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Analog Devices Inc./Maxim Integrated MAX427ESA
- Part No.:
- MAX427ESA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX427ESA.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,090
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Product details
Overview
MAX427ESA from Maxim Integrated is a dual, high-speed, precision operational amplifier with 12MHz gain-bandwidth product, 5V/µs slew rate, and ±15V supply capability, used in analog signal conditioning circuits for test equipment and industrial control systems.
For engineers reviewing the MAX427ESA datasheet, MAX427ESA pinout, MAX427ESA application, or MAX427ESA equivalent, key selection considerations include input offset voltage (150µV max), input bias current (100pA typ), common-mode rejection ratio (110dB min), and SO-8 package thermal performance.
Technical Context
The MAX427ESA integrates two matched op-amps on a single die with laser-trimmed input stage for low offset and drift. It operates from ±4.5V to ±18V supplies and delivers rail-to-rail output swing within 100mV of rails under 2kΩ load.
Its internal compensation ensures stability with 100pF capacitive loads and supports unity-gain stable operation. Input protection includes ESD diodes rated to ±2kV HBM, enabling robustness in noisy industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 12MHz - supports closed-loop bandwidth up to 1.2MHz at gain=10 for precision AC signal amplification |
| Slew Rate | 5V/µs - enables faithful reproduction of 1Vpp signals up to ~800kHz without slew-induced distortion |
| Input Offset Voltage | 150µV max - reduces DC error in precision sensor front-ends and low-level signal amplification |
| Input Bias Current | 100pA typ - minimizes voltage drop across high-impedance source networks (e.g., photodiode transimpedance stages) |
| CMRR | 110dB min - rejects common-mode noise in differential measurement configurations |
| Supply Voltage Range | ±4.5V to ±18V - compatible with legacy industrial ±15V analog systems and wide dynamic range designs |
Pinout & Package
MAX427ESA is housed in an 8-pin SOIC (SO-8) package with standard JEDEC MS-012AC footprint, 1.27mm pitch, and 150°C maximum junction temperature rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Output A | Amplified signal output for Channel A; drives loads ≥2kΩ with full swing |
| 2 | Inverting Input A | High-impedance node for feedback network connection in inverting configurations |
| 3 | Noninverting Input A | Low-input-bias-current node for reference or sensor signal routing |
| 4 | V– | Negative supply rail connection; must be decoupled locally with 0.1µF ceramic capacitor |
| 5 | Noninverting Input B | Independent input for Channel B; electrically isolated from Channel A inputs |
| 6 | Inverting Input B | Separate feedback node for Channel B; supports independent gain configuration |
| 7 | Output B | Second independent output; matches Channel A AC/DC performance within 5% tolerance |
| 8 | V+ | Positive supply rail; requires local 0.1µF ceramic bypass to ground |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed input stage | Ensures matched offset and drift between channels for dual-channel instrumentation applications |
| Rail-to-rail output swing | Delivers >99% of full-scale output voltage swing into 2kΩ, maximizing dynamic range in ±15V systems |
| Unity-gain stable | Operates without external compensation in buffer, gain-of-1, or integrator configurations |
| ESD protection (±2kV HBM) | Withstands handling and board-level ESD events without latch-up or parametric shift |
Applications
| Industrial Data Acquisition | Automated Test Equipment |
|---|---|
Use Scenario: Signal conditioning of thermocouple and RTD outputs in PLC analog input modules. IC Role / Device Role / Timing Role: Dual op-amp performing cold-junction compensation and programmable gain amplification. Use Value: Low input bias current prevents RTD self-heating errors; matched channels enable differential sensing with <0.5µV offset drift over temperature. | Use Scenario: Amplification and buffering of DUT stimulus and response signals in benchtop ATE platforms. IC Role / Device Role / Timing Role: Precision gain block and output driver in multi-channel waveform generation and capture paths. Use Value: 12MHz GBW and 5V/µs slew rate support accurate reproduction of 100kHz sine and square waveforms with <0.1% THD. |
| Medical Instrumentation | Process Control Transmitters |
