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Analog Devices Inc./Maxim Integrated MAX4236AESA+
- Part No.:
- MAX4236AESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4236AESA+.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,460
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Product details
Overview
The MAX4236AESA+ from Maxim Integrated is a grade-A, unity-gain-stable, rail-to-rail output operational amplifier with ultra-low 20µV (max) input offset voltage at +25°C, 2µV/°C max offset drift, and 1pA input bias current. It operates from +2.4V to +5.5V single supply, delivers 1.7MHz gain-bandwidth, and features shutdown mode with 0.1µA quiescent current - ideal for battery-powered precision sensor front-ends such as thermocouple or electrochemical amplifiers.
For engineers reviewing the MAX4236AESA+ datasheet, MAX4236AESA+ pinout, MAX4236AESA+ application, or MAX4236AESA+ equivalent, this page provides verified specifications, SO-8 package terminal mapping, real-world use cases in low-drift instrumentation, and validated alternative options for high-accuracy analog signal conditioning.
Technical Context
The MAX4236AESA+ uses a BiCMOS input stage enabling ground-sensing operation (input common-mode range extends to VEE − 0.15V) and rail-to-rail output swing within 150mV of rails into 1kΩ. Its DC precision is achieved without chopper stabilization, avoiding switching artifacts in sensitive measurement paths.
It supports single-supply operation down to +2.4V, maintains ≥110dB large-signal open-loop gain (RL = 100kΩ), and handles up to 200pF capacitive loads while remaining stable at unity gain - critical for driving ADC input filters or long traces in portable instrumentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 20µV (max) at +25°C - enables sub-0.01% error in 16-bit sensor signal chains without trimming. |
| Offset Voltage Drift | 2µV/°C (max) - ensures <±0.2mV total drift over −40°C to +85°C operating range. |
| Input Bias Current | 1pA (typ) - preserves high-impedance node integrity in piezoelectric charge amplifiers and long-time-constant integrators. |
| Gain-Bandwidth Product | 1.7MHz - supports stable unity-gain configurations for low-noise buffer stages before SAR ADCs. |
| Quiescent Supply Current | 350µA (typ) in active mode; 0.1µA in shutdown - extends battery life in always-on sensor nodes. |
| Rail-to-Rail Output Swing | Within 150mV of VCC/VEE into 1kΩ - maximizes dynamic range in +3V/+5V systems without level-shifting. |
| Shutdown Function | SHDN pin forces output to high-impedance state with 4µs recovery time - enables power-gating in multi-channel data acquisition. |
Pinout & Package
MAX4236AESA+ is housed in an 8-pin SO (SOIC-N) surface-mount package with standard 150-mil width and 1.27mm pitch. Pin 1 is marked by a beveled corner or dot; thermal pad is not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Amplifier output - drives external load or next-stage input; rail-to-rail swing capability reduces headroom loss. |
| 2 | IN− | Inverting input - connects to feedback network or sensor reference path in transimpedance configurations. |
| 3 | IN+ | Noninverting input - accepts high-impedance sensor signals (e.g., thermocouple, strain gauge bridge) with minimal loading. |
| 4 | VEE | Negative supply - tied to GND in single-supply operation; requires 0.1µF bypass capacitor for noise suppression. |
| 5 | N.C. | No connection - internally unconnected; must remain floating or grounded per layout best practices. |
| 6 | VCC | Positive supply - accepts +2.4V to +5.5V; 0.1µF ceramic bypass capacitor mandatory near pin. |
| 7 | N.C. | No connection - internally unconnected; no routing or termination required. |
| 8 | SHDN | Shutdown control - logic-low disables amplifier and reduces ICC to 0.1µA; must not be left floating. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low offset voltage grade A | 20µV max at +25°C - eliminates need for manual nulling in factory-calibrated medical sensors. |
| Ground-sensing input stage | Input common-mode range includes VEE − 0.15V - enables direct interface to bridge sensors referenced to system ground. |
| 1pA input bias current | Enables >10¹²Ω effective input impedance - critical for maintaining accuracy in electrochemical pH or ion-selective electrodes. |
| 200pF capacitive load drive | Stable operation into typical ADC input RC filters without external compensation - simplifies anti-aliasing design. |
| 4µs shutdown recovery | Fast wake-up supports burst-mode sampling in energy-constrained IoT edge nodes. |
Applications
| Thermocouple Amplifier | Piezoelectric Sensor Interface |
|---|---|
|
Use Scenario: Amplifying µV-level Seebeck voltages from K-type thermocouples across −40°C to +85°C ambient. IC Role / Device Role / Timing Role: Precision DC-coupled instrumentation front-end with cold-junction compensation support. Use Value: 2µV/°C max TCVOS ensures <±0.17mV total offset drift over full temperature range, meeting Class 1 thermocouple accuracy. |
Use Scenario: Charge amplification for high-impedance piezoelectric accelerometers in structural health monitoring. IC Role / Device Role / Timing Role: Low-bias-current, low-noise transimpedance amplifier converting charge to voltage. Use Value: 1pA input bias current minimizes leakage-induced baseline drift during long-duration vibration measurements. |
| Electrochemical Sensor Front-End | Battery-Powered Strain Gauge System |
|
Use Scenario: Signal conditioning for amperometric glucose sensors requiring stable baseline and low 1/f noise. IC Role / Device Role / Timing Role: Ultra-low-input-current transducer amplifier with rail-to-rail output for wide-dynamic-range current-to-voltage conversion. Use Value: 0.2µVp-p (0.1Hz–10Hz) input noise preserves resolution in sub-nA current detection. |
