MAX14131FAEE+ - 4-Ch 1kVrms 150Mbps Digital Isolator | Maxim Integrated
Référence : MAX14131FAEE+ ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $4.3 | $4,30 |
| 10 | $3.87 | $38,70 |
| 100 | $3.18 | $318,00 |
| 500 | $2.65 | $1 325,00 |
| 1 000 | $2.3 | $2 300,00 |
MAX14131FAEE+ Présentation
A digital isolator is an IC that transmits digital signals across an isolation barrier (galvanic isolation) using capacitive, inductive, or optical coupling, while blocking DC and high-voltage transients. Digital isolators sit within the signal-chain hierarchy alongside op-amps, level translators, and isol gate drivers, and are commonly used in place of optocouplers where higher speed, lower propagation delay, and tighter channel-to-channel matching are required. The MAX14131 belongs to the broader category of ICs > Interface ICs > Digital Isolators.
Key features include four unidirectional channels in a 3/1 (3 forward + 1 reverse) configuration, default-low output state, 8 ns typical propagation delay, and 1000 Vrms withstand voltage for 60 seconds per UL 1577. The wide 1.71 V to 5.5 V supply range on both VDDA and VDDB allows direct interfacing with 1.8 V, 3.3 V, and 5 V logic without level shifters, simplifying multi-rail designs.
Internally, the MAX14131 uses Maxim's proprietary silicon-based capacitive coupling, which avoids the LED aging and current-transfer-ratio degradation inherent to optocouplers. Each channel is implemented as a differential capacitive link with on-chip encoding/decoding, achieving 150 Mbps NRZ signaling with low pulse-width distortion.
Typical applications include isolated SPI / UART / I2C data links, industrial field-bus isolation (RS-485, CAN, Profibus), isolated gate-drive signaling, medical patient-isolation interfaces, and battery-management systems that require galvanic separation between high-voltage stacks and low-voltage MCUs.
When designing with the MAX14131, place 0.1 µF bypass capacitors on each VDD pin within 2 mm of the package, and keep the channel trace lengths matched. The device dissipates negligible power across the barrier, but the SSOP theta_JA of around 110 °C/W should be respected at extreme ambient temperatures.
This page synthesizes distributor pricing, drop-in cross-reference alternatives, and practical design notes not found in the standalone manufacturer datasheet, providing engineers with a single source for parametric comparison and PCB-level replacement decisions.
Alternatives de remplacement direct pour MAX14131FAEE+ — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
MAX14131FAEE+T
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MAX14130FAEE+
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MAX14131EWE+
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
MAX14130EWE+
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
MAX14930AWE+
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MAX14131FAEE+ Spécifications
| Isolation Voltage | 1000 Vrms |
| Number of Channels | 4 |
| Channel Configuration | 3 forward / 1 reverse (3/1) |
| Débit de données | 150 Mbps (max) |
| Propagation Delay | 8 ns (typical) |
| Common-Mode Transient Immunity (CMTI) | 25 kV/µs (typical) |
| Supply Voltage Range (VDD1, VDD2) | 1.71 V to 5.5 V |
| Default Output State | Low |
| Plage de température de fonctionnement | -40 °C to +125 °C |
| Boîtier | 16-SSOP (0.154", 3.90 mm width) |
| Type de montage | Surface Mount |
| Isolation Technology | Capacitive coupling (Maxim proprietary) |
| Withstand Voltage Test | 1000 Vrms for 60 s (per UL 1577) |
| Statut RoHS | Compliant |
| Lead-Free | Yes |
Configuration des broches de MAX14131FAEE+
| Broche 1 | VDD1 — Power supply for side 1 (1.71 V to 5.5 V) |
| Broche 2 | GND1 — Ground reference for side 1 |
| Broche 3 | IN1 — Logic input, channel 1 (forward) |
| Broche 4 | NC — Not connected (per datasheet) |
| Broche 5 | NC — Not connected (per datasheet) |
| Broche 6 | IN2 — Logic input, channel 2 (forward) |
| Broche 7 | IN3 — Logic input, channel 3 (forward) |
| Broche 8 | GND1 — Ground reference for side 1 |
| Broche 9 | GND2 — Ground reference for side 2 |
| Broche 10 | OUT_R — Logic output, reverse channel |
| Broche 11 | OUT3 — Logic output, channel 3 (forward) |
| Broche 12 | OUT2 — Logic output, channel 2 (forward) |
| Broche 13 | NC — Not connected (per datasheet) |
| Broche 14 | NC — Not connected (per datasheet) |
| Broche 15 | OUT1 — Logic output, channel 1 (forward) |
| Broche 16 | VDD2 — Power supply for side 2 (1.71 V to 5.5 V) |
Applications typiques
MAX14131FAEE+ convient pour 6 applications: Isolated SPI / UART Data Link, Industrial RS-485 / CAN Field-Bus Isolation, Isolated Gate-Drive Signaling, Battery-Management Isolation, Medical Patient-Isolation Interface, Isolated I/O Module for PLC Systems.
