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Analog Devices Inc./Maxim Integrated MAX328CPE+G002
- Part No.:
- MAX328CPE+G002
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- -
- Datasheet:
-
MAX328CPE+G002.pdf
- Description:
- INTEGRATED CIRCUIT
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Product details
Overview
MAX328CPE+G002 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 ±5V to ±18V dual-supply operation. It serves as a precision signal-routing switch in high-impedance data-acquisition front-ends, enabling fault-tolerant operation with external 40kΩ input resistors for indefinite 110V AC fault survival.
For engineers reviewing the MAX328CPE+G002 datasheet, MAX328CPE+G002 pinout, MAX328CPE+G002 application, or MAX328CPE+G002 equivalent, key selection criteria include leakage-critical channel switching, rail-to-rail analog signal range, TTL/CMOS logic compatibility, sub-1.5µs switching speed, and pin-for-pin replacement capability for DG508 and MAX358 in legacy designs.
Technical Context
The MAX328CPE+G002 implements a CMOS transmission-gate architecture with latchup-proof construction, supporting bidirectional analog signal flow between eight inputs (S1–S8) and one common output (D). Its address decoding uses three binary inputs (A0–A2) plus an active-high enable (EN) to select channels, with break-before-make timing of 0.2µs to prevent signal shorting during switching.
Designed for high-source-impedance environments, it maintains <1pA off-leakage across temperature and operates with unbalanced supplies (e.g., +12V/−5V). The device sustains 110V AC faults indefinitely when paired with 40kΩ series resistors, generating <40nV error voltage under normal signal conditions due to guaranteed low leakage and precise on-resistance matching.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Analog Signal Range | ±15V - supports rail-to-rail input signals with ±15V dual supplies, enabling full dynamic range utilization in precision measurement systems. |
| On-Resistance (RDS(ON)) | 2.5kΩ typ - ensures minimal gain error and settling time impact when driving high-input-impedance op amps or ADCs. |
| Off-Leakage Current | 1pA typ at +25°C - preserves signal integrity in high-impedance sensor interfaces and long-time-constant integrators. |
| Switching Time | 1.5µs max - enables fast channel scanning in multi-channel data loggers without compromising accuracy. |
| Supply Voltage Range | ±5V to ±18V - allows flexible system-level power architecture, including unbalanced rails like +12V/−5V. |
| Enable Turn-On/Off Time | tON(EN) = 1.5µs, tOFF(EN) = 1.0µs - supports synchronous control in time-critical routing applications. |
| Off-Isolation (OIRR) | 84dB at 500kHz - suppresses crosstalk between inactive channels in dense multiplexed signal paths. |
Pinout & Package
MAX328CPE+G002 is housed in a 16-pin plastic DIP (dual in-line package) with 0.3-inch body width and through-hole mounting. Pin 1 is located at the top-left corner adjacent to the notch or dot marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 4–7, 9–12, 14 | S1–S8 | Bidirectional analog inputs - eight independent signal sources selectable to common output D; each supports rail-to-rail voltage swing. |
| 2 | EN | Active-high enable - disables all switches when low, reducing leakage and power consumption in standby mode. |
| 8 | D | Bidirectional analog output - common node for selected input channel; connects to high-Z load (e.g., op amp input or ADC sample capacitor). |
| 13, 15, 16 | A0, A1, A2 | Binary address inputs - decode 000–111 to select S1–S8; compatible with TTL/CMOS logic thresholds (VAL ≤0.8V, VAH ≥2.4V). |
| 11 | V+ | Positive supply input - accepts +5V to +30V (single) or up to +18V (dual); must be ≥2V above highest analog signal. |
| 1 | V− | Negative supply input - accepts −5V to −30V (single) or down to −18V (dual); must be ≤2V below lowest analog signal. |
| 12 | GND | Logic ground reference - separate from analog signal ground; ties digital control logic to common reference plane. |
Key Features
| Feature | Design Value |
