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Analog Devices Inc./Maxim Integrated MAX397EWI+T
- Part No.:
- MAX397EWI+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX397EWI+T.pdf
- Description:
- IC MUX DUAL 8:1 100OHM 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,807
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Product details
Overview
MAX397EWI+T from Maxim Integrated is a dual 8-channel, low-voltage CMOS analog multiplexer designed for precision signal routing in mixed-signal systems. It delivers ≤100Ω on-resistance (max), ≤6Ω channel-to-channel RON matching, and <1nA input off-leakage at +85°C, enabling high-accuracy data acquisition in battery-powered test equipment and industrial control interfaces.
For engineers reviewing the MAX397EWI+T datasheet, MAX397EWI+T pinout, MAX397EWI+T application, or MAX397EWI+T equivalent, this page provides verified specifications, package-validated pin functions, real-world use cases in audio routing and sample-and-hold circuits, and two confirmed alternative parts with documented functional trade-offs.
Technical Context
The MAX397EWI+T implements a dual independent 8:1 analog multiplexer architecture with TTL/CMOS-compatible digital address inputs (A0–A2) and an active-low enable (EN). Each 8-channel bank (A and B) shares its own common output (COMA/COMB), supporting bidirectional signal flow across ±2.7V to ±8V dual supplies or +2.7V to +16V single supply.
Its silicon-gate CMOS process ensures guaranteed charge injection ≤5pC, break-before-make timing ≤70ns (typ), and ESD protection >2000V per Method 3015.7 - critical for reliable switching in automated test equipment where signal integrity and channel crosstalk (<−92dB at 100kHz) must be preserved.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channel Configuration | Dual 8:1 analog multiplexer - two independent banks, each with dedicated COM output (COMA/COMB) and shared address/control lines |
| On-Resistance (RON) | ≤100Ω max at +25°C (±5V supplies); enables minimal voltage drop and gain error in precision sensor front-ends |
| RON Matching | ≤6Ω max between channels - ensures consistent gain scaling across multi-channel ADC inputs |
| Charge Injection | ≤5pC max - limits voltage glitch on sample capacitors in hold-phase-critical applications |
| Off-Leakage Current | <1nA input off-leakage at +85°C - preserves accuracy in high-impedance transducer interfaces |
| Supply Range | +2.7V to +16V single supply or ±2.7V to ±8V dual supply - supports operation from Li-ion batteries to industrial rails |
| Switching Speed | Transition time <250ns (max) - suitable for multiplexing up to ~1MHz analog signals without distortion |
Pinout & Package
MAX397EWI+T is housed in a 28-pin Wide SO (SOIC-W) package, 7.6mm × 17.9mm body, 1.27mm pitch, with exposed pad not electrically connected. Pin 12 is GND; pins 1 and 27 are V+ and V−; pins 15–17 are A2/A1/A0; pin 18 is EN; pins 4–11 and 19–26 serve as NO1A–NO8A and NO1B–NO8B inputs; pins 28 and 2 are COMA and COMB outputs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive supply rail | Accepts +2.7V to +16V; substrate tied internally to V+ for latch-up immunity |
| V− | Negative supply rail | Accepts −2.7V to −8V; required for bipolar signal handling; not used in single-supply mode |
| GND (Pin 12) | Logic reference ground | Reference for all digital inputs (A0–A2, EN); must be stable to avoid address decoding errors |
| COMA / COMB | Analog common outputs (Bank A/B) | Bidirectional ports - connect to ADC input, op-amp summing node, or DAC output |
| NO1A–NO8A / NO1B–NO8B | Analog signal inputs (Bank A/B) | Interchangeable I/O; support rail-to-rail analog swing within V− to V+ range |
| A0–A2 | Binary address inputs | Select one of eight channels per bank; CMOS/TTL compatible (0.8V/2.4V thresholds) |
| EN | Active-low enable | High-Z state when EN = high; prevents channel contention during power-up or reset |
Key Features
| Feature | Design Value |
|---|---|
| Pin compatibility | Fully pin-compatible with MAX307, DG407, and DG507A - allows drop-in replacement without PCB revision |
| RON flatness | ≤10Ω max variation over full signal range (V− to V+) - maintains linearity in wide-dynamic-range instrumentation |
| Low power consumption | <10μW quiescent - extends battery life in portable multimeters and handheld analyzers |
| Off-isolation | −75dB min at 100kHz - suppresses interference between inactive and active channels in dense routing |
| Crosstalk | −92dB min at 100kHz - preserves signal fidelity when routing adjacent audio or sensor channels |
Applications
| Automatic Test Equipment | Audio Signal Routing |
|---|---|
Use Scenario: Multiplexing 16 sensor outputs into a single high-resolution ADC in a modular PXI chassis. IC Role / Device Role / Timing Role: Dual 8:1 analog switch providing channel selection under FPGA control with sub-250ns settling. Use Value: Eliminates need for discrete relays or multiple ADCs; RON matching ≤6Ω ensures <0.1% gain error across all 16 paths. |
Use Scenario: Routing microphone preamp outputs to different DSP processing chains in a professional audio mixer. IC Role / Device Role / Timing Role: Bidirectional analog switch enabling flexible patching with no DC bias shift due to low charge injection (≤5pC). Use Value: Prevents audible pop/click during live switching; −92dB crosstalk avoids bleed between vocal and instrument buses. |
| Industrial Process Control | Low-Voltage Data Acquisition |
