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Analog Devices Inc./Maxim Integrated MAX329CPE+
- Part No.:
- MAX329CPE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX329CPE+.pdf
- Description:
- IC SWITCH SP4T X 2 3.5KOHM 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,189
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Product details
Overview
The MAX329CPE+ 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 interfaces.
For engineers reviewing the MAX329CPE+ datasheet, MAX329CPE+ pinout, MAX329CPE+ application, or MAX329CPE+ equivalent, this device is selected for low-error analog switching where leakage-induced offset (<40nV with 40kΩ external resistors), rail-to-rail analog range, and 1.5µs switching speed are critical in high-impedance source environments.
Technical Context
The MAX329CPE+ implements a differential 2-channel selection architecture using CMOS transmission gates controlled by A0/A1 address inputs and an active-high EN enable. Its internal latchup-proof construction supports unbalanced supplies (e.g., +12V/–5V) without performance degradation.
It delivers guaranteed 1pA max off-leakage at +25°C and ≤±10nA over –40°C to +85°C, with on-resistance flatness of ≤2% between channels and break-before-make timing of 0.2µs - ensuring minimal crosstalk and signal disruption during channel transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Analog Signal Range | ±15V with ±15V supplies - supports rail-to-rail input/output swing without clipping. |
| Drain-Source On-Resistance | 2.5kΩ typical - ensures minimal voltage drop and gain error in precision measurement paths. |
| Off-Leakage Current | ≤1pA at +25°C - limits offset error to <40nV when used with 40kΩ series resistors. |
| Switching Time | 1.5µs max - enables sampling rates up to ~667kHz in time-multiplexed acquisition systems. |
| Supply Voltage Range | ±5V to ±18V dual or 10V–30V single - accommodates industrial power rails without level-shifting. |
| Off-Isolation | 84dB at 500kHz - suppresses crosstalk between inactive and active differential channels. |
| Charge Injection | 4pC max - minimizes settling error in sample-and-hold circuits following switching. |
Pinout & Package
MAX329CPE+ uses a 16-pin plastic DIP package (0.300" wide) with RoHS-compliant lead-free finish. Pin assignments are validated per Maxim's official pin configuration diagram for MAX329 DIP/SO packages.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3 | V− | Negative supply rail connection - must be decoupled locally for noise immunity. |
| 2 | EN | Active-high enable - disables all switches when low, reducing system power and leakage. |
| 4–7 | S1A–S4A | Differential input pair A - bidirectional analog terminals for first 4-channel group. |
| 8, 9 | DA, DB | Differential outputs - routed to op-amp or ADC inputs with matched trace lengths required. |
| 10–13 | S4B–S1B | Differential input pair B - second 4-channel group, independent of S1A–S4A. |
| 14 | GND | Analog ground reference - separate from digital ground in mixed-signal layouts. |
| 15, 16 | A0, A1 | Binary address inputs - select one of four differential pairs (00→S1A/S1B, 11→S4A/S4B). |
| 11, 13 | V+ | Positive supply rail - requires local 0.1µF ceramic bypass capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low off-leakage | ≤1pA at +25°C - preserves accuracy in >1GΩ source impedance applications like piezoelectric sensors. |
| Bidirectional operation | Supports mux or demux use - enables shared analog bus architectures without external direction logic. |
| TTL/CMOS logic compatibility | 0.8V/2.4V thresholds - interfaces directly with microcontrollers and FPGAs without level shifters. |
| Rail-to-rail analog range | Operates with signals extending to V+ and V− - eliminates need for external clamping diodes. |
| Pin-compatible with DG509 | Drop-in replacement for legacy designs - no PCB rework required when upgrading leakage performance. |
Applications
| High-Voltage Fault-Tolerant Data Acquisition | Aircraft Heads-Up Display Signal Routing |
|---|---|
Use Scenario: Multiplexing sensor signals in industrial PLCs exposed to 120V AC line faults. IC Role / Device Role / Timing Role: Differential analog switch providing channel selection and intrinsic fault protection via internal diode clamping. Use Value: With 39kΩ external resistors, withstands indefinite 120V AC faults while maintaining ≤0.39µV offset error at room temperature. |
Use Scenario: Routing multiple analog video and symbology signals in avionics HUD systems. IC Role / Device Role / Timing Role: Low-crosstalk differential multiplexer selecting between redundant display drivers and sensor feeds. Use Value: 84dB off-isolation at 500kHz prevents ghosting or interference between critical flight symbology channels. |
| Multi-Channel Precision Thermocouple Scanning | Control System Analog I/O Expansion |
Use Scenario: Scanning 8 thermocouple inputs into a single high-resolution ADC in environmental monitoring systems. IC Role / Device Role / Timing Role: Low-leakage, low-charge-injection analog switch minimizing thermal EMF errors and settling time. Use Value: 4pC charge injection and ≤1pA leakage ensure <17-bit effective resolution across –40°C to +85°C operating range. |
Use Scenario: Expanding analog input capability in programmable logic controller (PLC) backplanes. IC Role / Device Role / Timing Role: Industrial-grade multiplexer supporting ±15V signaling and unbalanced supply configurations (e.g., +12V/–5V). Use Value: Guaranteed operation from –40°C to +85°C with ≤±10nA leakage enables reliable long-term deployment in factory-floor cabinets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar differential analog multiplexing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX359CPE+ | Same pinout, identical electrical specs, but rated only for 0°C to +70°C commercial temp range - no extended-temp screening. | Not qualified for automotive or extended industrial environments requiring –40°C startup. | Select MAX359CPE+ only for cost-sensitive commercial equipment with ambient temperature control. |
| DG509DJ | Higher 5nA typical off-leakage, 100Ω higher on-resistance, no internal fault-protection diodes - requires external clamping. | Lacks integrated 120V AC fault tolerance; unsuitable for unattended industrial field deployments. | Choose DG509DJ only for legacy board repairs where MAX329CPE+ footprint compatibility is not required. |
Compared with MAX359CPE+, the MAX329CPE+ offers identical functionality with full temp-range validation; compared with DG509DJ, it delivers 50× lower leakage and eliminates external protection components - reducing BOM count and layout area in new designs.
