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Analog Devices Inc./Maxim Integrated MAX329EWE+
- Part No.:
- MAX329EWE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX329EWE+.pdf
- Description:
- IC SWITCH SP4TX2 3.5KOHM 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,923
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Product details
Overview
The MAX329EWE+ from Maxim Integrated is a differential 2-of-8 monolithic CMOS analog multiplexer designed for high-precision signal routing in data-acquisition and fault-tolerant systems. It features ultra-low off-leakage (≤1pA at +25°C), 2.5kΩ typical on-resistance, ±5V to ±18V dual-supply operation, bidirectional signal handling, and pin compatibility with DG509 and MAX359 - enabling direct replacement in legacy industrial sensor front-ends.
For engineers reviewing the MAX329EWE+ datasheet, MAX329EWE+ pinout, MAX329EWE+ application, or MAX329EWE+ equivalent, this device is selected for low-error analog switching where leakage-induced offset (<40nV with 40kΩ input resistors), rail-to-rail analog swing, and 1.5µs switching speed are critical in high-impedance source environments like precision ADC interfaces and aircraft display signal conditioning.
Technical Context
The MAX329EWE+ implements a differential 2-channel selection architecture using CMOS transmission gates controlled by A0/A1 address inputs and an active-high EN enable. Its latchup-proof construction ensures robustness under transient overvoltage conditions, while its analog-signal range extends to the supply rails (±15V) without clipping.
It supports unbalanced supplies (e.g., +12V/–5V), delivers <1.5µs transition time with 0.2µs break-before-make interval, and maintains channel-to-channel RDS(ON) matching within 2% - essential for matched-pair signal routing in differential instrumentation and isolated sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Analog Signal Range | ±15V - supports rail-to-rail input/output swing with ±15V supplies, enabling full dynamic range utilization in bipolar signal chains. |
| Drain-Source On-Resistance | 2.5kΩ typ - ensures minimal gain error and settling impact when driving high-input-impedance op amps or ADCs. |
| Off-Leakage Current | ≤1pA at +25°C - limits voltage error to <40nV with 40kΩ external protection resistors, preserving 17-bit resolution over temperature. |
| Switching Time | 1.5µs max - enables sampling rates up to ~667kHz in time-multiplexed acquisition systems without inter-channel crosstalk buildup. |
| Supply Voltage Range | ±5V to ±18V - allows flexible system-level power architecture, including asymmetric rails like +12V/–5V for mixed-signal subsystems. |
| Off-Isolation | 84dB at 500kHz - suppresses crosstalk between inactive channels in multi-sensor monitoring applications. |
| Charge Injection | 4pC max - minimizes step-induced settling errors during channel switching in precision integrator or sample-hold circuits. |
Pinout & Package
MAX329EWE+ is supplied in a 16-pin Wide SO (SOIC-W) RoHS-compliant package with exposed pad (EP), rated for –40°C to +85°C operation. Pin 1 is V–, pin 16 is EN, and the exposed pad must be connected to V+ per Maxim's layout guidance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3 | V– | Negative supply rail connection - establishes lower analog voltage boundary and bias reference for internal CMOS switches. |
| 2, 16 | A0, A1 | Binary address inputs - select one of four differential pairs (S1A/S1B through S4A/S4B) with logic-compatible thresholds (VAL ≤0.8V, VAH ≥2.4V). |
| 4–7, 10–13 | S1A–S4A, S1B–S4B | Differential analog inputs - bidirectional terminals accepting matched signal pairs; each pair routed simultaneously to outputs DA/DB when selected. |
| 6, 7 | DA, DB | Differential analog outputs - deliver selected differential signal pair to downstream circuitry with matched propagation delay and impedance. |
| 11, 12 | V+, GND | Positive supply and ground references - define upper analog rail and logic/switch bias reference; GND serves as digital and analog common. |
| 14 | EN | Active-high enable - disables all switches (high-impedance state) when low, reducing system power and preventing signal contention during idle periods. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low off-leakage | ≤1pA at +25°C - enables >100GΩ effective input impedance in fault-tolerant configurations with 40kΩ series resistors. |
