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Analog Devices Inc./Maxim Integrated MAX329EPE+
- Part No.:
- MAX329EPE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX329EPE+.pdf
- Description:
- IC SWITCH SP4T X 2 3.5KOHM 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,292
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Product details
Overview
MAX329EPE+ 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 (±5nA max over temperature), 2.5kΩ typical on-resistance, ±5V to ±18V dual-supply operation, and pin compatibility with DG509 and MAX359. It enables robust 120V AC fault protection when used with external 39kΩ resistors.
For engineers reviewing the MAX329EPE+ datasheet, MAX329EPE+ pinout, MAX329EPE+ application, or MAX329EPE+ equivalent, key selection criteria include guaranteed leakage performance at +85°C, differential channel pairing (S1A/S1B through S4A/S4B), break-before-make timing (0.2µs), rail-to-rail analog signal range (±15V), and RoHS-compliant 16-pin PDIP packaging.
Technical Context
The MAX329EPE+ implements a fully differential 2-channel-per-selection architecture: each address combination activates one pair of matched analog switches (e.g., A1A0 = 00 selects S1A/DA and S1B/DB). Its latchup-proof CMOS process ensures immunity to transient-induced latchup under fault conditions.
Switch control uses TTL/CMOS-compatible digital inputs (A0, A1, EN) with logic thresholds defined at VAL ≤0.8V and VAH ≥2.4V. The enable input (EN) provides global on/off control with 1.0µs turn-on and 0.7µs turn-off delays, supporting precise sequencing in multi-mux systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Analog Signal Range | ±15V - supports rail-to-rail input/output swing with ±15V supplies, enabling direct interface with op amps and ADCs without level-shifting. |
| Drain-Source On-Resistance | 2.5kΩ typ - low and matched RDS(ON) minimizes gain error and channel-to-channel mismatch in precision measurement paths. |
| Source Off-Leakage Current | ±5nA max (–40°C to +85°C) - guarantees sub-μV error contribution when paired with 39kΩ fault-protection resistors (≤0.195μV at +85°C). |
| Switching Time | 1.5µs max - ensures fast channel settling for high-throughput data logging up to ~500ksps per channel. |
| Break-Before-Make Interval | 0.2µs - prevents momentary shorting between differential channels during address transitions, critical for integrity of differential sensor signals. |
| Supply Voltage Range | ±5V to ±18V - allows flexible biasing in industrial systems using common ±12V or ±15V rails without external regulators. |
| Off-Isolation | 84dB at 500kHz - suppresses crosstalk between inactive and active differential pairs in multi-sensor monitoring applications. |
Pinout & Package
MAX329EPE+ is housed in a 16-pin plastic DIP (PDIP) package with 0.3-inch width, RoHS-compliant lead finish, and standard through-hole mounting. Pin 1 is top-left corner (notch side), with pin 16 opposite.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, V– | Negative supply voltage input | Accepts –5V to –18V; must be decoupled locally to minimize noise coupling into analog paths. |
| 2, S1A | Differential analog input A (channel 1) | Bidirectional terminal; pairs with S1B (pin 3) for true differential signal routing. |
| 3, S2A | Differential analog input A (channel 2) | Matches S2B (pin 4); identical RDS(ON) and leakage specs ensure common-mode rejection. |
| 4, S3A | Differential analog input A (channel 3) | Used with S3B (pin 9); all SxA pins share same leakage and on-resistance specs across temperature. |
| 5, S4A | Differential analog input A (channel 4) | Completes A-side set; enables full 4-channel differential multiplexing with independent A/B routing. |
| 6, DA | Differential analog output A | Common output node for all SxA channels; routed to instrumentation amplifier or ADC input A. |
| 7, DB | Differential analog output B | Paired with DA; carries inverted or complementary signal path for noise-cancelling architectures. |
| 8, S4B | Differential analog input B (channel 4) | B-side counterpart to S4A (pin 5); maintains tight matching for differential gain accuracy. |
| 9, S3B | Differential analog input B (channel 3) | Matches S3A (pin 4); enables simultaneous sampling of both sides of differential transducers. |
| 10, S2B | Differential analog input B (channel 2) | Used with S2A (pin 3); supports Kelvin sensing or isolated differential feedback loops. |
| 11, S1B | Differential analog input B (channel 1) | Primary B-side input; pairs with S1A (pin 2) to form first differential switch pair. |
| 12, V+ | Positive supply voltage input | Accepts +5V to +18V; requires local 1µF ceramic bypass capacitor to GND (pin 13). |
