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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:2,126
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Product details
Overview
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 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 guaranteed low-noise performance across -40°C to +85°C, SO-8 package compatibility with industrial signal conditioning layouts, dual-channel isolation for bridge sensor interfaces, and verified stability driving up to 3900pF capacitive loads in unity-gain configurations.
Technical Context
The MAX412ESA employs a bipolar input stage engineered to minimize voltage noise without compromising DC accuracy or AC stability - achieving 250µV max input offset voltage and 115dB min open-loop gain. Its design omits input current-limiting resistors to preserve noise performance, relying instead on back-to-back clamp diodes for ±0.1V differential input protection.
It supports flexible supply operation from ±2.4V to ±5V, delivers ±3.6V output swing into 2kΩ at ±5V, and maintains 28MHz bandwidth and 4.5V/µs slew rate across its full industrial temperature range. Channel separation exceeds 135dB at 1kHz, enabling precise dual-channel signal processing in tightly coupled analog paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Voltage Noise Density | 2.4nV/√Hz (max) at 1kHz - enables sub-µV-level signal resolution in low-amplitude sensor interfaces |
| Unity-Gain Bandwidth | 28MHz - supports wideband signal acquisition up to ~10MHz with <0.1% gain error |
| Slew Rate | 4.5V/µs - ensures faithful reproduction of fast-rising transients in measurement and audio applications |
| Supply Current | 2.5mA per amplifier - allows dual-channel precision amplification within tight power budgets |
| Input Offset Voltage | 250µV (max) - minimizes DC error in precision DC-coupled gain stages and bridge circuits |
| CMRR | 115dB (min) - rejects common-mode interference in noisy industrial environments |
| Operating Temp Range | -40°C to +85°C - qualified for deployment in industrial control and automotive under-hood auxiliary circuits |
Pinout & Package
MAX412ESA is housed in an 8-pin SO (Small Outline) package, surface-mount compatible with IPC-7351B land patterns. The package provides thermal performance suitable for continuous operation at ambient temperatures up to +85°C with standard PCB copper pour.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN1–) | Inverting input, Channel 1 | Accepts differential input signals; requires matched source impedance for optimal CMRR |
| 2 (IN1+) | Noninverting input, Channel 1 | High-impedance node (40MΩ common-mode resistance); sensitive to PCB leakage currents |
| 3 (OUT1) | Output, Channel 1 | Capable of ±3.6V swing into 2kΩ; stable with ≥3900pF capacitive load in unity-gain configuration |
| 4 (V–) | Negative supply rail | Must be connected directly to ground plane or negative supply; exposed paddle on TDFN variants ties here |
| 5 (V+) | Positive supply rail | Accepts ±2.4V to ±5V; PSRR >96dB ensures immunity to supply ripple |
| 6 (IN2+) | Noninverting input, Channel 2 | Independent high-Z input; channel separation >135dB prevents crosstalk in dual-sensor systems |
| 7 (IN2–) | Inverting input, Channel 2 | Matches Pin 1 electrical behavior; supports identical feedback topologies per channel |
| 8 (OUT2) | Output, Channel 2 | Electrically isolated output stage; enables independent gain/phase tuning per channel |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low voltage noise | 2.4nV/√Hz max at 1kHz - critical for resolving microvolt-level signals from IR detectors and strain gauges |
| Wide supply flexibility | ±2.4V to ±5V operation - supports battery-powered portable instruments and legacy ±5V systems |
| High channel separation | 135dB at 1kHz - preserves signal integrity in dual-channel bridge conditioners and stereo audio preamps |
| Capacitive-load drive capability | Stable with 3900pF in unity-gain - eliminates need for external isolation resistors in many sensor interface designs |
| Industrial temperature rating | -40°C to +85°C - qualified for use in programmable logic controllers and motor drive feedback circuits |
Applications
| Low-Noise Frequency Synthesizers | Infrared Detectors |
|---|---|
Use Scenario: Amplifying low-level IF signals in PLL-based frequency synthesizers where phase noise must be minimized. IC Role / Device Role / Timing Role: Dual-channel op amp configured as low-noise transimpedance and buffer stages for VCO control voltage conditioning. Use Value: 2.4nV/√Hz noise floor prevents degradation of synthesizer phase noise performance below 10kHz offset. |
