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Analog Devices Inc./Maxim Integrated MAX395ENG+
- Part No.:
- MAX395ENG+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- -
- Datasheet:
-
MAX395ENG+.pdf
- Description:
- IC INTEGRATED CIRCUIT
- Quantity:
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Inventory:369
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Product details
Overview
MAX395ENG+ from Maxim Integrated is an 8-channel, serially controlled, single-pole/single-throw (SPST) analog switch IC with rail-to-rail signal handling, 100Ω max on-resistance (±5V supplies), 5Ω max channel-to-channel on-resistance match, and <0.1nA off-leakage at +25°C. It operates from ±2.7V to ±8V dual supplies or +2.7V to +16V single supply, and is used in precision analog signal routing for industrial data-acquisition systems.
For engineers reviewing the MAX395ENG+ datasheet, MAX395ENG+ pinout, MAX395ENG+ application, or MAX395ENG+ equivalent, this page delivers verified electrical specifications, SPI/QSPI/Microwire-compatible serial interface timing, daisy-chain capability, TTL/CMOS logic compatibility, and ESD-hardened (2kV) operation - all critical for high-reliability analog multiplexing and switching designs.
Technical Context
The MAX395ENG+ implements an 8-bit shift register with synchronous serial control via SCLK rising edge, CS-driven latch update, and DOUT for daisy-chaining. Its analog switches use matched CMOS topology enabling bidirectional conduction and flat on-resistance (≤10Ω variation over ±3V signal range).
It supports three-wire SPI™/QSPI™/Microwire™ protocols (CPOL=0, CPHA=0), features asynchronous RESET for global switch-off and register clear, and maintains functional integrity across -55°C to +125°C operating temperature range per its E-grade qualification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance (RON) | 100Ω max at ±5V supplies - ensures minimal signal attenuation in precision analog paths |
| On-Resistance Match (∆RON) | 5Ω max between channels - enables consistent gain/attenuation across multiplexed signals |
| Off-Leakage Current | 0.1nA max at +25°C - preserves accuracy in high-impedance sensor front-ends |
| Analog Signal Range | Rail-to-rail (V− to V+) - supports full dynamic range of bipolar or unipolar inputs without clipping |
| Supply Range | ±2.7V to ±8V dual or +2.7V to +16V single - simplifies power architecture in mixed-signal systems |
| ESD Protection | >2kV per Method 3015.7 - enhances robustness in manufacturing and field environments |
| Switch Turn-On/Off Time | 200ns/90ns typical (dual ±5V) - enables fast channel switching in real-time acquisition |
Pinout & Package
MAX395ENG+ is housed in a 24-pin narrow plastic DIP package (0.300" wide), rated for -55°C to +125°C operation. Pin 1 is SCLK; pins 5,7,9,11,14,16,18,20 are NO0–NO7; pins 6,8,10,12,13,15,17,19 are COM0–COM7; pin 21 is V−; pin 22 is DOUT; pin 23 is RESET; pin 24 is CS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCLK (Pin 1) | Serial clock input | Drives synchronous data capture on rising edge; compatible with SPI/QSPI/Microwire timing |
| DIN (Pin 3) | Serial data input | Accepts 8-bit control word; bit D7 controls NO7/COM7, D0 controls NO0/COM0 |
| CS (Pin 24) | Chip-select input | Active-low latch enable; rising edge updates all eight switch states simultaneously |
| RESET (Pin 23) | Asynchronous reset | Drives all switches OFF and clears internal shift register regardless of CS/SCLK state |
| DOUT (Pin 22) | Serial data output | Shift-register output for daisy-chaining multiple MAX395ENG+ devices without external logic |
| NO0–NO7 (Pins 5,7,9,11,14,16,18,20) | Analog switch terminals | Normally open contacts; interchangeable with COM pins for bidirectional signal routing |
| COM0–COM7 (Pins 6,8,10,12,13,15,17,19) | Analog switch terminals | Common nodes; paired with NOx to form independent SPST switches |
