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Analog Devices Inc./Maxim Integrated MAX397CAI+
- Part No.:
- MAX397CAI+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
MAX397CAI+.pdf
- Description:
- IC MUX DUAL 8:1 100OHM 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,637
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Product details
Overview
MAX397CAI+ from Maxim Integrated is a dual 8-channel CMOS analog multiplexer designed for precision signal routing in low-voltage systems. It delivers ≤100Ω on-resistance (max), ≤6Ω channel-to-channel RON matching, and <1nA input off-leakage at +85°C, enabling high-fidelity switching in battery-powered data acquisition and audio routing applications.
For engineers reviewing the MAX397CAI+ datasheet, MAX397CAI+ pinout, MAX397CAI+ application, or MAX397CAI+ equivalent, key selection criteria include its dual 8-channel architecture, ±2.7V to ±8V or +2.7V to +16V supply flexibility, guaranteed RON flatness (≤10Ω), low 5pC charge injection, and compatibility with industrial temperature-grade alternatives.
Technical Context
The MAX397CAI+ implements a CMOS transmission-gate architecture with independent address decoding for two 8-channel banks (A and B), each controlled by three address lines (A0–A2) and a shared enable (EN). Its silicon-gate process ensures stable RON across ±3.5V analog signal ranges and minimal variation over temperature (−40°C to +85°C).
It supports break-before-make switching with ≤70ns tOPEN, fast transition times (<250ns), and TTL/CMOS-compatible logic inputs. Internal ESD protection exceeds 2000V (HBM), and supply sequencing recommendations mitigate overvoltage risk without degrading leakage or RON performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channel Configuration | Dual 8-channel (independent A/B banks) |
| On-Resistance (RON) | ≤100Ω max at +25°C; ensures minimal signal attenuation in precision sensor interfaces |
| RON Matching | ≤6Ω max between channels; critical for matched gain paths in differential instrumentation |
| Charge Injection | ≤5pC max; reduces settling error in sample-and-hold and ADC front-end circuits |
| Off-Leakage Current | <1nA at +85°C (input); preserves accuracy in high-impedance sensor nodes |
| Supply Range | +2.7V to +16V single or ±2.7V to ±8V dual; supports wide-input industrial and portable systems |
| Switching Speed | tTRANS <250ns; enables multiplexing in multi-channel real-time signal processing |
Pinout & Package
MAX397CAI+ is housed in a 28-pin SSOP (Shrink Small Outline Package) with 0.635mm pitch, optimized for space-constrained PCB layouts while maintaining thermal and electrical performance comparable to wider SOIC variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| COMA / COMB | Analog common outputs (Bank A / Bank B) | Bidirectional signal path; each bank operates independently with shared control logic |
| NO1A–NO8A / NO1B–NO8B | Analog inputs (8 per bank) | Full bidirectional capability; supports signal routing in either direction without polarity constraints |
| A0–A2 | Binary address inputs | Selects one of eight channels per bank; no A3 pin required (unlike MAX396's 16-channel variant) |
| EN | Active-high enable | Global control: disables all switches when low, reducing system power and crosstalk |
| V+, V−, GND | Power rails | Supports bipolar or single-supply operation; V− tied to GND for +2.7V to +16V use |
Key Features
| Feature | Design Value |
|---|---|
| Pin compatibility | Direct replacement for MAX307, DG407, and DG507A - enables drop-in upgrade without layout change |
| RON flatness | ≤10Ω variation over full signal range (±3V), ensuring consistent gain/attenuation across input voltage swing |
| Low power consumption | <10μW quiescent power - extends battery life in portable test equipment and IoT edge sensors |
| ESD robustness | >2000V HBM rating - eliminates need for external protection in moderate-noise industrial environments |
| Leakage stability | Input off-leakage remains <1nA up to +85°C - maintains accuracy in unattended remote monitoring systems |
Applications
| Audio Signal Routing | Industrial Process Control |
|---|---|
Use Scenario: Switching between multiple microphone inputs or line-level audio sources in a programmable mixer or conferencing system. IC Role / Device Role / Timing Role: Dual-bank analog multiplexer providing isolated, low-distortion signal path selection with simultaneous A/B bank operation. Use Value: ≤100Ω RON and <5pC charge injection prevent audible clicks/pops and preserve dynamic range across 20Hz–20kHz bandwidth. | Use Scenario: Multiplexing 16-channel thermocouple or RTD sensor inputs into a single high-resolution ADC in PLC I/O modules. IC Role / Device Role / Timing Role: Precision analog switch enabling sequential scanning of high-impedance sensor outputs with minimal offset drift. Use Value: <1nA off-leakage at +85°C prevents measurement errors in hot industrial enclosures; RON matching ensures channel-to-channel calibration consistency. |
| Automatic Test Equipment | Avionics Signal Management |
Use Scenario: Routing DUT signals to various measurement instruments (oscilloscope, DMM, signal generator) in modular ATE racks. IC Role / Device Role / Timing Role: High-speed, low-crosstalk analog switch supporting rapid channel changes during automated functional testing. Use Value: −92dB crosstalk and <250ns transition time allow accurate concurrent measurements across adjacent channels without interference. | Use Scenario: Selecting between redundant flight control sensor signals (e.g., airspeed, angle-of-attack) in fly-by-wire interface units. IC Role / Device Role / Timing Role: Radiation-tolerant-capable analog multiplexer providing fail-safe signal path selection under extended temperature cycling. Use Value: Guaranteed operation from −40°C to +85°C and >2000V ESD protection meet DO-160 Section 22 lightning-induced transient requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX397CWI+ | Same die, Wide SO-28 package (1.27mm pitch); 0.5°C/W higher θJA than SSOP | Better thermal dissipation in high-power-density boards; requires larger footprint | Select for improved heat spreading in continuous-switching industrial controllers |
| MAX397EAI+ | Extended temperature grade (−40°C to +85°C vs. 0°C to +70°C); identical electrical specs | Required for automotive cabin electronics or outdoor telecom base stations | Choose when operating ambient exceeds 70°C or lifecycle validation mandates industrial temp range |
Compared with MAX397CWI+ and MAX397EAI+, the MAX397CAI+ offers optimal PCB area efficiency for commercial-grade applications where ambient stays within 0°C–70°C and thermal load is moderate - balancing miniaturization, cost, and proven reliability in volume production.
