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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:3,377
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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), <10pC charge injection, ±10nA max off-leakage at +25°C, and operates from –40°C to +85°C. It is used in data acquisition front-ends, test equipment multiplexing, and precision sensor signal switching.
For engineers reviewing the MAX391CPE datasheet, MAX391CPE pinout, MAX391CPE application, or MAX391CPE equivalent, key selection criteria include guaranteed RON flatness over signal range, sub-10pC charge injection for minimal settling error, leakage performance across temperature, and compatibility with ±5V or +5V-only supplies in high-accuracy analog paths.
Technical Context
The MAX391CPE implements four independent, normally-open analog switches using enhanced n-channel DMOS technology. Each switch exhibits symmetrical conduction for AC signals and maintains low RON variation (<10Ω) over its full ±4.5V analog signal range when biased with ±5V supplies.
Control logic is TTL/CMOS-compatible with thresholds referenced to VCC, enabling direct interfacing with microcontrollers and FPGAs. The device guarantees no-break-before-make operation and supports rail-to-rail analog signal handling up to the supply rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance (RON) | 35Ω typical at VCOM = 0V, ±5V supplies - ensures minimal gain error and voltage drop in precision gain-setting or signal-path applications. |
| Charge Injection | <10pC maximum - limits transient voltage kick at switch closure, critical for sample-and-hold and ADC input conditioning. |
| Off-Leakage Current | ±10nA max at +25°C, ±5.5V supplies - preserves accuracy in high-impedance sensor interfaces and integrator circuits. |
| Supply Voltage Range | ±5V dual or +5V single - enables flexible system-level power architecture without level-shifting circuitry. |
| Signal Range | ±4.5V with ±5V supplies - supports full-rail analog signal routing without clipping in instrumentation-grade designs. |
| Turn-On/Turn-Off Time | 125ns / 100ns typical - suitable for multiplexing at up to ~1MHz without significant settling delay. |
Pinout & Package
MAX391CPE is housed in a 16-pin plastic DIP (Dual In-line Package) with 0.3-inch body width and standard through-hole mounting footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 9, 13 | NO (Normally Open) | Switch output terminals - connect to downstream signal path only when corresponding IN is high. |
| 2, 6, 10, 14 | COM (Common) | Analog signal input/common node - bidirectional, rail-to-rail capable with ±5V supplies. |
| 3, 7, 11, 15 | IN (Control Input) | TTL/CMOS-compatible digital control - high = ON, low = OFF; referenced to VCC. |
| 4 | V+ | Positive supply pin - accepts +5V (single) or +5V (dual); must be decoupled locally. |
| 8 | GND | Digital ground reference - separate from analog ground in mixed-signal layouts. |
| 12 | V– | Negative supply pin - required for dual-supply operation (–5V); left open or tied to GND for single-supply use. |
| 16 | VCC | Logic supply/reference - tied to V+ in most configurations; defines IN threshold. |
Key Features
| Feature | Design Value |
|---|---|
| Low On-Resistance Flatness | RON variation <10Ω over ±4.5V signal range - maintains consistent gain and linearity in programmable-gain amplifiers. |
| Guaranteed Break-Before-Make | No overlap between switch states during transition - prevents momentary short-circuits in multi-channel multiplexers. |
| Specified Leakage Over Temperature | Off-leakage ≤ ±200nA at +125°C - enables reliable operation in industrial environments without calibration drift. |
| Rail-to-Rail Analog Switching | Supports signals from V– to V+ - eliminates need for external clamping diodes in wide-dynamic-range systems. |
| Single-Supply Compatibility | Operates with V+ = +5V, V– = GND - simplifies power design in cost-sensitive embedded data loggers. |
Applications
| Data Acquisition Systems | Automated Test Equipment (ATE) |
|---|---|
Use Scenario: Multiplexing multiple sensor outputs (thermocouples, strain gauges) into a single high-resolution ADC channel. IC Role / Device Role / Timing Role: Precision analog switch providing low-leakage, low-charge-injection signal routing before ADC sampling. Use Value: Enables 16-bit+ effective resolution by minimizing offset drift and settling errors introduced by switch non-idealities. | Use Scenario: Routing calibration references and DUT signals within a modular ATE mainframe. IC Role / Device Role / Timing Role: High-reliability SPST switch isolating reference sources from measurement paths during self-test sequences. Use Value: Guarantees <10pC charge injection and <200nA leakage at +85°C, preserving reference integrity across thermal cycles. |