| Bidirectional operation | Supports mux and demux modes - allows reuse in both sensor-to-ADC and DAC-to-actuator paths without redesign. |
| Rail-to-rail analog range | Operates with signals from V– to V+ - eliminates level-shifting requirements in ±15V industrial control I/O modules. |
| Pin compatibility | Direct replacement for DG509 and MAX359 - reduces qualification effort and enables drop-in upgrades in existing PCB layouts. |
| Latchup-proof process | Immune to destructive latchup under overvoltage faults - critical for avionics and test equipment exposed to ESD or wiring errors. |
Applications
| Industrial Data Acquisition | Aircraft Heads-Up Display (HUD) Signal Routing |
|---|---|
Use Scenario: Multiplexing outputs from 4 differential pressure/temperature sensors into a single 24-bit sigma-delta ADC in a PLC module. IC Role / Device Role / Timing Role: Differential 2-of-8 analog switch providing matched-path signal selection with sub-40nV leakage-induced offset. Use Value: Maintains 17-bit effective resolution across –40°C to +85°C using 39kΩ fault-protection resistors, eliminating recalibration cycles. |
Use Scenario: Routing synchronized video sync and grayscale signals from multiple HUD image generators to a shared projection driver. IC Role / Device Role / Timing Role: Low-crosstalk (84dB), fast-switching (1.5µs) differential mux ensuring timing-aligned signal delivery without skew or ghosting. Use Value: Break-before-make interval of 0.2µs prevents momentary shorting between video sources, avoiding display corruption during mode switching. |
| Fault-Tolerant Sensor Interface | High-Voltage Test Equipment Channel Selection |
Use Scenario: Protecting a precision instrumentation amplifier input against indefinite 120V AC line faults in portable multimeters. IC Role / Device Role / Timing Role: Fault-tolerant analog switch leveraging internal diode clamping and guaranteed 1pA leakage to limit error to 0.39µV at room temperature. Use Value: Eliminates need for external protection diodes and reduces BOM count while sustaining 110V AC fault indefinitely per channel. |
Use Scenario: Selecting between 8 high-voltage calibration sources (±100V) in automated test equipment with guarded triax connections. IC Role / Device Role / Timing Role: High-isolation (84dB), low-charge-injection (4pC) differential switch minimizing transients during source switching. Use Value: Enables <1µs settling after channel change, supporting 1000-point calibration sequences in under 2 seconds without manual intervention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar differential analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX359EWE+ | Same pinout, identical electrical specs, but rated only for 0°C to +70°C commercial temp range. | Not qualified for extended industrial (-40°C to +85°C) or automotive ambient conditions. | Select MAX329EWE+ when operating outside 0°C–70°C or requiring full MIL-STD-883 traceability per Maxim's E-grade testing. |
| DG509DJ+ | Higher on-resistance (4.5kΩ typ), higher leakage (50pA typ), no fault-tolerance design validation. | Lacks guaranteed 1pA leakage and integrated fault-clamp diodes - requires external protection components. | Choose MAX329EWE+ when sub-40nV offset error, 120V AC fault survival, or extended temperature reliability are mandatory. |
Compared with MAX359EWE+, the MAX329EWE+ provides extended temperature support and full production screening for industrial use; compared with DG509DJ+, it delivers 50× lower leakage, 40% lower RDS(ON), and validated fault tolerance - directly improving measurement accuracy and system robustness without layout changes.
Availability
MAX329EWE+ is available at Aetrix Electronics and suitable for industrial data acquisition, aircraft display systems, fault-tolerant sensor interfaces, and high-voltage test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX329EWE+ 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, mixed-signal, and power-management ICs for demanding industrial, medical, and aerospace applications.
