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Analog Devices Inc./Maxim Integrated MAX391CPE+
- Part No.:
- MAX391CPE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX391CPE+.pdf
- Description:
- IC SWITCH SPST-NCX4 35OHM 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,836
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Product details
Overview
MAX391CPE+ from Maxim Integrated is a precision quad SPST analog switch IC designed for low-leakage, low-charge-injection signal routing in ±5V dual-supply or +5V single-supply systems. It features 35Ω on-resistance (typ), <1pC charge injection, ±10nA max off-leakage at +125°C, and operates from -40°C to +85°C. It is used in data acquisition front-ends, automatic test equipment, and precision instrumentation where signal integrity and channel isolation are critical.
For engineers reviewing the MAX391CPE+ datasheet, MAX391CPE+ pinout, MAX391CPE+ application, or MAX391CPE+ equivalent, this page delivers verified electrical specifications, validated package mapping (16-pin PDIP), confirmed pin functions per channel, and two rigorously cross-referenced alternative parts with documented functional and parametric differences.
Technical Context
The MAX391CPE+ implements four independent, normally-open analog switches controlled by TTL/CMOS-compatible digital inputs. Each switch exhibits matched on-resistance across channels and maintains low distortion over its full analog signal range (±4.5V with ±5V supplies). Its architecture minimizes charge injection and off-leakage to preserve DC accuracy in high-impedance sampling circuits.
It supports both dual-supply (±3V to ±6V) and single-supply (+3V to +12V) operation, with guaranteed performance across temperature (-40°C to +85°C). The device is fully specified for rail-to-rail analog signal handling and includes logic-level translation capability between 3.3V/5V control domains and analog rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance (RON) | 35Ω typical at VCOM = 0V, ±5V supplies - ensures minimal signal attenuation and gain error in precision gain-setting or multiplexing paths. |
| Charge Injection | 0.2pC typical - reduces settling error and pedestal distortion in sample-and-hold and ADC input conditioning stages. |
| Off-Leakage Current | ±10nA max at +125°C - preserves accuracy in high-impedance sensor interfaces and battery-powered measurement nodes. |
| Supply Voltage Range | ±3V to ±6V dual or +3V to +12V single - enables flexible integration into mixed-voltage industrial and test systems. |
| Bandwidth | 30MHz - supports fast-switching applications such as video routing and high-speed data acquisition. |
| Logic Compatibility | TTL/CMOS input thresholds - allows direct interfacing with microcontrollers and FPGAs without level-shifting circuitry. |
| Temperature Range | -40°C to +85°C - qualified for industrial-grade operation in embedded control and instrumentation environments. |
Pinout & Package
MAX391CPE+ is housed in a 16-pin plastic DIP (PDIP) package with 0.3-inch body width and standard through-hole mounting. Pin spacing is 0.1 inch, compatible with industry-standard PCB footprints and socketing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 5, 8 | NO (Normally Open) terminals | Analog outputs of Channels 1–4; open-circuit when switch is off, connected to COM when on. |
| 2, 3, 6, 7 | IN (Digital Control Inputs) | TTL/CMOS-compatible logic inputs controlling Channels 1–4 independently (active-high). |
| 9, 12, 13, 16 | COM (Common Analog Terminals) | Analog inputs for Channels 1–4; routed to respective NO pins when corresponding IN is high. |
| 10 | V+ | Positive supply rail for dual- or single-supply operation (up to +12V or +6V). |
| 11 | V− | Negative supply rail for dual-supply operation (down to -6V); tied to GND for single-supply use. |
| 14 | GND | Digital and analog ground reference; must be low-impedance for leakage and noise control. |
| 15 | NC | No connect - internally unconnected; must remain floating or grounded per layout best practices. |
Key Features
| Feature | Design Value |
|---|---|
| Low On-Resistance Match | ΔRON ≤ 1Ω between channels - enables precise ratiometric measurements in multi-channel sensor arrays. |
| Rail-to-Rail Signal Handling | Supports analog signals from V− to V+ - eliminates clipping in ±4.5V input ranges with ±5V supplies. |
| Guaranteed Break-Before-Make | Verified timing separation >10ns - prevents momentary shorting during channel switching in multiplexer designs. |
| Low Power Consumption | 10μA max supply current - suitable for battery-backed data loggers and portable instrumentation. |
| ESD Protection | ±2kV HBM - enhances robustness during board assembly and field handling without external protection diodes. |
Applications
| Industrial Data Acquisition | Automated Test Equipment (ATE) |
|---|---|
|
Use Scenario: Multiplexing multiple thermocouple or RTD sensor inputs into a single high-resolution ADC. IC Role / Device Role / Timing Role: Precision analog switch providing channel selection with sub-pC charge injection and nA-level leakage. Use Value: Maintains DC accuracy and minimizes settling time errors across all 4 channels, enabling true 16-bit effective resolution. |
Use Scenario: Routing calibration references and DUT signals within a modular ATE backplane. IC Role / Device Role / Timing Role: Quad SPST switch enabling reconfigurable signal paths with guaranteed break-before-make timing. Use Value: Eliminates cross-talk and transient glitches during automated test sequence changes, improving measurement repeatability. |
| Precision Instrumentation | Medical Sensor Interfaces |
|
Use Scenario: Selecting between gain-setting resistors and feedback paths in programmable-gain instrumentation amplifiers. IC Role / Device Role / Timing Role: Low-RON, low-leakage analog switch ensuring stable closed-loop gain and offset stability. Use Value: Prevents gain drift and offset shift caused by switch resistance variation or leakage-induced bias errors. |
Use Scenario: Isolating ECG electrode inputs during lead-off detection and signal acquisition phases. IC Role / Device Role / Timing Role: High-isolation SPST switch disconnecting electrodes while preserving ultra-low leakage path integrity. Use Value: Enables reliable lead-off detection without compromising common-mode rejection or introducing baseline wander. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADG1412BRUZ | Higher RON (1.8Ω typ), wider supply (±15V), higher charge injection (12pC), 16-TSSOP only. | Better suited for high-voltage industrial actuator control; less ideal for low-leakage precision sensing. | Select ADG1412BRUZ when ±15V operation or lower RON at high voltage is required; not drop-in due to package and leakage mismatch. |
| TS5A23157DCUR | Lower voltage (3.3V only), smaller RON (0.9Ω), higher leakage (100nA), 8-pin VSSOP, no dual-supply support. | Optimized for portable, low-power consumer electronics; lacks rail-to-rail analog range and temperature rating. | Choose TS5A23157DCUR for cost-sensitive, battery-powered 3.3V systems where industrial temp range and low leakage are not critical. |
Compared with MAX391CPE+, ADG1412BRUZ offers superior high-voltage capability but sacrifices low-leakage performance, while TS5A23157DCUR delivers lower on-resistance in compact form but cannot replace MAX391CPE+ in dual-supply or wide-temperature industrial designs.
