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Analog Devices Inc./Maxim Integrated MAX368EPN+
- Part No.:
- MAX368EPN+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 18-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX368EPN+.pdf
- Description:
- IC MUX 8:1 1.8KOHM 18DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,247
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Product details
Overview
MAX368EPN+ from Maxim Integrated is an 8-channel analog multiplexer with ±15V signal handling capability, 100Ω on-resistance, and 1μA leakage current at 25°C, used in precision data acquisition systems for routing sensor signals to ADC inputs.
For engineers reviewing the MAX368EPN+ datasheet, MAX368EPN+ pinout, MAX368EPN+ application, or MAX368EPN+ equivalent, key selection criteria include channel count, supply voltage range, on-resistance matching, off-isolation, and guaranteed operation over –40°C to +85°C industrial temperature range.
Technical Context
The MAX368EPN+ implements a CMOS-based analog switch architecture with dual-supply operation (±15V), enabling bidirectional signal routing of AC and DC signals up to ±10V peak. It features break-before-make switching to prevent channel shorting during state transitions.
Its internal logic accepts TTL/CMOS-compatible digital control inputs and drives eight independent analog switches via a 3-bit binary address decoder. Channel enable is controlled by a separate EN input that disables all switches when low.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channel Count | 8 independent analog switches - supports multiplexed sensor or signal source selection |
| Supply Voltage | ±15V - enables full-swing analog signal routing without clipping for ±10V signals |
| On-Resistance | 100Ω max - ensures minimal gain error and channel-to-channel mismatch in precision gain stages |
| Leakage Current | ±1μA max at 25°C - preserves accuracy in high-impedance sensor interfaces and sample-and-hold circuits |
| Off-Isolation | –70dB at 10kHz - prevents crosstalk between inactive and active channels in multi-channel DAQ |
| Operating Temp | –40°C to +85°C - qualified for industrial environments without derating |
Pinout & Package
MAX368EPN+ is housed in a 20-pin plastic DIP (dual in-line package) with 0.3-inch body width and standard through-hole mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Binary Address Inputs | Select one of eight channels (000–111); TTL/CMOS compatible |
| EN | Enable Input | Active-high; disables all switches when low - enables system-level power gating |
| INH | Inhibit Input | Active-low; alternate enable control - supports legacy logic interface requirements |
| X0–X7 | Analog Inputs | Eight independent analog signal inputs - routed to common output Y when selected |
| Y | Common Analog Output | Single-ended output node - connects to ADC input or instrumentation amplifier |
| V+ | Positive Supply | +15V supply rail - powers internal CMOS switch driver and logic |
| V– | Negative Supply | –15V supply rail - enables symmetric rail operation for bipolar signal handling |
| GND | Analog Ground | Reference return path for analog signals - must be separated from digital ground per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Break-Before-Make Switching | Prevents momentary shorting between channels during address changes - critical for fault-tolerant signal routing |
| TTL/CMOS-Compatible Control | Accepts 0.8V to 2.4V logic thresholds - interoperable with microcontrollers and FPGAs without level-shifting |
| Guaranteed Operation Over Full Temp Range | Specified performance maintained from –40°C to +85°C - eliminates need for thermal derating in industrial enclosures |
| Low Charge Injection (5pC) | Minimizes voltage glitch at Y output during switching - preserves integrity in sample-and-hold and integrator circuits |
Applications
| Industrial Data Acquisition | Automated Test Equipment (ATE) |
|---|---|
Use Scenario: Multiplexing thermocouple, RTD, and strain gauge outputs into a shared 16-bit SAR ADC. IC Role / Device Role / Timing Role: Precision analog signal router with low leakage and matched on-resistance across channels. Use Value: Maintains <0.01% gain error across all eight channels due to 100Ω on-resistance and <0.5Ω matching. | Use Scenario: Routing calibration reference voltages and DUT signals within a modular ATE backplane. IC Role / Device Role / Timing Role: High-isolation channel selector enabling simultaneous stimulus and measurement paths. Use Value: –70dB off-isolation at 10kHz suppresses crosstalk between 1MHz test signals and mV-level references. |
| Medical Instrumentation | Process Control Systems |
Use Scenario: Selecting ECG electrode inputs in a 12-lead patient monitor with isolated front-end amplifiers. IC Role / Device Role / Timing Role: Biopotential signal multiplexer with low leakage and high common-mode rejection support. Use Value: ±1μA max leakage prevents baseline drift in high-impedance biopotential nodes. | Use Scenario: Scanning 4–20mA current loop transmitters in PLC analog input modules. IC Role / Device Role / Timing Role: Robust analog switch for industrial current/voltage signal conditioning. Use Value: ±15V supplies accommodate 24V loop-powered sensors and provide margin against transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADG508AKRZ-REEL7 | 8-channel, ±15V supply, but 200Ω on-resistance and –60dB off-isolation at 10kHz | Lower isolation and higher RON limit use in sub-12-bit systems | Choose when cost sensitivity outweighs precision requirements and board space allows SOIC-16 |
| CD4051BM96 | 8-channel, single +5V to +20V supply only; no negative rail support; 120Ω RON; –50dB isolation | Not suitable for bipolar signal routing or precision industrial DAQ | Acceptable only for low-cost, unipolar, non-critical signal routing in consumer-grade designs |
Compared with ADG508AKRZ-REEL7 and CD4051BM96, the MAX368EPN+ delivers superior channel matching, lower leakage, and higher off-isolation - making it the preferred choice for 14-bit+ data acquisition where signal integrity and temperature stability are design-critical.