Use Scenario: Front-end amplification of photocurrent from cooled HgCdTe or InSb infrared detectors. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) with matched dual channels for differential IR pixel readout. Use Value: Bipolar input architecture delivers optimal noise match to low-impedance IR detector outputs (<1kΩ). |
| High-Quality Audio Amplifiers | Bridge Signal Conditioning |
Use Scenario: Microphone preamplifier stage in studio-grade audio interfaces requiring THD+N < -90dB. IC Role / Device Role / Timing Role: Dual-channel, DC-coupled gain block with precision offset nulling for balanced input paths. Use Value: 250µV max offset and 115dB CMRR suppress audible hum and ground-loop artifacts in phantom-powered inputs. |
Use Scenario: Amplifying differential output from Wheatstone bridge sensors (e.g., pressure, load cell) in industrial automation. IC Role / Device Role / Timing Role: Instrumentation amplifier core using two MAX412ESA units per channel for 3-op-amp topology. Use Value: Matched dual channels ensure <0.01% gain error between legs, enabling sub-0.1% full-scale measurement accuracy. |
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, 2.2mA supply current | Better noise at high source impedances (>10kΩ); less suitable for low-Z sensor interfaces due to higher current noise | Select when interfacing high-impedance sources (e.g., piezoelectric sensors) and ultra-wide bandwidth is required |
| LT1028ACN8#PBF | Bipolar-input, 0.85nV/√Hz noise, 50MHz GBW, 10mA supply current, DIP-8 only | Lower noise but higher power and no SO-8 industrial-temp variant; not RoHS-compliant in CN8 package | Select only for lab-grade bench equipment where lowest possible noise dominates over power and packaging constraints |
Compared with OPA211AIDR and LT1028ACN8#PBF, MAX412ESA offers the optimal balance of low voltage noise (2.4nV/√Hz), low power (2.5mA), SO-8 industrial-temperature packaging, and proven stability with capacitive loads - making it uniquely suited for production-grade sensor signal chains.
Availability
MAX412ESA is available at Aetrix Electronics and suitable for industrial instrumentation, infrared sensing, and precision audio applications requiring stable component supply across extended temperature ranges and long production lifecycles.
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 MAX410/MAX412/MAX414 family was designed specifically for precision, low-noise signal conditioning in resource-constrained, wideband systems - targeting applications where noise, speed, and supply flexibility cannot be compromised.
FAQ
What is the maximum capacitive load the MAX412ESA can drive stably in unity-gain configuration?
The MAX412ESA remains stable when driving up to 3900pF in unity-gain voltage-follower configuration, as verified in the Typical Operating Characteristics (Figure 6a/b). For loads exceeding this value, an output isolation resistor (e.g., 10Ω) must be added between the amplifier output and the capacitive load to restore phase margin and prevent oscillation.
Does the MAX412ESA require external input protection diodes?
Yes - the MAX412ESA includes back-to-back clamp diodes but no series current-limiting resistors, so external 200Ω–1kΩ resistors are required if differential input voltages exceed ±0.1V. This preserves its ultra-low-noise performance while enabling safe operation in transient-prone environments like industrial sensor nodes.
What is the guaranteed input offset voltage specification for MAX412ESA over temperature?
The MAX412ESA guarantees a maximum input offset voltage of ±400µV over its full operating temperature range of -40°C to +85°C, as specified in the Electrical Characteristics table for TA = -40°C to +85°C. Its offset voltage tempco is ±1µV/°C, ensuring predictable drift behavior in precision calibration routines.
Can MAX412ESA operate from a single 5V supply?
Yes - the MAX412ESA supports single-supply operation down to 4.8V total supply (e.g., V+ = 5V, V– = GND). However, input common-mode range is limited to V– + 1.5V to V+ – 1.5V, and output swing is reduced to approximately 0.5V to 4.5V with a 2kΩ load, requiring careful level-shifting in DC-coupled designs.
Is the SO-8 package of MAX412ESA pin-compatible with other dual op amps?
The MAX412ESA uses the industry-standard SO-8 pinout for dual op amps (IN1–, IN1+, OUT1, V–, V+, IN2+, IN2–, OUT2), matching pin-for-pin configurations of LM2904, TL072, and OPA234. This enables drop-in replacement in existing layouts where bandwidth, noise, and supply voltage requirements align.
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:
- 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:
- -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.
MAX412ESA Tags
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