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Analog Devices Inc./Maxim Integrated MAX4236BESA
- Part No.:
- MAX4236BESA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4236BESA.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,697
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Product details
Overview
The MAX4236BESA from Maxim Integrated is a grade-B, unity-gain stable, rail-to-rail output operational amplifier with ultra-low input bias current (1pA), 50µV max input offset voltage at +25°C, and 4.5µV/°C max offset drift - designed for high-precision DC signal conditioning in single-supply +3V/+5V systems such as electrochemical sensor front-ends and strain gauge amplifiers.
For engineers reviewing the MAX4236BESA datasheet, MAX4236BESA pinout, MAX4236BESA application, or MAX4236BESA equivalent, this page delivers verified specifications, SO-8 package terminal mapping, real-world use cases, and two confirmed alternative op amps with documented functional trade-offs for low-drift, low-input-current instrumentation designs.
Technical Context
The MAX4236BESA uses a CMOS input stage to achieve 1pA input bias current and operates from +2.4V to +5.5V single supply (or ±1.2V to ±2.75V dual supply), with input common-mode range extending to VEE −0.15V and rail-to-rail output swing within 150mV of rails into 1kΩ. Its 1.7MHz gain-bandwidth product and 0.3V/µs slew rate support stable unity-gain configurations without chopper artifacts.
It integrates a dedicated SHDN pin that reduces quiescent current to <0.1µA and forces output into high-impedance state, enabling power cycling in battery-powered instrumentation. The device is specified across −40°C to +85°C and tested per grade-B limits for offset voltage (±50µV max at +25°C) and drift (±4.5µV/°C max).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | ±50 µV max at +25°C (Grade B) - enables sub-100µV system-level DC error budgets in precision transducer interfaces |
| Offset Voltage Drift | ±4.5 µV/°C max - ensures <±0.45mV total drift over −40°C to +85°C operating range |
| Input Bias Current | ±1 pA typical - preserves signal integrity in high-impedance sensor nodes (e.g., piezoelectric, pH electrodes) |
| Gain-Bandwidth Product | 1.7 MHz - supports stable unity-gain operation with adequate phase margin for low-noise DC-coupled amplification |
| Supply Voltage Range | +2.4V to +5.5V single supply - compatible with Li-ion, 3.3V, and 5V logic rails without level-shifting |
| Rail-to-Rail Output Swing | Within 150 mV of rails into 1kΩ - maximizes dynamic range in low-voltage, single-supply data acquisition stages |
| Quiescent Current | 350 µA typical in active mode; <0.1 µA in shutdown - extends battery life in portable instrumentation |
Pinout & Package
MAX4236BESA is housed in an 8-pin SO (Small Outline) package with standard SOIC-8 footprint (5.0mm × 6.2mm, 1.27mm pitch). Pin 1 is marked by a beveled corner or dot; pin numbering follows standard SOIC convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Amplifier output node - rail-to-rail capable, high-impedance in shutdown mode when SHDN = low |
| 2 | IN− | Inverting input - high-impedance CMOS node; requires guarding in >100MΩ sensor applications |
| 3 | IN+ | Noninverting input - matched to IN− for optimal CMRR; sensitive to PCB leakage currents |
| 4 | VEE | Negative supply pin - connect to GND in single-supply operation; bypass with 0.1µF capacitor |
| 5 | N.C. | No internal connection - leave unconnected; no routing or thermal relief required |
| 6 | VCC | Positive supply input - bypass with 0.1µF ceramic capacitor close to pin for stability |
| 7 | SHDN | Active-low shutdown control - logic low (<0.3×VCC) disables amplifier and reduces ICC to <0.1µA |
| 8 | N.C. | No internal connection - electrically isolated; may be used for mechanical anchoring only |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input bias current | 1pA typical - eliminates voltage error across high-value feedback resistors (>100MΩ) in integrators and charge amplifiers |
| Ground-sensing input stage | Input common-mode range includes VEE −0.15V - enables direct interface to sensors referenced below ground (e.g., thermocouples, shunt-based current monitors) |
| Shutdown mode with high-Z output | 0.1µA quiescent current + tri-stated output - allows multiplexed analog front-ends without signal contention or loading |
| Capacitive load drive capability | Stable with up to 200pF load - supports direct driving of ADC input capacitors or long traces without external isolation |
| Low-frequency noise performance | 0.2µVP-P (0.1Hz–10Hz) - minimizes baseline wander in DC-coupled medical and environmental sensor amplifiers |
Applications
| Strain Gauge Signal Conditioning | Piezoelectric Sensor Interface |
|---|---|
|
Use Scenario: Amplifying low-level mV-level differential signals from full-bridge strain gauges in load cells or pressure sensors under varying temperature conditions. IC Role / Device Role / Timing Role: Primary instrumentation amplifier stage providing gain, offset trimming, and rail-to-rail output drive into 16-bit SAR ADCs. Use Value: Grade-B 50µV offset and 4.5µV/°C drift limit total error to <±1.2mV over full industrial temperature range - sufficient for 0.1% FS accuracy. |
Use Scenario: Charge-to-voltage conversion for high-impedance piezoelectric accelerometers and acoustic emission sensors. IC Role / Device Role / Timing Role: Low-bias-current, low-noise transimpedance amplifier with guarded input and shutdown control for duty-cycled sensing. Use Value: 1pA input bias current permits use of minimal feedback capacitance (e.g., 100pF), preserving bandwidth and SNR while reducing sensitivity to stray capacitance. |
| Electrochemical Sensor Front-End | Battery-Powered Portable Instrumentation |
|
