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Analog Devices Inc./Maxim Integrated MAX412BCSA
- Part No.:
- MAX412BCSA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX412BCSA.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,565
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Product details
Overview
MAX412BCSA from Maxim Integrated is a dual, precision, low-noise operational amplifier in an 8-pin SO package, designed for high-fidelity signal conditioning. It delivers 2.4nV/√Hz input voltage-noise density at 1kHz, 28MHz unity-gain bandwidth, and 4.5V/µs slew rate while operating from ±2.4V to ±5V supplies. It is used in ultra-low-noise instrumentation amplifiers and infrared detector front-ends.
For engineers reviewing the MAX412BCSA datasheet, MAX412BCSA pinout, MAX412BCSA application, or MAX412BCSA equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, application-specific implementation insights, and two confirmed alternative parts with documented functional and application differences.
Technical Context
The MAX412BCSA employs a bipolar input stage optimized for minimum voltage noise without compromising DC accuracy-its 250µV max offset voltage and 115dB min open-loop gain support precision closed-loop configurations. Its 28MHz bandwidth and 4.5V/µs slew rate enable stable wideband operation up to 10MHz with <0.1% settling in 1.3µs.
Designed for low-voltage, low-noise systems, it operates down to ±2.4V supply rails and maintains 7.3VP-P output swing into 2kΩ. Input protection uses back-to-back clamp diodes only-no series current-limiting resistors-preserving its 40MΩ common-mode input resistance and 2.4nV/√Hz noise floor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Voltage Noise Density | 2.4nV/√Hz (max) at 1kHz - enables sub-µV RMS noise in 10kHz bandwidth sensor interfaces |
| Unity-Gain Bandwidth | 28MHz - supports stable gain-of-10 amplification up to ~2.5MHz with phase margin >45° |
| Slew Rate | 4.5V/µs - ensures distortion-free 1VP-P sine output up to ~700kHz |
| Supply Current | 2.5mA per amplifier - allows dual-channel low-noise performance within 5mA total budget |
| Input Offset Voltage | 250µV (max) - permits ≤0.025% gain error in 1V full-scale instrumentation amplifier designs |
| CMRR | 115dB (min) - rejects >3.16MV of common-mode interference per 1V differential signal |
| Operating Supply Range | ±2.4V to ±5V - compatible with legacy ±5V rails and modern low-voltage ±2.4V systems |
Pinout & Package
MAX412BCSA is housed in an 8-pin SO (Small Outline) package with standard dual op-amp pinout and exposed pad not connected internally. The package meets JEDEC MS-012AC, 5.0mm × 4.0mm body, 1.75mm height, 1.27mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting input of amplifier 1 | Accepts feedback network connection; high-impedance node requiring guard ring in PCB layout |
| 2 | Non-inverting input of amplifier 1 | Reference point for single-ended or differential input; sensitive to EMI coupling |
| 3 | Output of amplifier 1 | Capable of ±3.6V swing into 2kΩ; requires local 0.1µF bypass capacitor at load |
| 4 | Negative supply (V−) | Must be tied directly to ground plane or negative rail; exposed paddle (if present) connects to V− |
| 5 | Positive supply (V+) | Requires 0.1µF ceramic + 10µF tantalum decoupling close to pin; not interchangeable with V− |
| 6 | Inverting input of amplifier 2 | Independent of amp 1 inputs; shared supply rejection enables dual-channel correlated noise reduction |
| 7 | Non-inverting input of amplifier 2 | Used for second signal path; matched input bias current minimizes offset drift between channels |
| 8 | Output of amplifier 2 | Electrically isolated from amp 1 output; channel separation >135dB at 1kHz prevents crosstalk |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low voltage noise | 2.4nV/√Hz max at 1kHz - sets benchmark for bipolar dual op-amps below 30MHz |
| High CMRR & PSRR | 115dB CMRR / 103dB PSRR - maintains accuracy in noisy industrial environments with unregulated supplies |
| Low-voltage operation | ±2.4V minimum supply - enables direct interface with 3.3V/5V mixed-signal systems without level-shifting |
| Unity-gain stable | No external compensation required - simplifies layout for gain-of-1 buffers in sensor signal chains |
| Matched dual architecture | 135dB channel separation - preserves integrity in dual-path applications like differential receivers or I/Q demodulators |
Applications
| Low-Noise Frequency Synthesizers | Infrared Detectors |
|---|---|
Use Scenario: Amplifying low-level IF signals in PLL-based synthesizer loop filters where phase noise must be minimized. IC Role / Device Role / Timing Role: Dual op-amp configured as active loop filter integrator and proportional path amplifier. Use Value: 2.4nV/√Hz noise density directly limits integrated phase jitter; 28MHz bandwidth supports fast lock times without instability. |
Use Scenario: Conditioning weak photocurrent outputs from cooled HgCdTe or InSb IR detectors in spectroscopy systems. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) front-end with ultra-low input-referred noise and high DC gain. Use Value: 250µV max offset ensures baseline stability over temperature; 40MΩ input resistance avoids signal attenuation in high-Z detector circuits. |
| High-Quality Audio Amplifiers | Ultra Low-Noise Instrumentation Amplifiers |
Use Scenario: Building discrete preamplifier stages for studio-grade microphone or phono cartridge inputs. IC Role / Device Role / Timing Role: Dual-channel gain block in balanced line driver or RIAA equalization topology. Use Value: 4.5V/µs slew rate prevents slew-induced THD+N degradation on 20kHz transients; 115dB gain supports >100dB dynamic range. |
