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Analog Devices Inc./Maxim Integrated MAX412BCPA
- Part No.:
- MAX412BCPA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX412BCPA.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,150
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Product details
Overview
MAX412BCPA 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 consuming only 2.5mA per amplifier from ±2.4V to ±5V supplies. It is widely used in ultra-low-noise instrumentation amplifiers and infrared detector front-ends.
For engineers reviewing the MAX412BCPA datasheet, MAX412BCPA pinout, MAX412BCPA application, or MAX412BCPA equivalent, key selection criteria include its guaranteed low noise performance across temperature, dual-channel isolation (135dB channel separation), ±250µV max input offset voltage, and compatibility with ±5V and single-supply configurations down to 4.8V total supply.
Technical Context
The MAX412BCPA employs a bipolar input stage engineered for optimal trade-off between voltage noise (dominant below 200Ω source resistance) and current noise (dominant above 3kΩ at 1kHz), enabling precise low-noise gain stages without external noise-compensation networks. Its unity-gain stable architecture supports wideband closed-loop configurations up to 28MHz with minimal phase margin degradation.
Designed for ±5V operation but fully specified from ±2.4V to ±5.25V, the device maintains 7.3VP-P output swing into 2kΩ and exhibits 115dB minimum open-loop voltage gain and 105–121dB CMRR over 0°C to +70°C. Input protection relies on back-to-back clamp diodes without series resistors-preserving noise performance but requiring external current limiting for differential inputs >±1.0V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Voltage Noise Density | 2.4nV/√Hz (max) at 1kHz - enables sub-µV RMS noise in precision sensor interfaces with low-source-impedance transducers. |
| Unity-Gain Bandwidth | 28MHz - supports stable amplification of signals up to ~10MHz with minimal gain peaking in unity-gain follower configurations. |
| Slew Rate | 4.5V/µs - ensures faithful reproduction of 1MHz full-scale sine waves without slew-induced distortion. |
| Input Offset Voltage | ±250µV (max) - allows DC-coupled gain ≥2000 without significant output error in precision instrumentation circuits. |
| Supply Current | 2.5mA per amplifier - enables dual-channel low-noise amplification within tight power budgets in portable test equipment. |
| Common-Mode Rejection | 105dB (min) over 0°C to +70°C - rejects interference from shared ground paths in bridge-based measurement systems. |
| Channel Separation | 135dB at 1kHz - prevents crosstalk between dual channels in stereo audio preamps or dual-sensor signal conditioning. |
Pinout & Package
MAX412BCPA is housed in an 8-pin plastic DIP package (package code P8-1), with exposed pad not applicable. Pin 1 is marked via notch or dot; pin numbering follows standard IC convention (counterclockwise from top-left when notch faces up).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | IN1− | Inverting input of amplifier 1 - connects to feedback network in inverting configurations or reference node in differential setups. |
| 2 | IN1+ | Noninverting input of amplifier 1 - accepts high-impedance sensor signals with minimal loading due to 40MΩ common-mode input resistance. |
| 3 | OUT1 | Output of amplifier 1 - drives 2kΩ loads to ±3.6V with ±5V supplies; stable into ≥3900pF capacitive loads in unity-gain mode. |
| 4 | V− | Negative supply rail - must be connected to system ground or negative rail; TDFN variant requires V− connection to exposed paddle. |
| 5 | V+ | Positive supply rail - accepts ±2.4V to ±5.25V; PSRR of 90–103dB suppresses supply ripple in mixed-signal environments. |
| 6 | IN2+ | Noninverting input of amplifier 2 - electrically isolated from IN1+; enables independent dual-channel signal paths with <0.01% inter-channel coupling. |
| 7 | IN2− | Inverting input of amplifier 2 - symmetric layout with IN1− ensures matched parasitics for balanced differential gain stages. |
| 8 | OUT2 | Output of amplifier 2 - identical AC/DC performance to OUT1; supports independent load driving without shared thermal or supply-path interference. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise bipolar input stage | No series current-limiting resistors - preserves 2.4nV/√Hz noise floor without sacrificing input protection (back-to-back clamps only). |
| Wide supply flexibility | Operates from ±2.4V to ±5.25V - supports legacy ±5V rails and modern low-voltage systems (e.g., ±2.5V) without performance degradation. |
| High channel isolation | 135dB channel separation at 1kHz - eliminates audible crosstalk in dual-channel audio and prevents signal bleed in multi-sensor data acquisition. |
| Capacitive-load stability | Stable driving 3900pF in unity-gain configuration - eliminates need for external compensation in piezoelectric sensor buffers or ADC driver stages. |
| Guaranteed offset voltage | ±250µV max (B-grade) - reduces calibration overhead in factory-trimmed medical instrumentation and industrial weigh scales. |
Applications
| Low-Noise Frequency Synthesizers | Infrared Detectors |
|---|---|
Use Scenario: Amplifying low-level IF signals in PLL-based frequency synthesizers where phase noise directly impacts spectral purity. IC Role / Device Role / Timing Role: Dual op amp configured as low-noise active filter and buffer stage preceding mixer and VCO control path. Use Value: 2.4nV/√Hz noise density minimizes added phase jitter; 28MHz bandwidth preserves loop dynamics without destabilizing PLL response. |
Use Scenario: Conditioning weak photocurrent outputs from cooled HgCdTe or InSb infrared detectors in spectroscopy systems. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) front-end with dual-channel parallel processing for differential IR imaging arrays. Use Value: Low input bias current (±80nA typ) prevents signal loss in high-impedance photodiode nodes; 135dB channel separation avoids thermal image ghosting. |