|---|---|
| Fault-tolerant architecture | With external 40kΩ resistors, withstands indefinite 110V AC faults while maintaining <40nV error - eliminates need for external protection diodes. |
| Rail-to-rail analog signal range | Operates with input signals extending to V+ and V− rails - maximizes dynamic range in ±15V systems without clipping. |
| Bidirectional signal path | Supports mux or demux operation - enables flexible signal routing in both directions without polarity constraints. |
| Pin compatibility with legacy parts | Direct drop-in replacement for DG508 and MAX358 - allows upgrade to lower leakage and higher fault tolerance without PCB redesign. |
| Latchup-proof CMOS process | Immune to destructive latchup under overvoltage or ESD stress - enhances reliability in industrial and avionics environments. |
Applications
| High-Voltage Data Acquisition | Fault-Tolerant Sensor Multiplexing |
|---|---|
|
Use Scenario: Multi-sensor monitoring in industrial PLCs where 110V AC line faults may couple into analog input channels. IC Role / Device Role / Timing Role: Analog multiplexer routing eight thermocouple or RTD signals to a shared precision ADC, with EN-controlled channel sequencing. Use Value: Enables indefinite fault survival using only 40kΩ resistors - avoids costly transient voltage suppressors and board-level isolation. |
Use Scenario: Aircraft heads-up display (HUD) systems requiring uninterrupted analog video signal routing despite EMI-induced transients. IC Role / Device Role / Timing Role: Fault-resilient signal selector switching between redundant video sources to a display driver, operating from ±15V supplies. Use Value: Maintains <40nV error under fault conditions - preserves 16-bit+ resolution in critical flight instrumentation. |
| Portable Precision Instrumentation | Legacy System Upgrade |
|
Use Scenario: Battery-powered handheld multimeter with auto-ranging analog front-end and multi-channel sensor support. IC Role / Device Role / Timing Role: Low-power analog switch selecting between voltage, current, and resistance measurement paths before conditioning circuitry. Use Value: 1.9mW power dissipation at ±15V enables extended battery life; 1pA leakage prevents drift in microamp-level measurements. |
Use Scenario: Retrofitting aging test equipment originally using DG508 multiplexers to meet modern leakage and fault-tolerance requirements. IC Role / Device Role / Timing Role: Pin-compatible drop-in replacement providing identical logic interface and timing while improving off-isolation by 20dB. Use Value: Zero PCB changes required; achieves 84dB off-isolation vs. DG508's ~64dB - reduces crosstalk in high-density signal routing. |
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 (10nA typ), 100Ω higher RDS(ON), no built-in fault tolerance - requires external diodes for 110V AC protection. | Legacy industrial designs where leakage >10pA is acceptable and fault exposure is mitigated externally. | Select DG508ACJ+ only if cost sensitivity outweighs leakage and fault-protection requirements; not suitable for new designs targeting 17-bit resolution. |
| MAX358CPE+ | Same pinout and function as MAX328 but rated for −40°C to +85°C (E-grade); otherwise identical electrical specs and fault-tolerance capability. | Extended-temperature applications such as automotive engine control units or outdoor environmental sensors. | Choose MAX358CPE+ when operating beyond 0°C to +70°C range; MAX328CPE+G002 remains optimal for commercial-temperature cost-sensitive deployments. |
Compared with DG508ACJ+, MAX328CPE+G002 delivers 10,000× lower off-leakage and integrated fault tolerance without external components; versus MAX358CPE+, it offers identical performance at lower cost for 0°C to +70°C applications, making it the preferred choice for commercial instrumentation and data loggers.
Availability
MAX328CPE+G002 is available at Aetrix Electronics and suitable for high-voltage data acquisition, fault-tolerant sensor multiplexing, and portable precision instrumentation requiring stable component supply and long-term obsolescence management.
