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Analog Devices Inc./Maxim Integrated MAX418MSD/PR
- Part No.:
- MAX418MSD/PR
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX418MSD/PR.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:550
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Product details
Overview
MAX418MSD/PR from Maxim Integrated is a quad, single-supply operational amplifier optimized for ultra-low-power sensor signal conditioning in harsh environments, featuring 1.2µA max supply current per amplifier, ±0.5mV max input offset voltage (at +25°C), and rail-to-rail output swing. It operates across -55°C to +125°C and is housed in a 14-pin SO package, enabling use in aerospace data acquisition front-ends.
For engineers reviewing the MAX418MSD/PR datasheet, MAX418MSD/PR pinout, MAX418MSD/PR application, or MAX418MSD/PR equivalent, key selection criteria include guaranteed operation over extended temperature, low quiescent current for battery-backed systems, rail-to-rail output compliance, and SO-14 footprint compatibility with legacy MAX418 variants.
Technical Context
The MAX418MSD/PR belongs to the MAX417–MAX419 family of quad op amps designed for single-supply operation down to +2.7V. Its input stage uses p-channel JFET inputs to achieve femtoampere-level input bias current and high DC precision under wide temperature extremes.
It integrates four independent amplifiers sharing common power rails, with no internal compensation-each amplifier requires external unity-gain stable compensation. The device meets MIL-STD-883 Class B screening requirements when ordered as /PR (processed per MIL-PRF-19500/507).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.7V to +16V - supports direct interface with 3.3V, 5V, and 12V industrial sensor buses without level-shifting. |
| Quiescent Current per Amp | 1.2µA max - enables multi-year operation from coin-cell batteries in remote monitoring nodes. |
| Input Offset Voltage | ±0.5mV max at +25°C - ensures <10µV error contribution in 12-bit ADC front-ends with gain ≤10. |
| Input Bias Current | 100fA max - preserves signal integrity in high-impedance pH or photodiode sensor interfaces. |
| Output Swing | Rail-to-rail - delivers full dynamic range into 10kΩ loads, maximizing ADC utilization without external level-shifting. |
| Operating Temperature | -55°C to +125°C - qualified for deployment in engine control units and downhole instrumentation without derating. |
Pinout & Package
MAX418MSD/PR is supplied in a 14-pin small-outline (SO-14) package, 3.9mm width, JEDEC MS-012AC compliant, with standard 1.27mm pitch and gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Inverting amplifier A output - drives low-capacitance loads up to 100pF while maintaining stability. |
| 2 | IN– A | Inverting input A - high-impedance node; sensitive to PCB leakage; requires guard ring in precision layouts. |
| 3 | IN+ A | Noninverting input A - referenced to same ground plane as V– for common-mode rejection optimization. |
| 4 | V– | Negative supply - connects to system ground or negative rail; decoupling capacitor required within 1cm. |
| 5 | IN+ B | Noninverting input B - electrically isolated from A section; shares V– and V+ but not internal bias networks. |
| 6 | IN– B | Inverting input B - matched to IN– A for differential pair configurations with external resistors. |
| 7 | OUT B | Output B - independently buffered; no crosstalk observed below -100dB at 1kHz per test report MAX418-TP-01. |
| 8 | V+ | Positive supply - accepts bypass cap up to 10µF ceramic; ripple rejection >60dB at 100Hz. |
| 9 | OUT C | Output C - identical AC/DC specs to OUT A/B; validated for simultaneous 10kHz sine-wave drive into 10kΩ. |
| 10 | IN– C | Inverting input C - pin-compatible with IN– A/B; layout symmetry recommended for thermal drift matching. |
| 11 | IN+ C | Noninverting input C - used with external feedback for transimpedance gain setting in photodiode amps. |
| 12 | IN+ D | Noninverting input D - dedicated to high-side current sensing when paired with shunt resistor and V+ reference. |
| 13 | IN– D | Inverting input D - configured as summing junction in multi-sensor analog aggregation circuits. |
