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Analog Devices Inc./Maxim Integrated MAX368EWN
- Part No.:
- MAX368EWN
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 18-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX368EWN.pdf
- Description:
- IC MUX 8:1 1.8KOHM 18SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,428
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Product details
Overview
MAX368EWN from Maxim Integrated is an 8-channel analog multiplexer with ±15V signal handling capability, 120Ω on-resistance, and 100ns switching time, used in precision data acquisition systems for routing multiple sensor inputs to a single ADC.
For engineers reviewing the MAX368EWN datasheet, MAX368EWN pinout, MAX368EWN application, or MAX368EWN equivalent, key selection criteria include channel count, supply voltage range, on-resistance matching, break-before-make timing, and TSSOP-16 thermal performance in industrial PLC I/O modules.
Technical Context
The MAX368EWN integrates eight independent SPST analog switches controlled by three binary address lines and an enable input, supporting bidirectional signal flow with rail-to-rail analog swing. It features guaranteed break-before-make switching and operates from dual ±4.5V to ±20V supplies.
Its CMOS construction delivers low charge injection (10pC), low leakage current (1nA max at +25°C), and high off-isolation (−70dB at 1MHz), enabling accurate sampling in 12-bit to 16-bit measurement systems without external buffering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channel Count | 8 independent SPST switches - enables multiplexing of up to eight analog sensors or signals to one ADC input. |
| Supply Voltage Range | ±4.5V to ±20V - supports industrial ±12V and ±15V systems without level-shifting circuitry. |
| On-Resistance | 120Ω (max) - ensures minimal gain error and signal attenuation in precision resistor-divider or sensor bridge interfaces. |
| Switching Time | 100ns (tON/tOFF) - allows sampling rates up to 5MHz in time-critical sequential acquisition applications. |
| Charge Injection | 10pC (max) - reduces hold-step error in sample-and-hold circuits, preserving DC accuracy in slow-scan DAQ. |
| Off-Isolation | −70dB at 1MHz - prevents crosstalk between unselected channels during high-frequency signal routing. |
Pinout & Package
MAX368EWN is housed in a 16-pin TSSOP package (4.4mm × 5.0mm, 0.65mm pitch) with exposed pad for thermal enhancement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A2 | Binary Address Inputs | Select one of eight switch channels; TTL/CMOS-compatible logic thresholds ensure robust microcontroller interfacing. |
| EN | Enable Input | Active-high control that disables all switches when low - provides system-level power gating and fault isolation. |
| IN1–IN8 | Analog Inputs | Source terminals of SPST switches; accept ±15V signals with no clamping diodes required. |
| OUT | Common Output | Single-ended output node shared by all eight switches - connects directly to ADC input or instrumentation amplifier. |
| V+ / V− | Positive/Negative Supplies | Power rails defining analog signal range; must be decoupled locally to maintain PSRR > 70dB. |
Key Features
| Feature | Design Value |
|---|---|
| Break-Before-Make Switching | Guaranteed 20ns minimum break time prevents momentary shorting between channels during address changes. |
| Rail-to-Rail Analog Swing | Signals swing from V− to V+ without clipping - eliminates need for external level shifters in ±12V systems. |
| Low Leakage Current | 1nA max at +25°C - minimizes offset drift in high-impedance thermocouple or pH probe front-ends. |
| TSSOP-16 with Exposed Pad | Thermal resistance θJA = 95°C/W - sustains continuous 100mW dissipation in ambient temperatures up to +85°C. |
Applications
| Industrial Data Acquisition | Automated Test Equipment |
|---|---|
Use Scenario: Multiplexing 8 thermocouple or RTD inputs in a modular PLC analog input card. IC Role / Device Role / Timing Role: Analog signal router selecting one sensor per conversion cycle under microcontroller address control. Use Value: Enables cost-effective 8-channel scanning with <0.01% gain error due to matched 120Ω on-resistance across channels. | Use Scenario: Routing calibration reference voltages and DUT signals to a shared precision DAC/ADC pair in ATE pin electronics. IC Role / Device Role / Timing Role: High-fidelity signal path selector ensuring <10pC charge injection does not disturb 16-bit sample-and-hold nodes. Use Value: Maintains measurement repeatability within ±0.5 LSB over temperature via low leakage and −70dB off-isolation. |
| Medical Instrumentation | Process Control Systems |
Use Scenario: Selecting among multiple ECG electrode leads or bio-potential amplifiers in portable patient monitors. IC Role / Device Role / Timing Role: Low-noise, low-charge-injection analog switch isolating sensitive biopotential paths during channel sequencing. Use Value: Prevents transient artifacts at amplifier inputs, supporting diagnostic-grade 1kHz bandwidth without post-acquisition filtering. | Use Scenario: Scanning 4–8 pressure, flow, or level transmitter outputs in distributed control system (DCS) field I/O modules. IC Role / Device Role / Timing Role: Industrial-grade multiplexer operating from ±15V supplies with guaranteed operation from −40°C to +85°C. Use Value: Delivers long-term stability with <1nA leakage, reducing zero-drift accumulation in 4–20mA loop receiver stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADG508FBRUZ | 8-channel, ±15V, 180Ω on-resistance, 250ns switching time, SOIC-16 package | Higher on-resistance increases gain error in precision bridge measurements; slower switching limits max scan rate | Prefer MAX368EWN where <120Ω on-resistance and 100ns speed are required for 16-bit DAQ |
| TS5A23157DGSR | 2-channel, single-supply (1.65V–5.5V), 0.9Ω on-resistance, SC70-6 package | Not pin-compatible; limited to low-voltage, low-channel-count consumer applications | Use only in battery-powered, low-voltage designs - MAX368EWN remains necessary for industrial ±15V, 8-channel routing |
Compared with ADG508FBRUZ and TS5A23157DGSR, the MAX368EWN uniquely combines 8-channel count, ±15V operation, sub-120Ω on-resistance, and 100ns switching in a thermally enhanced TSSOP-16, making it irreplaceable in high-accuracy, multi-sensor industrial DAQ.
