My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX397CWI
- Part No.:
- MAX397CWI
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX397CWI.pdf
- Description:
- IC MUX DUAL 8:1 100OHM 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,269
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX397CWI from Maxim Integrated is a dual 8-channel CMOS analog multiplexer designed for precision signal routing in low-voltage systems. It features 100Ω max on-resistance, ≤6Ω channel-to-channel RON matching, <1nA input off-leakage at +85°C, and operates from single +2.7V to +16V or dual ±2.7V to ±8V supplies. It is widely used in battery-operated data acquisition and audio signal routing where low charge injection (5pC max) and flat on-resistance over signal range are critical.
For engineers reviewing the MAX397CWI datasheet, MAX397CWI pinout, MAX397CWI application, or MAX397CWI equivalent, key selection criteria include guaranteed RON flatness (≤10Ω), break-before-make timing (≤70ns), TTL/CMOS-compatible logic inputs, and compatibility with industry-standard pinouts including MAX307, DG407, and DG507A.
Technical Context
The MAX397CWI implements a dual independent 8:1 analog multiplexer architecture with separate COMA/COMB outputs and shared address/enable control. Each 8-channel section uses a binary-decoded 3-bit address (A0–A2) and active-high EN to select one of eight bidirectional analog paths.
It employs Maxim's low-voltage silicon-gate CMOS process to achieve low charge injection (≤5pC), high off-isolation (−75dB at 100kHz), and ESD robustness (>2000V per Method 3015.7). Signal handling supports rail-to-rail analog voltages from V− to V+, with leakage and RON fully specified across −40°C to +85°C for industrial-grade variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channel Configuration | Dual 8:1 analog multiplexer - two independent switch banks, each selecting one of eight inputs to its dedicated output (COMA/COMB). |
| On-Resistance (RON) | 100Ω max at +25°C (±5V supplies); ensures minimal signal attenuation and gain error in precision measurement paths. |
| RON Matching | ≤6Ω max between channels - enables accurate ratiometric measurements and matched gain in differential or multi-channel sampling. |
| Charge Injection | ≤5pC max - limits voltage glitch on sampled-hold capacitors, critical for 12+ bit ADC front-ends. |
| Off-Leakage Current | <1nA input off-leakage at +85°C - preserves accuracy in high-impedance sensor interfaces and long-integration-time applications. |
| Supply Range | +2.7V to +16V single supply or ±2.7V to ±8V dual supply - supports operation from Li-ion battery (3.0V) up to industrial 15V rails. |
| Switching Speed | 250ns max transition time - suitable for multiplexed data acquisition up to ~1MHz effective sample rate per channel. |
Pinout & Package
MAX397CWI is housed in a 28-pin Wide SO (Small Outline) package with 300 mil body width, RoHS-compliant lead finish, and standard JEDEC MS-013AC footprint. Thermal resistance θJA is 12.50°C/W, supporting 1000mW continuous power dissipation at +70°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 28 | V+, V− | Positive/negative analog supply pins - support bipolar or single-supply operation; must be decoupled locally for noise-sensitive analog routing. |
| 12 | GND | Logic ground reference - separate from analog return; requires low-impedance connection to minimize digital switching noise coupling. |
| 15–17, 18 | A2, A1, A0, EN | 3-bit binary address inputs and active-high enable - control channel selection; CMOS/TTL compatible (0.8V/2.4V thresholds). |
| 4–11, 19–26 | NO1A–NO8A, NO1B–NO8B | Analog input terminals for each 8-channel bank - bidirectional, rail-to-rail capable, with 11pF off-capacitance (NOx) and 40pF COM off-capacitance. |
| 2, 27 | COMA, COMB | Dedicated analog output pins per bank - electrically isolated; allow simultaneous routing of two independent analog signals without crosstalk. |
Key Features
| Feature | Design Value |
|---|---|
| Precision RON flatness | ≤10Ω variation over full signal range (V− to V+) - maintains consistent gain and linearity across input voltage swing. |
| Ultra-low charge injection | ≤5pC - reduces settling error in sample-and-hold and switched-capacitor circuits, enabling ≥14-bit effective resolution. |
| Pin compatibility | Direct replacement for MAX307, DG407, DG507A - allows drop-in upgrade to lower leakage, flatter RON, and improved ESD tolerance. |
| Wide supply flexibility | Operates from +2.7V single supply or ±2.7V dual supply - supports portable, automotive, and industrial power architectures without level-shifting. |
| High off-isolation | −75dB at 100kHz - suppresses crosstalk between enabled and disabled channels in dense multiplexed sensor arrays. |
Applications
| Automatic Test Equipment | Audio Signal Routing |
|---|---|
|
Use Scenario: Multiplexing dozens of DUT test points to a shared precision ADC or source-measure unit. IC Role / Device Role / Timing Role: Dual-bank analog switch providing independent path selection for stimulus and measurement channels. Use Value: Matched RON and low leakage ensure measurement repeatability across channels; break-before-make prevents short-circuits during reconfiguration. |
Use Scenario: Routing microphone, line-in, or DAC outputs to multiple amplifiers or codec inputs in professional audio mixers. IC Role / Device Role / Timing Role: Low-distortion analog signal router with rail-to-rail capability and <1nA leakage at elevated temperature. Use Value: 5pC charge injection minimizes pop/click artifacts during real-time channel switching; wide supply range supports 3.3V and ±5V audio subsystems. |
| Low-Voltage Data Acquisition | Battery-Operated Equipment |
|
Use Scenario: Scanning thermocouples, RTDs, or bridge sensors in handheld meters or IoT edge nodes. IC Role / Device Role / Timing Role: Precision multiplexer interfacing high-Z sensors to low-power SAR ADCs with minimal offset drift. Use Value: ≤1nA off-leakage at +85°C prevents significant voltage error across >1MΩ sensor impedances; 100Ω RON adds negligible series error. |
Use Scenario: Power management and signal conditioning in portable medical devices, wearables, or wireless sensors. IC Role / Device Role / Timing Role: Low-quiescent-current analog switch enabling ultra-low standby power (<10μW) while retaining fast wake-up response. Use Value: Single +2.7V operation extends battery life; ESD rating >2000V eliminates need for external protection in compact enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX307CWI | Higher RON (120Ω typ), no guaranteed RON matching or flatness spec; 10pC charge injection. | Lower precision; acceptable for non-ratiometric, non-high-Z applications where cost is prioritized over matching. | Select MAX397CWI when channel matching, leakage, or charge injection directly impact measurement integrity. |
| DG407DY | 110Ω RON, 15pC charge injection, −60dB off-isolation; rated only to +85°C with no extended temp grade. | Limited performance in high-resolution or high-temperature environments; lacks ESD certification beyond 1000V. | Choose MAX397CWI for designs requiring guaranteed −75dB isolation, <5pC injection, or operation in harsh thermal conditions. |
Compared with MAX307CWI and DG407DY, the MAX397CWI delivers superior channel matching, lower leakage, and tighter charge injection control-making it the preferred choice for precision data acquisition, battery-constrained systems, and applications demanding rail-to-rail analog performance with minimal signal corruption.