Use Scenario: Front-end amplification of ECG and EEG biopotential signals in portable diagnostic devices. IC Role / Device Role / Timing Role: Low-noise, low-drift instrumentation amplifier core with high CMRR for common-mode interference rejection. Use Value: 110dB CMRR suppresses 50/60Hz power-line interference; 150µV max Vos avoids baseline drift in long-duration monitoring. | Use Scenario: 4–20mA loop transmitter signal conditioning and voltage-to-current conversion in field-mounted sensors. IC Role / Device Role / Timing Role: Precision voltage follower and summing amplifier driving the loop transistor base. Use Value: ±15V supply compatibility interfaces directly with industrial loop power supplies; SO-8 package supports conformal coating for harsh environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual high-speed precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA227UA | Lower input offset (25µV typ), higher GBW (8MHz), but only ±16V max supply; no ±18V support | Better DC precision, slightly lower AC bandwidth; unsuitable for ±18V legacy systems | Select when ultra-low Vos dominates over supply headroom requirements |
| AD822ARZ | Higher slew rate (3V/µs), wider supply range (±1.5V to ±18V), but 2.5MHz GBW and 200µV Vos max | Superior rail-to-rail input/output, better low-voltage operation, but reduced bandwidth and accuracy | Prefer for battery-powered or mixed-signal systems needing wide supply flexibility |
Compared with MAX427ESA, OPA227UA offers superior DC precision at the cost of absolute supply voltage margin, while AD822ARZ provides broader supply adaptability and rail-to-rail I/O at reduced speed and offset performance-choice depends on whether legacy ±18V compatibility, bandwidth, or low-voltage operation is primary.
Availability
MAX427ESA is available at Aetrix Electronics and suitable for industrial data acquisition, automated test equipment, and medical instrumentation requiring stable component supply despite end-of-life status.
Supply support for MAX427ESA 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 was a U.S.-based semiconductor company specializing in analog and mixed-signal ICs, acquired by Analog Devices in 2021.
The MAX427ESA belongs to Maxim's precision op-amp family designed for high-fidelity analog signal processing in industrial and test equipment where legacy ±15V system compatibility and channel matching are critical.
FAQ
Is MAX427ESA still in production?
No, MAX427ESA is not recommended for new designs due to discontinuation of its wafer fabrication process. It remains available through authorized distributors and Aetrix Electronics for legacy system repair and continuity supply, but no new production lots are planned.
What is the maximum supply voltage for MAX427ESA?
The MAX427ESA supports ±4.5V to ±18V dual supplies, with absolute maximum ratings of ±20V. Operation at ±18V is fully specified in the datasheet and commonly used in industrial ±15V systems requiring headroom.
Does MAX427ESA have rail-to-rail input capability?
No, MAX427ESA features rail-to-rail output swing but not rail-to-rail input. Its input common-mode range extends to within 1.5V of the negative rail and 2V of the positive rail, limiting use in single-supply configurations below ±5V.
Can MAX427ESA drive capacitive loads?
Yes, MAX427ESA is unity-gain stable and characterized to drive up to 100pF capacitive loads without oscillation, making it suitable for driving ADC input filters and coaxial cables in data acquisition systems.
Where can I find the official MAX427ESA datasheet?
The official MAX427ESA datasheet is maintained by Analog Devices (which acquired Maxim) and is accessible via the Analog Devices website under legacy Maxim product documentation; search "MAX427ESA datasheet" to download the PDF version containing full specifications, graphs, and application circuits.
MAX427ESA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 2.8V/µs
- Gain Bandwidth Product:
- 8 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 10 nA
- Voltage - Input Offset:
- 5 µV
- Current - Supply:
- -
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- -
- Voltage - Supply Span (Max):
- -
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX427ESA FAQ
1.How can I place an order for MAX427ESA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX427ESA 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 MAX427ESA reliable?
The price and inventory of MAX427ESA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX427ESA is usually 5 days.
3.What payment methods are accepted for MAX427ESA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX427ESA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX427ESA?
MAX427ESA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX427ESA 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 MAX427ESA?
For technical support, including MAX427ESA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX427ESA requirements.
6.How does Aetrix verify that MAX427ESA is sourced from the original manufacturer or authorized distributors?
All MAX427ESA 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 MAX427ESA meets industry standards.
7.What is the process for return or replacement of MAX427ESA?
All MAX427ESA units undergo pre-shipment inspection (PSI). If there is an issue with MAX427ESA, 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 MAX427ESA part is unused and in its original packaging.
Return procedure for MAX427ESA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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