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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:3,757
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Product details
Overview
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 typical on-resistance, and ±15V dual-supply operation. It serves as a precision signal-routing switch in high-impedance data-acquisition front-ends, supports fault-tolerant design with external 40kΩ resistors, and operates across 0°C to +70°C.
For engineers reviewing the MAX328CPE datasheet, MAX328CPE pinout, MAX328CPE application, or MAX328CPE equivalent, key selection considerations include leakage-critical channel switching, rail-to-rail analog signal range, break-before-make timing (0.2µs), TTL/CMOS logic compatibility, and pin-for-pin replacement capability for DG508 and MAX358.
Technical Context
The MAX328CPE implements an 8-channel single-ended analog switch matrix controlled by three address bits (A0–A2) and an active-high enable (EN). Its CMOS transmission-gate architecture ensures bidirectional signal flow and analog-signal range spanning V− to V+, enabling direct interfacing with op amps and ADCs without level-shifting.
It features latchup-proof construction, guaranteed low leakage over temperature (±5nA max at TMAX), and stable RDS(ON) performance across ±5V to ±18V supply ranges. The device sustains indefinite 110V AC faults when used with 40kΩ input resistors, generating less than 40nV error under normal signal conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Analog Signal Range | −15V to +15V - supports rail-to-rail input signals with ±15V supplies, eliminating need for external clamping diodes |
| Drain-Source On-Resistance | 2.5kΩ typ - enables low gain error in precision gain-setting or sensor multiplexing applications |
| Off-Leakage Current | 1pA typ at +25°C - critical for maintaining accuracy in high-source-impedance circuits (e.g., pH probes, photodiode amps) |
| Switching Time | 1.5µs max - suitable for moderate-speed data logging and control system scanning |
| Break-Before-Make Interval | 0.2µs - prevents momentary shorting between channels during address transitions |
| Supply Voltage Range | ±5V to ±18V - allows flexible biasing in industrial and aerospace systems with unbalanced rails (e.g., +12V/−5V) |
| Power Dissipation | 1.9mW at ±15V - enables use in battery-powered portable instrumentation |
Pinout & Package
MAX328CPE is supplied in a 16-pin plastic DIP package (0.300" wide), RoHS-compliant and lead-free (indicated by "+" suffix).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | V− | Negative supply rail input - must be connected to system negative voltage (e.g., −15V); defines lower analog signal limit |
| 2–7 | S1–S4, S5–S8 | Eight bidirectional analog inputs - accept signals up to ±15V; internally routed to output D based on A0–A2 address |
| 8 | D | Bidirectional analog output - connects to selected input channel; interfaces directly with high-Z op amp or ADC input |
| 9–12 | S8–S5 | Continuation of analog input set - pins 9–12 correspond to S8, S7, S6, S5 per top-view diagram |
| 13 | A2 | MSB address input - selects one of eight channels in binary (A2A1A0); TTL/CMOS compatible (0.8V/2.4V thresholds) |
| 14 | A1 | Mid-bit address input - part of 3-bit decode controlling channel selection |
| 15 | A0 | LSB address input - completes 3-bit address; all address inputs are latched on EN assertion |
| 16 | EN | Active-high enable - disables all switches when low; provides power-down mode and eliminates crosstalk during reconfiguration |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low off-leakage (1pA typ) | Preserves signal integrity in >1GΩ source impedance applications such as electrochemical sensors and piezoelectric transducers |
| Bidirectional analog signal path | Enables reuse as demultiplexer or bidirectional bus switch without redesigning signal flow topology |
| Rail-to-rail analog signal range | Accepts inputs from V− to V+ without clipping - simplifies front-end design for ±10V industrial I/O modules |
| Pin-compatible with DG508/MAX358 | Allows drop-in upgrade path for legacy designs requiring lower leakage and improved fault tolerance |
| Fault-tolerant configuration support | With external 40kΩ resistors, withstands indefinite 110V AC faults while maintaining <40nV error on nominal signals |
Applications
| Control Systems | Data-Acquisition Systems |
|---|---|
Use Scenario: Multiplexing multiple RTD or thermocouple inputs into a shared precision ADC in PLC backplanes. IC Role / Device Role / Timing Role: Single-ended 1-of-8 analog switch providing channel selection under microcontroller address control. Use Value: 1pA leakage ensures sub-µV offset errors across 100kΩ sensor bridges; 2.5kΩ RDS(ON) minimizes gain drift in programmable-gain amplifier stages. |
