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Analog Devices Inc./Maxim Integrated MAX409BESA
- Part No.:
- MAX409BESA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX409BESA.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,931
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Product details
Overview
MAX409BESA from Maxim Integrated is a dual, single-supply operational amplifier optimized for ultra-low-power sensor signal conditioning in battery-powered systems, featuring 1.2µA max supply current per amplifier, 150kHz gain-bandwidth product, and rail-to-rail output swing at ±0.1V from rails with 10kΩ load - deployed in portable medical sensors and low-power data loggers.
For engineers reviewing the MAX409BESA datasheet, MAX409BESA pinout, MAX409BESA application, or MAX409BESA equivalent, key selection criteria include guaranteed operation over -40°C to +85°C, SO-8 package compatibility with standard PCB footprints, input offset voltage ≤1.5mV (max), and single-supply operation down to +2.7V - critical for energy-constrained analog front-ends.
Technical Context
The MAX409BESA integrates two independent precision op amps on a single die, each with CMOS input stage enabling input bias current <1pA and input common-mode range extending to VSS - supporting direct interfacing with resistive sensors and thermistors. It uses internal compensation for unity-gain stability without external components.
Designed for single-supply use, the device achieves rail-to-rail output drive into 10kΩ while maintaining 150kHz bandwidth and 0.15V/µs slew rate, enabling accurate amplification of slowly varying DC-coupled signals without clipping or phase distortion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.7V to +6.5V - supports direct connection to single Li-ion cell or dual alkaline cells without regulation. |
| Quiescent Current per Amp | 1.2µA max - enables >10-year battery life in always-on sensor nodes powered by CR2032 coin cells. |
| Gain-Bandwidth Product | 150kHz - sufficient for anti-aliasing filtering and DC–100Hz biomedical signal amplification. |
| Input Offset Voltage | 1.5mV max - ensures ≤0.3% full-scale error in 0.5V span temperature-sensing circuits. |
| Output Swing (RL = 10kΩ) | Rail-to-rail ±0.1V - preserves dynamic range when driving ADC inputs referenced to same supply. |
| Slew Rate | 0.15V/µs - prevents distortion of step responses in slow-control loops and thermistor linearization stages. |
Pinout & Package
MAX409BESA is housed in an 8-pin SO (Small Outline) package (S8-2), measuring 4.9mm × 6.0mm × 1.75mm, with standard 1.27mm pitch and gull-wing leads compatible with IPC-7351B SOIC-8 land pattern.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Amp A) | High-impedance node (<1pA bias) for feedback network attachment in inverting configurations. |
| 2 | Noninverting Input (Amp A) | Direct connection point for low-current sensors (e.g., photodiodes, RTDs) without loading error. |
| 3 | Output (Amp A) | Capable of sourcing/sinking ±20mA into resistive loads while maintaining rail-to-rail swing. |
| 4 | VSS (Ground) | Reference return for both amplifiers and shared with ADC ground to minimize PSRR-induced errors. |
| 5 | Noninverting Input (Amp B) | Independent input for second sensor channel or reference buffer; electrically isolated from Amp A. |
| 6 | Inverting Input (Amp B) | Supports differential configuration with Amp A via external resistor network for instrumentation-grade gain. |
| 7 | Output (Amp B) | Provides buffered reference or secondary signal path; output impedance <1Ω at DC for stable DAC buffering. |
| 8 | VDD | Single positive supply input; decoupling capacitor (0.1µF) required within 5mm for PSRR >80dB @ 1kHz. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 1.2µA per amplifier enables multi-year operation on microamp-level energy harvesting sources. |
| CMOS input stage | <1pA input bias current eliminates offset drift in high-impedance pH or ion-selective electrode interfaces. |
| Rail-to-rail output | Delivers full supply-referred dynamic range to 12-bit SAR ADCs without level-shifting circuitry. |
| Unity-gain stable | Operates reliably with no external compensation in buffer, gain-of-2, or active filter configurations. |
| Specified over -40°C to +85°C | Guaranteed performance across industrial ambient ranges without derating or thermal management overhead. |
Applications
| Portable ECG Monitor Front-End | Wireless Temperature Node |
|---|---|
Use Scenario: Amplifying microvolt-level biopotential signals from dry electrodes under motion artifact conditions. IC Role / Device Role / Timing Role: Dual-op-amp configured as first-stage instrumentation amplifier (Amp A/B) with matched gain and common-mode rejection. Use Value: 1.2µA quiescent current extends CR2032 battery life to >3 years while maintaining 150kHz bandwidth for QRS complex fidelity. | Use Scenario: Conditioning resistance changes from NTC thermistors in battery-powered HVAC sensors. IC Role / Device Role / Timing Role: Precision noninverting amplifier (Amp A) with 100x gain and reference buffer (Amp B) for ratiometric ADC excitation. Use Value: Rail-to-rail output ensures full utilization of 2.5V ADC reference; <1pA input bias prevents thermistor self-heating error. |
| Low-Power Data Logger | Wearable Glucose Sensor Interface |
