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Analog Devices Inc./Maxim Integrated MAX350EAP+
- Part No.:
- MAX350EAP+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
MAX350EAP+.pdf
- Description:
- IC SWITCH SP4T X 2 100OHM 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:143
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Product details
Overview
MAX350EAP+ from Maxim Integrated is a dual 4-channel serially controlled analog multiplexer with bidirectional signal routing, 100Ω max on-resistance (±5V supplies), ±2.7V to ±8V dual or +2.7V to +16V single supply operation, and rail-to-rail signal handling up to ±5.5V. It serves as a programmable analog switch matrix in precision data-acquisition front-ends requiring low leakage and matched channel performance.
For engineers reviewing the MAX350EAP+ datasheet, MAX350EAP+ pinout, MAX350EAP+ application, or MAX350EAP+ equivalent, this page delivers verified electrical specs, daisy-chain SPI-compatible interface timing, COMA/COMB dual-output architecture, -40°C to +85°C industrial temperature rating, and real-world use cases in ATE and avionics signal routing.
Technical Context
The MAX350EAP+ implements two independent 4-to-1 analog multiplexers (COMA/NO0A–NO3A and COMB/NO0B–NO3B) controlled by an 8-bit shift register clocked via SPI/QSPI/MICROWIRE. Each switch conducts bidirectionally with matched on-resistance (≤16Ω) and flatness (≤10Ω) over its full signal range.
It features asynchronous RESET that forces all switches OFF and clears the shift register, TTL/CMOS-compatible digital inputs (0.8V/2.4V thresholds), >2kV ESD protection, and daisy-chain capability via DOUT output synchronized to SCLK falling edge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Configuration | Dual 4-to-1 SPST multiplexer: COMA/NO0A–NO3A and COMB/NO0B–NO3B, fully independent paths |
| On-Resistance (RON) | 100Ω max at ±5V supplies - ensures minimal signal attenuation and gain error in precision measurement paths |
| On-Resistance Match | ≤16Ω max between channels - critical for multi-channel differential measurements and ratiometric sensor interfaces |
| Off-Leakage Current | 0.1nA at +25°C, 5nA at +85°C - preserves accuracy in high-impedance sensor and integrator circuits |
| Supply Range | ±2.7V to ±8V dual or +2.7V to +16V single - supports legacy ±5V systems and modern low-voltage or wide-range industrial rails |
| Rail-to-Rail Signal Range | V- −2V to V+ +2V - enables full utilization of ADC input ranges without level-shifting in data-acquisition systems |
| Serial Interface | SPI/QSPI/MICROWIRE-compatible 3-wire interface (CS, SCLK, DIN) with daisy-chain DOUT - reduces MCU GPIO count and simplifies multi-mux control |
Pinout & Package
MAX350EAP+ is housed in a 20-pin SSOP (Shrink Small Outline Package) with 0.65mm pitch, 7.2mm × 5.3mm body, and exposed pad for thermal enhancement. Pin 14 is N.C. (not internally connected); pins 10, 15, and 16 are also N.C. per datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | CS, RESET, DOUT, V− | Chip-select enables serial load; RESET asynchronously clears shift register; DOUT enables daisy-chaining; V− sets negative rail |
| 5, 6–9 | GND, COMA, NO0A–NO3A | Analog ground reference; COMA is mux-A output; NO0A–NO3A are mux-A inputs (bidirectional) |
| 11–14, 17–20 | NO0B–NO3B, COMB, V+, DIN, SCLK | NO0B–NO3B are mux-B inputs; COMB is mux-B output; V+ sets positive rail; DIN/SCLK accept serial command stream |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 4-to-1 muxes | Enables simultaneous routing of two separate analog signal streams (e.g., differential pair + reference channel) without crosstalk-induced coupling |
| Asynchronous RESET | Guarantees known OFF state at power-up or fault recovery-eliminates undefined analog path states during system initialization |
| ±5.5V analog signal range | Supports direct connection to ±5V op-amps and ADCs without external clamping or level-shifting circuitry |
| 8-bit serial shift register | Reduces control wiring to three lines (CS/SCLK/DIN) and allows firmware-driven dynamic reconfiguration of signal paths |
| 200ns typical turn-on time | Meets sub-microsecond settling requirements in high-speed ATE and automated test sequencing |
Applications
| Industrial Process Monitoring | Avionics Sensor Multiplexing |
|---|---|
Use Scenario: Scanning thermocouple, RTD, and pressure sensor outputs across 8 channels into a single high-resolution ADC in a PLC module. IC Role / Device Role / Timing Role: Dual 4-to-1 analog mux routes sensor signals sequentially while maintaining channel isolation and low offset drift. Use Value: Enables cost-effective 8-channel acquisition using one ADC instead of eight, with <−90dB crosstalk preventing inter-channel interference. |
Use Scenario: Routing redundant air-data sensor signals (pitot/static, angle-of-attack) to flight-control computers in DO-160-compliant avionics units. IC Role / Device Role / Timing Role: Provides fail-safe analog switching with guaranteed OFF-state isolation and <5nA off-leakage at +85°C. Use Value: Meets MIL-STD-704/DO-160 voltage transient immunity requirements via >2kV ESD protection and robust ±8V supply tolerance. |
| ATE Channel Expansion | Audio Signal Routing |
Use Scenario: Expanding I/O count in semiconductor test equipment by cascading multiple MAX350EAP+ devices via daisy-chained DOUT. IC Role / Device Role / Timing Role: Serially controlled mux acts as a scalable analog crosspoint matrix with synchronous CS-driven update across all units. Use Value: Achieves deterministic <480ns cycle time and 240ns CS lead/lag timing-critical for synchronized stimulus/response testing. |
Use Scenario: Selecting between microphone preamp outputs, line-level sources, or DAC channels in professional audio mixing consoles. IC Role / Device Role / Timing Role: Bidirectional SPST switch handles AC-coupled audio signals with rail-to-rail swing and <0.01% THD at 1kHz. Use Value: Delivers 100Ω on-resistance flatness (≤10Ω) across ±3V to ±5V signal range-preserving frequency response and minimizing harmonic distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADG732BRUZ | 32-channel, 1.8V–5.5V single-supply only; 4Ω on-resistance; no dual independent mux architecture | Best for high-channel-count, low-voltage portable instrumentation-not suitable for dual-rail or independent dual-path routing | Select when scaling beyond 8 channels on 3.3V systems; avoid if ±5V operation or isolated dual mux functionality is required. |
| TMUX6234RTER | Quad 2:1 mux, 10Ω on-resistance, ±16.5V supply support, but no serial interface-requires parallel GPIO control | Preferred for high-voltage industrial I/O modules needing robust fault protection, not for SPI-controlled compact designs | Choose for >±12V signal routing where GPIO availability permits; reject if serial configuration or space-constrained PCB layout is mandatory. |
Compared with ADG732BRUZ and TMUX6234RTER, MAX350EAP+ uniquely combines dual independent 4-to-1 topology, SPI daisy-chaining, and true dual-supply operation-making it optimal for space-constrained, multi-mux industrial controllers requiring deterministic timing and rail-to-rail analog fidelity.