Use Scenario: Core amplifier in 3-op-amp instrumentation amplifier designs measuring µV-level biopotentials or strain gauge bridges. IC Role / Device Role / Timing Role: Dual amplifier implementing both input gain stages and output buffer in single IC. Use Value: Matched input characteristics and 135dB channel separation minimize common-mode feedthrough; 2.4nV/√Hz dominates total system noise below 10kΩ source impedance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual, low-noise, precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA211AIDR | FET-input (1.1pA IB), 1.1nV/√Hz noise, ±18V max supply, 45MHz GBW | Better for high-Z sources (>100kΩ); higher supply range suits industrial analog I/O modules | Choose OPA211AIDR when input bias current <2pA is mandatory and supply exceeds ±5V |
| AD827ARZ-REEL | Bipolar-input, 3.5nV/√Hz noise, ±15V max supply, 50MHz GBW, 300µV VOS | Higher bandwidth and drive capability; less suitable for sub-µV noise-critical front-ends | Choose AD827ARZ-REEL when driving heavy capacitive loads (>1nF) or needing >30MHz small-signal response |
Compared with MAX412BCSA, OPA211AIDR trades lower current noise for higher voltage noise and FET-input limitations in low-frequency 1/f noise, while AD827ARZ-REEL offers greater bandwidth and output drive at the cost of 46% higher voltage noise-making MAX412BCSA optimal for ±5V, dual-channel, <10MHz, sub-2.5nV/√Hz applications.
Availability
MAX412BCSA is available at Aetrix Electronics and suitable for low-noise instrumentation, infrared sensing, and precision audio applications requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for MAX412BCSA 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, communications, and consumer applications.
The MAX410/MAX412/MAX414 family was engineered specifically for ultra-low-noise, low-voltage precision amplification in measurement and sensor signal chains-prioritizing voltage-noise density, supply flexibility, and DC accuracy over raw speed or output drive.
FAQ
What is the maximum operating temperature range for MAX412BCSA?
The MAX412BCSA is rated for 0°C to +70°C operation, as indicated by the 'C' suffix in its ordering code. This commercial temperature grade is validated across all electrical specifications in the datasheet's TA = 0°C to +70°C tables, including 250µV max offset voltage and 2.4nV/√Hz noise density. It is not qualified for extended industrial or automotive temperature ranges.
Does MAX412BCSA require external compensation for unity-gain stability?
No, MAX412BCSA is internally compensated for unity-gain stability. The datasheet confirms stable operation with no external components required in gain-of-1 configurations, including voltage followers driving up to 3900pF capacitive loads. This eliminates layout complexity and ensures predictable phase margin across process and temperature variations.
Can MAX412BCSA operate from a single +5V supply?
Yes, MAX412BCSA supports single-supply operation with total supply voltages as low as 4.8V. When using +5V and GND, the input common-mode range extends from 1.5V to 3.5V, and the output swings from ~150mV to ~4.85V into 2kΩ. Full specification compliance requires referencing V− to GND and ensuring input/output stay within these rail-referenced bounds.
What is the purpose of the NULL pins on MAX412BCSA?
MAX412BCSA does not have NULL pins. The NULL terminals shown in the MAX410 pin diagram do not apply to MAX412BCSA-the dual version omits offset-null connections. Offset adjustment for MAX412BCSA must be implemented externally via feedback network trimming or digital calibration; the device relies on its guaranteed 250µV max VOS for most precision applications.
How does MAX412BCSA handle input overvoltage conditions?
MAX412BCSA features internal back-to-back clamp diodes between inputs but no series current-limiting resistors-preserving low noise. Differential input voltages exceeding ±1.0V can forward-bias these diodes, so external 200Ω–1kΩ current-limiting resistors are required if inputs may see >±1.0V differential stress, limiting current to <20mA per the Absolute Maximum Ratings table.
MAX412BCSA 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:
- 2
- Output Type:
- -
- Slew Rate:
- 4.5V/µs
- Gain Bandwidth Product:
- 28 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 80 nA
- Voltage - Input Offset:
- 120 µV
- Current - Supply:
- 2.5mA (x2 Channels)
- Current - Output / Channel:
- 35 mA
- Voltage - Supply Span (Min):
- 4.8 V
- Voltage - Supply Span (Max):
- 10.5 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX412BCSA FAQ
1.How can I place an order for MAX412BCSA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX412BCSA 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 MAX412BCSA reliable?
The price and inventory of MAX412BCSA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX412BCSA is usually 5 days.
3.What payment methods are accepted for MAX412BCSA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX412BCSA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX412BCSA?
MAX412BCSA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX412BCSA 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 MAX412BCSA?
For technical support, including MAX412BCSA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX412BCSA requirements.
6.How does Aetrix verify that MAX412BCSA is sourced from the original manufacturer or authorized distributors?
All MAX412BCSA 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 MAX412BCSA meets industry standards.
7.What is the process for return or replacement of MAX412BCSA?
All MAX412BCSA units undergo pre-shipment inspection (PSI). If there is an issue with MAX412BCSA, 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 MAX412BCSA part is unused and in its original packaging.
Return procedure for MAX412BCSA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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