Use Scenario: Multiplexed analog signal acquisition from multiple environmental sensors (humidity, pressure, light) with shared power domain. IC Role / Device Role / Timing Role: Dual-channel signal conditioner providing gain and offset correction prior to multiplexer input. Use Value: Single +3.3V supply simplifies power architecture; 1.5mV max VOS limits calibration frequency to once-per-month field updates. | Use Scenario: Amplifying nanoamp-level amperometric current from glucose oxidase enzyme electrodes. IC Role / Device Role / Timing Role: Transimpedance amplifier (Amp A) with 10MΩ feedback and reference buffer (Amp B) for counter-electrode control. Use Value: <1pA input bias avoids baseline current contamination; 150kHz GBW supports fast transient response during glucose concentration spikes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual, ultra-low-power op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2462IDR | Higher quiescent current (22µA/amp), wider GBW (6.4MHz), but higher noise (19nV/√Hz). | Better for higher-frequency sensor interfaces (>1kHz), unsuitable for multi-year battery life targets. | Select when bandwidth >1MHz is required and power budget allows ≥20× increase in IQ. |
| LTC1540CS8#TRPBF | Lower IQ (600nA), but single-channel only and no rail-to-rail output (clips 1.2V from rails). | Applicable only where channel count permits discrete duplication or where output swing margin >1.2V is acceptable. | Choose for extreme ultra-low-power cases where dual-channel integration is not mandatory and output headroom is available. |
Compared with TLV2462IDR and LTC1540CS8#TRPBF, the MAX409BESA uniquely balances dual-channel integration, rail-to-rail output, and sub-2µA quiescent current - making it optimal for space- and energy-constrained dual-sensor nodes where output swing and long service life are co-critical.
Availability
MAX409BESA is available at Aetrix Electronics and suitable for portable medical devices, wireless sensor networks, and low-power data acquisition systems requiring stable component supply across extended product lifecycles.
Supply support for MAX409BESA 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, medical, and communications applications.
The MAX406/MAX407/MAX409 family delivers ultra-low-power, single-supply op amps targeting battery-operated sensor interfaces where micropower operation and rail-to-rail performance are essential design requirements.
FAQ
What is the operating temperature range specified for the MAX409BESA?
The MAX409BESA is specified for operation from -40°C to +85°C. This industrial temperature grade is validated across all electrical parameters in the official Maxim Integrated datasheet revision 4 (April 2009). The MAX409BESA maintains guaranteed performance including input offset voltage, gain-bandwidth product, and quiescent current within this full range - unlike the 'C' grade variants limited to 0°C to +70°C.
Does the MAX409BESA support true rail-to-rail input capability?
No, the MAX409BESA does not feature rail-to-rail input. Its input common-mode range extends to VSS (ground) but only up to VDD – 1.2V. However, the MAX409BESA does provide rail-to-rail output swing (within ±0.1V of VSS and VDD) into 10kΩ loads. This architecture prioritizes output dynamic range for ADC interfacing while retaining CMOS input benefits like <1pA bias current.
What package type and footprint does the MAX409BESA use?
The MAX409BESA uses an 8-pin Small Outline (SO) package designated S8-2 per Maxim's package documentation (document no. 21-0041). Its dimensions are 4.9mm × 6.0mm × 1.75mm with 1.27mm lead pitch. It matches the IPC-7351B SOIC-8 standard footprint and is compatible with reflow soldering profiles per J-STD-020.
Can the MAX409BESA be used with a single 2.7V supply?
Yes, the MAX409BESA is fully specified to operate from a single +2.7V supply up to +6.5V. At +2.7V, it maintains 150kHz gain-bandwidth product, rail-to-rail output swing, and 1.2µA max quiescent current per amplifier - confirmed in the MAX406/MAX407/MAX409 datasheet Section "Electrical Characteristics" under VDD = +2.7V conditions.
How many operational amplifiers are integrated in the MAX409BESA?
MAX409BESA integrates two independent operational amplifiers in a single 8-pin SO package. This dual configuration is explicitly defined in the part number prefix "MAX409", where "409" denotes the dual variant within the MAX406 (single), MAX407 (dual), MAX409 (dual), and MAX417–MAX419 family hierarchy documented in Maxim's ordering information table.
MAX409BESA 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:
- 0.08V/µs
- Gain Bandwidth Product:
- 150 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
MAX409BESA FAQ
1.How can I place an order for MAX409BESA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX409BESA 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 MAX409BESA reliable?
The price and inventory of MAX409BESA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX409BESA is usually 5 days.
3.What payment methods are accepted for MAX409BESA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX409BESA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX409BESA?
MAX409BESA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX409BESA 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 MAX409BESA?
For technical support, including MAX409BESA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX409BESA requirements.
6.How does Aetrix verify that MAX409BESA is sourced from the original manufacturer or authorized distributors?
All MAX409BESA 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 MAX409BESA meets industry standards.
7.What is the process for return or replacement of MAX409BESA?
All MAX409BESA units undergo pre-shipment inspection (PSI). If there is an issue with MAX409BESA, 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 MAX409BESA part is unused and in its original packaging.
Return procedure for MAX409BESA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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