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Analog Devices Inc./Maxim Integrated MAX328CPE+
- Part No.:
- MAX328CPE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX328CPE+.pdf
- Description:
- IC MUX 8:1 3.5KOHM 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,497
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Product details
Overview
The MAX328CPE+ from Maxim Integrated is a monolithic CMOS 1-of-8 single-ended analog multiplexer with ultra-low off-leakage (1pA typ at +25°C), 2.5kΩ on-resistance, and ±15V dual-supply operation. It serves as a precision signal-routing device in high-impedance data-acquisition paths, enabling fault-tolerant operation up to 110V AC when paired with external 40kΩ input resistors, and is pin-compatible with DG508 and MAX358.
For engineers reviewing the MAX328CPE+ datasheet, MAX328CPE+ pinout, MAX328CPE+ application, or MAX328CPE+ equivalent, this device is selected for low-error analog switching in control systems, aircraft displays, and portable instrumentation where leakage-induced offset and rail-to-rail signal handling are critical design constraints.
Technical Context
The MAX328CPE+ implements a CMOS transmission-gate architecture with latchup-proof construction and break-before-make switching (0.2µs tOPEN). Its address decoding logic accepts TTL/CMOS-compatible inputs (A0–A2) and enables bidirectional analog signal flow between eight inputs (S1–S8) and one common output (D).
It operates across unbalanced supply configurations (e.g., +12V/–5V), supports analog signals spanning the full supply rails (±15V), and delivers sub-1.5µs transition time with 1.9mW power dissipation at ±15V - making it suitable for battery-powered and high-reliability embedded systems requiring long-term stability under thermal stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Analog Signal Range | ±15V - supports rail-to-rail input/output without clipping in ±15V systems |
| On-Resistance (RDS(ON)) | 2.5kΩ typ - ensures minimal gain error and channel-to-channel matching in precision gain stages |
| Off-Leakage Current | 1pA typ at +25°C - limits voltage error to <40nV with 40kΩ input resistors in fault-tolerant designs |
| Switching Time | 1.5µs max - enables sampling rates up to ~667kHz in multiplexed ADC front-ends |
| Supply Voltage Range | ±5V to ±18V or +10V to +30V single supply - accommodates industrial and aerospace power architectures |
| Enable Turn-On/Off Time | tON(EN) = 1.5µs, tOFF(EN) = 1.0µs - allows precise timing control of signal routing windows |
| Off-Isolation (OIRR) | 84dB at 500kHz - suppresses crosstalk between inactive channels in multi-signal monitoring |
Pinout & Package
MAX328CPE+ uses a 16-pin plastic DIP package (0.300" wide) with RoHS-compliant lead-free finish. Pin assignments are fully defined per Maxim's official pin configuration diagram.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | V− | Negative supply rail connection; required for dual-supply operation and rail-to-rail analog range |
| 2–7 | S1–S4 | Bidirectional analog inputs; each connects to internal transmission gate when selected |
| 8 | D | Common bidirectional analog output/input; routed to selected Sx channel |
| 9–12 | S8–S5 | Bidirectional analog inputs; continuation of S1–S4 set for full 1-of-8 selection |
| 13 | A2 | MSB address input; controls channel selection with A1 and A0 per truth table |
| 14 | A1 | Middle address bit; determines 1-of-8 channel mapping in conjunction with A0/A2 |
| 15 | A0 | LSB address input; completes 3-bit binary decode for channel selection |
| 16 | EN | Active-high enable; disables all switches (high-Z state) when logic low |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low off-leakage (1pA typ) | Enables <40nV offset error with 40kΩ input protection resistors, supporting 17-bit resolution over temperature |
| Bidirectional signal path | Permits use as both multiplexer and demultiplexer without external reconfiguration |
| Pin compatibility with DG508/MAX358 | Allows drop-in replacement in legacy designs without PCB layout changes |
| Rail-to-rail analog signal range | Accepts inputs from V− to V+, eliminating level-shifting requirements in ±15V systems |
| Latchup-proof CMOS process | Guarantees immunity to destructive latchup under transient overvoltage or ESD events |
Applications
| Control Systems | Data-Acquisition Systems |
|---|---|
Use Scenario: Routing sensor signals (thermocouples, strain gauges) to a shared precision ADC in industrial PLCs. IC Role / Device Role / Timing Role: Analog multiplexer providing channel-selectable, low-leakage signal path to ADC front-end. Use Value: 1pA leakage prevents microvolt-level offset drift in high-gain instrumentation amplifiers feeding the ADC. |
Use Scenario: Scanning multiple voltage/current inputs in portable multimeters or logging oscilloscopes. IC Role / Device Role / Timing Role: Low-power, rail-to-rail analog switch enabling single-supply (e.g., +12V) operation with minimal quiescent current. Use Value: 1.9mW power dissipation extends battery life while maintaining 1.5µs switching speed for >600ksps multiplexing. |
| Aircraft Heads-Up Displays | Signal Routing |
Use Scenario: Selecting among redundant flight sensor outputs (airspeed, altitude, attitude) for display processing. IC Role / Device Role / Timing Role: Fault-tolerant analog switch configured with 39kΩ input resistors to withstand indefinite 120V AC faults. Use Value: Internal diode clamping and guaranteed 1pA leakage ensure no component damage and <0.39µV error at room temperature. |
