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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:2,032
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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 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, test equipment multiplexing, and precision sensor signal conditioning.
For engineers reviewing the MAX391CSE datasheet, MAX391CSE pinout, MAX391CSE application, or MAX391CSE equivalent, key selection criteria include guaranteed RON flatness over signal range, sub-pC charge injection for minimal settling error, ultra-low leakage across temperature, rail-to-rail analog signal handling, and SOIC-16 package compatibility with legacy layouts.
Technical Context
The MAX391CSE implements four independent single-pole single-throw (SPST) switches using enhancement-mode p-channel and n-channel MOSFETs in a complementary configuration. Its architecture ensures symmetrical on-resistance and matched channel characteristics across all four switches, enabling precise differential signal switching without gain mismatch.
It supports both dual-supply (±3V to ±20V) and single-supply (10V to 40V) operation, with logic-compatible control inputs referenced to VSS. The device guarantees monotonic RON vs. VCOM behavior and maintains <0.5Ω RON flatness over ±4.5V signal swing at ±5V supplies - critical for high-fidelity instrumentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance (RON) | 35Ω typical at ±5V supplies - enables <0.01% gain error in 1kΩ source/load impedance applications |
| Charge Injection | 0.2pC typical - limits voltage glitch to <200µV on 1nF sampling capacitor |
| Off-Leakage Current | ±10nA max at +125°C - preserves >16-bit accuracy in high-impedance sensor interfaces |
| Supply Range | ±3V to ±20V dual or +10V to +40V single - supports industrial ±15V and automotive 24V systems |
| Bandwidth | 200MHz - sufficient for 50MHz analog signal routing without attenuation |
| Logic Compatibility | CMOS/TTL input thresholds - interfaces directly with microcontroller GPIO without level-shifting |
| Temperature Range | -40°C to +85°C - qualified for industrial and extended commercial environments |
Pinout & Package
MAX391CSE is housed in a 16-pin SOIC (Small Outline Integrated Circuit) package with standard 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) | Switch output terminals - connect to load; open when IN = LOW |
| 2, 6, 10, 14 | COM (Common) | Analog signal path common node - connects to source or signal chain |
| 3, 7, 11, 15 | IN (Control Input) | Active-high digital control - HIGH closes switch (COM→NO) |
| 4 | V+ | Positive supply rail - must be ≥|V−| for proper biasing of internal FETs |
| 16 | V− | Negative supply rail - required for dual-supply operation; tied to GND for single-supply |
| 8 | GND | Digital ground reference - separate from analog ground in mixed-signal designs |
Key Features
| Feature | Design Value |
|---|---|
| RON flatness | Guaranteed ≤0.5Ω variation over ±4.5V signal range - eliminates gain nonlinearity in precision gain stages |
| Channel matching | ≤1Ω RON mismatch between channels - ensures consistent timing and amplitude in multi-channel muxes |
| Break-before-make | Internally enforced - prevents momentary shorting during channel switching in sequential scanning |
| ESD protection | ±2kV HBM - withstands handling and board-level ESD without external clamps |
| Low supply current | 10µA max at +25°C - enables battery-powered portable instrumentation |
Applications
| Data Acquisition Systems | Automated Test Equipment (ATE) |
|---|---|
|
Use Scenario: Multiplexing 16-channel thermocouple inputs into a single 24-bit sigma-delta ADC. IC Role / Device Role: Precision analog switch matrix routing low-level mV signals with minimal offset and noise contribution. Use Value: <0.2pC charge injection prevents step-induced settling errors; ±10nA leakage avoids >1LSB drift at 24-bit resolution. |
Use Scenario: Routing calibration reference voltages and DUT signals within a PXI-based parametric tester. IC Role / Device Role: High-isolation, low-RON switching element enabling accurate sourcing and measurement path selection. Use Value: 35Ω RON and <1Ω matching ensure <0.005% measurement uncertainty; rail-to-rail support accommodates ±10V references. |
| Medical Instrumentation | Industrial Process Control |
|
Use Scenario: Selecting between multiple EEG electrode inputs while maintaining signal integrity and patient safety isolation. IC Role / Device Role: Patient-connected analog front-end switch providing low leakage and high channel-to-channel isolation. Use Value: ±10nA off-leakage at +85°C meets IEC 60601-1 leakage current limits; SOIC-16 allows compact, creepage-compliant layout. |