| High-Quality Audio Amplifiers | Ultra Low-Noise Instrumentation Amplifiers |
Use Scenario: Dual-channel microphone preamplifier in studio-grade audio interfaces requiring THD+N <−90dB at 1kHz. IC Role / Device Role / Timing Role: First-stage gain block with matched dual amplifiers providing symmetrical signal paths for L/R channels. Use Value: ±250µV max offset ensures DC-coupled operation without audible pop; 4.5V/µs slew rate handles transient-rich audio without slew-induced distortion. |
Use Scenario: Building 3-op-amp instrumentation amplifiers for strain gauge and Wheatstone bridge readouts in structural health monitoring. IC Role / Device Role / Timing Role: Dual amplifier implementing precision gain stage and output buffer, sharing common-mode rejection benefits of matched topology. Use Value: 105dB min CMRR over temperature rejects bridge excitation noise; 2.5mA supply current enables battery-powered portable sensors. |
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 but higher 1/f corner (10Hz vs. 90Hz); 4.2mA supply current per amp. | Better for ultra-high-impedance sources (>100kΩ); less suitable for low-Z transducers where MAX412BCPA's bipolar architecture excels. | Select OPA211AIDR when input bias current <1pA is mandatory; choose MAX412BCPA for lowest broadband noise with moderate source impedances. |
| LT1028ACN8#PBF | Higher noise (0.85nV/√Hz) but wider bandwidth (50MHz); ±400µV max offset; 10mA supply current; only available in PDIP. | Preferred in RF/IF gain blocks requiring >30MHz small-signal bandwidth; less optimal for battery-powered precision DC-coupled systems. | Choose LT1028ACN8#PBF for wideband analog front-ends; retain MAX412BCPA for low-power, low-noise DC–10MHz instrumentation where supply current and offset matter most. |
Compared with OPA211AIDR and LT1028ACN8#PBF, the MAX412BCPA uniquely balances sub-2.5nV/√Hz noise, 2.5mA supply current, and ±250µV offset in an industry-standard 8-pin DIP-making it optimal for dual-channel, battery-aware, precision analog signal chains operating below 10MHz.
Availability
MAX412BCPA is available at Aetrix Electronics and suitable for low-noise instrumentation, infrared detection, and high-fidelity audio applications requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for MAX412BCPA 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 markets.
The MAX410/MAX412/MAX414 family was designed specifically for precision, low-noise, wideband amplification in resource-constrained systems-targeting applications where noise, power, and accuracy must coexist without compromise.
FAQ
What is the maximum supply voltage rating for MAX412BCPA?
The absolute maximum supply voltage for MAX412BCPA is ±6V (12V total), but the device is fully specified and guaranteed for operation from ±2.4V to ±5.25V. Operating beyond ±5.25V risks permanent damage and voids parametric guarantees-even if within absolute ratings-due to internal junction stress and accelerated aging.
Does MAX412BCPA require external offset nulling components?
No, MAX412BCPA does not require external offset nulling components. Unlike the single-channel MAX410, the MAX412BCPA lacks dedicated NULL pins. Its ±250µV maximum input offset voltage is trimmed at wafer sort and remains stable over temperature without user adjustment.
Can MAX412BCPA operate from a single 5V supply?
Yes, MAX412BCPA supports single-supply operation with a total supply voltage as low as 4.8V (e.g., V+ = 4.8V, V− = 0V). Input common-mode range extends to within 1.5V of each rail, and output swing reaches within 1.4V of V+ and 1.3V of V− into 2kΩ-enabling rail-to-rail compatible signal conditioning in 5V systems.
What is the channel separation specification for MAX412BCPA?
MAX412BCPA provides 135dB minimum channel separation at 1kHz, measured as 20log(VOUT1/VOUT2) when one amplifier drives a 500Ω load and the other is terminated. This high isolation prevents inter-channel crosstalk in dual-sensor systems and stereo audio paths, verified per Maxim's standard test conditions (VS = ±5V, TA = +25°C).
Is MAX412BCPA RoHS compliant?
Yes, MAX412BCPA is RoHS compliant. The "B" suffix denotes enhanced grade (tighter offset spec), and the "CPA" package code indicates leaded plastic DIP. Maxim's documentation confirms RoHS compliance for all commercial-grade parts manufactured after 2006, including MAX412BCPA, with Pb-free alternatives available under "SA" (SO) or "EPA" (extended temp) suffixes.
MAX412BCPA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MAX412BCPA FAQ
1.How can I place an order for MAX412BCPA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX412BCPA 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 MAX412BCPA reliable?
The price and inventory of MAX412BCPA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX412BCPA is usually 5 days.
3.What payment methods are accepted for MAX412BCPA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX412BCPA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX412BCPA?
MAX412BCPA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX412BCPA 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 MAX412BCPA?
For technical support, including MAX412BCPA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX412BCPA requirements.
6.How does Aetrix verify that MAX412BCPA is sourced from the original manufacturer or authorized distributors?
All MAX412BCPA 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 MAX412BCPA meets industry standards.
7.What is the process for return or replacement of MAX412BCPA?
All MAX412BCPA units undergo pre-shipment inspection (PSI). If there is an issue with MAX412BCPA, 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 MAX412BCPA part is unused and in its original packaging.
Return procedure for MAX412BCPA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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