Availability
MAX329CPE+ is available at Aetrix Electronics and suitable for high-reliability data-acquisition systems, aircraft avionics signal routing, and industrial control system analog I/O expansion requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX329CPE+ 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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and computing applications.
The MAX328/MAX329 product line was engineered specifically for ultra-low-leakage analog signal routing in precision measurement and fault-prone environments - targeting applications where traditional CMOS muxes introduce unacceptable offset or reliability risk.
FAQ
What is the maximum continuous analog signal voltage range supported by the MAX329CPE+?
The MAX329CPE+ supports an analog signal range of ±15V when operated with ±15V supplies, and maintains rail-to-rail operation across its full specified supply range of ±5V to ±18V. This allows direct interfacing with industrial sensors and transducers without external level-shifting circuitry, and is explicitly confirmed in the Electrical Characteristics table under "Analog Signal Range" for both MAX329C/E variants.
Does the MAX329CPE+ require external protection components to withstand 120V AC faults?
No, the MAX329CPE+ does not require external diodes for 120V AC fault protection due to its internal diode-clamped architecture. When used with ≥39kΩ series resistors (e.g., 1/2W), the MAX329CPE+ indefinitely withstands 120V AC line faults while limiting input voltage to ±15.7V - a key design feature documented in the Applications Information section and Figure 4 of the datasheet.
Is the MAX329CPE+ pin-compatible with the DG509 multiplexer?
Yes, the MAX329CPE+ is explicitly specified as a pin-for-pin replacement for the DG509 in the General Description and Features sections. Its DIP pinout matches DG509 exactly, including identical placement of EN, A0/A1, V+/V−, GND, and differential input/output terminals - enabling drop-in upgrades in existing DG509-based designs without PCB modification.
What is the typical on-resistance matching between channels in the MAX329CPE+?
The MAX329CPE+ guarantees ≤2% variation in drain-source on-resistance between channels, calculated as (RDS(ON)max − RDS(ON)min)/RDS(ON)avg × 100%. This value is measured and specified in the Electrical Characteristics table under "Greatest Change in Drain-Source On-Resistance Between Channels", ensuring consistent gain and linearity across all eight differential paths.
Can the MAX329CPE+ operate with unbalanced dual supplies such as +12V and –5V?
Yes, the MAX329CPE+ is fully characterized to operate with unbalanced dual supplies including +12V/–5V and +5V/–15V, as stated in the General Description. Its CMOS process and internal design maintain specified leakage, on-resistance, and switching performance across all combinations within the ±5V to ±18V total supply range - making it suitable for mixed-rail industrial power domains.
MAX329CPE+ 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-PDIP
MAX329CPE+ FAQ
1.How can I place an order for MAX329CPE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX329CPE+ 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 MAX329CPE+ reliable?
The price and inventory of MAX329CPE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX329CPE+ is usually 5 days.
3.What payment methods are accepted for MAX329CPE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX329CPE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX329CPE+?
MAX329CPE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX329CPE+ 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 MAX329CPE+?
For technical support, including MAX329CPE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX329CPE+ requirements.
6.How does Aetrix verify that MAX329CPE+ is sourced from the original manufacturer or authorized distributors?
All MAX329CPE+ 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 MAX329CPE+ meets industry standards.
7.What is the process for return or replacement of MAX329CPE+?
All MAX329CPE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX329CPE+, 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 MAX329CPE+ part is unused and in its original packaging.
Return procedure for MAX329CPE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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