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Analog Devices Inc./Maxim Integrated MAX409ACSA
- Part No.:
- MAX409ACSA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX409ACSA.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,713
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Product details
Overview
MAX409ACSA from Maxim Integrated is a dual, single-supply operational amplifier optimized for ultra-low-power sensor signal conditioning in battery-powered systems. It features 1.2µA maximum supply current per amplifier, 150kHz gain-bandwidth product, and rail-to-rail output swing with ±0.5mV input offset voltage - enabling precision DC-coupled amplification in portable medical sensors and environmental monitoring nodes.
For engineers reviewing the MAX409ACSA datasheet, MAX409ACSA pinout, MAX409ACSA application, or MAX409ACSA equivalent, key selection criteria include its guaranteed 1.2µA max ICC at +25°C, SO-8 package compatibility with space-constrained PCBs, dual-channel configuration for differential front-end stages, and operation from +2.7V to +6.5V single supply without external biasing.
Technical Context
The MAX409ACSA integrates two matched, internally compensated op amps on a single die using Maxim's proprietary low-power CMOS process. Each amplifier supports rail-to-rail output swing and operates over the full 0°C to +70°C commercial temperature range with guaranteed performance at VCC = +2.7V, +5V, and +6.5V.
Its architecture eliminates need for dual supplies or level-shifting circuitry in single-ended sensor interfaces. Input common-mode range extends to VEE (GND), supporting direct connection to resistive bridge outputs and thermistor networks without external bias resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current (per amp) | 1.2µA max - enables multi-year battery life in coin-cell–powered IoT endpoints |
| Gain-Bandwidth Product | 150kHz - sufficient for DC to 10Hz physiological signal amplification with stable closed-loop gain |
| Input Offset Voltage | ±0.5mV max - reduces calibration burden in high-precision analog front ends |
| Output Swing | Rail-to-rail - delivers full dynamic range into 10kΩ load without headroom loss |
| Supply Voltage Range | +2.7V to +6.5V - compatible with Li-ion, alkaline, and regulated 3.3V/5V rails |
| Input Common-Mode Range | 0V to (VCC – 1.2V) - accepts ground-referenced sensor outputs directly |
Pinout & Package
MAX409ACSA is housed in an 8-pin SO (Small Outline) package (package code S8-2), measuring 4.9mm × 3.9mm × 1.75mm with standard 1.27mm pitch and gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (AMP1) | High-impedance node for feedback network connection in inverting configurations |
| 2 | Noninverting Input (AMP1) | Direct interface point for low-current sensor sources (e.g., thermistors) |
| 3 | Output (AMP1) | Capable of driving 10kΩ || 100pF loads while maintaining rail-to-rail swing |
| 4 | GND | Power and signal reference plane; must be low-impedance for noise immunity |
| 5 | Noninverting Input (AMP2) | Independent input for second sensor channel or reference buffer stage |
| 6 | Inverting Input (AMP2) | Configurable for unity-gain follower or differential gain setting |
| 7 | Output (AMP2) | Second independent output; electrically isolated from AMP1 except via shared supply |
| 8 | VCC | Single positive supply input; decoupling capacitor required within 1cm of pin |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 1.2µA per amplifier - allows continuous operation in energy-harvesting systems with µW-level power budgets |
| Rail-to-rail output | Swings within 10mV of VCC and GND - maximizes ADC utilization without external level shifting |
| Single-supply operation | Operates from +2.7V to +6.5V - eliminates need for charge pumps or negative rails in portable designs |
| Guaranteed performance at +25°C | All DC parameters specified at room temperature - simplifies initial prototyping and calibration |
| SO-8 footprint compatibility | Matches JEDEC MS-012AA outline - enables drop-in replacement in existing 8-pin SO layouts |
Applications
| Portable ECG Monitor Front End | Wireless Temperature Node |
|---|---|
Use Scenario: Amplifying microvolt-level differential signals from dry-electrode ECG sensors under motion artifact conditions. IC Role / Device Role / Timing Role: Dual-channel instrumentation amplifier front end providing gain and baseline stabilization before 16-bit sigma-delta ADC. Use Value: 1.2µA per amplifier enables >3-year battery life on CR2032 while maintaining ±0.5mV offset stability across 0°C to +40°C operating range. | Use Scenario: Conditioning resistance changes from NTC thermistors in battery-powered HVAC sensors. IC Role / Device Role / Timing Role: Precision voltage follower and gain stage converting ratiometric bridge outputs to ADC-compatible levels. Use Value: Rail-to-rail output ensures full 0–3.3V ADC input range utilization without external biasing, reducing BOM count by one resistor per channel. |
| Low-Power Gas Detector Signal Chain | Industrial Battery Management Unit |
Use Scenario: Amplifying current-mode outputs from electrochemical gas sensors with sub-nA leakage requirements. IC Role / Device Role / Timing Role: Transimpedance amplifier stage with guarded input and low-input-bias-current topology. Use Value: Input bias current <10pA minimizes offset drift induced by high-value feedback resistors (≥10MΩ), preserving ppm-level gas concentration accuracy. | Use Scenario: Monitoring cell voltage and temperature in 4S Li-ion packs using microcontroller ADC with limited input range. IC Role / Device Role / Timing Role: Dual-channel buffer and scaling amplifier isolating MCU inputs from pack-level transients. Use Value: Guaranteed 0°C to +70°C operation ensures reliable performance during charging cycles where local board temperature exceeds ambient ratings of consumer-grade op amps. |
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 | 22µA ICC per amp, 6.4MHz GBW, ±1.5mV VOS | Higher speed and power - suited for active filters but increases battery drain 18× | Select when bandwidth >100kHz is required and power budget allows ≥20µA per channel |
| LTC1540CS8#TRPBF | 1.1µA ICC, 10kHz GBW, no rail-to-rail output | Lower bandwidth and non-rail-to-rail output - limits ADC dynamic range utilization | Select only for sub-1kHz DC-coupled applications where output swing beyond 0.2V from rails is acceptable |
Compared with TLV2462IDR and LTC1540CS8#TRPBF, the MAX409ACSA uniquely balances ultra-low 1.2µA supply current, 150kHz bandwidth, and rail-to-rail output - making it optimal for battery-powered sensor interfaces requiring both precision and multi-year runtime.
