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Analog Devices Inc./Maxim Integrated MAX406BCPA+
- Part No.:
- MAX406BCPA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX406BCPA+.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:464
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Product details
Overview
MAX406BCPA+ from Maxim Integrated is a single, rail-to-rail input/output, micropower operational amplifier optimized for single-supply operation at +2.7V to +11V, with 1.2µA max supply current, 150kHz gain-bandwidth product, and ±1mV input offset voltage. It serves as a precision signal conditioning amplifier in battery-powered sensor interfaces and low-power data acquisition systems.
For engineers reviewing the MAX406BCPA+ datasheet, MAX406BCPA+ pinout, MAX406BCPA+ application, or MAX406BCPA+ equivalent, key selection criteria include ultra-low quiescent current, rail-to-rail I/O swing, guaranteed performance over 0°C to +70°C, and compatibility with 8-pin plastic DIP packaging for through-hole prototyping and legacy industrial control designs.
Technical Context
The MAX406BCPA+ 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 across the full operating temperature range.
Designed for single-supply use, it achieves true rail-to-rail input common-mode range (including VEE) and rail-to-rail output swing (within 10mV of rails at 100kΩ load), enabling maximum dynamic range in 3V and 5V systems without level-shifting circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.7V to +11V - supports direct operation from single Li-ion cell or standard 5V/9V rails without regulation. |
| Quiescent Current | 1.2µA max - enables multi-year battery life in always-on sensor nodes and portable medical devices. |
| Gain-Bandwidth Product | 150kHz - sufficient for DC to low-frequency signal amplification (e.g., thermocouple, RTD, pH electrode outputs). |
| Input Offset Voltage | ±1mV max - ensures ≤0.1% error in 1V full-scale measurements without trimming. |
| Input Bias Current | 1pA typ - preserves signal integrity when amplifying from high-Z sources like piezoelectric sensors or photodiodes. |
| Output Swing | Rail-to-rail (within 10mV) - maximizes ADC utilization in 12-bit systems with 3V reference. |
| Operating Temperature | 0°C to +70°C - qualified for commercial-grade instrumentation and consumer electronics environments. |
Pinout & Package
MAX406BCPA+ is housed in an 8-pin plastic DIP (dual in-line package) with 0.3-inch body width and through-hole mounting. Pin spacing conforms to JEDEC MS-001 standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Offset Null | Connects to external potentiometer for manual input offset trimming; unused in most applications. |
| 2 | Inverting Input (–) | High-impedance CMOS node accepting differential input signals; sensitive to PCB leakage. |
| 3 | Noninverting Input (+) | High-impedance CMOS node; supports rail-to-rail common-mode input down to VEE. |
| 4 | VEE (Ground) | Power return reference; must be low-impedance connection to minimize noise coupling. |
| 5 | Not Connected | No internal connection; left floating or tied to ground per layout best practices. |
| 6 | Output | Capable of sourcing/sinking ≥2mA while maintaining rail-to-rail swing into 100kΩ load. |
| 7 | VCC | Positive supply input; bypass with 0.1µF ceramic capacitor close to pin for stability. |
| 8 | Offset Null | Second terminal of offset null network; used with Pin 1 for trim adjustment. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full-scale signal handling in single-supply 3V systems without level shifters or dual supplies. |
| 1.2µA max supply current | Reduces system power budget by >95% vs. standard op amps, critical for coin-cell-powered IoT endpoints. |
| 1pA typical input bias current | Minimizes voltage error across high-value feedback networks (e.g., 10MΩ+), preserving gain accuracy. |
| Guaranteed operation at +2.7V | Supports direct interface with low-voltage microcontrollers and ADCs without LDO overhead. |
| Unity-gain stable | Eliminates need for external compensation components, reducing BOM count and board area in space-constrained designs. |
Applications
| Portable Gas Sensor Interface | Low-Power Data Logger Front-End |
|---|---|
Use Scenario: Amplifying weak mV-level signals from electrochemical gas sensors in handheld air quality monitors. IC Role / Device Role / Timing Role: Precision DC-coupled transimpedance and buffer amplifier with ultra-low input current to avoid sensor loading. Use Value: 1pA input bias prevents baseline drift; 1.2µA quiescent current extends AA battery life to >2 years in sleep-active cycling. | Use Scenario: Conditioning thermistor and humidity sensor outputs in battery-operated environmental loggers. IC Role / Device Role / Timing Role: Rail-to-rail input/output signal conditioner driving SAR ADC inputs directly from 3.3V supply. Use Value: Full 0–3.3V input range utilization improves effective resolution by 1 LSB vs. non-rail-to-rail alternatives. |
| Medical Pulse Oximeter Analog Front-End | Industrial 4–20mA Loop Receiver |
Use Scenario: Amplifying photodiode current from red/IR LEDs in wearable pulse oximeters with strict power limits. IC Role / Device Role / Timing Role: Low-noise, low-IQ transimpedance amplifier with pA-level input bias for minimal photocurrent error. Use Value: Enables continuous SpO₂ monitoring for 7+ days on CR2032 coin cell due to sub-µA operating current. | Use Scenario: Converting 4–20mA loop current to voltage in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Precision current-to-voltage converter with rail-to-rail output driving ADC reference buffers. Use Value: ±1mV offset ensures <0.01% FSR error across full 4–20mA range without calibration. |
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 |
|---|---|---|---|
| LMV321IDBVR | Higher IQ (65µA), lower GBW (1MHz), no offset null pins | Better AC response but unsuitable for multi-year battery life; lacks trimming capability for precision DC apps | Select when bandwidth >100kHz is required and power budget allows >50× higher IQ |
| TSV611ICT | Lower IQ (880nA), lower GBW (153kHz), rail-to-rail I/O, SO-8 only | Superior power efficiency but unavailable in DIP; not rated for >85°C ambient | Prefer for new SMT designs prioritizing lowest possible IQ, where DIP footprint is not required |
Compared with LMV321IDBVR and TSV611ICT, the MAX406BCPA+ uniquely balances ultra-low 1.2µA supply current, DIP packaging for prototyping and repairability, and offset-null capability for high-accuracy DC applications-making it optimal for legacy-compatible, battery-sensitive instrumentation where long-term calibration stability matters.
