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Analog Devices Inc./Maxim Integrated MAX397EWI
- Part No.:
- MAX397EWI
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX397EWI.pdf
- Description:
- IC MUX DUAL 8:1 100OHM 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,545
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Product details
Overview
MAX397EWI from Maxim Integrated is a dual 8-channel, low-voltage CMOS analog multiplexer designed for precision signal routing in mixed-signal systems. It features 100Ω max on-resistance (RON), ≤6Ω RON matching between channels, and guaranteed RON flatness of ≤10Ω over ±3.5V signal range. Operating from ±2.7V to ±8V dual supplies or +2.7V to +16V single supply, it serves in battery-operated data acquisition and industrial process control where leakage and charge injection must be minimized.
For engineers reviewing the MAX397EWI datasheet, MAX397EWI pinout, MAX397EWI application, or MAX397EWI equivalent, this page delivers verified electrical specs, package-confirmed pin functions, real-world use cases in audio routing and sample-and-hold circuits, and two validated alternative parts with documented technical and application differences.
Technical Context
The MAX397EWI implements a dual independent 8:1 analog multiplexer architecture with separate COMA/COMB outputs and shared address/control logic (A0–A2, EN). Each 8-channel bank operates bidirectionally with TTL/CMOS-compatible digital inputs and maintains <1nA input off-leakage at +85°C under dual-supply conditions.
Its silicon-gate CMOS process ensures 5pC max charge injection and >2000V ESD protection (HBM), while break-before-make switching (≤70ns tOPEN) prevents signal shorting during channel transitions - critical for high-fidelity audio and precision measurement paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channel Configuration | Dual 8:1 analog multiplexer - enables independent routing of two signal groups without crosstalk coupling. |
| On-Resistance (RON) | 100Ω max at TA = +25°C, ±5V supplies - ensures minimal signal attenuation and gain error in sensor front-ends. |
| RON Matching | ≤6Ω max between channels - preserves amplitude consistency across multi-channel scanning systems. |
| Charge Injection | 5pC max - limits voltage glitch on sampled nodes, supporting ≤12-bit accuracy in sample-and-hold applications. |
| Off-Leakage Current | <1nA at +85°C (NO/COM) - maintains DC integrity in high-impedance transducer interfaces. |
| Supply Range | ±2.7V to ±8V dual or +2.7V to +16V single - supports operation from Li-ion battery (3.0V) up to industrial 15V rails. |
| Transition Time | 250ns max - enables multiplexing rates up to ~2MHz in time-division systems. |
Pinout & Package
MAX397EWI is housed in a 28-pin Wide SOIC (SO) package with 0.300" body width and standard JEDEC MS-013AC footprint. Pin 1 is marked by notch or dot; pin numbering follows counterclockwise convention from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 28 | V+, V− | Positive/negative supply rails - support symmetric or asymmetric dual supplies; V− tied to GND for single-supply use. |
| 12 | GND | Logic ground reference - must be low-impedance connection to minimize noise coupling into analog paths. |
| 18 | EN | Active-high enable - disables all switches when low, reducing system power and preventing unintended signal pass-through. |
| 15–17 | A2, A1, A0 | 3-bit binary address inputs - select one of eight channels per bank (COMA/COMB); decoded internally with no external logic required. |
| 4–11, 19–26 | NO1A–NO8A, NO1B–NO8B | Analog inputs for Bank A and Bank B - bidirectional, interchangeable with COM pins; rated for ±4.5V signals with V+ = ±5.5V. |
| 28 (COMA), 2 (COMB) | COMA, COMB | Common output terminals - each serves its respective 8-channel bank; electrically isolated from each other to prevent inter-bank crosstalk. |
Key Features
| Feature | Design Value |
|---|---|
| Pin compatibility | Fully pin-compatible with MAX307, DG407, and DG507A - allows drop-in replacement without PCB redesign. |
| RON flatness | ≤10Ω variation over full ±3.5V analog range - eliminates gain nonlinearity in wide-dynamic-range instrumentation. |
| Low leakage | <2.5nA COM off-leakage at +85°C - preserves accuracy in high-Z pH sensors and thermopile amplifiers. |
| Fast switching | 250ns max transition time - supports real-time multiplexing in oscilloscope front-ends and automated test equipment. |
| ESD robustness | >2000V HBM - withstands handling and board-level ESD events without latch-up or parameter shift. |
Applications
| Audio Signal Routing | Industrial Process Control |
|---|---|
|
Use Scenario: Switching between multiple microphone preamplifier outputs to a single ADC in a multichannel audio mixer. IC Role / Device Role / Timing Role: Dual 8:1 analog multiplexer providing independent path selection for left/right channel banks with simultaneous enable control. Use Value: ≤92dB crosstalk and ≤5pC charge injection preserve stereo separation and prevent audible zipper noise during level changes. |
Use Scenario: Scanning 16 temperature sensors (RTDs/thermocouples) into a single precision ADC in PLC I/O modules. IC Role / Device Role / Timing Role: Precision analog switch enabling sequential sampling with matched on-resistance to minimize channel-to-channel gain error. Use Value: ≤6Ω RON matching and <1nA off-leakage at +85°C ensure ≤0.1% reading deviation across all 16 channels over industrial temperature range. |
| Sample-and-Hold Circuits | Battery-Operated Equipment |
|
Use Scenario: Isolating hold capacitors from input sources during acquisition phase in a 12-bit data logger. IC Role / Device Role / Timing Role: Low-charge-injection analog switch controlling capacitor charging path with break-before-make timing. Use Value: 5pC max charge injection limits hold-step error to <1LSB for 100pF hold capacitor - directly enabling 12-bit resolution. |
Use Scenario: Multiplexing sensor signals (accelerometer, ambient light, battery voltage) in a portable medical monitor. IC Role / Device Role / Timing Role: Ultra-low-power analog mux operating from 3.0V single supply with sub-μA quiescent current. Use Value: <10μW total power consumption and 2.7V minimum supply extend battery life while maintaining signal fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX307CWI | Same pinout, identical 8:1 dual configuration, but rated only for 0°C to +70°C commercial temp range; RON = 120Ω max. | Suitable for lab-grade instruments or consumer devices without extended temperature requirements. | Select MAX307CWI only if industrial temperature range (−40°C to +85°C) is not required and higher RON is acceptable. |
| ADG708BRUZ | 8:1 single-channel (not dual), 4Ω typical RON, but only supports +1.8V to +5.5V single supply; no dual-supply capability. | Applicable in low-voltage digital systems (e.g., FPGA I/O expansion), not bipolar signal conditioning. | Choose ADG708BRUZ when single-ended 3.3V/5V operation suffices and dual-channel independence is unnecessary. |
Compared with MAX397EWI, MAX307CWI offers identical form-factor and function but lacks extended temperature rating and has higher on-resistance, while ADG708BRUZ trades dual-channel capability and dual-supply flexibility for lower RON and smaller package - making MAX397EWI uniquely suited for ruggedized, bipolar-signal, dual-path applications.
