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Analog Devices Inc./Maxim Integrated MAX397CPI
- Part No.:
- MAX397CPI
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 28-DIP (0.600", 15.24mm)
- Datasheet:
-
MAX397CPI.pdf
- Description:
- IC MUX DUAL 8:1 100OHM 28DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,205
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Product details
Overview
MAX397CPI 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, 6Ω max RON matching between channels, and guaranteed <1nA input off-leakage at +85°C. It operates from single +2.7V to +16V or dual ±2.7V to ±8V supplies and is used in battery-operated data acquisition and audio routing where channel-to-channel consistency and low charge injection (5pC max) are critical.
For engineers reviewing the MAX397CPI datasheet, MAX397CPI pinout, MAX397CPI application, or MAX397CPI equivalent, this page delivers verified electrical specifications, validated dual-8-channel switching behavior, package-specific thermal derating, truth-table–confirmed address decoding, and direct alternatives with documented functional alignment and supply-range compatibility.
Technical Context
The MAX397CPI implements two independent 8:1 analog multiplexers (A and B sides), each controlled by three address lines (A0–A2) and a shared enable (EN). Its silicon-gate CMOS process ensures flat on-resistance over ±3.5V signal range (10Ω max flatness) and ultra-low charge injection (5pC max), minimizing settling error in sample-and-hold and ADC front-end applications.
It supports break-before-make switching (70ns max tOPEN), TTL/CMOS-compatible logic inputs (VAL ≤ 0.8V, VAH ≥ 2.4V), and operates across 0°C to +70°C. Pin compatibility with MAX307, DG407, and DG507A enables drop-in replacement in legacy industrial and test equipment designs without layout changes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channel Configuration | Dual 8:1 analog multiplexer - two independent signal paths, each selecting one of eight inputs to its COM output |
| On-Resistance (RON) | 100Ω max at +25°C (±5V supplies); ensures minimal signal attenuation and gain error in precision sensor interfaces |
| RON Matching | 6Ω max between channels - guarantees matched gain/attenuation across multiplexed sensor or audio channels |
| Charge Injection | 5pC max - limits voltage glitch on sampled hold capacitors, enabling sub-12-bit accuracy in data acquisition |
| Off-Leakage Current | <1nA at +85°C (input), <2.5nA (output) - preserves high-impedance node integrity in low-power battery systems |
| Supply Range | +2.7V to +16V single or ±2.7V to ±8V dual - supports wide-input industrial sensors and portable +3.3V/+5V systems |
| Transition Time | 250ns max - enables multiplexing at up to ~1MHz effective channel-switching rate in real-time control loops |
Pinout & Package
MAX397CPI is housed in a 28-pin plastic DIP package (0.600" width), rated for 0°C to +70°C operation. Thermal derating is 14.29mW/°C above +70°C, with 1143mW max continuous power dissipation at +70°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 28 | V+, V− | Positive/negative supply rails - support bipolar or single-ended operation; absolute max V+–V− = 17V |
| 12 | GND | Logic ground reference - must be tied to system ground; not signal return for analog paths |
| 15–17, 18 | A2, A1, A0, EN | Binary address inputs and global enable - EN = low disables both muxes; address decoding follows standard 3-bit binary map |
| 19–26 | NO1A–NO8A | Analog inputs for Channel A side - bidirectional, compatible with ±3.5V signal range under ±5V supplies |
| 2–3, 13–14 | COMA, COMB, NO1B–NO8B | Channel A/B common outputs and Channel B inputs - COMA/COMB are independent bidirectional ports; NO1B–NO8B serve B-side inputs only |
| 4–11 | N.C. | No internal connection - pins 4–11 are unconnected; must remain floating or grounded per layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| Pin compatibility | Fully pin-compatible with industry-standard MAX307, DG407, and DG507A - enables drop-in replacement without PCB revision |
| Low charge injection | 5pC max - reduces sampling transient error, supporting 12-bit+ resolution in switched-capacitor ADC front-ends |
| Flat on-resistance | 10Ω max variation over full ±3V analog range - maintains consistent gain across input signal swing in instrumentation amplifiers |
| ESD protection | >2000V per Method 3015.7 - enhances robustness in handling-sensitive manufacturing and field-repair environments |
| Leakage performance | <1nA input off-leakage at +85°C - preserves accuracy in high-impedance pH, thermocouple, or piezoelectric sensor interfaces |
Applications
| Automatic Test Equipment | Audio Signal Routing |
|---|---|
Use Scenario: Multiplexing dozens of DUT test points to a shared precision measurement unit in rack-mounted ATE systems. IC Role / Device Role / Timing Role: Dual 8:1 analog switch providing isolated, low-crosstalk signal path selection under microcontroller address control. Use Value: 92dB crosstalk rejection and 75dB off-isolation prevent measurement contamination between adjacent test channels. |
Use Scenario: Routing multiple microphone or line-level audio sources to a single codec or amplifier in studio mixers or conferencing systems. IC Role / Device Role / Timing Role: Low-distortion analog switch enabling silent, glitch-free source selection via GPIO-controlled address lines. Use Value: 5pC max charge injection and <250ns transition time eliminate audible clicks/pops during real-time switching. |
| Low-Voltage Data Acquisition | Battery-Operated Equipment |
