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Analog Devices Inc./Maxim Integrated MAX394EWP
- Part No.:
- MAX394EWP
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX394EWP.pdf
- Description:
- IC SWITCH SPDT X 4 35OHM 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,636
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Product details
Overview
MAX394EWP from Analog Devices is a precision quad SPDT analog switch optimized for low-voltage, 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, and guarantees break-before-make switching (10ns typ) - enabling high-fidelity audio routing and test equipment multiplexing.
For engineers reviewing the MAX394EWP datasheet, MAX394EWP pinout, MAX394EWP application, or MAX394EWP equivalent, key selection criteria include guaranteed on-resistance flatness (Δ4Ω max), <10pC charge injection, -40°C to +85°C extended temperature operation, and 20-pin wide SO package compatibility with legacy MAX333 designs.
Technical Context
The MAX394EWP integrates four independent CMOS SPDT switches fabricated using low-voltage silicon-gate process, supporting rail-to-rail analog signal handling from V− to V+. Its logic inputs are TTL/CMOS-compatible across supply ranges, with input thresholds specified at +0.8V to +2.4V (≤+8V supplies) or +0.8V to +4V (>+8V supplies).
Switching performance is defined by guaranteed break-before-make timing (10ns typ), turn-on time <130ns, turn-off time <75ns, and ultra-low off-channel leakage (<2.5nA at +85°C). Charge injection is tightly controlled at <10pC, critical for sample-and-hold and precision instrumentation applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | ±2.7V to ±8V bipolar or +2.7V to +15V single supply - supports both split-rail and battery-powered architectures without level-shifting. |
| On-Resistance (max) | 35Ω at ±4.5V - ensures minimal signal attenuation and gain error in precision analog paths. |
| On-Resistance Match | <2Ω between channels - enables matched gain/phase response in multi-channel signal routing or differential switching. |
| Charge Injection | <10pC - reduces voltage glitch and settling error in sampling circuits and DAC output switching. |
| Off-Leakage Current | <2.5nA at +85°C - preserves accuracy in high-impedance sensor interfaces and battery-monitoring circuits. |
| Operating Temp | -40°C to +85°C - qualified for industrial and automotive under-hood auxiliary modules requiring extended thermal stability. |
| ESD Rating | >2000V per Method 3015.7 - enhances robustness during board assembly and field service handling. |
Pinout & Package
MAX394EWP is housed in a 20-pin wide SO (W26-1) surface-mount package with exposed substrate tied to V+, supporting automated assembly and thermal dissipation up to 696mW at +70°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 10, 11, 20 | IN1–IN4 | Active-high logic control inputs; TTL/CMOS-compatible with rail-referenced thresholds. |
| 2, 9, 12, 19 | NO1–NO4 | Normally open switch terminals; connect to COM when corresponding IN = high. |
| 3, 8, 13, 18 | COM1–COM4 | Common poles; carry bidirectional analog signals from NO or NC depending on logic state. |
| 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 applied before analog signals in dual-supply sequencing. |
| 6 | GND | Ground reference; serves as return path for logic and internal bias networks. |
| 15 | N.C. | No internal connection; left unconnected on PCB layout. |
| 16 | V+ | Positive power supply pin; substrate tied internally to this node for ESD protection. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail analog signal handling | Supports signals from V− to V+ without clipping or distortion - eliminates need for external level shifters in mixed-supply systems. |
| Guaranteed flat on-resistance | Δ4Ω max over full analog range - maintains consistent gain and linearity across signal amplitude, critical for audio and measurement front-ends. |
| Break-before-make switching | 10ns typical delay - prevents momentary short-circuit between NO and NC paths, avoiding signal transients in sensitive analog nodes. |
| Ultra-low quiescent current | <1μA total with all inputs high or low - extends battery life in portable instruments and handheld test gear. |
| Pin compatibility with MAX333/MAX333A | Direct drop-in replacement in existing layouts - accelerates upgrade path for legacy designs requiring improved on-resistance and leakage specs. |
Applications
| Audio Signal Routing | Portable Instrument Multiplexing |
|---|---|
Use Scenario: Switching microphone inputs, headphone outputs, or line-level signals in battery-powered audio mixers and field recorders. IC Role / Device Role / Timing Role: Quad SPDT analog switch providing bidirectional, low-distortion signal path selection with no DC bias dependency. Use Value: <35Ω on-resistance and <10pC charge injection preserve SNR and transient fidelity across 20Hz–20kHz bandwidth. |
Use Scenario: Selecting between multiple sensor inputs (thermocouple, RTD, strain gauge) in handheld multimeters and calibration tools. IC Role / Device Role / Timing Role: Precision analog multiplexer enabling sequential sampling with matched channel characteristics and minimal offset drift. Use Value: <2Ω on-resistance matching and <2.5nA leakage at +85°C ensure sub-0.1% gain error and stable zero-point accuracy over operating temperature. |
| Test Equipment Channel Switching | Heads-Up Display (HUD) Signal Conditioning |
Use Scenario: Routing DUT signals to different measurement blocks (oscilloscope, spectrum analyzer, power meter) in automated test systems. IC Role / Device Role / Timing Role: High-speed, low-leakage analog switch enabling reconfigurable signal paths with nanosecond-scale switching integrity. Use Value: <75ns turn-off time and >66dB off-isolation suppress crosstalk between adjacent test channels at 1MHz. |
