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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:186
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Product details
Overview
The 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 (flat over ±3.5V signal range), <1nA input off-leakage at +85°C, and 5pC max charge injection-enabling high-accuracy data acquisition and low-distortion audio switching in industrial and test equipment.
For engineers reviewing the MAX397EWI+ datasheet, MAX397EWI+ pinout, MAX397EWI+ application, or MAX397EWI+ equivalent, this page delivers verified electrical specs, package-validated pin functions, real-world use cases, and two confirmed alternative parts with documented functional and application-level differences.
Technical Context
The MAX397EWI+ implements a dual independent 8:1 analog mux architecture with separate COMA/COMB outputs and shared A0–A2 address + EN control lines. Each channel maintains matched on-resistance (≤6Ω max between channels) and flat RON (≤10Ω variation over full signal swing), critical for multichannel measurement consistency.
It operates from single +2.7V to +16V or dual ±2.7V to ±8V supplies while preserving TTL/CMOS logic compatibility, fast transition time (<250ns), and break-before-make timing (≤70ns). ESD protection exceeds 2000V per Method 3015.7, and substrate is tied to V+ for robust latch-up immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channel Count | Dual 8-channel (independent A/B paths) |
| On-Resistance (RON) | 100Ω max at +25°C; ensures minimal signal attenuation and gain error in precision sensor interfaces |
| RON Matching | 6Ω max between channels; enables accurate ratiometric measurements across multiple inputs |
| Charge Injection | 5pC max; limits voltage glitch on sample-and-hold capacitors during channel switching |
| Off-Leakage Current | <1nA at +85°C (input); preserves accuracy in high-impedance sensor front-ends |
| Supply Range | +2.7V to +16V single or ±2.7V to ±8V dual; supports battery-powered and industrial rail flexibility |
| Transition Time | <250ns; enables >1MHz multiplexed sampling without inter-channel settling penalty |
Pinout & Package
MAX397EWI+ is supplied in a 28-pin Wide SO (SOIC-W) package, 0.300" wide, with standard JEDEC MS-013AC footprint and gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive supply input | Accepts +2.7V to +16V; substrate connection point for latch-up immunity |
| V- | Negative supply input | Accepts -16V to -2.7V in dual mode; tied to GND in single-supply operation |
| GND | Logic ground reference | Reference for digital inputs (A0–A2, EN) and internal biasing |
| EN | Active-high enable input | Disables all switches when low; reduces leakage and power to <1µA |
| A0–A2 | 3-bit binary address inputs | Selects one of eight channels per bank (A or B); CMOS/TTL compatible |
| COMA / COMB | Independent common output terminals | Each serves its own 8-channel bank; bidirectional signal path with no polarity restriction |
| NO1A–NO8A / NO1B–NO8B | Analog input/output terminals | Bidirectional, interchangeable with COM; support rail-to-rail analog signals within V− to V+ |
Key Features
| Feature | Design Value |
|---|---|
| Pin-compatible replacement | Direct drop-in for MAX307, DG407, and DG507A-no PCB redesign required |
| Low charge injection | 5pC max minimizes hold-step error in precision sample-and-hold circuits |
| RON flatness | 10Ω max variation over ±3V signal range ensures consistent gain across full input span |
| High-temperature leakage control | <2.5nA total off-leakage at +85°C enables reliable operation in industrial environments |
| Wide supply flexibility | Operates down to +2.7V single supply-ideal for portable instrumentation with Li-ion or coin-cell sources |
Applications
| Automatic Test Equipment | Audio Signal Routing |
|---|---|
Use Scenario: Multiplexing 16 sensor outputs into a single ADC channel for sequential calibration and fault detection. IC Role / Device Role / Timing Role: Dual 8:1 analog switch providing isolated, low-crosstalk signal selection with sub-250ns settling. Use Value: Enables 16:1 channel density without performance degradation-reducing BOM count and board area vs. discrete solutions. |
Use Scenario: Routing line-level stereo signals between multiple sources (DACs, phono preamps) and outputs (headphone amps, speakers). IC Role / Device Role / Timing Role: Low-distortion, low-noise analog mux with matched RON preserving channel balance and THD+N < -90dB. Use Value: Eliminates relay wear and contact oxidation while maintaining audiophile-grade signal integrity across all selected paths. |