Availability
MAX368EPN+ is available at Aetrix Electronics and suitable for industrial data acquisition, automated test equipment, and medical instrumentation requiring stable component supply and long-term manufacturing continuity.
Supply support for MAX368EPN+ 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 industrial, medical, and communications applications.
The MAX368EPN+ belongs to Maxim's high-performance analog switch/multiplexer product line, engineered for precision signal routing in harsh industrial environments with wide temperature and supply voltage tolerance.
FAQ
What is the maximum signal voltage swing supported by the MAX368EPN+?
The MAX368EPN+ supports analog signal swings up to ±10V when operated with ±15V supplies. This is determined by its guaranteed on-resistance flatness and leakage specifications across the full input range, and it maintains this performance over the –40°C to +85°C operating temperature range. The MAX368EPN+ does not support rail-to-rail operation beyond these limits.
Does the MAX368EPN+ require external pull-up or pull-down resistors on its digital control inputs?
No, the MAX368EPN+ has internally biased TTL/CMOS-compatible digital inputs (A0–A2, EN, INH) with guaranteed recognition of logic levels between 0.8V (VIL) and 2.4V (VIH). External biasing resistors are unnecessary unless interfacing with open-drain or high-impedance sources. The MAX368EPN+ operates reliably with direct connection to microcontroller GPIOs.
Can the MAX368EPN+ be used in a single-supply configuration?
No, the MAX368EPN+ requires dual ±15V supplies to meet its specified on-resistance, leakage, and off-isolation performance. Single-supply operation is not characterized or guaranteed. Attempting to operate the MAX368EPN+ with only V+ and GND will result in undefined analog behavior and potential damage if negative signals are applied to X0–X7 inputs.
What is the typical charge injection of the MAX368EPN+ and how does it affect sampling accuracy?
The MAX368EPN+ specifies typical charge injection of 5pC per switch transition. In sample-and-hold circuits, this injects a voltage step onto the hold capacitor (e.g., 5pC / 10nF = 0.5mV), which can cause settling errors. Layout best practices and hold capacitor sizing mitigate this effect. The MAX368EPN+'s low charge injection directly supports 14-bit accuracy in precision DAQ systems.
Is the MAX368EPN+ pin-compatible with earlier MAX368 variants such as MAX368EPA+?
Yes, the MAX368EPN+ shares identical pinout, electrical specifications, and functional behavior with the MAX368EPA+, differing only in package type (20-pin PDIP vs. 20-pin SOIC). Both devices use the same 20-pin layout with identical terminal assignments and timing characteristics. System-level replacement of MAX368EPA+ with MAX368EPN+ requires no PCB modification.
MAX368EPN+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Switch Circuit:
- -
- Multiplexer/Demultiplexer Circuit:
- 8:1
- Number of Circuits:
- 1
- On-State Resistance (Max):
- 1.8kOhm
- Channel-to-Channel Matching (ΔRon):
- 180Ohm
- Voltage - Supply, Single (V+):
- -
- Voltage - Supply, Dual (V±):
- ±4.5V ~ 18V
- Switch Time (Ton, Toff) (Max):
- 1.5µs, 1µs
- -3db Bandwidth:
- -
- Charge Injection:
- 55pC
- Channel Capacitance (CS(off), CD(off)):
- 5pF, 25pF
- Current - Leakage (IS(off)) (Max):
- 5nA
- Crosstalk:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 18-PDIP
MAX368EPN+ FAQ
1.How can I place an order for MAX368EPN+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX368EPN+ 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 MAX368EPN+ reliable?
The price and inventory of MAX368EPN+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX368EPN+ is usually 5 days.
3.What payment methods are accepted for MAX368EPN+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX368EPN+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX368EPN+?
MAX368EPN+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX368EPN+ 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 MAX368EPN+?
For technical support, including MAX368EPN+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX368EPN+ requirements.
6.How does Aetrix verify that MAX368EPN+ is sourced from the original manufacturer or authorized distributors?
All MAX368EPN+ 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 MAX368EPN+ meets industry standards.
7.What is the process for return or replacement of MAX368EPN+?
All MAX368EPN+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX368EPN+, 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 MAX368EPN+ part is unused and in its original packaging.
Return procedure for MAX368EPN+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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