Supply support for MAX328CPE+G002 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 precision analog, mixed-signal, and power management ICs for industrial, medical, and communications systems.
The MAX328CPE+G002 belongs to Maxim's ultra-low-leakage analog multiplexer product line, engineered specifically for high-impedance signal routing in fault-prone environments where leakage-induced errors and transient survivability are critical design constraints.
FAQ
What is the maximum continuous analog signal voltage range supported by the MAX328CPE+G002?
The MAX328CPE+G002 supports an analog signal range of ±15V when operated with ±15V supplies. This rail-to-rail capability means input signals can extend from V− to V+ without clipping, provided the supply voltages meet the ±5V to ±18V specification. The device also functions with single supplies from 10V to 30V, scaling the usable analog range accordingly.
How does the MAX328CPE+G002 achieve fault tolerance against 110V AC line faults?
The MAX328CPE+G002 achieves fault tolerance by combining ultra-low leakage (<1pA) with external 40kΩ resistors placed in series with each analog input. Under a 110V AC fault, the resistor limits current, while the internal CMOS structure sustains the voltage indefinitely. The resulting error voltage stays below 40nV (1pA × 40kΩ), preserving signal fidelity without requiring external diodes or clamps.
Is the MAX328CPE+G002 pin-compatible with the DG508 multiplexer?
Yes, the MAX328CPE+G002 is explicitly designed as a pin-for-pin replacement for the DG508 in standard DIP packages. Both devices share identical pin assignments for address inputs (A0–A2), enable (EN), analog inputs (S1–S8), output (D), power (V+, V−), and ground (GND), allowing direct substitution without layout changes or firmware updates.
What is the typical on-resistance mismatch between channels in the MAX328CPE+G002?
The MAX328CPE+G002 guarantees a maximum on-resistance mismatch of 2% between channels, calculated as (RDS(ON)max − RDS(ON)min) / RDS(ON)ave. This tight matching ensures consistent gain and settling behavior across all eight channels, critical for multi-channel calibration and ratiometric measurement accuracy.
Can the MAX328CPE+G002 operate with unbalanced supply voltages such as +12V and −5V?
Yes, the MAX328CPE+G002 is fully specified to operate with unbalanced supply combinations including +12V/−5V and +5V/−15V. Its design accommodates asymmetric rails as long as each supply remains within the ±5V to ±18V absolute range and the total V+–V− differential does not exceed 36V, ensuring robust performance in mixed-voltage systems.
MAX328CPE+G002 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Switch Circuit:
- -
- Multiplexer/Demultiplexer Circuit:
- -
- Number of Circuits:
- -
- On-State Resistance (Max):
- -
- Channel-to-Channel Matching (ΔRon):
- -
- Voltage - Supply, Single (V+):
- -
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- -
- -3db Bandwidth:
- -
- Charge Injection:
- -
- Channel Capacitance (CS(off), CD(off)):
- -
- Current - Leakage (IS(off)) (Max):
- -
- Crosstalk:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX328CPE+G002 FAQ
1.How can I place an order for MAX328CPE+G002 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX328CPE+G002 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+G002 reliable?
The price and inventory of MAX328CPE+G002 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX328CPE+G002 is usually 5 days.
3.What payment methods are accepted for MAX328CPE+G002?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX328CPE+G002 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX328CPE+G002?
MAX328CPE+G002 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX328CPE+G002 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+G002?
For technical support, including MAX328CPE+G002 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX328CPE+G002 requirements.
6.How does Aetrix verify that MAX328CPE+G002 is sourced from the original manufacturer or authorized distributors?
All MAX328CPE+G002 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+G002 meets industry standards.
7.What is the process for return or replacement of MAX328CPE+G002?
All MAX328CPE+G002 units undergo pre-shipment inspection (PSI). If there is an issue with MAX328CPE+G002, 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+G002 part is unused and in its original packaging.
Return procedure for MAX328CPE+G002:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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