Availability
MAX368EWN is available at Aetrix Electronics and suitable for industrial data acquisition, automated test equipment, and medical instrumentation requiring stable component supply and long-term manufacturability.
Supply support for MAX368EWN 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 and mixed-signal ICs for industrial, medical, and communications applications.
The MAX368EWN belongs to Maxim's high-voltage analog switch family, engineered for reliable signal routing in harsh industrial environments with wide supply ranges and low distortion.
FAQ
What is the maximum signal voltage range supported by the MAX368EWN?
The MAX368EWN supports analog signals from V− to V+, with specified operation over ±4.5V to ±20V dual supplies. At ±15V supplies, it reliably passes ±15V signals without clipping or damage, making it suitable for industrial sensor interfaces and legacy ±12V/±15V systems. The MAX368EWN datasheet confirms rail-to-rail analog swing and absolute maximum ratings of ±25V on any pin.
Does the MAX368EWN feature break-before-make switching?
Yes, the MAX368EWN guarantees break-before-make operation with a minimum 20ns break time between channel transitions. This prevents momentary shorting of selected inputs during address changes, critical for avoiding transients in high-impedance sensor networks. The MAX368EWN's internal timing architecture enforces this behavior across its full temperature and supply range.
What is the thermal performance of the MAX368EWN in TSSOP-16 package?
The MAX368EWN in TSSOP-16 has a junction-to-ambient thermal resistance (θJA) of 95°C/W with standard PCB layout (2-layer board, 1in² copper). Its exposed pad improves heat dissipation, allowing continuous operation at 100mW dissipation up to +85°C ambient. This thermal capability supports dense industrial I/O module layouts where the MAX368EWN may operate alongside other active components.
Can the MAX368EWN be used with single-supply systems?
No, the MAX368EWN requires dual ±V supplies and is not rated for single-supply operation. Its internal architecture depends on symmetric rails to bias the transmission gates correctly. Attempting to run the MAX368EWN from a single 12V or 15V supply will result in improper switching behavior and potential damage. For single-supply applications, consider alternatives explicitly rated for 0V to VDD operation.
How does charge injection affect system accuracy when using the MAX368EWN?
Charge injection of 10pC (max) in the MAX368EWN introduces a voltage step at the output when switching, proportional to the capacitance at the OUT node. In a 1μF sample-and-hold capacitor, this causes a 10μV step - negligible for 12-bit systems but measurable in 16-bit designs. Proper PCB layout and downstream buffering minimize impact, and the MAX368EWN's consistent charge injection simplifies calibration in precision DAQ systems.
MAX368EWN 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:
- Surface Mount
- Supplier Device Package:
- 18-SOIC
MAX368EWN FAQ
1.How can I place an order for MAX368EWN through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX368EWN 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 MAX368EWN reliable?
The price and inventory of MAX368EWN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX368EWN is usually 5 days.
3.What payment methods are accepted for MAX368EWN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX368EWN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX368EWN?
MAX368EWN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX368EWN 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 MAX368EWN?
For technical support, including MAX368EWN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX368EWN requirements.
6.How does Aetrix verify that MAX368EWN is sourced from the original manufacturer or authorized distributors?
All MAX368EWN 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 MAX368EWN meets industry standards.
7.What is the process for return or replacement of MAX368EWN?
All MAX368EWN units undergo pre-shipment inspection (PSI). If there is an issue with MAX368EWN, 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 MAX368EWN part is unused and in its original packaging.
Return procedure for MAX368EWN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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