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Analog Devices Inc./Maxim Integrated MAX412ESA+
- Part No.:
- MAX412ESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX412ESA+.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:148
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Product details
Overview
The MAX412ESA+ from Maxim Integrated is a dual, precision, low-noise operational amplifier optimized for high-speed, low-voltage systems. 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 and consuming only 2.5mA per amplifier. It is widely used in ultra-low-noise instrumentation amplifiers and infrared detector front-ends.
For engineers reviewing the MAX412ESA+ datasheet, MAX412ESA+ pinout, MAX412ESA+ application, or MAX412ESA+ equivalent, key selection criteria include its guaranteed low noise performance across temperature, rail-to-rail output swing into 2kΩ, and SO-8 package compatibility with industrial-grade (-40°C to +85°C) operation.
Technical Context
The MAX412ESA+ employs a bipolar input stage engineered to minimize voltage noise without compromising DC accuracy or AC stability - achieving 250µV max offset voltage and 115dB min open-loop gain. Its design avoids input current-limiting resistors to preserve noise performance, relying instead on back-to-back clamp diodes for ±0.1V differential input protection.
It supports stable unity-gain operation with 28MHz bandwidth and maintains ≤1.3µs settling time to 0.1%. The device is specified for operation across ±2.4V to ±5V supplies and delivers ±3.6V output swing into 2kΩ at ±5V, enabling use in both split-supply and low-voltage single-supply configurations (≥4.8V total).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Voltage Noise Density | 2.4nV/√Hz (max) at 1kHz - enables sub-µV-level signal integrity in precision sensor interfaces |
| Unity-Gain Bandwidth | 28MHz - supports wideband signal conditioning up to ~10MHz closed-loop |
| Slew Rate | 4.5V/µs - ensures faithful reproduction of fast transients in measurement systems |
| Supply Current | 2.5mA per amplifier - balances low-power operation with high-speed performance |
| Input Offset Voltage | 250µV (max) - reduces DC error in high-gain, low-level amplification stages |
| CMRR | 115dB (min) - rejects common-mode interference in bridge and differential sensor circuits |
| Operating Temp Range | -40°C to +85°C - qualified for industrial and embedded environmental conditions |
Pinout & Package
MAX412ESA+ is housed in an 8-pin SO (Small Outline) package, RoHS-compliant, with standard dual op amp pinout compatible with industry layouts. Thermal pad is not present (SO, not TDFN-EP).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT1 | Inverting amplifier output - drives feedback network or load directly |
| 2 | IN1− | Inverting input - accepts feedback signal or inverted input path |
| 3 | IN1+ | Noninverting input - connects to reference, sensor, or signal source |
| 4 | V− | Negative supply rail - must be connected to system ground or negative bias |
| 5 | IN2+ | Noninverting input (Channel 2) - independent signal path for dual-channel operation |
| 6 | IN2− | Inverting input (Channel 2) - supports independent feedback configuration per channel |
| 7 | OUT2 | Output (Channel 2) - fully isolated output stage for second amplifier |
| 8 | V+ | Positive supply rail - powers both amplifiers; supports ±2.4V to ±5V operation |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise bipolar architecture | Optimized collector current in input stage achieves 2.4nV/√Hz without added resistor noise |
| Unity-gain stable wideband response | 28MHz GBW with 4.5V/µs slew rate enables accurate amplification of signals up to 10MHz |
| Industrial temperature grade | Specified over -40°C to +85°C with guaranteed 250µV VOS and 115dB CMRR |
| Flexible supply range | Operates from ±2.4V to ±5V - supports battery-powered and low-voltage industrial rails |
| High output drive capability | Delivers ±3.6V swing into 2kΩ and 35mA short-circuit current - suitable for driving ADC drivers and active filters |
Applications
| Low-Noise Frequency Synthesizers | Infrared Detectors |
|---|---|
Use Scenario: Amplifying low-amplitude IF signals in PLL-based synthesizer loop filters and VCO control paths. IC Role / Device Role / Timing Role: Precision buffer and integrator in charge-pump feedback loops requiring minimal voltage noise and drift. Use Value: 2.4nV/√Hz noise floor preserves phase noise integrity; 115dB CMRR suppresses supply-coupled jitter. |
Use Scenario: Front-end amplification of weak photocurrent signals from cooled or uncooled IR photodiodes. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) stage with low input bias current (±80nA typ) and ultra-low voltage noise. Use Value: Enables detection of sub-nA photocurrents; 250µV max VOS minimizes baseline drift in DC-coupled IR imaging chains. |
| High-Quality Audio Amplifiers | Bridge Signal Conditioning |
Use Scenario: Pre-amplification and active filtering in professional audio ADC input stages and microphone preamps. IC Role / Device Role / Timing Role: Low-distortion, low-noise gain block with THD+N < -94dB at 1kHz and 7VP-P output swing. Use Value: Preserves dynamic range in 24-bit audio systems; 4.5V/µs slew rate prevents slew-induced distortion on transients. |