Use Scenario: Scanning 16 thermistor or RTD sensor inputs into a single sigma-delta ADC in portable environmental monitors. IC Role / Device Role / Timing Role: Precision multiplexer with matched RON ensuring identical gain across all channels for calibrated ratiometric measurements. Use Value: 6Ω max RON matching eliminates inter-channel gain error, reducing calibration overhead in firmware. |
Use Scenario: Managing analog sensor inputs and DAC outputs in handheld medical devices powered by single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Ultra-low leakage (1nA @ +85°C) analog switch preserving battery life while maintaining signal fidelity during sleep/wake cycles. Use Value: Sub-10μW quiescent power and rail-to-rail signal capability extend runtime without sacrificing measurement resolution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX307CPI | Single 8:1 mux (vs. dual 8:1); identical RON, leakage, and supply specs; same 28-pin DIP footprint | Requires two MAX307CPIs to match MAX397CPI's dual-path functionality; increases board area and component count | Select when only one 8-channel path is needed or when redesign allows doubling IC count for redundancy |
| DG407DN | Same dual 8:1 topology and pinout; slightly higher RON (120Ω max) and lower ESD rating (1500V) | Acceptable in cost-sensitive industrial controls where 20Ω higher on-resistance doesn't impact loop gain error budget | Choose for legacy compatibility in existing DG-series designs where minor RON increase is tolerable |
Compared with MAX307CPI and DG407DN, the MAX397CPI uniquely delivers dual independent 8:1 switching in a single 28-pin DIP with best-in-class 5pC charge injection and >2000V ESD - making it optimal for space-constrained, high-fidelity data acquisition where channel density and signal integrity are co-prioritized.
Availability
MAX397CPI is available at Aetrix Electronics and suitable for automatic test equipment, audio routing systems, low-voltage data acquisition, and battery-operated equipment requiring stable component supply across extended temperature and voltage ranges.
Supply support for MAX397CPI 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-accuracy analog signal routing in environments requiring low leakage, flat on-resistance, and robust supply flexibility - especially in portable and multi-sensor measurement systems.
FAQ
What is the operating temperature range for the MAX397CPI?
The MAX397CPI is specified for 0°C to +70°C ambient operation. This commercial-grade temperature range aligns with its "C" suffix designation and is validated across all key parameters including on-resistance, leakage, and switching speed. The device uses the same die as wider-temperature variants (e.g., MAX397EPI), but only the 0°C to +70°C range is production-tested and guaranteed for the MAX397CPI.
Does the MAX397CPI support single-supply operation?
Yes, the MAX397CPI supports single-supply operation from +2.7V to +16V. When using a single supply, V− must be connected to GND. Performance remains fully specified down to +2.7V; operation below this voltage is not guaranteed, though functional switching may occur. The device retains CMOS-logic compatibility and low leakage even at minimum supply.
How many analog channels does the MAX397CPI provide?
The MAX397CPI provides two independent 8-channel analog multiplexers - labeled A and B - for a total of 16 analog inputs. Each side has its own common output (COMA and COMB) and shares address (A0–A2) and enable (EN) inputs. This dual architecture allows simultaneous or interleaved routing of two separate signal streams without crosstalk.
What is the maximum allowable supply voltage difference (V+ − V−) for the MAX397CPI?
The MAX397CPI specifies an absolute maximum V+ − V− of 17V. This limit applies regardless of individual rail values - for example, +10V and −5V (15V difference) is acceptable, but +12V and −6V (18V difference) exceeds rating and risks permanent damage. Exceeding 17V violates Absolute Maximum Ratings and voids parametric guarantees.
Is the MAX397CPI pin-compatible with the MAX307?
Yes, the MAX397CPI is pin-compatible with the MAX307 in the same 28-pin DIP package. Both share identical pin functions for V+, V−, GND, EN, A0–A2, COM, and NO1–NO8. However, the MAX397CPI integrates two independent 8:1 muxes (COMA/COMB), whereas the MAX307 provides only one - meaning MAX397CPI offers double the channel density in the same footprint.
MAX397CPI 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 28-PDIP
MAX397CPI FAQ
1.How can I place an order for MAX397CPI through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX397CPI 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 MAX397CPI reliable?
The price and inventory of MAX397CPI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX397CPI is usually 5 days.
3.What payment methods are accepted for MAX397CPI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX397CPI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX397CPI?
MAX397CPI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX397CPI 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 MAX397CPI?
For technical support, including MAX397CPI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX397CPI requirements.
6.How does Aetrix verify that MAX397CPI is sourced from the original manufacturer or authorized distributors?
All MAX397CPI 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 MAX397CPI meets industry standards.
7.What is the process for return or replacement of MAX397CPI?
All MAX397CPI units undergo pre-shipment inspection (PSI). If there is an issue with MAX397CPI, 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 MAX397CPI part is unused and in its original packaging.
Return procedure for MAX397CPI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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