Use Scenario: Scanning thermocouple and RTD inputs in a PLC analog input module operating from 3.3V logic rails. IC Role / Device Role / Timing Role: Precision multiplexer interfacing millivolt-level sensors to a sigma-delta ADC with programmable gain. Use Value: Input off-leakage <1nA at +85°C prevents offset drift in high-impedance sensor bridges; single +3.3V operation simplifies power design. |
Use Scenario: Battery-powered environmental monitor sampling temperature, humidity, and gas sensors via shared ADC. IC Role / Device Role / Timing Role: Low-quiescent-current analog switch enabling >1-year operation on coin cell; EN pin supports sleep-mode isolation. Use Value: <10μW standby power minimizes system leakage; rail-to-rail analog range accommodates diverse sensor output spans. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX307CWI+T | Same pinout, identical 8:1 dual configuration, but higher RON (120Ω max) and wider RON matching (15Ω max) | Suitable for less demanding DC-coupled applications where cost is prioritized over precision | Prefer MAX397EWI+T when RON matching ≤6Ω or charge injection ≤5pC is required |
| ADG1408YRUZ | 8:1 single-channel (not dual), 4.5Ω RON, but requires separate enable per channel and lacks COMB output | Used where independent channel control is needed, not bank-wide selection | Choose MAX397EWI+T for dual-bank synchronous routing; ADG1408YRUZ only replaces one bank |
Compared with MAX307CWI+T and ADG1408YRUZ, the MAX397EWI+T uniquely delivers dual 8:1 routing with precision-matched on-resistance and ultra-low leakage in a single SOIC-W package - making it optimal for space-constrained, multi-sensor DAQ systems requiring channel consistency.
Availability
MAX397EWI+T is available at Aetrix Electronics and suitable for automatic test equipment, industrial process control, and low-voltage data acquisition systems requiring stable component supply across extended temperature ranges (−40°C to +85°C).
Supply support for MAX397EWI+T 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, medical, and communications applications.
The MAX396/MAX397 product line targets high-fidelity analog signal routing in environments where low leakage, matched on-resistance, and robust ESD tolerance are essential - especially in automated test and portable instrumentation.
FAQ
What is the maximum analog signal range supported by the MAX397EWI+T?
The MAX397EWI+T supports analog signals from V− to V+, with absolute maximum ratings of (V− − 2V) to (V+ + 2V) on any terminal. Under ±5V dual supplies, the usable range is −5V to +5V; with +5V single supply (V− = GND), it is 0V to +5V. This rail-to-rail capability allows direct interfacing with most sensors and ADCs without level-shifting circuitry.
Does the MAX397EWI+T require external pull-up resistors on its address lines (A0–A2)?
No, the MAX397EWI+T does not require external pull-ups on A0–A2 or EN. Its digital inputs are TTL/CMOS compatible with guaranteed logic thresholds (VAL ≤ 0.8V, VAH ≥ 2.4V) and input currents <±0.1µA at +25°C. Direct connection to FPGA or microcontroller GPIOs is fully supported without additional components.
Can the MAX397EWI+T operate from a single 3.3V supply?
Yes, the MAX397EWI+T operates from +2.7V to +16V single supply. At +3.3V, RON increases to ~315Ω (typ), transition time extends to ~230ns (typ), and leakage remains within spec. Performance is fully guaranteed at 3.3V, making it suitable for modern low-voltage embedded systems without sacrificing reliability.
How is channel selection implemented in the dual-bank architecture of the MAX397EWI+T?
The MAX397EWI+T uses shared address lines A0–A2 and EN to control both banks simultaneously: asserting EN low enables both COMA and COMB outputs, and the same A2:A0 code selects identical channels (e.g., NO1A and NO1B) across banks. This synchronized selection simplifies firmware for parallel signal acquisition or differential routing.
What thermal performance can be expected from the MAX397EWI+T in a 28-pin Wide SO package?
In the 28-pin Wide SO package, the MAX397EWI+T has a thermal resistance θJA of 12.50°C/W, derating 12.50mW/°C above +70°C. At 1000mW max continuous dissipation (TA = +70°C), junction temperature rise is limited to ~12.5°C under typical low-duty-cycle switching - well within the −40°C to +85°C operating range.
MAX397EWI+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- 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+T FAQ
1.How can I place an order for MAX397EWI+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX397EWI+T 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+T reliable?
The price and inventory of MAX397EWI+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX397EWI+T is usually 5 days.
3.What payment methods are accepted for MAX397EWI+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX397EWI+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX397EWI+T?
MAX397EWI+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX397EWI+T 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+T?
For technical support, including MAX397EWI+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX397EWI+T requirements.
6.How does Aetrix verify that MAX397EWI+T is sourced from the original manufacturer or authorized distributors?
All MAX397EWI+T 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+T meets industry standards.
7.What is the process for return or replacement of MAX397EWI+T?
All MAX397EWI+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX397EWI+T, 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+T part is unused and in its original packaging.
Return procedure for MAX397EWI+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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