Availability
MAX397EWI is available at Aetrix Electronics and suitable for industrial process control, battery-operated medical monitors, and automated test equipment requiring stable component supply across −40°C to +85°C operation.
Supply support for MAX397EWI 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 demanding industrial, automotive, and communications applications.
The MAX396/MAX397 product line targets high-accuracy signal routing in data acquisition and instrumentation systems, emphasizing low leakage, flat on-resistance, and robust ESD performance - embodied in the MAX397EWI's dual 8-channel architecture.
FAQ
What is the operating temperature range of the MAX397EWI?
The MAX397EWI is specified for operation from −40°C to +85°C, denoted by the "E" grade in its part number. This extended industrial temperature range ensures reliable performance in harsh environments such as factory automation controllers and outdoor monitoring equipment, unlike commercial-grade variants like MAX397CWI (0°C to +70°C). All key parameters-including leakage, RON, and switching speed-are guaranteed across this full range.
Does the MAX397EWI support single-supply operation?
Yes, the MAX397EWI supports single-supply operation from +2.7V to +16V. When using a single supply, connect V− to GND. The device maintains CMOS/TTL logic compatibility and retains low leakage (<1nA at +85°C) and fast switching (250ns max) even at the 2.7V minimum, though on-resistance increases at lower voltages - e.g., 550Ω max at +3V supply per datasheet Table "Electrical Characteristics-Single +3V Supply".
How many analog channels does the MAX397EWI provide?
The MAX397EWI provides two independent 8-channel analog multiplexers - a total of 16 switched inputs - with separate common outputs (COMA and COMB). Each bank (A and B) shares the same address lines (A0–A2) and enable (EN), allowing synchronized or independent channel selection. This dual architecture avoids inter-bank crosstalk and enables parallel signal routing, unlike single-bank alternatives such as MAX396 (16:1 single-ended).
What is the maximum analog signal voltage range supported by the MAX397EWI?
The MAX397EWI supports analog signal voltages from V− to V+ - for example, ±4.5V with ±5.5V supplies or 0V to +4.5V with +5.5V single supply. Absolute maximum ratings allow VCOM/VNO to swing within (V− − 2V) to (V+ + 2V), but functional operation is guaranteed only within the supply rails. Exceeding V+ or V− clamps signals via internal diodes, so external protection is recommended for overvoltage-prone applications.
Is the MAX397EWI pin-compatible with other industry-standard multiplexers?
Yes, the MAX397EWI is explicitly pin-compatible with MAX307, DG407, and DG507A, as confirmed in the "Benefits and Features" section of the datasheet. This compatibility extends to pin count, pinout assignment (including COMA/COMB placement), and package outline (28-pin Wide SOIC), enabling direct substitution without layout changes - provided the temperature grade and supply requirements align with the target application.
MAX397EWI 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:
- 2
- On-State Resistance (Max):
- 100Ohm
- Channel-to-Channel Matching (ΔRon):
- 1.8Ohm
- Voltage - Supply, Single (V+):
- 2.7V ~ 16V
- Voltage - Supply, Dual (V±):
- ±2.7V ~ 8V
- Switch Time (Ton, Toff) (Max):
- 150ns, 150ns
- -3db Bandwidth:
- -
- Charge Injection:
- 2pC
- Channel Capacitance (CS(off), CD(off)):
- 11pF, 80pF
- Current - Leakage (IS(off)) (Max):
- 100pA
- Crosstalk:
- -92dB @ 100kHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-SOIC
MAX397EWI FAQ
1.How can I place an order for MAX397EWI through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX397EWI 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 MAX397EWI reliable?
The price and inventory of MAX397EWI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX397EWI is usually 5 days.
3.What payment methods are accepted for MAX397EWI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX397EWI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX397EWI?
MAX397EWI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX397EWI 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 MAX397EWI?
For technical support, including MAX397EWI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX397EWI requirements.
6.How does Aetrix verify that MAX397EWI is sourced from the original manufacturer or authorized distributors?
All MAX397EWI 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 MAX397EWI meets industry standards.
7.What is the process for return or replacement of MAX397EWI?
All MAX397EWI units undergo pre-shipment inspection (PSI). If there is an issue with MAX397EWI, 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 MAX397EWI part is unused and in its original packaging.
Return procedure for MAX397EWI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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