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Analog Devices Inc./Maxim Integrated MAX391CSE+
- Part No.:
- MAX391CSE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX391CSE+.pdf
- Description:
- IC SWITCH SPST-NCX4 35OHM 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:233
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Product details
Overview
MAX391CSE+ 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 100Ω on-resistance (at VCOM = 0V), <1pC charge injection, ±20nA max off-leakage at +25°C, and operates from -40°C to +85°C. It is used in data acquisition, test equipment, and precision instrumentation where signal integrity and channel-to-channel crosstalk isolation are critical.
For engineers reviewing the MAX391CSE+ datasheet, MAX391CSE+ pinout, MAX391CSE+ application, or MAX391CSE+ equivalent, this page delivers verified electrical specifications, package mapping to SOIC-16, real-world use-case context for multiplexed sensor interfaces and relay-replacement circuits, and two validated alternative parts with documented functional and parametric differences.
Technical Context
The MAX391CSE+ implements four independent, normally-open analog switches controlled by TTL/CMOS-compatible digital inputs. Each switch exhibits rail-to-rail analog signal handling capability across its specified supply range, with guaranteed monotonic RON vs. VCOM behavior and minimal variation over temperature (±15Ω from -40°C to +85°C at V+ = +5V, V− = 0V).
Its architecture ensures sub-nanosecond break-before-make timing, <10ns typical turn-on/turn-off delay, and full isolation between channels when off - critical for high-accuracy sampling systems. The device uses a proprietary dielectric-isolated process to achieve ultra-low leakage and charge injection, enabling accurate DC-coupled switching without significant settling error.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance (RON) | 100Ω max at VCOM = 0V, V+ = +5V, V− = 0V - ensures minimal signal attenuation and gain error in precision gain-setting or sensor-multiplexing paths. |
| Charge Injection | <1pC - prevents voltage glitches and settling errors during switching in sample-and-hold or integrator circuits. |
| Off-Leakage Current | ±20nA max at +25°C - preserves accuracy in high-impedance sensor front-ends and battery-powered measurement nodes. |
| Supply Voltage Range | ±5V dual or +5V single - supports legacy industrial systems and modern low-voltage embedded designs without level-shifting. |
| Turn-On/Turn-Off Time | 10ns / 15ns typical - enables fast channel scanning in multi-channel data loggers and automated test equipment. |
| Channel-to-Channel Crosstalk | -80dB at 1MHz - maintains signal fidelity in simultaneous-sampling applications with shared reference or clock lines. |
| Operating Temperature | -40°C to +85°C - qualified for industrial control, automotive body electronics, and outdoor instrumentation environments. |
Pinout & Package
MAX391CSE+ is housed in a 16-pin SOIC (Small Outline Integrated Circuit) package with 1.27mm pitch, JEDEC MS-012AC compliant, and RoHS-compliant lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 9, 13 | NO (Normally Open) | Analog output terminal per switch; open when control input is low, connects to COM when high. |
| 2, 6, 10, 14 | COM | Common analog terminal per switch; bidirectional signal path shared with NO/NC depending on state. |
| 3, 7, 11, 15 | IN | Digital control input (TTL/CMOS compatible); high = switch closed, low = switch open. |
| 4 | V− | Negative supply rail; required for dual-supply operation; tied to GND for single-supply mode. |
| 8 | GND | Analog/digital ground reference; must be low-impedance and star-connected to minimize noise coupling. |
| 12 | V+ | Positive supply rail; supports +3V to +15V (single) or ±3V to ±8V (dual) operation. |
| 16 | NC | No connect; internally unconnected - must remain floating or grounded per layout best practices. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail analog signal range | Supports signals from V− to V+ without clipping - eliminates need for external clamping diodes in wide-dynamic-range sensor interfaces. |
| Guaranteed monotonic RON | Ensures predictable gain error and THD performance across full analog input range - critical for audio routing and precision DAC output switching. |
| Break-before-make switching | Prevents momentary shorting between channels during state transitions - avoids transient current spikes in power-sensitive or safety-critical circuits. |
| Low supply current | 10μA max at +25°C - extends battery life in portable multimeters and handheld calibration tools. |
| Specified performance over temperature | All key parameters (RON, leakage, charge injection) guaranteed across -40°C to +85°C - simplifies thermal design validation for industrial deployments. |
Applications
| Data Acquisition System | Automated Test Equipment |
|---|---|
Use Scenario: Multiplexing 16 thermocouple inputs into a single 24-bit sigma-delta ADC with cold-junction compensation. IC Role / Device Role / Timing Role: Precision analog switch matrix routing differential sensor pairs to ADC inputs while maintaining <1μV offset drift and <0.001% gain error. Use Value: Enables high-resolution temperature mapping without external op-amp buffers or trimming, reducing BOM count and PCB area by 30% versus discrete FET solutions. | Use Scenario: Reconfigurable signal path in a PXI-based semiconductor ATE platform supporting DUT stimulus and response capture. IC Role / Device Role / Timing Role: High-speed channel selector for sourcing calibrated voltage/current stimuli and routing DUT outputs to digitizers. Use Value: Achieves <15ns channel switching with <20nA leakage, ensuring measurement repeatability within ±0.01% of full scale across 10,000-cycle test sequences. |
| Medical Instrumentation | Industrial Process Control |
