires external protection for industrial use. |
| TS5A3159DCKR | Single-supply only (+1.65V to +5.5V), 0.75Ω RON, no fault protection, SC70-6 package | Targeted at portable low-voltage logic-level switching, not high-voltage industrial signal routing | Choose for battery-powered sensor nodes needing minimal quiescent current (<1µA); unsuitable for >6V systems. |
Compared with ADG1419BRMZ and TS5A3159DCKR, the MAX4520EUA+ uniquely combines fault protection, rail-to-rail operation, and wide supply flexibility - making it the only viable option for unattended industrial multiplexers exposed to field wiring transients.
Availability
The MAX4520EUA+ is available at Aetrix Electronics and suitable for industrial data acquisition, avionics signal routing, and ATE equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX4520EUA+ 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 high-performance analog and mixed-signal ICs for demanding industrial, automotive, and communications applications.
The MAX4520EUA+ belongs to Maxim's fault-protected analog switch family, engineered specifically for reliable signal routing in environments with unpredictable voltage transients - such as factory floor instrumentation and airborne control systems.
FAQ
What is the maximum fault voltage the MAX4520EUA+ can withstand on its NO pin?
The MAX4520EUA+ withstands ±36V on the NO pin when power is applied (V+ and V− active), and ±40V when all supplies are removed (V+ = V− = 0). These ratings are absolute limits - exceeding them risks permanent damage. The COM and IN pins are not fault protected and must remain within V− to V+ at all times.
Does the MAX4520EUA+ require power-supply sequencing during startup?
No, the MAX4520EUA+ does not require power-supply sequencing. Its internal logic-level translators operate correctly regardless of whether V+ ramps before V− or vice versa. This eliminates complex power-up timing constraints in multi-rail systems and simplifies design validation for industrial controllers.
How does the MAX4520EUA+ behave during a positive overvoltage fault on the NO pin?
When NO exceeds V+ by ~50mV, the MAX4520EUA+ disables the main N1/P1 FETs, isolating NO from COM. If the switch is ON, the P2 booster FET activates, sourcing up to +13mA from V+ to COM - clamping the output to V+ without glitches. Recovery occurs in 3.5µs once the fault clears.
Can the MAX4520EUA+ operate from a single +12V supply?
Yes, the MAX4520EUA+ supports single-supply operation from +9V to +36V. To configure for +12V, connect V− to GND. Logic thresholds remain TTL/CMOS-compatible (VIL = 0.8V, VIH = 2.4V), and on-resistance is typically 260Ω - verified in the Electrical Characteristics table for +12V conditions.
What is the off-isolation performance of the MAX4520EUA+ at 1MHz?
The MAX4520EUA+ delivers −62dB off-isolation at 1MHz (RL = 50Ω, CL = 15pF), measured between COM and the OFF-state NO terminal. This high isolation suppresses crosstalk in dense multiplexer arrays and maintains signal integrity in high-frequency sensor readout paths.
MAX4520EUA+ 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:
- 1
- On-State Resistance (Max):
- 160Ohm
- Channel-to-Channel Matching (ΔRon):
- -
- Voltage - Supply, Single (V+):
- 9V ~ 36V
- Voltage - Supply, Dual (V±):
- ±4.5V ~ 20V
- Switch Time (Ton, Toff) (Max):
- 500ns, 175ns
- -3db Bandwidth:
- -
- Charge Injection:
- 1.5pC
- Channel Capacitance (CS(off), CD(off)):
- 10pF, 5pF
- Current - Leakage (IS(off)) (Max):
- 500pA
- Crosstalk:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-uMAX/uSOP
MAX4520EUA+ FAQ
1.How can I place an order for MAX4520EUA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4520EUA+ 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 MAX4520EUA+ reliable?
The price and inventory of MAX4520EUA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4520EUA+ is usually 5 days.
3.What payment methods are accepted for MAX4520EUA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4520EUA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4520EUA+?
MAX4520EUA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4520EUA+ 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 MAX4520EUA+?
For technical support, including MAX4520EUA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4520EUA+ requirements.
6.How does Aetrix verify that MAX4520EUA+ is sourced from the original manufacturer or authorized distributors?
All MAX4520EUA+ 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 MAX4520EUA+ meets industry standards.
7.What is the process for return or replacement of MAX4520EUA+?
All MAX4520EUA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4520EUA+, 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 MAX4520EUA+ part is unused and in its original packaging.
Return procedure for MAX4520EUA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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