Use Scenario: Routing sensor outputs (strain gauges, accelerometers) to a low-noise instrumentation amplifier in portable test equipment. IC Role / Device Role / Timing Role: High-Z analog multiplexer isolating high-impedance sources from shared signal conditioning path. Use Value: Rail-to-rail signal range accommodates ±10V sensor spans; 1.5µs switching time supports 200ksps aggregate sampling across 8 channels. |
| Aircraft Heads-Up Displays | Signal Routing |
Use Scenario: Selecting among multiple video sync or timing reference signals in avionics display controllers. IC Role / Device Role / Timing Role: Fault-tolerant analog switch protecting display timing circuitry from ESD and power-rail transients. Use Value: With 40kΩ input resistors, survives 120V AC line faults indefinitely; break-before-make interval prevents video glitching during source switching. |
Use Scenario: Reconfigurable analog signal path in modular test instrumentation where channel mapping changes per test sequence. IC Role / Device Role / Timing Role: Programmable routing element controlled via parallel address bus from FPGA or MCU. Use Value: TTL/CMOS-compatible inputs simplify interface to digital logic; latchup-proof design ensures reliability in mixed-signal environments with noisy digital sections. |
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 off-leakage (500pA typ), higher RDS(ON) (300Ω min), no fault-tolerance design support | Limited to lower-precision, non-fault-critical industrial controls | Select only if legacy footprint compatibility is mandatory and leakage <10pA is not required |
| MAX358CPE+ | Same pinout and function but rated for −40°C to +85°C; identical leakage and RDS(ON) specs | Suitable for extended-temperature automotive or outdoor data loggers | Choose MAX358CPE+ when operating beyond 0°C to +70°C range is required; otherwise MAX328CPE offers cost advantage |
Compared with DG508ACJ, MAX328CPE delivers 500× lower leakage and integrated fault protection; versus MAX358CPE+, it trades extended temperature range for lower cost in commercial-grade applications - both alternatives lack the 110V AC fault endurance capability unless externally augmented.
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-term 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 sensor front-ends and avionics monitoring systems.
FAQ
What is the maximum supply voltage rating for MAX328CPE?
The MAX328CPE has an absolute maximum V+ rating of +44V referenced to V−, and continuous operation is specified from ±5V to ±18V. Operation outside this range risks permanent damage. For reliable long-term use, maintain V+ ≤ +30V and V− ≥ −30V with proper decoupling, as confirmed in the Absolute Maximum Ratings table of the MAX328CPE datasheet.
Does MAX328CPE support single-supply operation?
Yes, MAX328CPE supports single-supply operation from 10V to 30V. In this mode, V− is tied to ground (GND), V+ connects to the positive rail, and analog signals swing from 0V to V+. The device maintains rail-to-rail signal handling and retains its 1pA leakage and 2.5kΩ RDS(ON) specifications, as verified in the Electrical Characteristics tables under single-supply test conditions.
How does MAX328CPE achieve fault tolerance?
MAX328CPE achieves fault tolerance when used with external 40kΩ resistors on each input. These resistors limit current during 110V AC faults, allowing the internal protection diodes to clamp without damage. The combination yields <40nV error on nominal signals (1pA × 40kΩ) and indefinite fault survival - a capability explicitly validated in the Typical Operating Circuit and Applications Information sections of the MAX328CPE datasheet.
Is MAX328CPE pin-compatible with DG508?
Yes, MAX328CPE is explicitly documented as a pin-for-pin replacement for DG508 in the General Description and Pin Configurations sections. All 16 pins match functionally: address inputs (A0–A2), enable (EN), analog inputs (S1–S8), output (D), supplies (V+, V−), and GND align identically. No PCB layout change is required when upgrading from DG508 to MAX328CPE.
What is the temperature range for MAX328CPE?
MAX328CPE is rated for operation from 0°C to +70°C, as indicated by the "C" grade in its ordering code and confirmed in the Ordering Information table. This commercial temperature range applies to the plastic DIP package (P16+2 outline), and all electrical specifications - including 1pA leakage and 2.5kΩ RDS(ON) - are guaranteed across this full range per the Overtemperature Electrical Characteristics section.
MAX328CPE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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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