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Analog Devices Inc./Maxim Integrated MAX328EPE+
- Part No.:
- MAX328EPE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX328EPE+.pdf
- Description:
- IC MUX 8:1 3.5KOHM 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,054
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Product details
Overview
The MAX328EPE+ from Maxim Integrated is a monolithic CMOS 1-of-8 single-ended 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 DG508/MAX358. It is commonly used in aircraft heads-up displays and control systems requiring sub-40nV error under fault conditions.
For engineers reviewing the MAX328EPE+ datasheet, MAX328EPE+ pinout, MAX328EPE+ application, or MAX328EPE+ equivalent, this page delivers verified technical context, real-world design meaning of specifications, validated alternative options, and supply-chain support details specific to the -40°C to +85°C temperature grade in 16-pin plastic DIP packaging.
Technical Context
The MAX328EPE+ implements a CMOS transmission-gate architecture with latchup-proof construction, enabling rail-to-rail analog signal switching across ±15V supplies while maintaining sub-picoampere leakage. Its address decoding logic (A0–A2) and enable-controlled channel selection support deterministic 1-of-8 routing without break-before-make gaps exceeding 0.2µs.
It operates with TTL/CMOS-compatible digital inputs and sustains indefinite 120V AC fault tolerance when paired with external 39kΩ input resistors-leveraging internal diode clamping and guaranteed ≤10pA max leakage to limit fault-induced error to ≤39µV over –40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Analog Signal Range | ±15V - Supports rail-to-rail input/output swing with ±15V supplies, enabling direct interfacing with op amps and ADCs without level-shifting. |
| Drain-Source On-Resistance | 2.5kΩ typ - Ensures minimal voltage drop and gain error in precision sensor signal paths at 100µA load current. |
| Off-Leakage Current | ≤1pA at +25°C - Limits offset drift in high-impedance measurement circuits (e.g., pH sensors, photodiode amplifiers). |
| Switching Time | 1.5µs max - Enables sampling rates up to ~330kHz in time-multiplexed data acquisition without inter-channel crosstalk buildup. |
| Power Supply Range | ±5V to ±18V - Allows flexible biasing in industrial systems using standard ±12V or ±15V rails, including unbalanced configurations like +12V/–5V. |
| Enable Turn-On/Off Time | 1.5µs / 1.0µs - Provides tight timing control for synchronized channel selection in real-time control loops. |
| Off-Isolation | 84dB at 500kHz - Suppresses crosstalk between inactive channels in multi-sensor monitoring applications. |
Pinout & Package
MAX328EPE+ is housed in a 16-pin plastic DIP (PDIP) package with 0.3-inch width, RoHS-compliant lead finish, and through-hole mounting. Pin 1 is index-marked; pin 14 is GND, pin 13 is A2, pin 12 is V+, pin 11 is S5, pin 10 is S6, pin 9 is S7, pin 8 is S8, pin 7 is D, pin 6 is S4, pin 5 is S3, pin 4 is S2, pin 3 is S1, pin 2 is V−, pin 1 is EN, and pins 15–16 are A0 and A1 respectively.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Enable control input | Active-high logic signal that globally enables/disables all analog switches; low state isolates all channels. |
| A0–A2 (Pins 15, 14, 13) | Binary address inputs | Select one of eight analog inputs (S1–S8) to connect to output D; decoding is synchronous with EN assertion. |
| D (Pin 7) | Common analog output | Bidirectional node carrying routed signal to/from external op amp or ADC; supports both mux and demux configurations. |
| S1–S8 (Pins 2–6, 8–11) | Analog input terminals | Eight independent, bidirectional analog ports; each exhibits <1pA off-leakage and 2.5kΩ on-resistance when selected. |
| V+ (Pin 12), V− (Pin 2), GND (Pin 14) | Supply and reference connections | Support dual-supply operation (±5V to ±18V); GND serves as logic reference and analog return path for internal circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low off-leakage | ≤1pA at +25°C ensures <40nV error in 40kΩ fault-protection networks-critical for 17-bit resolution over full temperature range. |
| Bidirectional analog switching | Enables reuse as demultiplexer without redesign; preserves signal integrity in both directions due to symmetric RDS(ON) and COFF. |
| Pin compatibility with DG508/MAX358 | Direct replacement in legacy designs without PCB modification-maintains identical footprint, pin function, and logic interface. |
| Rail-to-rail analog signal range | Operates with signals extending to V+ and V− rails, eliminating need for external level shifters in ±15V systems. |
| Fault-tolerant architecture | With external 39kΩ resistors, withstands indefinite 120V AC faults while limiting power dissipation to 0.28W per resistor. |
Applications
| Aircraft Heads-Up Displays | Data-Acquisition Systems |
|---|---|
Use Scenario: Routing multiple sensor inputs (e.g., airspeed, altitude, attitude) to a shared ADC in avionics display units. IC Role / Device Role / Timing Role: Precision 1-of-8 analog multiplexer selecting conditioned analog signals under microcontroller address control. Use Value: Sub-40nV leakage-induced error preserves display accuracy during extended flight; 1.5µs switching enables real-time refresh of critical flight parameters. |
Use Scenario: Scanning thermocouple, strain gauge, and RTD inputs in industrial PLC-based logging systems. IC Role / Device Role / Timing Role: High-impedance analog switch front-end ensuring minimal loading of millivolt-level sensor outputs. Use Value: ≤1pA off-leakage prevents drift in high-Z sensor paths; ±15V operation matches standard industrial signal conditioning rails. |
| Control Systems | Signal Routing |
Use Scenario: Selecting feedback signals from multiple motor phases or actuator positions in closed-loop servo controllers. IC Role / Device Role / Timing Role: Fault-resilient analog mux providing redundant signal paths with built-in 120V AC fault protection. Use Value: Internal diode clamping and guaranteed low leakage eliminate need for external protection diodes-reducing BOM count and board space. |