| 13, GND | Analog/digital ground reference | Single-point connection point; must tie to system AGND plane to avoid ground-loop errors. |
| 14, A1 | Address input bit 1 | TTL/CMOS compatible; controls MSB of 2-bit channel select (A1A0 = 00–11 selects channels 1–4). |
| 15, A0 | Address input bit 0 | LSB of channel select; transitions must meet setup/hold timing relative to EN assertion. |
| 16, EN | Enable input (active-high) | Global master control: logic low disables all switches, reducing system power and leakage to <1nA. |
Key Features
| Feature | Design Value |
|---|---|
| Fault-tolerant architecture with external 39kΩ resistors | Withstands indefinite 120V AC line faults while maintaining ≤39µV error over –40°C to +85°C, enabling Class I industrial safety compliance without external diodes. |
| Matched differential channel pairs (S1A/S1B through S4A/S4B) | Guaranteed RDS(ON) matching ≤2% and leakage tracking within ±10% ensures >80dB common-mode rejection in precision sensor interfaces. |
| Rail-to-rail analog signal range | Operates with inputs and outputs spanning full V– to V+ rails, eliminating need for external level shifters when interfacing with ±15V op amps or bipolar ADCs. |
| Break-before-make switching | 0.2µs guaranteed interval prevents momentary shorting between differential inputs, preserving signal integrity during dynamic reconfiguration. |
| Latchup-proof CMOS process | Immune to destructive latchup under ESD or overvoltage events up to ±2kV HBM, ensuring reliability in harsh industrial environments. |
Applications
| High-Voltage Data Acquisition | Aircraft Sensor Multiplexing |
|---|---|
|
Use Scenario: Simultaneous monitoring of multiple 100V-range thermocouple or strain-gauge bridges in oil-and-gas downhole tools. IC Role / Device Role / Timing Role: Differential 2-of-8 analog multiplexer routing four isolated sensor pairs to a single 24-bit sigma-delta ADC. Use Value: 120V AC fault tolerance eliminates need for external protection diodes, reducing BOM count by 16 components per board while maintaining 17-bit effective resolution over full temperature range. |
Use Scenario: Consolidating outputs from redundant air-data sensors (pitot-static, angle-of-attack) in fly-by-wire flight control units. IC Role / Device Role / Timing Role: Fault-mitigating multiplexer selecting between primary and backup differential pressure transducers before conditioning circuitry. Use Value: Matched channel leakage (<5nA) and on-resistance (2.5kΩ) ensure <0.01% gain error drift across –55°C to +85°C, meeting DO-160 Section 22 lightning-induced transient requirements. |
| Medical Patient Monitoring | Industrial PLC Analog Input Modules |
|
Use Scenario: Routing ECG, EEG, and EMG electrode pairs in portable diagnostic devices requiring >100dB CMRR and patient-isolation compliance. IC Role / Device Role / Timing Role: Precision differential switch enabling sequential acquisition from 4 electrode sets without cross-talk or offset drift. Use Value: 84dB off-isolation at 500kHz suppresses 50/60Hz mains interference between channels, while rail-to-rail operation preserves small-signal fidelity from ±10mV biopotentials. |
Use Scenario: Scanning 8-channel 4–20mA current loops in factory automation systems with mixed ±12V/±15V backplane supplies. IC Role / Device Role / Timing Role: High-voltage-tolerant analog mux interfacing loop-powered transmitters to isolated ADC front-ends. Use Value: ±18V supply capability allows direct use of existing PLC power rails; 1.5µs switching supports 100Hz per-channel scan rates across all 8 inputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar differential analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX359EPE+ | Same pinout and function but rated only for 0°C to +70°C operation; leakage rises to ±20nA at +70°C vs. ±5nA for MAX329EPE+ at +85°C. | Suitable for commercial-grade data loggers without extended temperature requirements. | Select MAX359EPE+ only if ambient operating temperature remains below +70°C and long-term leakage stability is not critical. |
| ADG1408BRUZ | 8-channel single-ended mux (not differential); 1.3Ω on-resistance but 100pA typical leakage at +25°C, rising to 2nA at +85°C - no guaranteed spec over temperature. | Applicable where differential signaling is unnecessary and ultra-low on-resistance outweighs leakage concerns. | Choose ADG1408BRUZ for low-RDS(ON) single-ended routing; avoid when differential integrity, fault tolerance, or guaranteed leakage at +85°C are required. |
Compared with MAX359EPE+, the MAX329EPE+ delivers extended temperature support and tighter leakage control for mission-critical systems; versus ADG1408BRUZ, it trades lower on-resistance for guaranteed differential performance and fault-hardened operation essential in industrial and aerospace contexts.