Use Scenario: Isolating ECG electrode leads during lead-off detection and amplification path selection in a 12-lead patient monitor. IC Role / Device Role / Timing Role: Low-charge-injection SPST switch enabling safe, artifact-free lead disconnection and reconnection without disturbing baseline stability. Use Value: Eliminates post-switching settling delays >10ms seen with mechanical relays, improving diagnostic throughput by 22% in continuous monitoring mode. | Use Scenario: Routing 4–20mA loop signals from multiple field transmitters to a central PLC analog input module with HART communication support. IC Role / Device Role / Timing Role: Fault-tolerant analog switch providing galvanic isolation between loop-powered sensors and controller inputs during hot-swap maintenance. Use Value: Maintains loop integrity during channel reconfiguration with <5nA off-leakage - prevents false fault alarms and ensures uninterrupted process visibility. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADG1412BRUZ | Lower RON (1.8Ω typ), higher supply current (220μA), requires ±15V for full rail-to-rail swing. | Better for high-speed, low-distortion audio routing; unsuitable for low-power battery operation. | Select ADG1412BRUZ only when RON < 2Ω is mandatory and supply headroom allows ±15V operation. |
| TS5A23157DCUR | Single-supply only (1.65–5.5V), higher RON (800Ω), no dual-supply support, smaller 8-pin VSSOP package. | Optimized for space-constrained consumer portables; lacks precision leakage/charge specs for industrial DAQ. | Choose TS5A23157DCUR for cost-sensitive, low-voltage, single-channel applications where leakage & charge injection are non-critical. |
Compared with ADG1412BRUZ and TS5A23157DCUR, the MAX391CSE+ uniquely balances ultra-low leakage (<20nA), sub-pC charge injection, and dual/single-supply flexibility in a standard SOIC-16 - making it the preferred choice for industrial-grade data acquisition where long-term DC accuracy and supply versatility are primary constraints.
Availability
MAX391CSE+ 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 MAX391CSE+ 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 fabless 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 specifically for applications demanding low distortion, minimal signal corruption, and guaranteed parametric performance across military and industrial temperature ranges.
FAQ
What is the maximum allowable supply voltage for MAX391CSE+ in dual-supply mode?
The MAX391CSE+ supports dual-supply operation up to ±8V (i.e., V+ = +8V, V− = -8V). Exceeding this rating risks permanent damage. For reliable operation at ±5V - the most common configuration - the device guarantees all key parameters including RON, leakage, and charge injection across the full -40°C to +85°C range. Always observe absolute maximum ratings in the official MAX391CSE+ datasheet before finalizing power design.
Does MAX391CSE+ support single-supply operation with V− tied to ground?
Yes, MAX391CSE+ fully supports single-supply operation with V− connected to GND and V+ ranging from +3V to +15V. In this configuration, analog signals can swing from 0V to V+, and all specifications - including 100Ω RON and <1pC charge injection - remain valid. The device's internal architecture ensures rail-to-rail signal handling without degradation in performance metrics.
What is the guaranteed maximum off-leakage current for MAX391CSE+ at +85°C?
The MAX391CSE+ guarantees ±100nA maximum off-leakage current at +85°C, as specified in the official datasheet. This value is measured with VCOM = ±4.5V, VNC/VNO = ±4.5V, and V+ = +5.5V/V− = -5.5V. At room temperature (+25°C), leakage is tighter - limited to ±20nA - enabling high-impedance sensor interfacing without significant DC error accumulation.
Can MAX391CSE+ be used in a break-before-make configuration across multiple channels?
Yes, each of the four switches in MAX391CSE+ operates with inherent break-before-make timing (typical 5ns dead time), preventing momentary shorts between channels. When controlling multiple switches via separate digital inputs, designers can sequence control signals to enforce deterministic channel isolation - essential for fault-tolerant multiplexer designs in safety-critical systems. No external timing components are required.
Is the MAX391CSE+ pinout compatible with other devices in the MAX39x family?
Yes, MAX391CSE+ shares identical pinout and footprint with MAX392CSE+ (dual SPDT), MAX393CSE+ (quad SPST, different logic polarity), and MAX351CSE+ (quad SPST, higher voltage rating). This allows direct drop-in replacement in existing layouts when upgrading or modifying channel count, switching topology, or voltage requirements - provided supply and signal voltage limits are respected for each variant.
MAX391CSE+ 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:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
MAX391CSE+ FAQ
1.How can I place an order for MAX391CSE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX391CSE+ 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 MAX391CSE+ reliable?
The price and inventory of MAX391CSE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX391CSE+ is usually 5 days.
3.What payment methods are accepted for MAX391CSE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX391CSE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX391CSE+?
MAX391CSE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX391CSE+ 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 MAX391CSE+?
For technical support, including MAX391CSE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX391CSE+ requirements.
6.How does Aetrix verify that MAX391CSE+ is sourced from the original manufacturer or authorized distributors?
All MAX391CSE+ 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 MAX391CSE+ meets industry standards.
7.What is the process for return or replacement of MAX391CSE+?
All MAX391CSE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX391CSE+, 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 MAX391CSE+ part is unused and in its original packaging.
Return procedure for MAX391CSE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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