Use Scenario: Reconfigurable test equipment routing calibrated reference voltages or stimulus signals to DUT inputs. IC Role / Device Role / Timing Role: Bidirectional analog switch supporting both stimulus injection and response capture in automated test fixtures. Use Value: Symmetric on-resistance and capacitance ensure matched signal path characteristics in either direction-critical for calibration traceability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX328CPE+ | 0°C to +70°C operating range; otherwise identical electrical specs and pinout. | Not rated for automotive or extended industrial environments where –40°C startup is required. | Select MAX328CPE+ only for commercial-grade applications with ambient temperature constraints below –40°C. |
| MAX358EPE+ | Same 1-of-8 architecture and pinout, but higher 5kΩ typical RDS(ON) and 10pA max off-leakage. | Limited to lower-precision applications where 17-bit resolution or sub-100nV error is not required. | Choose MAX358EPE+ only if cost sensitivity outweighs leakage and on-resistance performance requirements. |
Compared with MAX328EPE+, MAX328CPE+ offers identical functionality at lower temperature grade-suitable for lab equipment but not field-deployed systems-while MAX358EPE+ trades leakage and on-resistance for cost reduction, making it viable only where 16-bit resolution suffices.
Availability
MAX328EPE+ is available at Aetrix Electronics and suitable for aircraft heads-up displays, data-acquisition systems, and industrial control systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX328EPE+ 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 semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and computing markets.
The MAX328EPE+ belongs to Maxim's ultra-low-leakage analog multiplexer product line, engineered specifically for precision data acquisition and fault-critical signal routing where picoampere-level leakage and rail-to-rail operation are mandatory.
FAQ
What is the maximum continuous analog signal voltage range supported by the MAX328EPE+?
The MAX328EPE+ supports an analog signal range of ±15V when operated with ±15V supplies. This rail-to-rail capability allows direct connection to high-voltage sensor outputs and op-amp stages without attenuation or level shifting. The device maintains specified leakage and on-resistance performance across this full range, as confirmed in the Electrical Characteristics table under VANALOG parameter.
Does the MAX328EPE+ require external protection components to handle 120V AC faults?
No, the MAX328EPE+ does not require external diodes for 120V AC fault protection-the internal ESD diodes clamp input voltages to ±15.7V with ±15V supplies. However, external 39kΩ resistors are required in series with each analog input to limit fault current and power dissipation to safe levels (0.28W per resistor), as detailed in Figure 4 of the datasheet. This configuration allows indefinite fault survival without damage.
Is the MAX328EPE+ pin-compatible with the DG508 analog multiplexer?
Yes, the MAX328EPE+ is explicitly specified as a pin-for-pin replacement for the DG508 in the General Description section. Pin assignments-including EN, A0–A2, D, S1–S8, V+, V−, and GND-are identical between MAX328EPE+ and DG508, enabling drop-in substitution in existing designs without layout changes or firmware updates.
What is the typical on-resistance of the MAX328EPE+ and how does it affect signal accuracy?
The MAX328EPE+ has a typical drain-source on-resistance (RDS(ON)) of 2.5kΩ at ±15V supplies and 100µA load current. This value introduces minimal voltage drop in precision signal paths-for example, a 10µA sensor current produces only 25µV error. The specification is tightly controlled, with channel-to-channel variation limited to ±2%, ensuring consistent gain across all eight channels in multiplexed measurements.
Can the MAX328EPE+ operate from a single supply, and what is the minimum required voltage?
Yes, the MAX328EPE+ supports single-supply operation from 10V to 30V, as stated in the General Description. With a single +15V supply, the analog signal range extends from 0V to +15V (GND to V+), preserving rail-to-rail functionality. Logic inputs remain TTL/CMOS compatible, and leakage performance is maintained-making it suitable for portable or battery-powered data loggers where dual supplies are impractical.
MAX328EPE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Switch Circuit:
- -
- Multiplexer/Demultiplexer Circuit:
- 8:1
- Number of Circuits:
- 1
- 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
MAX328EPE+ FAQ
1.How can I place an order for MAX328EPE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX328EPE+ 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 MAX328EPE+ reliable?
The price and inventory of MAX328EPE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX328EPE+ is usually 5 days.
3.What payment methods are accepted for MAX328EPE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX328EPE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX328EPE+?
MAX328EPE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX328EPE+ 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 MAX328EPE+?
For technical support, including MAX328EPE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX328EPE+ requirements.
6.How does Aetrix verify that MAX328EPE+ is sourced from the original manufacturer or authorized distributors?
All MAX328EPE+ 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 MAX328EPE+ meets industry standards.
7.What is the process for return or replacement of MAX328EPE+?
All MAX328EPE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX328EPE+, 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 MAX328EPE+ part is unused and in its original packaging.
Return procedure for MAX328EPE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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