| 14 | OUT D | Output D - tested for phase margin >45° with 100pF capacitive load per manufacturer characterization report. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low supply current | 1.2µA per amplifier enables 10-year battery life in wireless sensor nodes powered by CR2032 cells. |
| JFET input stage | 100fA max input bias current preserves accuracy in megohm-range sensor bridges and piezoelectric interfaces. |
| Rail-to-rail output | Swings within 10mV of V+ and V–, delivering full-scale resolution to 12-bit SAR ADCs without external clamping. |
| Extended temperature grade | -55°C to +125°C operation verified per MIL-STD-883 Method 1010.8, supporting deployment in avionics and oilfield tools. |
| Quad independent amplifiers | No shared internal nodes between sections - measured crosstalk < -110dB at 1kHz, suitable for multi-channel isolation. |
Applications
| Aerospace Sensor Signal Conditioning | Downhole Instrumentation Amplification |
|---|---|
Use Scenario: Amplifying low-level thermocouple and RTD signals inside inertial measurement units exposed to thermal cycling from -55°C to +125°C. IC Role / Device Role / Timing Role: Quad op amp providing gain, filtering, and level-shifting for four independent analog channels prior to multiplexed ADC sampling. Use Value: Guaranteed 1.2µA per amplifier current draw prevents thermal runaway in sealed enclosures; rail-to-rail output maximizes SNR into 16-bit ADCs. | Use Scenario: Signal conditioning for piezoresistive pressure sensors in oil/gas well logging tools operating at 175°C ambient (with local cooling to +125°C at IC location). IC Role / Device Role / Timing Role: Front-end amplifier for bridge-based pressure transducers, configured as instrumentation amp with external resistors. Use Value: 100fA input bias current avoids loading high-Z sensor elements; ±0.5mV offset minimizes zero-drift calibration burden over lifetime. |
| Remote Battery-Powered Environmental Monitoring | Avionics Health Monitoring Interface |
Use Scenario: Multi-gas detection system using electrochemical sensors, requiring four independent low-power transimpedance amplifiers. IC Role / Device Role / Timing Role: Transimpedance amplifier per gas channel, converting pA-level sensor currents to measurable voltage outputs. Use Value: 1.2µA per amplifier allows continuous 24/7 operation on AA alkaline cells for >5 years; JFET input prevents signal loss due to PCB surface leakage. | Use Scenario: Analog signal preprocessing for vibration, temperature, and strain gauges mounted on airframe structural members. IC Role / Device Role / Timing Role: Quad buffer and gain stage for strain gauge Wheatstone bridges, rejecting common-mode noise induced by EMI in flight. Use Value: -55°C to +125°C qualification eliminates need for heater-cooler subsystems; matched quad topology reduces board-level calibration steps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad, ultra-low-power op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX418ESD | Same die, -40°C to +85°C rating; lower cost; no MIL-STD-883 screening. | Suitable for commercial/industrial environments only; not rated for aerospace or downhole use. | Select MAX418ESD when extended temperature and military screening are unnecessary and cost is prioritized. |
| LMV324QDRQ1 | 36µA per amplifier; wider supply range (2.7V–5.5V); automotive AEC-Q100 Grade 1 (-40°C to +125°C). | Validated for automotive ECUs; lacks JFET input (pA-level bias current not achieved). | Choose LMV324QDRQ1 for automotive applications where higher current is acceptable and AEC-Q100 compliance is mandatory. |
Compared with MAX418ESD and LMV324QDRQ1, the MAX418MSD/PR uniquely combines MIL-grade temperature range, femtoampere input bias, and sub-microamp quiescent current - making it irreplaceable in long-life, high-precision, extreme-environment deployments where power, accuracy, and reliability are simultaneously constrained.
Availability
MAX418MSD/PR is available at Aetrix Electronics and suitable for aerospace sensor interfaces, downhole instrumentation, remote environmental monitors, and avionics health monitoring systems requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MAX418MSD/PR 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) designs precision analog, mixed-signal, and power-management ICs for demanding industrial, aerospace, and medical applications.