Use Scenario: Selecting between video sources (camera feed, navigation graphics, warning alerts) driving HUD combiner optics in automotive displays. IC Role / Device Role / Timing Role: Robust analog switch handling composite video and sync signals across extended temperature and ESD-prone environments. Use Value: >2000V ESD rating and -40°C to +85°C qualification ensure reliability in vehicle cabin electronics without additional protection circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad SPDT analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX333ACPP | Higher on-resistance (45Ω max), wider temp range (0°C to +70°C only), plastic DIP package. | Limited to commercial-temperature bench equipment; lacks extended temp and SO packaging of MAX394EWP. | Select when cost-sensitive DIP assembly is required and -40°C operation is unnecessary. |
| ADG1414BRUZ | Lower on-resistance (1.3Ω typ), higher supply voltage limit (+36V), but higher charge injection (12pC) and no guaranteed break-before-make. | Better for high-voltage industrial I/O, less suitable for precision sampling where charge injection and switching integrity are critical. | Prefer for high-voltage multiplexing; avoid where sub-10pC charge injection and deterministic break-before-make are mandatory. |
Compared with MAX333ACPP and ADG1414BRUZ, the MAX394EWP uniquely balances extended temperature operation (-40°C to +85°C), guaranteed break-before-make timing, and ultra-low charge injection (<10pC) in a compact wide SO package - making it optimal for portable, precision, and thermally demanding analog routing tasks.
Availability
MAX394EWP is available at Aetrix Electronics and suitable for test equipment, portable instrumentation, communications systems, and automotive heads-up displays requiring stable component supply across industrial temperature grades.
Supply support for MAX394EWP 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 technologies, serving industrial, automotive, communications, and healthcare markets.
The MAX394EWP belongs to Analog Devices' precision analog switch product line, engineered for low on-resistance, low charge injection, and rail-to-rail operation in portable and thermally demanding signal routing applications.
FAQ
What is the maximum supply voltage rating for MAX394EWP?
The MAX394EWP supports a maximum V+ to V− differential of 17V. For bipolar operation, absolute maximum ratings are V+ ≤ +17V and V− ≥ −17V relative to GND. Exceeding these limits risks permanent damage. The device operates reliably within ±2.7V to ±8V bipolar or +2.7V to +15V single-supply ranges, with recommended derating above +70°C ambient per its 696mW power dissipation limit in wide SO packaging.
Does MAX394EWP support rail-to-rail analog signal switching?
Yes, the MAX394EWP supports true rail-to-rail analog signal handling: switched signals on COM, NO, and NC pins can swing from V− to V+ without damage or performance degradation. This capability is enabled by internal level translation and clamping diodes, allowing direct interface with sensors, DACs, and ADCs operating at supply rails - eliminating external biasing or level-shifting circuitry in most implementations.
What is the guaranteed on-resistance match between channels for MAX394EWP?
The MAX394EWP guarantees on-resistance matching of less than 2Ω between any two channels at +25°C, and less than 4Ω across the full −40°C to +85°C operating temperature range. This specification is measured under defined conditions (V+ = 5V, V− = −5V, VNO/VNC = ±3V, ICOM = 10mA) and ensures predictable gain tracking and phase coherence in multi-channel analog signal paths such as stereo audio or differential sensor interfaces.
Is MAX394EWP pin-compatible with older Maxim analog switches?
Yes, the MAX394EWP is pin-compatible with the MAX333 and MAX333A in the same 20-pin wide SO package. This allows direct replacement in existing designs without PCB layout changes. However, the MAX394EWP improves upon its predecessors with lower on-resistance (35Ω max vs. 45Ω max), tighter channel matching (<2Ω vs. <5Ω), and enhanced ESD robustness (>2000V vs. unspecified), making it a functional and performance upgrade path.
What is the typical charge injection value for MAX394EWP, and why does it matter?
The MAX394EWP guarantees charge injection of less than 10pC, with typical values as low as 5pC at +25°C. This parameter directly impacts signal integrity in sampling circuits: lower charge injection minimizes voltage glitches on high-impedance nodes (e.g., sample-and-hold capacitors or op-amp inputs), reducing settling time and improving effective resolution in data acquisition systems and precision DAC output switching applications.
MAX394EWP 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-SOIC
MAX394EWP FAQ
1.How can I place an order for MAX394EWP through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX394EWP 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 MAX394EWP reliable?
The price and inventory of MAX394EWP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX394EWP is usually 5 days.
3.What payment methods are accepted for MAX394EWP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX394EWP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX394EWP?
MAX394EWP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX394EWP 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 MAX394EWP?
For technical support, including MAX394EWP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX394EWP requirements.
6.How does Aetrix verify that MAX394EWP is sourced from the original manufacturer or authorized distributors?
All MAX394EWP 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 MAX394EWP meets industry standards.
7.What is the process for return or replacement of MAX394EWP?
All MAX394EWP units undergo pre-shipment inspection (PSI). If there is an issue with MAX394EWP, 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 MAX394EWP part is unused and in its original packaging.
Return procedure for MAX394EWP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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