Use Scenario: Amplifying nanoamp-level currents from pH, dissolved oxygen, or glucose biosensors using three-electrode potentiostats. IC Role / Device Role / Timing Role: Transimpedance amplifier with ultra-high input impedance and low input current to avoid polarizing reference electrodes. Use Value: Sub-picoamp input bias prevents electrode polarization drift and enables stable >100-second time constants in low-power amperometric measurements. |
Use Scenario: Precision analog signal chain in handheld multimeters, gas detectors, or field-deployable environmental monitors. IC Role / Device Role / Timing Role: Core signal conditioner enabling single-supply operation, shutdown-controlled power gating, and rail-to-rail output compatibility with 3.3V microcontrollers. Use Value: 350µA active current + <0.1µA shutdown current extends CR2032 battery life to >2 years in intermittent-read applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-precision, low-input-current op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA333AIDR | Chopper-stabilized architecture; 10µV max offset (A-grade), 0.1µV/°C drift, but 50pA input bias current | Better DC accuracy but higher input current - unsuitable for >10MΩ source impedances or ultra-low-leakage electrochemical cells | Select OPA333AIDR only if offset drift dominates design requirements and sensor impedance is <1MΩ |
| LTC2050CS8#PBF | Zero-drift auto-zero topology; 3µV max offset, 0.015µV/°C drift, 25pA input bias current, 3MHz GBW | Superior drift performance but higher supply current (120µA) and incompatible shutdown behavior (no high-Z output) | Choose LTC2050CS8#PBF when sub-µV drift is mandatory and power budget allows >100µA continuous draw |
Compared with OPA333AIDR and LTC2050CS8#PBF, the MAX4236BESA uniquely balances ultra-low input bias current (1pA), moderate offset (50µV), and true high-impedance shutdown - making it the only viable option for battery-powered, high-impedance sensor nodes requiring both precision and power gating.
Availability
MAX4236BESA is available at Aetrix Electronics and suitable for strain gauge amplifiers, piezoelectric sensor interfaces, and electrochemical measurement systems requiring stable component supply, long-term manufacturability, and guaranteed grade-B parametric compliance.
Supply support for MAX4236BESA 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, medical, and communications applications.
The MAX4236/MAX4237 family was engineered for ultra-precision, low-power, single-supply instrumentation - targeting applications where chopper noise, input current, and offset drift directly impact measurement fidelity in sensor front-ends.
FAQ
What is the maximum input offset voltage specification for MAX4236BESA at +25°C?
The MAX4236BESA has a maximum input offset voltage of ±50 µV at +25°C, as guaranteed for Grade B devices in SO-8 and µMAX packages per the manufacturer's electrical characteristics table. This value is production-tested and applies specifically to the MAX4236BESA variant - not the A-grade or SOT23 versions.
Does MAX4236BESA support true rail-to-rail output swing?
Yes, the MAX4236BESA delivers rail-to-rail output swing: within 150 mV of VCC and within 100 mV of VEE into a 1kΩ load at +25°C, and within 250 mV of either rail over the full −40°C to +85°C temperature range. This enables full utilization of the supply voltage in single-supply data acquisition systems.
What is the function of the N.C. pins on MAX4236BESA?
MAX4236BESA has two no-connect (N.C.) pins: Pin 5 and Pin 8 in the SO-8 package. These pins are not internally bonded and serve no electrical function. They must remain unconnected - neither tied to ground nor routed - though they may be used for mechanical stabilization during PCB assembly.
Can MAX4236BESA operate from a +3.3V single supply?
Yes, MAX4236BESA is fully specified for operation from +2.4V to +5.5V single supply. At +3.3V, it maintains all key performance parameters including 350µA quiescent current, 50µV max offset, and rail-to-rail output swing - making it ideal for modern 3.3V embedded systems interfacing with low-output sensors.
How does the shutdown feature affect the output state of MAX4236BESA?
When the SHDN pin is pulled low (≤0.3×VCC), MAX4236BESA enters shutdown mode: quiescent current drops below 0.1µA and the output is actively driven into a high-impedance (tri-state) condition - electrically disconnecting it from downstream circuitry without requiring external isolation switches.
MAX4236BESA 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:
- 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:
- 30 mA
- 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
MAX4236BESA FAQ
1.How can I place an order for MAX4236BESA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4236BESA 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 MAX4236BESA reliable?
The price and inventory of MAX4236BESA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4236BESA is usually 5 days.
3.What payment methods are accepted for MAX4236BESA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4236BESA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4236BESA?
MAX4236BESA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4236BESA 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 MAX4236BESA?
For technical support, including MAX4236BESA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4236BESA requirements.
6.How does Aetrix verify that MAX4236BESA is sourced from the original manufacturer or authorized distributors?
All MAX4236BESA 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 MAX4236BESA meets industry standards.
7.What is the process for return or replacement of MAX4236BESA?
All MAX4236BESA units undergo pre-shipment inspection (PSI). If there is an issue with MAX4236BESA, 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 MAX4236BESA part is unused and in its original packaging.
Return procedure for MAX4236BESA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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