Use Scenario: Dynamic reconfiguration of analog signal paths in modular test equipment or automated calibration systems. IC Role / Device Role / Timing Role: Bidirectional, TTL/CMOS-compatible multiplexer controlled by microcontroller GPIOs. Use Value: Break-before-make timing (0.2µs) prevents momentary short-circuits during channel transitions in sensitive analog circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DG508ACJ+ | Higher typical off-leakage (5nA vs. 1pA); 100Ω higher RDS(ON); no fault-tolerance design support | Not suitable for high-resolution, high-impedance, or fault-critical applications | Select only if legacy footprint compatibility is mandatory and leakage <100pA is acceptable |
| MAX358CPE+ | Identical pinout and function; same ultra-low leakage spec but rated for extended temperature (–40°C to +85°C) | Preferred for automotive or outdoor industrial deployments requiring wider operating range | Choose MAX358CPE+ when ambient temperature exceeds +70°C or long-term reliability under thermal cycling is required |
Compared with DG508ACJ+, the MAX328CPE+ reduces leakage-induced offset by 5000× and enables fault-tolerant design; versus MAX358CPE+, it trades extended temperature rating for lower cost in commercial-grade applications.
Availability
MAX328CPE+ is available at Aetrix Electronics and suitable for control systems, data-acquisition systems, and aircraft heads-up displays requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for MAX328CPE+ 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 MAX328CPE+ belongs to Maxim's ultra-low-leakage analog multiplexer product line, designed specifically for precision signal routing in high-impedance, fault-prone environments such as avionics, medical instrumentation, and automated test equipment.
FAQ
What is the maximum continuous analog signal voltage range supported by the MAX328CPE+?
The MAX328CPE+ supports an analog signal range of ±15V when operated with ±15V supplies, and maintains rail-to-rail operation across its full specified supply range (±5V to ±18V). This means input and output signals can swing from V− to V+ without clipping, provided supply voltages remain within absolute maximum ratings (V+ ≤ +44V referenced to V−).
Does the MAX328CPE+ require external protection components to achieve fault tolerance?
Yes - the MAX328CPE+ achieves indefinite 120V AC fault tolerance only when used with external 39kΩ or higher 1/2W resistors on each analog input, as shown in Figure 4 of the datasheet. These resistors limit fault current and power dissipation; the device itself includes internal clamping diodes but does not eliminate the need for series current-limiting resistors.
Is the MAX328CPE+ pin-compatible with the DG508, and what are the key functional differences?
Yes, the MAX328CPE+ is explicitly designed as a pin-for-pin replacement for the DG508 in standard DIP-16 packages. Key functional improvements include 1pA typical off-leakage (vs. 5nA for DG508), lower on-resistance (2.5kΩ vs. ~3.5kΩ), and integrated fault-tolerance capability when used with external resistors - all while maintaining identical logic interface and timing behavior.
What is the operating temperature range of the MAX328CPE+?
The MAX328CPE+ is rated for commercial temperature operation from 0°C to +70°C. This is indicated by the "C" suffix in the part number and confirmed in the Ordering Information table. For extended temperature ranges (–40°C to +85°C), the MAX328EPE+ or MAX358CPE+ should be considered instead.
Can the MAX328CPE+ operate from a single supply, and what is the minimum required voltage?
Yes, the MAX328CPE+ supports single-supply operation from +10V to +30V. The minimum recommended single supply is +10V to ensure proper CMOS logic threshold margins and stable analog switching performance. Operation below +10V may degrade on-resistance matching and increase leakage, as these parameters are characterized down to ±5V dual supply (equivalent to +10V single supply).
MAX328CPE+ 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-PDIP
MAX328CPE+ FAQ
1.How can I place an order for MAX328CPE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX328CPE+ 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 MAX328CPE+ reliable?
The price and inventory of MAX328CPE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX328CPE+ is usually 5 days.
3.What payment methods are accepted for MAX328CPE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX328CPE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX328CPE+?
MAX328CPE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX328CPE+ 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 MAX328CPE+?
For technical support, including MAX328CPE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX328CPE+ requirements.
6.How does Aetrix verify that MAX328CPE+ is sourced from the original manufacturer or authorized distributors?
All MAX328CPE+ 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 MAX328CPE+ meets industry standards.
7.What is the process for return or replacement of MAX328CPE+?
All MAX328CPE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX328CPE+, 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 MAX328CPE+ part is unused and in its original packaging.
Return procedure for MAX328CPE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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