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Analog Devices Inc./Maxim Integrated MAX394EAP
- Part No.:
- MAX394EAP
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
MAX394EAP.pdf
- Description:
- IC SWITCH SPDT X 4 35OHM 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,589
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Product details
Overview
The MAX394EAP from Analog Devices is a precision, low-voltage, quad SPDT analog switch designed for rail-to-rail signal routing in portable and industrial systems. It operates from ±2.7V to ±8V bipolar or +2.7V to +15V single supply, delivers <35Ω max on-resistance with <2Ω channel matching, <4Ω on-resistance flatness, and <10pC charge injection - enabling high-fidelity audio and test-signal switching in battery-powered instruments.
For engineers reviewing the MAX394EAP datasheet, MAX394EAP pinout, MAX394EAP application, or MAX394EAP equivalent, key selection criteria include guaranteed break-before-make timing (10ns typ), sub-2.5nA off-leakage at +85°C, ESD >2000V, TTL/CMOS-compatible logic inputs, and SSOP-20 packaging for space-constrained PCB layouts.
Technical Context
The MAX394EAP integrates four independent CMOS SPDT switches fabricated using low-voltage silicon-gate process technology. Each switch features matched P- and N-channel MOSFETs to ensure flat on-resistance over the full analog signal range (V– to V+) and minimize distortion in precision signal paths.
Its digital interface supports dual-supply logic thresholds (0.8V to 2.4V up to +8V supplies; up to +4V above +8V) and tolerates analog inputs beyond rails via internal clamping diodes. Break-before-make operation prevents momentary shorting during channel transitions, critical for multiplexer and relay-replacement applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance | <35Ω max at ±4.5V supplies - ensures minimal signal attenuation and voltage drop in low-level analog paths. |
| On-Resistance Match | <2Ω between channels - enables precise gain/phase matching in differential or multi-channel signal routing. |
| Charge Injection | <10pC - reduces glitch-induced settling errors in sample-and-hold and ADC front-end circuits. |
| Off-Leakage Current | <2.5nA at +85°C - preserves accuracy in high-impedance sensor interfaces and battery-monitoring nodes. |
| Supply Range | ±2.7V to ±8V or +2.7V to +15V - supports operation across legacy ±5V, modern 3.3V/5V, and extended-range industrial rails. |
| ESD Rating | >2000V per Method 3015.7 - provides robust handling in manufacturing and field-deployed equipment. |
| Turn-On/Off Time | <130ns / <75ns - enables fast channel switching in automated test equipment and real-time signal conditioning. |
Pinout & Package
MAX394EAP is housed in a 20-pin SSOP (Shrink Small Outline Package) with 0.65mm pitch, optimized for high-density PCB layouts while maintaining thermal and mechanical reliability across –40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 10, 11, 20 | IN1–IN4 | Logic control inputs; TTL/CMOS-compatible, referenced to GND, drive internal switch gates. |
| 2, 9, 12, 19 | NO1–NO4 | Normally open switch terminals; connect to COM when corresponding IN = high. |
| 3, 8, 13, 18 | COM1–COM4 | Common analog signal path; bidirectional, rail-to-rail capable (V– to V+). |
| 4, 7, 14, 17 | NC1–NC4 | Normally closed switch terminals; connect to COM when corresponding IN = low. |
| 5 | V– | Negative power supply pin; must be connected before applying analog signals in dual-supply mode. |
| 6 | GND | Ground reference for logic inputs and substrate; decoupling recommended near this pin. |
| 15 | N.C. | No internal connection; left unconnected on PCB. |
| 16 | V+ | Positive power supply pin; supports single- or dual-supply operation up to +15V or ±8V. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail analog signal handling | Switches signals from V– to V+ without clipping - essential for full-scale audio, sensor, and DAC output routing. |
| Guaranteed break-before-make | 10ns typical delay prevents signal shorting during channel transitions - critical for fault-tolerant multiplexing. |
| Ultra-low quiescent current | <1μA total with all inputs high/low - extends battery life in portable test gear and handheld instruments. |
| Flat on-resistance vs. signal voltage | Δ4Ω max variation across full analog range - minimizes harmonic distortion in audio and precision measurement paths. |
| ESD-hardened design | >2000V HBM - eliminates need for external protection in board-level ESD zones. |
Applications
| Test Equipment | Audio Signal Routing |
|---|---|
Use Scenario: Automated test system switching between DUT signal sources and measurement instruments. IC Role / Device Role / Timing Role: Quad SPDT analog switch providing isolated, low-distortion signal path selection under microcontroller control. Use Value: Sub-2Ω channel matching and <10pC charge injection preserve measurement integrity across 16-bit ADC/DAC channels. |
Use Scenario: Channel selection and input routing in professional audio mixers and portable recorders. IC Role / Device Role / Timing Role: Low-noise, rail-to-rail analog switch enabling zero-crossing mute and source switching without pop/click artifacts. Use Value: <35Ω on-resistance and flat RON maintain wide dynamic range and THD+N below –100dB. |
| Portable Instruments | Communications Systems |
Use Scenario: Battery-powered multimeter or oscilloscope probe multiplexing and range selection. IC Role / Device Role / Timing Role: Precision analog switch managing high-impedance front-end signal paths and attenuator networks. Use Value: <2.5nA off-leakage at +85°C ensures stable DC accuracy and long-term calibration retention. |
Use Scenario: Signal path reconfiguration in baseband processing modules of cellular infrastructure and satellite modems. IC Role / Device Role / Timing Role: High-reliability SPDT switch routing IF/RF baseband signals between filters, amplifiers, and ADCs. Use Value: ESD >2000V and –40°C to +85°C rating support deployment in uncontrolled environmental enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX333AEPP | Pin-compatible 20-pin DIP variant; same electrical specs but wider temperature range (–40°C to +85°C) and plastic DIP package. | Preferred where through-hole assembly or legacy DIP footprint is required; lacks SSOP's board-area savings. | Select MAX333AEPP only if DIP mounting is mandatory; otherwise MAX394EAP offers superior density and thermal performance. |
| ADG1414BRUZ | Quad SPDT with 1.8Ω typical RON, but higher 15pC charge injection and no guaranteed break-before-make. | Better for ultra-low-RON DC-coupled paths; unsuitable where glitch-free switching is critical (e.g., sampling circuits). | Choose ADG1414BRUZ for lowest on-resistance; choose MAX394EAP when charge injection & B-B-M timing are design priorities. |
Compared with MAX333AEPP, MAX394EAP offers identical functionality in a smaller SSOP package with improved thermal resistance; compared with ADG1414BRUZ, it trades ~1.5Ω lower RON for guaranteed break-before-make and 40% lower charge injection - making it preferable for precision sampling and audio routing.
