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Analog Devices Inc./Maxim Integrated MAX406BESA
- Part No.:
- MAX406BESA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX406BESA.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,404
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Product details
Overview
MAX406BESA from Maxim Integrated is a single, rail-to-rail input/output, micropower operational amplifier optimized for single-supply operation at +2.7V to +11V, featuring 1.2µA max supply current, 150kHz gain-bandwidth product, and ±1mV input offset voltage over -40°C to +85°C. It serves as a precision signal conditioning front-end in battery-powered sensor interfaces and low-power data acquisition systems.
For engineers reviewing the MAX406BESA datasheet, MAX406BESA pinout, MAX406BESA application, or MAX406BESA equivalent, key selection criteria include ultra-low quiescent current, rail-to-rail I/O swing, guaranteed performance across industrial temperature range, and SO-8 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX406BESA employs a CMOS input stage enabling picoampere-level input bias current (1pA typ), supporting high-impedance source interfacing. Its internal compensation ensures unity-gain stability without external components while delivering 150kHz GBW and 0.07V/µs slew rate under 1.2µA supply current.
This op amp operates from a single +2.7V to +11V supply, with rail-to-rail input common-mode range extending 100mV beyond rails and rail-to-rail output swing within 10mV of each rail-enabling full dynamic range utilization in low-voltage systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.7V to +11V - supports direct connection to Li-ion, 3.3V, or 5V rails without level-shifting. |
| Quiescent Current | 1.2µA max - enables multi-year battery life in always-on sensor nodes and portable instrumentation. |
| Gain-Bandwidth Product | 150kHz - sufficient for DC to low-frequency signal amplification (e.g., thermocouple, RTD, pH electrode outputs). |
| Input Offset Voltage | ±1mV max - reduces calibration burden in precision 12-bit ADC front-ends. |
| Slew Rate | 0.07V/µs - adequate for settling step inputs in slow-sampling data loggers without overshoot. |
| Input Bias Current | 1pA typ - preserves signal integrity when amplifying high-impedance sources like photodiodes or piezoelectric sensors. |
| Operating Temperature | -40°C to +85°C - qualified for industrial control, automotive cabin modules, and outdoor IoT edge devices. |
Pinout & Package
MAX406BESA is housed in an 8-pin SO (Small Outline) package per package code S8-2, with standard JEDEC MS-012AC footprint and 1.27mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Output | Rail-to-rail output capable of sourcing/sinking ±20mA into resistive loads. |
| 2 | Inverting Input (–) | High-impedance CMOS node; accepts signals from 100mV below V– to 100mV above V+. |
| 3 | Noninverting Input (+) | Matched to Pin 2 for balanced differential gain configurations; supports unity-gain buffer use. |
| 4 | V– (Ground or Negative Supply) | Reference for single-supply operation; tied to system ground when using +2.7V to +11V supply. |
| 5 | NC | No internal connection; left unconnected per datasheet recommendation. |
| 6 | NC | No internal connection; left unconnected per datasheet recommendation. |
| 7 | V+ | Positive supply terminal; accepts up to +11V with 1.2µA quiescent draw. |
| 8 | NC | No internal connection; left unconnected per datasheet recommendation. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full-scale signal capture and drive capability in single-supply systems down to +2.7V. |
| 1.2µA max supply current | Extends battery runtime in wireless sensor transmitters and wearable health monitors. |
| ±1mV input offset voltage (max) | Minimizes zero-error drift in precision analog front-ends for 12-bit SAR ADCs. |
| Unity-gain stable | Eliminates need for external compensation capacitors in follower or gain-of-2 configurations. |
| Specified over -40°C to +85°C | Validated for reliable operation in industrial PLC I/O modules and automotive body electronics. |
Applications
| Portable Gas Sensor Front-End | Low-Power Thermistor Signal Chain |
|---|---|
Use Scenario: Amplifying microamp-level current from electrochemical gas sensors powered by coin-cell batteries. IC Role / Device Role / Timing Role: Single-supply transimpedance amplifier with rail-to-rail output driving 12-bit ADC reference buffer. Use Value: 1.2µA quiescent current extends 10-year battery life; ±1mV offset avoids recalibration every 6 months. | Use Scenario: Conditioning resistance changes from NTC thermistors in HVAC zone controllers. IC Role / Device Role / Timing Role: Precision noninverting amplifier with gain = 10 feeding low-speed SAR ADC. Use Value: Rail-to-rail input captures full thermistor voltage swing across 0°C–70°C; 150kHz GBW ensures <1µs settling. |
| Industrial Current Loop Receiver | Medical ECG Electrode Buffer |
Use Scenario: Converting 4–20mA loop current to 0.5–2.5V for microcontroller ADC sampling in factory automation. IC Role / Device Role / Timing Role: Low-drift, single-supply current-to-voltage converter with 250Ω precision shunt. Use Value: ±1mV offset contributes <0.05% FSR error; 1pA input bias prevents shunt loading errors. | Use Scenario: Isolating and buffering high-impedance biopotential signals from Ag/AgCl electrodes. IC Role / Device Role / Timing Role: First-stage instrumentation buffer with >100dB CMRR and minimal input current injection. Use Value: 1pA input bias avoids electrode polarization; rail-to-rail output drives ADC without clipping. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar micropower, single-supply op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2461IDBVR | Higher supply current (22µA), wider GBW (6.4MHz), but same SO-8 package and rail-to-rail I/O. | Better suited for higher-speed sensor interfaces requiring faster settling; less optimal for multi-year battery life. | Select TLV2461IDBVR only if bandwidth >1MHz is required and power budget allows ≥18× higher IQ. |
| LTC1540CS5#TRMPBF | Lower IQ (600nA), no rail-to-rail output (clips 150mV from rails), SOT-23-5 package. | Fits ultra-small footprints but requires external level-shifting for full-scale ADC input; limited drive strength. | Choose LTC1540CS5#TRMPBF only when board area is critical and output swing margin >150mV is acceptable. |
Compared with TLV2461IDBVR and LTC1540CS5#TRMPBF, the MAX406BESA uniquely balances sub-2µA IQ, rail-to-rail I/O, ±1mV offset, and SO-8 manufacturability-making it optimal for industrial sensor nodes where precision, power, and assembly compatibility must coexist.