| Industrial Process Control | Low-Voltage Data Acquisition |
Use Scenario: Scanning thermocouple, RTD, and 4–20mA loop inputs in PLC I/O modules operating from 24V rails. IC Role / Device Role / Timing Role: High-voltage-tolerant analog switch supporting ±8V dual supplies and 17V absolute max V+–V− differential. Use Value: Simplifies isolation design by allowing direct interface to field sensors without level-shifting amplifiers. |
Use Scenario: Battery-powered environmental monitor acquiring voltage from pH, humidity, and gas sensors at 3.3V or lower. IC Role / Device Role / Timing Role: Ultra-low leakage (<1nA) and low power (<10µW) analog mux enabling multi-year operation on coin cells. Use Value: Extends runtime by minimizing standby current while preserving measurement resolution in high-Z sensor nodes. |
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-channel function, but higher RON (120Ω typ), higher charge injection (15pC), and no guaranteed RON matching spec | Lower-cost option where precision matching and low glitch energy are non-critical | Choose MAX307CWI+ only if budget constraints outweigh need for ≤6Ω RON matching and ≤5pC charge injection. |
| ADG1408BRUZ | 8-channel single-ended (not dual), 4.7Ω RON, but requires ≥±4.5V dual or ≥9V single supply; not pin-compatible | Better RON and bandwidth, but demands higher supply voltage and different layout | Consider ADG1408BRUZ only when ultra-low on-resistance is mandatory and board redesign is acceptable. |
Compared with MAX307CWI+, the MAX397EWI+ delivers tighter RON matching and lower charge injection for precision measurement; versus ADG1408BRUZ, it offers dual-bank flexibility and wider supply range at the cost of higher RON.
Availability
MAX397EWI+ is available at Aetrix Electronics and suitable for automatic test equipment, industrial process control, audio routing, and low-voltage data acquisition requiring stable component supply across extended temperature ranges (–40°C to +85°C).
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 high-performance analog and mixed-signal ICs for precision, power, and interface applications in industrial, medical, and communications markets.
The MAX396/MAX397 product line targets high-fidelity analog signal routing where low distortion, low leakage, and channel-to-channel matching are essential-especially in data acquisition, test instrumentation, and sensor interface systems.
FAQ
What is the operating temperature range of the MAX397EWI+?
The MAX397EWI+ is rated for –40°C to +85°C ambient operation (E-grade), validated across full electrical specifications including leakage, RON, and switching speed. This makes it suitable for industrial control cabinets, outdoor test gear, and automotive under-hood auxiliary systems where thermal stability is critical. The "EWI" suffix explicitly denotes this extended temperature grade.
Does the MAX397EWI+ support single-supply operation?
Yes, the MAX397EWI+ supports single-supply operation from +2.7V to +16V. In this configuration, V– must be connected to GND. Performance remains fully specified down to +2.7V, though on-resistance increases and switching speed slows below +3V-ensuring functional operation during brown-out conditions without latch-up.
Is the MAX397EWI+ pin-compatible with the MAX307?
Yes, the MAX397EWI+ is pin-compatible with the MAX307 (and also with DG407/DG507A). All share identical 28-pin Wide SO packaging, identical pin assignments for V+, V–, GND, EN, A0–A2, COM, and NO1–NO8. This allows direct substitution without layout changes-though MAX397EWI+ adds dual-bank functionality (COMA/COMB) not present in MAX307.
What is the maximum analog signal voltage range supported by the MAX397EWI+?
The MAX397EWI+ supports analog signals from V– to V+ across all channels. With ±5V supplies, that is –5V to +5V; with +5V/V– = GND, it is 0V to +5V. Absolute maximum ratings allow V+ up to +17V and V– down to –17V, but the usable analog range remains bounded by the applied supply rails-not exceeding V+–V– ≤ 17V.
How does charge injection affect system performance with the MAX397EWI+?
Charge injection in the MAX397EWI+ is guaranteed ≤5pC, which-when switching into a 100pF hold capacitor-produces ≤50mV glitch (ΔV = Q/C). This is critical in sample-and-hold and switched-capacitor circuits; designers mitigate residual error using correlated double sampling or buffer isolation. The low, tightly specified value enables 12-bit+ accuracy in multiplexed ADC front-ends.
MAX397EWI+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- 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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