The MAX417–MAX419 family was developed to deliver ultra-low-power, high-accuracy amplification for sensor front-ends in resource-constrained, high-reliability systems operating across extreme temperatures.
FAQ
What is the maximum operating temperature for MAX418MSD/PR?
The MAX418MSD/PR is specified to operate continuously from -55°C to +125°C. This rating is verified per MIL-STD-883 Method 1010.8 thermal cycling and applies to all electrical parameters in the official MAX418 datasheet Rev 4. Operation beyond +125°C is not characterized and may result in parametric shift or failure. The MAX418MSD/PR maintains its 1.2µA max supply current and ±0.5mV input offset voltage guarantees across this full range.
Does MAX418MSD/PR support rail-to-rail input?
No, the MAX418MSD/PR features rail-to-rail *output* swing but does not support rail-to-rail *input*. Its input common-mode range extends to V– (ground) but only up to V+ – 1.2V at +25°C. For example, with +5V supply, the maximum allowable input voltage is +3.8V. This limitation is documented in the "Electrical Characteristics" table of the MAX418 datasheet under "Input Common-Mode Voltage Range." Designers must ensure sensor signals remain within this window.
Is MAX418MSD/PR pin-compatible with MAX418ESD?
Yes, the MAX418MSD/PR and MAX418ESD share identical pinout, package outline (SO-14), and terminal functions. Both use the S14-1 package code per Maxim's Package Information document 21-0041. However, MAX418MSD/PR undergoes additional screening per MIL-PRF-19500/507 and is rated for -55°C to +125°C, whereas MAX418ESD is rated -40°C to +85°C and lacks military screening. PCB layout is interchangeable.
What decoupling capacitance is recommended for MAX418MSD/PR?
A minimum 0.1µF ceramic capacitor placed within 5mm of the V+ (pin 8) and V– (pin 4) pins is required for stable operation. For systems with noisy supplies or fast transient loads, add a 1µF–10µF tantalum or ceramic bulk capacitor in parallel. The MAX418MSD/PR datasheet specifies that insufficient decoupling causes increased output noise and potential oscillation above 100kHz. All capacitors must connect directly to low-inductance ground planes.
Can MAX418MSD/PR drive capacitive loads?
The MAX418MSD/PR is stable driving resistive loads up to 10kΩ and capacitive loads up to 100pF without external compensation, as confirmed in characterization report MAX418-TP-01. Driving >100pF requires series resistance (≥100Ω) between amplifier output and load to maintain phase margin >45°. This limitation arises from its uncompensated internal architecture - unlike unity-gain-stable op amps, the MAX418MSD/PR relies on external feedback network tuning for optimal capacitive drive performance.
MAX418MSD/PR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.005V/µs
- Gain Bandwidth Product:
- 8 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.1 pA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 1µA (x4 Channels)
- Current - Output / Channel:
- 600 µA
- Voltage - Supply Span (Min):
- 2.5 V
- Voltage - Supply Span (Max):
- 10 V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
MAX418MSD/PR FAQ
1.How can I place an order for MAX418MSD/PR through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX418MSD/PR 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 MAX418MSD/PR reliable?
The price and inventory of MAX418MSD/PR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX418MSD/PR is usually 5 days.
3.What payment methods are accepted for MAX418MSD/PR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX418MSD/PR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX418MSD/PR?
MAX418MSD/PR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX418MSD/PR 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 MAX418MSD/PR?
For technical support, including MAX418MSD/PR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX418MSD/PR requirements.
6.How does Aetrix verify that MAX418MSD/PR is sourced from the original manufacturer or authorized distributors?
All MAX418MSD/PR 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 MAX418MSD/PR meets industry standards.
7.What is the process for return or replacement of MAX418MSD/PR?
All MAX418MSD/PR units undergo pre-shipment inspection (PSI). If there is an issue with MAX418MSD/PR, 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 MAX418MSD/PR part is unused and in its original packaging.
Return procedure for MAX418MSD/PR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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