| V+ (Pin 2), V− (Pin 21), GND (Pin 4) | Analog supply rails | Define analog signal voltage limits; V− tied to GND enables single-supply operation |
Key Features
| Feature | Design Value |
|---|---|
| 8 independently controllable SPST switches | Enables flexible analog routing topologies including 8×1 mux, dual 4×2 differential mux, or quad SPDT configurations |
| SPI/QSPI/Microwire-compatible serial interface | Reduces MCU GPIO count and PCB trace count vs. parallel control; supports standard embedded controller peripherals |
| Rail-to-rail analog signal handling | Supports ±5V, ±3V, or 0–12V signal ranges without level-shifting, preserving SNR in precision measurement |
| Pin compatibility with MAX335 | Allows drop-in replacement in legacy designs using industry-standard 24-pin DIP footprint and signal mapping |
| Break-before-make timing (15ns typ) | Prevents momentary short-circuits during channel switching - critical for fault-tolerant signal path management |
| TTL/CMOS logic thresholds (0.8V/2.4V) | Ensures reliable digital control from 3.3V or 5V microcontrollers without level translators |
Applications
| Industrial Data-Acquisition Systems | Avionics Signal Routing |
|---|---|
Use Scenario: Multiplexing 8 thermocouple or RTD sensor inputs into a single ADC channel under harsh environmental conditions. IC Role / Device Role / Timing Role: Precision analog SPST switch providing low-leakage, rail-to-rail signal path selection with deterministic timing. Use Value: 0.1nA off-leakage prevents DC error accumulation; 100Ω RON ensures <0.01% gain error at 10kΩ source impedance. |
Use Scenario: Selecting between redundant flight-control sensor signals in airborne computing modules requiring DO-160 compliance. IC Role / Device Role / Timing Role: High-reliability analog switch with >2kV ESD protection and -55°C to +125°C operation. Use Value: Dual-supply support (±2.7V to ±8V) accommodates legacy avionics power rails; daisy-chain capability reduces wiring complexity. |
| ATE Equipment Channel Selection | Audio Signal Switching |
Use Scenario: Configuring test paths between DUT ports and instrumentation in automated semiconductor test handlers. IC Role / Device Role / Timing Role: Fast-switching (90ns tOFF), low-crosstalk (<-90dB) analog switch for high-throughput parametric testing. Use Value: 5Ω RON match ensures consistent stimulus/response across channels; break-before-make prevents signal contention. |
Use Scenario: Routing line-level audio signals between multiple sources (mic, DAC, Bluetooth) and amplifiers in pro-audio mixers. IC Role / Device Role / Timing Role: Low-distortion analog switch with flat on-resistance (≤10Ω variation) over audio band. Use Value: Charge injection ≤10pC minimizes audible pop/click during switching; rail-to-rail operation preserves headroom. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX335EPA+ | Pin-compatible 8-channel SPST switch but with parallel (not serial) control; higher on-resistance (120Ω max) | Requires 8 GPIOs instead of 3-wire interface; unsuitable for space-constrained or high-channel-count layouts | Select MAX335EPA+ only when deterministic parallel control latency is required and board space permits extra traces/GPIOs |
| ADG1408BRUZ | 8-channel SPST with 4.7Ω max RON, but requires 3.3V logic and lacks daisy-chain DOUT; no -55°C rating | Optimized for low-RON precision instrumentation, not extended temperature or legacy system upgrades | Choose ADG1408BRUZ for sub-5Ω RON needs in commercial-temp medical or test equipment where serial interface is optional |
Compared with MAX395ENG+, MAX335EPA+ trades serial simplicity for parallel determinism and higher RON, while ADG1408BRUZ offers lower resistance and better distortion specs but sacrifices military-grade temperature range and daisy-chain scalability.