Isolated SPI / UART Data Link
The MAX14131FAEE+ is a natural fit for isolated SPI and UART data links in industrial and battery-management designs. Its 150 Mbps data rate comfortably exceeds SPI clock rates up to 50 MHz and asynchronous UART up to several Mbps, while the 3/1 channel arrangement maps cleanly onto SPI's three forward signals (SCK, MOSI, CS) plus one reverse signal (MISO). The 8 ns propagation delay preserves timing margins in half- and full-duplex protocols. Placed between an MCU and a remote sensor or actuator across a 1 kV isolation barrier, the MAX14131 eliminates the need for optocouplers, whose LED aging would otherwise limit field life. The 25 kV/µs CMTI is sufficient to reject fast transients on long motor or field wiring.
Recommandé
Industrial RS-485 / CAN Field-Bus Isolation
In industrial RS-485 and CAN networks, the MAX14131FAEE+ provides the galvanic isolation barrier between the bus transceiver and the host MCU. Its 1 kVrms withstand meets the basic isolation requirement of most factory-floor installations and bus segments; up to 2.75 kVrms parts (MAX14930 family) are used for reinforced isolation on mains-coupled segments. The wide 1.71 V to 5.5 V supply range lets the part interface with both 3.3 V MCUs and 5 V transceivers without level shifters. Designers typically place the MAX14131 between an SN65HVD75-type transceiver and the UART pins of an STM32 or MAXQ microcontroller, achieving robust data transmission up to 20 Mbps over shielded twisted-pair cable without common-mode ground-loop noise coupling into the host logic.
Recommandé
Isolated Gate-Drive Signaling
The MAX14131FAEE+ serves as the low-voltage signal-side isolator in isolated gate-driver systems for power MOSFETs and IGBTs in motor drives, solar inverters, and UPS equipment. While dedicated gate-driver ICs (such as the ADuM4135 or MAX22710) implement the high-voltage drive stage, the MAX14131 is often used to transport PWM control signals across the isolation barrier when the gate-driver is co-located with the MCU side. Its 25 kV/µs CMTI ensures PWM edges stay clean even when switching high dV/dt nodes on the high-voltage side; mis-qualified isolators would corrupt PWM timing during fast MOSFET transitions. The 8 ns propagation delay contributes minimal phase lag in closed-loop current control loops.
Recommandé
Battery-Management Isolation
In multi-cell lithium-ion battery packs for EVs, e-bikes, and grid storage, the MAX14131FAEE+ isolates the high-voltage cell-monitoring stack from the low-voltage BMS host MCU. The 1 kVrms isolation matches typical 48 V to 400 V pack-to-chassis requirements, while the 3/1 channel direction naturally fits the SPI interface to cell-monitor front-ends such as the MAX178 or MAX173 families. Used across each stack isolation boundary, multiple MAX14131 parts can daisy-chain as the cell count grows, with each isolator protecting low-voltage logic from cell-voltage transients during high-current pulses. The 150 Mbps speed supports fast cell balancing and overcurrent events that must propagate within 1 ms.
Recommandé
Medical Patient-Isolation Interface
For medical equipment that touches the patient, the MAX14131FAEE+ provides signal-level isolation within Type BF or Type CF patient circuits, where 1 kVrms basic isolation is sufficient between the patient-applied part and the operator-accessible chassis. The 25 kV/µs CMTI and 8 ns propagation make it ideal for ECG, SpO2, and infusion-pump front-ends where signal fidelity and low jitter are critical. Designers combine the MAX14131 with isolated ADCs and isol gate-drivers to form a complete IEC 60601-1 compliant signal chain. The small 16-SSOP footprint keeps the isolator close to the patient connector, minimizing stray capacitance that could degrade common-mode performance.