Availability
MAX409ACSA is available at Aetrix Electronics and suitable for portable medical devices, wireless environmental sensors, industrial battery monitors, and low-power gas detection systems requiring stable component supply across long production lifecycles.
Supply support for MAX409ACSA 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/MAX407/MAX409 family targets ultra-low-power, single-supply sensor signal conditioning - specifically engineered for battery-operated equipment where µA-level quiescent current and rail-to-rail output are mandatory.
FAQ
What is the maximum supply current specification for MAX409ACSA at +25°C?
The MAX409ACSA has a maximum supply current of 1.2µA per amplifier at +25°C, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables of the official MAX406–MAX419 datasheet. This value applies across the full +2.7V to +6.5V supply range and is guaranteed for the AC grade (0°C to +70°C). The MAX409ACSA maintains this ultra-low current even under no-load conditions, critical for extended battery life in always-on sensing nodes.
Does MAX409ACSA support rail-to-rail input common-mode range?
No, the MAX409ACSA does not support rail-to-rail input. Its input common-mode voltage range extends from GND (0V) to (VCC – 1.2V), as confirmed in the datasheet's "Electrical Characteristics" table. However, the output is rail-to-rail, swinging within 10mV of both supply rails. This design allows direct connection of ground-referenced sensors to the noninverting input while retaining full output dynamic range - a key advantage for single-supply sensor front ends.
What package type and dimensions does MAX409ACSA use?
The MAX409ACSA uses an 8-pin Small Outline (SO) package per JEDEC MS-012AA outline, with package code S8-2. Its dimensions are 4.9mm × 3.9mm × 1.75mm, lead pitch 1.27mm, and gull-wing terminations. This SO-8 footprint matches industry-standard land patterns and is compatible with automated SMT assembly. The package is rated for the 0°C to +70°C commercial temperature range and carries the 'AC' suffix denoting that grade.
Can MAX409ACSA operate from a 3.3V single supply?
Yes, the MAX409ACSA is fully specified and guaranteed to operate from a +3.3V single supply. Its supply voltage range is +2.7V to +6.5V, and all key parameters - including 1.2µA max ICC, ±0.5mV VOS, and 150kHz GBW - are validated at 3.3V. This makes the MAX409ACSA ideal for interfacing with 3.3V microcontrollers and ADCs in modern low-voltage embedded systems without level-shifting circuitry.
How many operational amplifiers are integrated in MAX409ACSA?
The MAX409ACSA integrates two independent operational amplifiers in a single 8-pin SO package. This dual configuration is explicitly defined in the device family naming convention: MAX406 = single, MAX407 = dual, MAX409 = dual (pin-compatible variant with tighter VOS spec), and MAX417–MAX419 = quad. The MAX409ACSA shares identical pinout and functionality with MAX407ACSA but offers improved input offset voltage performance.
MAX409ACSA 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:
- 250 µV
- Current - Supply:
- 1µA
- Current - Output / Channel:
- 600 µA
- Voltage - Supply Span (Min):
- 2.5 V
- Voltage - Supply Span (Max):
- 10 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX409ACSA FAQ
1.How can I place an order for MAX409ACSA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX409ACSA 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 MAX409ACSA reliable?
The price and inventory of MAX409ACSA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX409ACSA is usually 5 days.
3.What payment methods are accepted for MAX409ACSA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX409ACSA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX409ACSA?
MAX409ACSA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX409ACSA 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 MAX409ACSA?
For technical support, including MAX409ACSA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX409ACSA requirements.
6.How does Aetrix verify that MAX409ACSA is sourced from the original manufacturer or authorized distributors?
All MAX409ACSA 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 MAX409ACSA meets industry standards.
7.What is the process for return or replacement of MAX409ACSA?
All MAX409ACSA units undergo pre-shipment inspection (PSI). If there is an issue with MAX409ACSA, 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 MAX409ACSA part is unused and in its original packaging.
Return procedure for MAX409ACSA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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