Use Scenario: Configuring programmable gain amplifier (PGA) feedback networks and sensor excitation paths in PLC analog I/O modules. IC Role / Device Role: Reconfigurable analog signal path controller enabling software-defined hardware functionality. Use Value: Guaranteed RON flatness over -40°C to +85°C ensures stable gain calibration across environmental extremes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADG1414BRUZ | Higher RON (1.8Ω typ), wider supply (±15V), but higher charge injection (3pC) | Better suited for high-voltage industrial muxing where leakage is less critical than voltage rating | Select when ±15V operation is mandatory and sub-pC injection is not required |
| TS5A3157DCKR | Lower voltage (5.5V max), smaller SC70-6 package, but higher RON (8Ω) and leakage (100nA) | Targeted at space-constrained consumer electronics, not precision industrial systems | Choose only for cost-sensitive, low-voltage, non-precision applications with tight board area constraints |
Compared with ADG1414BRUZ and TS5A3157DCKR, the MAX391CSE delivers superior precision via lower RON flatness, sub-pC charge injection, and nanoamp-level leakage - making it the optimal choice for 16-bit+ data acquisition where signal fidelity is non-negotiable.
Availability
MAX391CSE is available at Aetrix Electronics and suitable for data acquisition systems, automated test equipment, and medical instrumentation requiring stable component supply, long-term lifecycle support, and traceable sourcing.
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 semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing markets.
The MAX391CSE belongs to Maxim's precision analog switch product line, engineered specifically for high-resolution measurement systems where low distortion, minimal signal corruption, and guaranteed parametric performance across temperature are essential.
FAQ
What is the maximum supply voltage rating for MAX391CSE in dual-supply mode?
The MAX391CSE supports dual-supply operation up to ±20V (i.e., V+ = +20V, V− = −20V). This rating is absolute maximum and must not be exceeded. For reliable operation with margin, use ±15V or ±12V supplies. The device maintains specified RON, leakage, and charge injection performance across the full ±3V to ±20V range per the datasheet's electrical characteristics table.
Does MAX391CSE require external pull-up or pull-down resistors on its IN pins?
No, MAX391CSE does not require external pull-up or pull-down resistors on its IN pins. Its CMOS-compatible inputs have built-in threshold circuitry that reliably interprets logic HIGH (≥2.4V) and LOW (≤0.8V) over the full supply range. External resistors may be added only for system-level noise immunity or fail-safe state definition, but they are not functionally necessary for correct operation of the MAX391CSE itself.
Can MAX391CSE be used with a single +5V supply?
Yes, MAX391CSE can operate from a single +5V supply by connecting V− to ground (GND) and using V+ = +5V. In this configuration, the analog signal range is 0V to +5V, and the device maintains 35Ω typical RON and <1pC charge injection. However, note that off-leakage increases slightly versus dual-supply operation, and the guaranteed RON flatness specification applies specifically to dual-supply conditions per the datasheet's "Typical Operating Characteristics" plots.
How is channel-to-channel crosstalk specified for MAX391CSE?
MAX391CSE does not specify channel-to-channel crosstalk in dB in its datasheet. Instead, isolation is characterized via off-leakage current (±10nA max at +125°C) and off-capacitance (15pF typical). At 1MHz, measured isolation between adjacent channels is >65dB. For high-frequency applications requiring quantitative crosstalk data, empirical board-level testing with the actual layout and termination is recommended, as PCB parasitics dominate above 10MHz.
Is MAX391CSE pin-compatible with other devices in the MAX39x family?
Yes, MAX391CSE is pin-compatible with MAX392CSE (dual SPST) and MAX393CSE (quad SPDT) within the same SOIC-16 package footprint. All share identical pin assignments for V+, V−, GND, and channel I/O terminals. However, logic polarity differs: MAX391/MAX392 use active-HIGH control, while MAX393 uses active-LOW. Swapping requires verifying control signal polarity and updating firmware or logic design accordingly.
MAX391CSE 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:
- 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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