Use Scenario: Amplifying differential outputs from Wheatstone bridge strain gauges and pressure sensors. IC Role / Device Role / Timing Role: Dual-channel instrumentation amplifier core (with external gain resistors) rejecting common-mode bridge excitation noise. Use Value: 115dB CMRR and 28MHz bandwidth enable high-resolution, high-speed bridge readout with >100dB SNR. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual low-noise op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA211AIDR | FET-input (vs. bipolar), 1.1nV/√Hz noise, 45MHz GBW, higher supply current (3.6mA) | Better for high-Z sources (>100kΩ); less optimal for low-source-impedance, low-noise applications | Choose OPA211AIDR when ultra-low current noise dominates design; MAX412ESA+ preferred for <200Ω source impedances |
| ADA4898-2ARMZ | Higher speed (210MHz GBW), lower noise (1.0nV/√Hz), but requires ≥±5V supply and consumes 10.5mA | Targeted at high-frequency instrumentation; over-specified for DC–10MHz low-noise applications | Select ADA4898-2ARMZ only if bandwidth >50MHz is required; MAX412ESA+ offers better power/noise trade-off below 30MHz |
Compared with OPA211AIDR and ADA4898-2ARMZ, the MAX412ESA+ provides the optimal balance of ultra-low voltage noise, moderate bandwidth, low supply current, and industrial temperature rating - making it uniquely suited for cost-sensitive, power-constrained, precision analog front-ends where source impedance is low and bandwidth requirements are ≤28MHz.
Availability
MAX412ESA+ is available at Aetrix Electronics and suitable for low-noise instrumentation, infrared sensing, and high-fidelity audio applications requiring stable component supply and long-term industrial-grade availability.
Supply support for MAX412ESA+ 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 MAX412ESA+ belongs to Maxim's precision op amp product line, designed specifically for applications demanding ultra-low voltage noise, wide bandwidth, and robust DC accuracy in space- and power-constrained environments.
FAQ
What is the maximum supply voltage for MAX412ESA+?
The MAX412ESA+ has an absolute maximum supply voltage of ±6V (12V total), but its specified operating range is ±2.4V to ±5V. Operation beyond ±5V is not guaranteed and may degrade parametric performance or reliability. For designs using ±5V rails, the MAX412ESA+ delivers full-spec performance including 28MHz bandwidth and 2.4nV/√Hz noise.
Does MAX412ESA+ require external offset nulling?
No, the MAX412ESA+ does not include internal offset null pins and is not designed for external nulling. Its input offset voltage is trimmed during production and guaranteed to ≤250µV over temperature. Unlike the single-channel MAX410, the MAX412ESA+ lacks NULL pins - offset correction must be implemented digitally or via external circuitry if tighter DC accuracy is required.
Can MAX412ESA+ drive capacitive loads?
Yes, the MAX412ESA+ remains stable driving up to 3900pF in unity-gain voltage-follower configuration. For larger capacitive loads, an isolation resistor (e.g., 10Ω) must be placed in series with the output. This technique restores phase margin without degrading DC accuracy when combined with feedback around the resistor, as verified in Maxim's typical operating characteristics.
Is MAX412ESA+ pin-compatible with other SO-8 dual op amps?
The MAX412ESA+ uses the industry-standard SO-8 dual op amp pinout (pin 1 = OUT1, pin 2 = IN1−, pin 3 = IN1+, pin 4 = V−, pin 5 = IN2+, pin 6 = IN2−, pin 7 = OUT2, pin 8 = V+). It is pin-compatible with LM258, TL082, and AD822 in basic connections, though electrical performance (noise, bandwidth, supply range) differs significantly - direct substitution requires validation of signal chain requirements.
What is the input protection scheme of MAX412ESA+?
The MAX412ESA+ features back-to-back silicon diodes between inputs for ±0.1V differential overvoltage protection. It omits input current-limiting resistors to preserve low-noise performance. If differential input voltages exceed ±1.0V, external series resistors must be added to limit current to <20mA - otherwise, permanent damage may occur per Absolute Maximum Ratings.
MAX412ESA+ 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:
- Active
- 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:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX412ESA+ FAQ
1.How can I place an order for MAX412ESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX412ESA+ 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 MAX412ESA+ reliable?
The price and inventory of MAX412ESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX412ESA+ is usually 5 days.
3.What payment methods are accepted for MAX412ESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX412ESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX412ESA+?
MAX412ESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX412ESA+ 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 MAX412ESA+?
For technical support, including MAX412ESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX412ESA+ requirements.
6.How does Aetrix verify that MAX412ESA+ is sourced from the original manufacturer or authorized distributors?
All MAX412ESA+ 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 MAX412ESA+ meets industry standards.
7.What is the process for return or replacement of MAX412ESA+?
All MAX412ESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX412ESA+, 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 MAX412ESA+ part is unused and in its original packaging.
Return procedure for MAX412ESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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