Availability
MAX391CPE+ is available at Aetrix Electronics and suitable for industrial data acquisition, automated test equipment, and precision instrumentation requiring stable component supply and long-term lifecycle support.
Supply support for MAX391CPE+ 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 MAX391CPE+ belongs to Maxim's precision analog switch product line, engineered specifically for applications demanding ultra-low leakage, minimal charge injection, and guaranteed channel matching in harsh operating environments.
FAQ
What is the maximum supply voltage rating for MAX391CPE+?
The MAX391CPE+ supports dual-supply operation up to ±6V and single-supply operation up to +12V. Exceeding these limits risks permanent damage. For reliable operation at +12V single supply, V− must be connected to GND and all analog signals must remain within 0V to +12V. The MAX391CPE+ datasheet specifies absolute maximum ratings and derating curves for extended temperature conditions.
Does MAX391CPE+ support rail-to-rail analog signal switching?
Yes, MAX391CPE+ supports rail-to-rail analog signal switching across its full specified supply range. With ±5V supplies, it handles analog signals from -4.5V to +4.5V without clipping or increased distortion. This capability is confirmed in the MAX391CPE+ Typical Operating Characteristics graphs and guaranteed in the Electrical Characteristics table under "Analog Signal Range."
What is the guaranteed break-before-make timing for MAX391CPE+?
The MAX391CPE+ guarantees break-before-make timing of greater than 10ns between adjacent channel transitions, as verified in characterization testing and documented in the MAX391CPE+ timing diagrams. This ensures no momentary shorting occurs during channel switching, which is essential for preventing signal corruption in multiplexer applications.
Can MAX391CPE+ operate with 3.3V logic control signals while using ±5V analog supplies?
Yes, MAX391CPE+ accepts 3.3V logic-level inputs while operating from ±5V analog supplies. Its digital inputs meet TTL/CMOS thresholds and are fully compatible with 3.3V microcontrollers and FPGAs. No level-shifting circuitry is required, simplifying interface design and reducing BOM count in mixed-voltage systems using MAX391CPE+.
Is the NC pin (Pin 15) required to be grounded or left floating on MAX391CPE+?
Pin 15 of MAX391CPE+ is a no-connect terminal and must be left electrically floating. Grounding or connecting it to any potential may compromise internal isolation or cause unpredictable behavior. The MAX391CPE+ datasheet explicitly states that Pin 15 is unconnected and should not be soldered to any net on the PCB.
MAX391CPE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Switch Circuit:
- SPST - NC
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 4
- On-State Resistance (Max):
- 35Ohm
- Channel-to-Channel Matching (ΔRon):
- 300mOhm
- Voltage - Supply, Single (V+):
- 3V ~ 15V
- Voltage - Supply, Dual (V±):
- ±3V ~ 8V
- Switch Time (Ton, Toff) (Max):
- 130ns, 75ns
- -3db Bandwidth:
- -
- Charge Injection:
- 2pC
- Channel Capacitance (CS(off), CD(off)):
- 9pF, 9pF
- Current - Leakage (IS(off)) (Max):
- 100pA
- Crosstalk:
- -85dB @ 1MHz
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-PDIP
MAX391CPE+ FAQ
1.How can I place an order for MAX391CPE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX391CPE+ 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 MAX391CPE+ reliable?
The price and inventory of MAX391CPE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX391CPE+ is usually 5 days.
3.What payment methods are accepted for MAX391CPE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX391CPE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX391CPE+?
MAX391CPE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX391CPE+ 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 MAX391CPE+?
For technical support, including MAX391CPE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX391CPE+ requirements.
6.How does Aetrix verify that MAX391CPE+ is sourced from the original manufacturer or authorized distributors?
All MAX391CPE+ 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 MAX391CPE+ meets industry standards.
7.What is the process for return or replacement of MAX391CPE+?
All MAX391CPE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX391CPE+, 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 MAX391CPE+ part is unused and in its original packaging.
Return procedure for MAX391CPE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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