Use Scenario: Wheatstone bridge excitation and differential amplification in portable load-cell meters. IC Role / Device Role / Timing Role: High-CMRR (≥80dB over temp) buffer and gain stage rejecting bridge supply ripple and EMI. Use Value: 120dB PSRR at DC rejects battery voltage sag effects on bridge output, improving weight measurement stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA333AIDR | Zero-drift architecture; 0.1µV/°C max drift vs. 2µV/°C; higher 350nA input bias current. | Better drift performance but unsuitable for pA-level sensor nodes due to 350× higher input current. | Select OPA333AIDR only when drift dominates over input current in battery-free or line-powered systems. |
| LTC2050CMS8#PBF | Chopper-stabilized; 0.5µV max VOS; 20pA input bias; 1.5MHz GBW; higher 1.1mA ICC. | Superior offset spec but introduces 100kHz switching noise - problematic in low-noise audio or seismic sensing. | Choose LTC2050CMS8#PBF where absolute offset trumps noise floor, and chopper artifacts can be filtered. |
Compared with OPA333AIDR and LTC2050CMS8#PBF, the MAX4236AESA+ uniquely balances ultra-low input bias current (1pA), low drift (2µV/°C), and chopper-free operation - making it optimal for high-impedance, battery-powered precision analog front-ends where noise, power, and input loading are co-constrained.
Availability
MAX4236AESA+ is available at Aetrix Electronics and suitable for thermocouple amplifiers, piezoelectric sensor interfaces, and electrochemical sensor front-ends requiring stable component supply across industrial, medical, and test equipment lifecycles.
Supply support for MAX4236AESA+ 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 high-performance analog and mixed-signal ICs for precision, power, and interface applications in industrial, medical, and communications systems.
The MAX4236/MAX4237 family targets ultra-precision DC signal conditioning - specifically engineered for sensor front-ends where offset, drift, and input bias current directly limit resolution and long-term calibration stability.
FAQ
What is the maximum input offset voltage specification for MAX4236AESA+ at +25°C?
The MAX4236AESA+ has a guaranteed maximum input offset voltage of 20µV at +25°C (Grade A, SO-8 package). This value is 100% production tested per Maxim's datasheet revision 0 (August 2001), and applies specifically to the A-grade version in SO and µMAX packages - not the SOT23 or Grade B variants.
Does MAX4236AESA+ support single-supply operation, and what is its minimum supply voltage?
Yes, MAX4236AESA+ supports true single-supply operation from +2.4V to +5.5V. Its input common-mode range extends to VEE − 0.15V (i.e., −0.15V when VEE = GND), and output swings rail-to-rail - enabling full-scale signal utilization in +3V systems without negative rails or level shifters.
What is the function of the SHDN pin on MAX4236AESA+, and how does it affect output behavior?
The SHDN pin on MAX4236AESA+ controls shutdown mode: pulled low (≤0.3 × VCC), it reduces quiescent current to ≤0.1µA and places the amplifier output in a high-impedance state. Pulled high (≥0.7 × VCC), normal operation resumes with 4µs recovery time - ensuring fast reactivation in duty-cycled sensor systems.
Can MAX4236AESA+ drive a 1000pF load without oscillation?
No - MAX4236AESA+ is specified for stable operation with up to 200pF capacitive load (no sustained oscillations). Driving 1000pF would require external isolation resistance or a dedicated buffer stage, as excessive capacitance degrades phase margin and risks instability in unity-gain configuration.
Is the MAX4236AESA+ pin-compatible with other members of the MAX4236/MAX4237 family in SO-8 packages?
Yes - all SO-8 variants (MAX4236AESA+, MAX4236BESA+, MAX4237AESA+, MAX4237BESA+) share identical pinouts and footprint. However, MAX4236 variants are unity-gain stable (1.7MHz GBW), while MAX4237 variants require ≥5V/V closed-loop gain (7.5MHz GBW); mixing them without circuit review risks instability.
MAX4236AESA+ 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:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.3V/µs
- Gain Bandwidth Product:
- 1.7 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 5 µV
- Current - Supply:
- 350µA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.4 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX4236AESA+ FAQ
1.How can I place an order for MAX4236AESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4236AESA+ 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 MAX4236AESA+ reliable?
The price and inventory of MAX4236AESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4236AESA+ is usually 5 days.
3.What payment methods are accepted for MAX4236AESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4236AESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4236AESA+?
MAX4236AESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4236AESA+ 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 MAX4236AESA+?
For technical support, including MAX4236AESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4236AESA+ requirements.
6.How does Aetrix verify that MAX4236AESA+ is sourced from the original manufacturer or authorized distributors?
All MAX4236AESA+ 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 MAX4236AESA+ meets industry standards.
7.What is the process for return or replacement of MAX4236AESA+?
All MAX4236AESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4236AESA+, 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 MAX4236AESA+ part is unused and in its original packaging.
Return procedure for MAX4236AESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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