Availability
MAX394EAP is available at Aetrix Electronics and suitable for test equipment, portable instruments, audio signal routing, and communications systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX394EAP 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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The MAX394EAP belongs to Analog Devices' precision analog switch product line, engineered specifically for low-distortion, low-leakage, and rail-to-rail signal routing in portable and high-reliability instrumentation.
FAQ
What is the operating temperature range of the MAX394EAP?
The MAX394EAP is rated for operation from –40°C to +85°C, validated across its full electrical specification range including on-resistance, leakage current, and switching timing. This extended industrial temperature grade makes the MAX394EAP suitable for deployment in outdoor test gear, automotive diagnostics tools, and factory-floor instrumentation where ambient conditions exceed commercial-grade limits. All parametric guarantees in the datasheet apply within this range.
Does the MAX394EAP support single-supply operation?
Yes, the MAX394EAP supports single-supply operation from +2.7V to +15V, with rail-to-rail analog signal handling from ground to V+. At +5V supply, typical on-resistance is 25Ω (max 35Ω), and logic inputs remain compatible with standard 3.3V or 5V CMOS/TTL levels. The device maintains guaranteed break-before-make timing and <10pC charge injection even under single-supply bias, enabling direct integration into battery-powered and USB-powered systems without level-shifting circuitry.
What is the maximum analog signal voltage the MAX394EAP can switch?
The MAX394EAP can switch analog signals from V– to V+, supporting full rail-to-rail operation. With ±5V supplies, it handles ±5V signals; with +5V single supply, it switches 0V to +5V. Absolute maximum ratings allow VCOM, VNO, and VNC to reach (V– – 2V) to (V+ + 2V) due to internal clamping diodes - but sustained operation beyond V– to V+ requires external current limiting to avoid exceeding 30mA per pin. This capability enables use in both bipolar sensor interfaces and unipolar data-acquisition front ends.
How does the MAX394EAP achieve guaranteed break-before-make switching?
The MAX394EAP achieves guaranteed break-before-make (B-B-M) through internal timing circuitry that delays turn-on of the new switch path by a minimum of 2ns (typical 10ns) after turn-off of the prior path. This is verified across –40°C to +85°C and all supply voltages, preventing momentary shorting between NC and NO terminals during logic transitions. B-B-M is intrinsic to the IC's gate-drive architecture and requires no external timing components - making it reliable for safety-critical multiplexing in medical devices and automated test systems where signal integrity during reconfiguration is non-negotiable.
Is the MAX394EAP pin-compatible with other Maxim analog switches?
Yes, the MAX394EAP is pin-compatible with the MAX333 and MAX333A in the same 20-pin SSOP package, sharing identical pin functions, layout, and footprint. This allows direct replacement in existing designs without PCB revision, provided the temperature grade and performance requirements align. However, note that MAX333 variants may differ in leakage current specs and ESD rating - always verify datasheet revisions before substitution. The MAX394EAP retains full functional equivalence while offering enhanced production consistency and extended temperature validation.
MAX394EAP 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:
- 4
- On-State Resistance (Max):
- 35Ohm
- Channel-to-Channel Matching (ΔRon):
- 500mOhm
- Voltage - Supply, Single (V+):
- 2.7V ~ 15V
- Voltage - Supply, Dual (V±):
- ±2.7V ~ 8V
- Switch Time (Ton, Toff) (Max):
- 130ns, 75ns
- -3db Bandwidth:
- -
- Charge Injection:
- 5pC
- Channel Capacitance (CS(off), CD(off)):
- 12pF, 12pF
- Current - Leakage (IS(off)) (Max):
- 200pA
- Crosstalk:
- -88dB @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SSOP
MAX394EAP FAQ
1.How can I place an order for MAX394EAP through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX394EAP 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 MAX394EAP reliable?
The price and inventory of MAX394EAP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX394EAP is usually 5 days.
3.What payment methods are accepted for MAX394EAP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX394EAP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX394EAP?
MAX394EAP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX394EAP 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 MAX394EAP?
For technical support, including MAX394EAP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX394EAP requirements.
6.How does Aetrix verify that MAX394EAP is sourced from the original manufacturer or authorized distributors?
All MAX394EAP 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 MAX394EAP meets industry standards.
7.What is the process for return or replacement of MAX394EAP?
All MAX394EAP units undergo pre-shipment inspection (PSI). If there is an issue with MAX394EAP, 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 MAX394EAP part is unused and in its original packaging.
Return procedure for MAX394EAP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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