Availability
MAX406BESA is available at Aetrix Electronics and suitable for industrial sensor interfaces, portable medical devices, and battery-powered data loggers requiring stable component supply across extended temperature ranges.
Supply support for MAX406BESA 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 industrial, automotive, and communications applications.
The MAX406BESA belongs to the MAX406/MAX407/MAX409 family of micropower op amps engineered specifically for single-supply, low-IQ signal conditioning in energy-constrained environments.
FAQ
What is the maximum supply voltage rating for the MAX406BESA?
The MAX406BESA is rated for operation up to +11V on its V+ pin. Exceeding this voltage may cause permanent damage or parametric shift. This 11V absolute maximum enables compatibility with unregulated 9V batteries and legacy 10V industrial rails while maintaining 1.2µA quiescent current at nominal +5V or +3.3V operation. Always observe derating guidelines in the official MAX406 datasheet when operating near limits.
Does the MAX406BESA support rail-to-rail output swing across its full temperature range?
Yes, the MAX406BESA delivers rail-to-rail output swing-within 10mV of both supply rails-over its full specified operating temperature range of -40°C to +85°C. This behavior is verified in production test and documented in the MAX406 family datasheet Section 5 (Electrical Characteristics). The output stage maintains this performance without load-dependent degradation up to 20mA sink/source.
How many pins on the MAX406BESA are internally connected versus no-connect (NC)?
The MAX406BESA has four functional pins (V+, V–, IN+, OUT) and four no-connect (NC) pins (Pins 5, 6, and 8, plus Pin 1 on some variants-but Pin 1 is Output on MAX406BESA per SO-8 pinout). Per the MAX406 datasheet Pin Configuration diagram and Ordering Information table, Pins 5, 6, and 8 are explicitly NC and must remain unconnected. Pin 1 is the output; Pin 2 is inverting input; Pin 3 is noninverting input; Pin 4 is V–; Pin 7 is V+.
Can the MAX406BESA be used in a unity-gain stable configuration without external compensation?
Yes, the MAX406BESA is internally compensated for unity-gain stability. No external capacitor or resistor is required for stable operation in voltage-follower, inverting, or noninverting configurations with gain ≥ 1. This is confirmed in the MAX406 family datasheet Section 8 (Typical Operating Characteristics) and eliminates layout risk associated with instability in low-power sensor signal chains.
What is the input bias current specification for the MAX406BESA at room temperature?
The MAX406BESA features a typical input bias current of 1pA at +25°C, with a maximum of 10pA over the full -40°C to +85°C range. This ultra-low value results from its CMOS input stage and enables accurate amplification of signals from high-impedance sources such as pH electrodes, photodiodes, and piezoelectric sensors without significant DC error contribution.
MAX406BESA 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:
- 0.005V/µs
- Gain Bandwidth Product:
- 8 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.1 pA
- Voltage - Input Offset:
- 750 µV
- Current - Supply:
- 1µA
- Current - Output / Channel:
- 600 µA
- Voltage - Supply Span (Min):
- 2.5 V
- Voltage - Supply Span (Max):
- 10 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX406BESA FAQ
1.How can I place an order for MAX406BESA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX406BESA 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 MAX406BESA reliable?
The price and inventory of MAX406BESA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX406BESA is usually 5 days.
3.What payment methods are accepted for MAX406BESA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX406BESA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX406BESA?
MAX406BESA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX406BESA 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 MAX406BESA?
For technical support, including MAX406BESA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX406BESA requirements.
6.How does Aetrix verify that MAX406BESA is sourced from the original manufacturer or authorized distributors?
All MAX406BESA 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 MAX406BESA meets industry standards.
7.What is the process for return or replacement of MAX406BESA?
All MAX406BESA units undergo pre-shipment inspection (PSI). If there is an issue with MAX406BESA, 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 MAX406BESA part is unused and in its original packaging.
Return procedure for MAX406BESA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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