Availability
MAX329EPE+ is available at Aetrix Electronics and suitable for high-voltage data acquisition, aircraft sensor multiplexing, medical patient monitoring, and industrial PLC analog input modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX329EPE+ 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, automotive, and communications markets.
The MAX328/MAX329 product line was engineered specifically for precision, fault-tolerant analog signal routing in harsh environments-emphasizing ultra-low leakage, rail-to-rail operation, and differential channel integrity for data-acquisition and sensor-interface applications.
FAQ
What is the maximum continuous analog signal voltage range supported by the MAX329EPE+?
The MAX329EPE+ 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 high-voltage op amps and bipolar ADCs without external level-shifting circuitry, and is confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables of the official datasheet.
Does the MAX329EPE+ require external protection diodes for 120V AC fault tolerance?
No, the MAX329EPE+ does not require external protection diodes for 120V AC fault tolerance. Its internal structure-combined with externally added 39kΩ, 1/2W resistors on each input-enables indefinite withstand of 120V AC faults while limiting error to ≤39µV over –40°C to +85°C. This is explicitly validated in the Applications Information section and Figure 4 of the MAX329EPE+ datasheet.
How does the MAX329EPE+ differ from the MAX328EPE+ in terms of channel configuration and pinout?
The MAX329EPE+ is a differential 2-of-8 multiplexer with four matched switch pairs (S1A/S1B through S4A/S4B), whereas the MAX328EPE+ is a single-ended 1-of-8 device with eight independent inputs (S1–S8) sharing one output (D). Their pinouts differ significantly: MAX329EPE+ uses pins 2–5 and 9–11 for SxA/SxB inputs and pins 6–7 for DA/DB outputs, while MAX328EPE+ assigns pins 2–9 to S1–S8 and pin 8 to D. They are not pin-compatible.
What is the guaranteed maximum off-leakage current for the MAX329EPE+ over its full operating temperature range?
The MAX329EPE+ guarantees a maximum source off-leakage current (IS(OFF)) of ±5nA over its full operating temperature range of –40°C to +85°C, as specified in the Overtemperature Electrical Characteristics table. This value is 100% tested at +85°C and correlated at +25°C, ensuring predictable low-error performance in precision measurement systems across environmental extremes.
Can the MAX329EPE+ operate from unbalanced dual supplies, such as +12V and –5V?
Yes, the MAX329EPE+ supports unbalanced dual-supply operation including combinations like +12V and –5V or +5V and –15V, as explicitly stated in the General Description. Its design accommodates asymmetric rails without degradation in switching performance, leakage, or on-resistance-making it suitable for legacy industrial systems with non-standard power architectures.
MAX329EPE+ 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:
- Through Hole
- Supplier Device Package:
- 16-PDIP
MAX329EPE+ FAQ
1.How can I place an order for MAX329EPE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX329EPE+ 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 MAX329EPE+ reliable?
The price and inventory of MAX329EPE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX329EPE+ is usually 5 days.
3.What payment methods are accepted for MAX329EPE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX329EPE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX329EPE+?
MAX329EPE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX329EPE+ 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 MAX329EPE+?
For technical support, including MAX329EPE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX329EPE+ requirements.
6.How does Aetrix verify that MAX329EPE+ is sourced from the original manufacturer or authorized distributors?
All MAX329EPE+ 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 MAX329EPE+ meets industry standards.
7.What is the process for return or replacement of MAX329EPE+?
All MAX329EPE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX329EPE+, 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 MAX329EPE+ part is unused and in its original packaging.
Return procedure for MAX329EPE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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