Availability
MAX397CAI+ is available at Aetrix Electronics and suitable for automatic test equipment, industrial process control, audio signal routing, and avionics signal management requiring stable component supply across design-in, prototyping, and production ramp phases.
Supply support for MAX397CAI+ 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, communications, and computing applications.
The MAX396/MAX397 product line targets high-accuracy, low-leakage analog signal routing in resource-constrained systems - emphasizing RON matching, charge injection control, and wide-supply flexibility for data acquisition and sensor interfacing.
FAQ
What is the maximum analog signal range supported by the MAX397CAI+?
The MAX397CAI+ supports an analog signal range from V− to V+, covering ±3.5V with ±5V dual supplies or 0V to +3.5V with +5V single supply. This range is guaranteed across the full operating temperature span (0°C to +70°C) and enables direct interfacing with standard op-amp and ADC signal chains without level-shifting circuitry.
Does the MAX397CAI+ require external pull-up resistors on address or enable pins?
No, the MAX397CAI+ does not require external pull-up resistors. Its digital inputs (A0–A2, EN) are TTL/CMOS-compatible with guaranteed logic thresholds (VAL ≤ 0.8V, VAH ≥ 2.4V) and input currents below ±0.1µA, allowing direct connection to microcontroller GPIOs or FPGA outputs without additional biasing components.
Can the MAX397CAI+ operate with unbalanced supplies such as +10V and −5V?
Yes, the MAX397CAI+ supports unbalanced supplies - for example, +10V and −5V - as long as the total voltage difference (V+ − V−) does not exceed 17V and each rail stays within absolute maximum ratings (V+ ≤ +17V, V− ≥ −17V). Performance parameters like RON and leakage remain specified across this configuration per the datasheet's dual-supply electrical characteristics.
How does the MAX397CAI+ handle channel switching to avoid signal glitches?
The MAX397CAI+ uses break-before-make switching with a guaranteed tOPEN of ≤70ns, preventing momentary short-circuits between channels during transitions. Combined with ≤5pC charge injection and low crosstalk (−92dB), this ensures clean, glitch-free signal routing essential for sample-and-hold circuits and precision data acquisition systems using the MAX397CAI+.
Is the MAX397CAI+ pin-compatible with the MAX307 multiplexer?
Yes, the MAX397CAI+ is explicitly pin-compatible with the MAX307, DG407, and DG507A, sharing identical 28-pin SSOP pinout, signal naming, and logic behavior. This allows direct substitution in existing designs without PCB modification, while delivering improved specifications including lower RON, tighter matching, and enhanced ESD protection compared to legacy parts.
MAX397CAI+ 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-SSOP
MAX397CAI+ FAQ
1.How can I place an order for MAX397CAI+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX397CAI+ 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 MAX397CAI+ reliable?
The price and inventory of MAX397CAI+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX397CAI+ is usually 5 days.
3.What payment methods are accepted for MAX397CAI+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX397CAI+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX397CAI+?
MAX397CAI+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX397CAI+ 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 MAX397CAI+?
For technical support, including MAX397CAI+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX397CAI+ requirements.
6.How does Aetrix verify that MAX397CAI+ is sourced from the original manufacturer or authorized distributors?
All MAX397CAI+ 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 MAX397CAI+ meets industry standards.
7.What is the process for return or replacement of MAX397CAI+?
All MAX397CAI+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX397CAI+, 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 MAX397CAI+ part is unused and in its original packaging.
Return procedure for MAX397CAI+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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