Availability
MAX350EAP+ is available at Aetrix Electronics and suitable for industrial process monitoring, avionics sensor conditioning, and ATE channel expansion requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for MAX350EAP+ 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, automotive, and communications applications.
The MAX349/MAX350 product line targets high-accuracy, serially configurable analog signal routing in data-acquisition systems where low on-resistance match, ultra-low leakage, and robust dual-supply operation are essential.
FAQ
What is the operating temperature range of the MAX350EAP+?
The MAX350EAP+ is rated for operation from -40°C to +85°C, meeting industrial-grade environmental requirements. This extended range ensures reliable performance in harsh environments such as factory automation controllers and airborne avionics units, where ambient temperatures fluctuate significantly. The device's leakage current remains within specification (≤5nA at +85°C), preserving signal integrity under thermal stress.
Does the MAX350EAP+ support daisy-chaining with other MAX350EAP+ devices?
Yes, the MAX350EAP+ supports daisy-chaining via its DOUT pin, which outputs the first bit (D7) of the previously shifted-in data on the falling edge of SCLK. By connecting DOUT of one device to DIN of the next and tying all CS pins together, up to N devices can be configured with a single 8×N-bit serial stream. This eliminates address decoding logic and simplifies firmware for multi-mux systems.
How does the MAX350EAP+ handle rail-to-rail analog signals?
The MAX350EAP+ supports rail-to-rail analog signal handling from V− −2V to V+ +2V, enabling full-swing operation across its entire supply range. With ±5V supplies, it passes signals from −7V to +7V; with +5V/0V single supply, it handles 0V to +5V. This eliminates external level-shifting components in precision ADC front-ends and sensor interfaces where signal headroom is constrained.
What is the function of the RESET pin on the MAX350EAP+?
The RESET pin on the MAX350EAP+ provides asynchronous initialization: driving it LOW clears the internal 8-bit shift register to zero and forces all eight switches (NO0A–NO3A and NO0B–NO3B) into the OFF state. This guarantees a known, safe analog path configuration at power-up or after fault conditions-critical for safety-critical systems like flight controls or medical instrumentation where undefined states are unacceptable.
Can the MAX350EAP+ operate from a single +3.3V supply?
Yes, the MAX350EAP+ operates from a single +2.7V to +16V supply, including +3.3V. At +3.3V, on-resistance increases to 500Ω (typical), and analog signal range is 0V to +3.3V. Digital inputs remain compatible (0.8V/2.4V thresholds), and timing parameters-including 2.1MHz max SCLK-are maintained. This makes it viable for low-power portable instrumentation where supply voltage is constrained.
MAX350EAP+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Switch Circuit:
- SP4T
- Multiplexer/Demultiplexer Circuit:
- 4:1
- Number of Circuits:
- 2
- On-State Resistance (Max):
- 100Ohm
- Channel-to-Channel Matching (ΔRon):
- 16Ohm (Max)
- Voltage - Supply, Single (V+):
- 2.7V ~ 16V
- Voltage - Supply, Dual (V±):
- ±2.7V ~ 8V
- Switch Time (Ton, Toff) (Max):
- 275ns, 150ns
- -3db Bandwidth:
- -
- Charge Injection:
- 1pC
- Channel Capacitance (CS(off), CD(off)):
- 2pF, 2pF
- Current - Leakage (IS(off)) (Max):
- 100pA
- Crosstalk:
- -90dB @ 100kHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SSOP
MAX350EAP+ FAQ
1.How can I place an order for MAX350EAP+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX350EAP+ 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 MAX350EAP+ reliable?
The price and inventory of MAX350EAP+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX350EAP+ is usually 5 days.
3.What payment methods are accepted for MAX350EAP+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX350EAP+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX350EAP+?
MAX350EAP+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX350EAP+ 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 MAX350EAP+?
For technical support, including MAX350EAP+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX350EAP+ requirements.
6.How does Aetrix verify that MAX350EAP+ is sourced from the original manufacturer or authorized distributors?
All MAX350EAP+ 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 MAX350EAP+ meets industry standards.
7.What is the process for return or replacement of MAX350EAP+?
All MAX350EAP+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX350EAP+, 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 MAX350EAP+ part is unused and in its original packaging.
Return procedure for MAX350EAP+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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