Availability
MAX397CWI is available at Aetrix Electronics and suitable for automatic test equipment, audio signal routing, low-voltage data acquisition, and battery-operated equipment requiring stable component supply and long-term industrial availability.
Supply support for MAX397CWI 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) is a fabless semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.
The MAX396/MAX397 product line was engineered for precision, low-voltage analog signal routing in data acquisition, instrumentation, and automated test systems-emphasizing parameter stability over temperature, low distortion, and interoperability with legacy multiplexer footprints.
FAQ
What is the maximum operating supply voltage for MAX397CWI?
The MAX397CWI supports a single supply from +2.7V to +16V or dual supplies from ±2.7V to ±8V. Absolute maximum ratings specify V+ to V− ≤ 17V and individual supply pins within −0.3V to +17V (V+) or +0.3V to −17V (V−). Operation above +16V or below ±8V risks permanent damage and voids parametric guarantees.
Does MAX397CWI support rail-to-rail analog signal switching?
Yes, the MAX397CWI supports rail-to-rail analog signal ranges from V− to V+. When powered with ±5V supplies, it passes signals from −5V to +5V without clipping; with +5V/0V supplies, it handles 0V to +5V. This is confirmed in the Electrical Characteristics tables under "Analog Signal Range" for both dual and single-supply conditions.
Is MAX397CWI pin-compatible with MAX307 and DG407?
Yes, the MAX397CWI shares identical pinout, package dimensions, and logic interface behavior with MAX307CWI, DG407DY, and DG507ADY in the 28-pin Wide SO package. Address lines (A0–A2), enable (EN), COMA/COMB, and NOxA/NOxB terminals map directly-enabling drop-in replacement without PCB modification.
What is the typical charge injection value for MAX397CWI?
The MAX397CWI guarantees ≤5pC maximum charge injection (VCTE) at +25°C, with typical values of 1.5–2pC under standard test conditions (CL = 100pF, VNO = 0V). This low value minimizes voltage glitches on sampling capacitors, making the MAX397CWI suitable for 12–14-bit successive-approximation ADC front-ends.
How does temperature affect off-leakage current in MAX397CWI?
Input off-leakage current (INO(OFF)) remains <1nA at +85°C and is tested 100% at maximum rated hot operating temperature. The Typical Operating Characteristics graph (TOC5) shows off-leakage stays below 0.1nA up to +70°C and rises gradually to ~0.8nA at +85°C - well within the guaranteed 1nA limit for the C-grade (0°C to +70°C) and E-grade (−40°C to +85°C) versions.
MAX397CWI 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:
- Surface Mount
- Supplier Device Package:
- 28-SOIC
MAX397CWI FAQ
1.How can I place an order for MAX397CWI through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX397CWI 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 MAX397CWI reliable?
The price and inventory of MAX397CWI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX397CWI is usually 5 days.
3.What payment methods are accepted for MAX397CWI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX397CWI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX397CWI?
MAX397CWI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX397CWI 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 MAX397CWI?
For technical support, including MAX397CWI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX397CWI requirements.
6.How does Aetrix verify that MAX397CWI is sourced from the original manufacturer or authorized distributors?
All MAX397CWI 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 MAX397CWI meets industry standards.
7.What is the process for return or replacement of MAX397CWI?
All MAX397CWI units undergo pre-shipment inspection (PSI). If there is an issue with MAX397CWI, 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 MAX397CWI part is unused and in its original packaging.
Return procedure for MAX397CWI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX397CWI Tags
-
SN74LVC1G3157DBVR
Texas Instruments
-
SN74LVC1G66DBVR
Texas Instruments
-
SN74LVC1G66DCKR
Texas Instruments
-
SN74LVC1G3157DSFR
Texas Instruments
-
1P1G3157QDCKRQ1
Texas Instruments
-
SN74LVC2G66DCUR
Texas Instruments
-
SN74LV4052APWR
Texas Instruments
-
74HC4051D,653
Nexperia USA Inc.
-
SN74LV4051APWR
Texas Instruments
-
CD74HC4052PWR
Texas Instruments
-
CD74HC4051PWR
Texas Instruments
-
TS5A3166DBVR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