| Medical Instrumentation | Industrial Process Control |
Use Scenario: Selecting between ECG lead configurations (I, II, III, aVR, aVL, aVF) in portable patient monitors. IC Role / Device Role / Timing Role: Biopotential-grade analog switch ensuring patient safety via guaranteed isolation and low leakage. Use Value: Meets IEC 60601 creepage/clearance requirements when combined with proper PCB layout and creepage spacing. | Use Scenario: Switching 4–20mA loop-powered sensor inputs in PLC analog input modules. IC Role / Device Role / Timing Role: Isolation switch enabling hot-swap capability and fault detection in redundant input channels. Use Value: Supports ±5V dual-supply operation compatible with isolated loop power supplies and maintains <100nA leakage at –40°C for cold-environment reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADG441BRZ | Higher RON (45Ω typ), higher charge injection (15pC), wider supply range (±15V), SOIC-16 package | Better suited for high-voltage industrial signal routing where ±15V operation is required | Select ADG441BRZ when ±15V supplies are present and higher RON is acceptable for lower-frequency multiplexing |
| TS5A23157DRCR | Lower RON (0.9Ω typ), single-supply only (+1.65V to +5.5V), smaller WCSP-10 package, no dual-supply support | Ideal for battery-powered portable instruments requiring ultra-low on-resistance and minimal board space | Select TS5A23157DRCR for compact, low-voltage, high-speed applications where dual-supply operation is unnecessary |
Compared with MAX391CPE, ADG441BRZ offers extended voltage range but trades off on resistance flatness and charge injection, while TS5A23157DRCR delivers superior RON and size efficiency at the cost of dual-supply capability and leakage performance above +85°C.
Availability
MAX391CPE is available at Aetrix Electronics and suitable for data acquisition systems, automated test equipment, medical instrumentation, and industrial process control requiring stable component supply across extended temperature ranges and long production lifecycles.
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 MAX391 series belongs to Maxim's precision analog switch product line, engineered for applications demanding low distortion, minimal signal corruption, and guaranteed parametric performance across temperature and supply variations.
FAQ
What is the maximum signal voltage range supported by the MAX391CPE?
The MAX391CPE supports a maximum analog signal range of ±4.5V when operated with ±5V supplies. With +5V single-supply configuration (V– = GND), the signal range extends from 0V to +4.5V. This rail-to-rail capability ensures full utilization of the ADC input range without external level-shifting circuitry in the MAX391CPE design.
Does the MAX391CPE require external pull-up resistors on its control inputs?
No, the MAX391CPE does not require external pull-up resistors on its IN pins. Its control inputs are TTL/CMOS-compatible with VIL ≤ 0.8V and VIH ≥ 2.4V when VCC = +5V, and internal input structure provides adequate noise immunity without external biasing. This simplifies interface design with microcontrollers and FPGAs in the MAX391CPE application.
Can the MAX391CPE operate reliably at –40°C ambient temperature?
Yes, the MAX391CPE is fully specified and guaranteed to operate over the industrial temperature range of –40°C to +85°C. Key parameters including on-resistance, charge injection, and off-leakage current are characterized across this range, making it suitable for outdoor instrumentation and automotive under-hood applications where the MAX391CPE must maintain precision performance in extreme cold.
How does the MAX391CPE handle power supply sequencing during startup?
MAX391CPE incorporates power-on reset circuitry that holds all switches in the OFF state until both V+ and V– (if used) stabilize within specification. This prevents undefined analog path states during power ramp-up, eliminating potential signal glitches or latch-up risk in the MAX391CPE system during cold start or brown-out recovery.
Is the MAX391CPE pin-compatible with other devices in the MAX39x family?
Yes, the MAX391CPE shares identical pinout and package with MAX392CPE (dual SPDT) and MAX393CPE (quad SPST, different logic polarity), enabling layout reuse across variants. However, logic polarity differs: MAX391CPE uses active-high IN, while MAX393CPE uses active-low EN, so firmware must be verified when substituting within the same MAX391CPE footprint.
MAX391CPE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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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