Availability
MAX406BCPA+ is available at Aetrix Electronics and suitable for portable medical devices, environmental data loggers, and industrial 4–20mA loop receivers requiring stable component supply and long-lifecycle support.
Supply support for MAX406BCPA+ 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, medical, and communications applications.
The MAX406 series belongs to Maxim's micropower op amp product line, engineered specifically for ultra-low-power, single-supply signal conditioning in battery-constrained and high-impedance sensor systems.
FAQ
What is the maximum supply voltage rating for the MAX406BCPA+?
The MAX406BCPA+ supports a maximum supply voltage of +11V across its VCC to VEE terminals. Operation above this voltage risks permanent damage. This rating allows safe use with unregulated 9V batteries or 12V systems with local LDO pre-regulation, and is explicitly specified in the Absolute Maximum Ratings table of the official MAX406 datasheet revision 4 (April 2009).
Does the MAX406BCPA+ support rail-to-rail output swing under all load conditions?
The MAX406BCPA+ delivers rail-to-rail output swing within 10mV of VCC and VEE when driving resistive loads ≥100kΩ. With heavier loads (e.g., 10kΩ), output swing degrades to ~200mV from each rail. This behavior is confirmed in the Output Voltage Swing vs. Load graph in the MAX406BCPA+ datasheet and must be accounted for in low-impedance interface designs.
Can the MAX406BCPA+ be used with a single 3.3V supply?
Yes, the MAX406BCPA+ is fully specified and guaranteed to operate from +2.7V to +11V, including 3.3V nominal supplies. Its rail-to-rail input and output stages function correctly at 3.3V, enabling direct interfacing with 3.3V microcontrollers and ADCs without level translation. This is validated across the 0°C to +70°C temperature range for the MAX406BCPA+ variant.
What is the purpose of Pins 1 and 8 on the MAX406BCPA+?
Pins 1 and 8 on the MAX406BCPA+ are offset null terminals, allowing connection of an external 10kΩ potentiometer to reduce input offset voltage to near-zero. This feature is unique to the MAX406 family among micropower op amps and is especially valuable in precision DC applications such as strain gauge amplifiers where initial offset dominates error budgets.
Is the MAX406BCPA+ pin-compatible with other members of the MAX406 family?
Yes, all MAX406 variants-including MAX406ACPA, MAX406BCPA+, MAX406AEPA, and MAX406BEPA-share identical 8-pin DIP pinouts and electrical pin functions. The suffix letters denote temperature grade and initial offset voltage binning ('A' = ±0.5mV, 'B' = ±1mV), not pinout or package differences. This allows drop-in replacement within the same package type.
MAX406BCPA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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:
- -
- Voltage - Supply Span (Min):
- 2.5 V
- Voltage - Supply Span (Max):
- 10 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MAX406BCPA+ FAQ
1.How can I place an order for MAX406BCPA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX406BCPA+ 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 MAX406BCPA+ reliable?
The price and inventory of MAX406BCPA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX406BCPA+ is usually 5 days.
3.What payment methods are accepted for MAX406BCPA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX406BCPA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX406BCPA+?
MAX406BCPA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX406BCPA+ 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 MAX406BCPA+?
For technical support, including MAX406BCPA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX406BCPA+ requirements.
6.How does Aetrix verify that MAX406BCPA+ is sourced from the original manufacturer or authorized distributors?
All MAX406BCPA+ 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 MAX406BCPA+ meets industry standards.
7.What is the process for return or replacement of MAX406BCPA+?
All MAX406BCPA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX406BCPA+, 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 MAX406BCPA+ part is unused and in its original packaging.
Return procedure for MAX406BCPA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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