Recommandé
Isolated I/O Module for PLC Systems
Programmable logic controllers (PLCs) use the MAX14131FAEE+ to isolate digital I/O modules from the backplane logic, blocking ground-potential differences and switching transients on the field side. With 4 channels per chip, a single MAX14131 handles one isolated 4-channel DI or DO module; multiple parts are paralleled for 8, 16, or 32-channel modules. The 1 kVrms withstand satisfies most 24 V fieldbus isolation requirements, and the 25 kV/µs CMTI rejects the dV/dt noise generated by adjacent relay and contactor coils. Compared to optocouplers, the MAX14131 halves PCB area, improves channel-to-channel matching, and eliminates LED aging that historically limited PLC field life to 10-15 years.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MAX14131FAEE+ — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | MAX14131FAEE+T | MAX14130FAEE+ | MAX14131EWE+ | MAX14130EWE+ | MAX14930AWE+ |
|---|---|---|---|---|---|---|
| Brand | Analog Devices / Maxim Integrated | Analog Devices / Maxim Integrated | Analog Devices / Maxim Integrated | Analog Devices / Maxim Integrated | Analog Devices / Maxim Integrated | Analog Devices / Maxim Integrated |
| Package | 16-SSOP | 16-SSOP | 16-SSOP | 16-SOIC | 16-SOIC | 16-SOIC |
| Isolation Voltage | 1000 Vrms | 1000 Vrms | 1000 Vrms | 1000 Vrms | 1000 Vrms | 2750 Vrms |
| Data Rate | 150 Mbps | 150 Mbps | 150 Mbps | 150 Mbps | 150 Mbps | 150 Mbps |
| Number of Channels | 4 (3/1) | 4 (3/1) | 4 (3/1) | 4 (3/1) | 4 (3/1) | 4 (3/1) |
| Default Output State | Low | Low | High | Low | High | Low |
| CMTI | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs |
| Propagation Delay | 8 ns | 8 ns | 8 ns | 8 ns | 8 ns | 8 ns |
| Supply Voltage Range | 1.71 V to 5.5 V | 1.71 V to 5.5 V | 1.71 V to 5.5 V | 1.71 V to 5.5 V | 1.71 V to 5.5 V | 1.71 V to 5.5 V |
Principaux différenciateurs
- Compact 16-SSOP footprint at 1 kVrms (vs MAX14930AWE+)
- Lower default-state complexity for typical SPI (vs MAX14130FAEE+)
- Single 1.71 V to 5.5 V supply simplifies multi-rail interfaces (vs Generic opto-coupled isolator)
Notes de conception
Place a 0.1 µF low-ESR ceramic bypass capacitor within 2 mm of each VDD1 (pin 1) and VDD2 (pin 16) pin to GND, plus a bulk 1 µF to 10 µF on each supply rail. According to the Maxim datasheet, the device draws only a few milliamps per side, but CMTI performance depends on stable low-impedance supplies. If driving the inputs from a switching DC-DC, add an LC pi-filter on each VDD rail to prevent high-frequency ripple from coupling across the isolation barrier.
Keep the MAX14131FAEE+ in a 16-SSOP package placed on a PCB region with at least 4 mm of clearance between the side-1 and side-2 ground planes to maintain 1 kVrms isolation in pollution-degree-2 environments. According to UL 1577, the PCB must withstand a 1000 Vrms dielectric test, so do not route any traces or copper pours under or across the part, and avoid silkscreen over the package body. Use side-1 and side-2 ground planes as star-grounded at the isolation barrier.
Match input and output trace lengths to within 1 mm to minimize propagation-delay skew between channels, especially when using the part for SPI where simultaneous switching can cause timing violations. According to the datasheet, channel-to-channel skew is typically below 2 ns; matched routing preserves this margin. For 150 Mbps operation, use 50 Ω controlled-impedance traces and series-termination resistors at the driver outputs if the trace length exceeds 25 mm.
Do not apply DC bias above 5.5 V to either VDD1 or VDD2, including transient overshoot from upstream regulators; sustained over-voltage will permanently damage the isolation barrier. Ensure that power-up sequencing brings up VDD1 and VDD2 within 100 ms of each other; wider delays can cause uncontrolled output states during cold-start in multi-rail systems. Per the datasheet, do not load the outputs beyond 4 mA DC or place capacitance over 15 pF directly on the output pins, as this slows edge rates and degrades CMTI.
When laying out multi-channel isolation, group all side-1 traces on the inner layer adjacent to side-1 GND, and all side-2 traces on the inner layer adjacent to side-2 GND, with the part spanning between these planes. Avoid routing side-1 traces near side-2 traces on outer layers; this couples capacitive noise across the barrier and can corrupt high-speed signals during fast common-mode events.
Informations de conformité
RoHS compliant per Maxim product page. UL 1577 rated for 1000 Vrms/60 s dielectric withstand. AEC-Q100 not applicable - this is an industrial/consumer-grade part, not automotive-qualified.