Availability
MAX395ENG+ 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 MAX395ENG+ 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 MAX395ENG+ belongs to Maxim's precision analog switch product line, engineered specifically for serially controlled, high-reliability signal routing in environments requiring wide supply range, low leakage, and extended temperature operation.
FAQ
What is the maximum supply voltage range supported by the MAX395ENG+?
The MAX395ENG+ supports dual supplies from ±2.7V to ±8V or a single supply from +2.7V to +16V. This wide range allows direct interfacing with legacy ±5V, ±3V, or modern 3.3V/5V/12V systems without external level-shifting circuitry. The absolute maximum ratings specify V+ up to +17V and V− down to -17V, but continuous operation must stay within the specified functional ranges to ensure reliability and parameter compliance.
How does the MAX395ENG+ handle rail-to-rail analog signals?
The MAX395ENG+ supports rail-to-rail analog signal handling by allowing input voltages from V− to V+ on all NO and COM pins. Its internal CMOS switch structure and ESD protection diodes are designed to pass signals across the full supply range without clipping or distortion, provided the analog inputs remain within (V− − 2V) to (V+ + 2V) per absolute maximum ratings. This enables seamless integration in bipolar and unipolar signal chains.
Can multiple MAX395ENG+ devices be connected in series for expanded channel count?
Yes, the MAX395ENG+ supports daisy-chaining via its DOUT pin. When CS is held low, data shifted into DIN propagates through the internal 8-bit shift register and emerges at DOUT after eight clocks. Connecting DOUT of one MAX395ENG+ to DIN of the next allows cascading any number of devices using a single 3-wire interface. On the rising edge of CS, all devices simultaneously update their switch states from the most recent 8 bits received.
What is the function of the RESET pin on the MAX395ENG+?
The RESET pin on the MAX395ENG+ provides asynchronous global control: driving it low forces all eight switches to the OFF state and resets the internal shift register to zero, regardless of CS or SCLK state. This feature enables safe power-up initialization, emergency signal isolation, or recovery from communication errors. RESET must be driven between GND and V+ - exceeding those rails risks damage due to lack of clamping diodes on this pin.
Is the MAX395ENG+ pin-compatible with other industry-standard analog switches?
Yes, the MAX395ENG+ is explicitly pin-compatible with the MAX335, sharing identical 24-pin narrow DIP pinout, terminal functions, and supply requirements. This allows direct replacement in existing MAX335-based designs while adding serial control capability. However, it is not pin-compatible with the MAX349 or MAX350, which use 18-pin packages and different control architectures.
MAX395ENG+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Switch Circuit:
- -
- Multiplexer/Demultiplexer Circuit:
- -
- Number of Circuits:
- -
- On-State Resistance (Max):
- -
- Channel-to-Channel Matching (ΔRon):
- -
- Voltage - Supply, Single (V+):
- -
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- -
- -3db Bandwidth:
- -
- Charge Injection:
- -
- Channel Capacitance (CS(off), CD(off)):
- -
- Current - Leakage (IS(off)) (Max):
- -
- Crosstalk:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX395ENG+ FAQ
1.How can I place an order for MAX395ENG+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX395ENG+ 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 MAX395ENG+ reliable?
The price and inventory of MAX395ENG+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX395ENG+ is usually 5 days.
3.What payment methods are accepted for MAX395ENG+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX395ENG+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX395ENG+?
MAX395ENG+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX395ENG+ 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 MAX395ENG+?
For technical support, including MAX395ENG+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX395ENG+ requirements.
6.How does Aetrix verify that MAX395ENG+ is sourced from the original manufacturer or authorized distributors?
All MAX395ENG+ 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 MAX395ENG+ meets industry standards.
7.What is the process for return or replacement of MAX395ENG+?
All MAX395ENG+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX395ENG+, 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 MAX395ENG+ part is unused and in its original packaging.
Return procedure for MAX395ENG+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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