The MAX329EWE+ belongs to Maxim's ultra-low-leakage analog switch family, engineered specifically for high-accuracy data acquisition and fault-resilient signal routing where leakage-induced offset and rail-to-rail performance are non-negotiable.
FAQ
What is the maximum continuous analog signal voltage the MAX329EWE+ can handle?
The MAX329EWE+ supports analog signals from V– to V+, with absolute maximum ratings of –2V to (V+ + 2V) on any terminal. When operated with ±15V supplies, it reliably handles ±15V analog signals across its full specified temperature range. The device also withstands indefinite 120V AC faults when used with external 39kΩ resistors, as validated in Figure 4 of the MAX329EWE+ datasheet.
Does the MAX329EWE+ require external protection diodes for fault tolerance?
No, the MAX329EWE+ does not require external protection diodes. Its internal diode clamping structure limits input voltage to ±15.7V with ±15V supplies, and combined with guaranteed ≤1pA leakage, it achieves fault-tolerant operation when paired with 39kΩ or higher series resistors - as demonstrated in the typical operating circuit (Figure 4) of the MAX329EWE+ datasheet.
Is the MAX329EWE+ pin-compatible with the DG509 multiplexer?
Yes, the MAX329EWE+ is explicitly specified as pin-compatible with the DG509 in the MAX329EWE+ datasheet. Both devices share identical pin assignments for V+, V–, GND, EN, A0, A1, S1A–S4A, S1B–S4B, DA, and DB in the 16-pin SO package - enabling direct replacement without PCB modification.
What is the typical on-resistance matching between channels in the MAX329EWE+?
The MAX329EWE+ guarantees channel-to-channel on-resistance matching within 2%, calculated as (RDS(ON)max – RDS(ON)min) / RDS(ON)ave. This tight matching ensures consistent gain and phase response across all four differential pairs, which is critical for differential signal integrity in instrumentation and audio routing applications using the MAX329EWE+.
Can the MAX329EWE+ operate with unbalanced supply voltages such as +12V and –5V?
Yes, the MAX329EWE+ is fully specified to operate with unbalanced supply combinations including +12V/–5V and +5V/–15V. Its design accommodates independent positive and negative rail tolerances, maintaining full functionality, leakage performance, and switching speed - making it suitable for mixed-voltage systems where the MAX329EWE+ interfaces between disparate power domains.
MAX329EWE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Switch Circuit:
- SP4T
- Multiplexer/Demultiplexer Circuit:
- 4:1
- Number of Circuits:
- 2
- On-State Resistance (Max):
- 3.5kOhm
- Channel-to-Channel Matching (ΔRon):
- 70Ohm
- Voltage - Supply, Single (V+):
- 10V ~ 30V
- Voltage - Supply, Dual (V±):
- ±5V ~ 18V
- Switch Time (Ton, Toff) (Max):
- 1.5µs, 1µs
- -3db Bandwidth:
- -
- Charge Injection:
- 2pC
- Channel Capacitance (CS(off), CD(off)):
- 1.8pF, 8pF
- Current - Leakage (IS(off)) (Max):
- 10pA
- Crosstalk:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
MAX329EWE+ FAQ
1.How can I place an order for MAX329EWE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX329EWE+ 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 MAX329EWE+ reliable?
The price and inventory of MAX329EWE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX329EWE+ is usually 5 days.
3.What payment methods are accepted for MAX329EWE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX329EWE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX329EWE+?
MAX329EWE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX329EWE+ 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 MAX329EWE+?
For technical support, including MAX329EWE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX329EWE+ requirements.
6.How does Aetrix verify that MAX329EWE+ is sourced from the original manufacturer or authorized distributors?
All MAX329EWE+ 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 MAX329EWE+ meets industry standards.
7.What is the process for return or replacement of MAX329EWE+?
All MAX329EWE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX329EWE+, 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 MAX329EWE+ part is unused and in its original packaging.
Return procedure for MAX329EWE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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