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Analog Devices Inc./Maxim Integrated MAX412BCSA+T
- Part No.:
- MAX412BCSA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX412BCSA+T.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,033
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Product details
Overview
MAX412BCSA+T 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 MAX412BCSA+T datasheet, MAX412BCSA+T pinout, MAX412BCSA+T application, or MAX412BCSA+T equivalent, this page provides verified specifications, package mapping, real-world use scenarios, and validated alternative options - all confirmed against Maxim's official documentation for the exact part number MAX412BCSA+T.
Technical Context
The MAX412BCSA+T employs a bipolar input stage engineered to minimize voltage noise without compromising DC accuracy or AC stability. Its design avoids input current-limiting resistors - unlike many op amps - to preserve low-noise performance, relying instead on back-to-back clamp diodes for ±0.1V differential input protection.
It achieves unity-gain stability with 28MHz bandwidth and 4.5V/µs slew rate across its full operating temperature range (–40°C to +85°C), and supports capacitive-load driving up to 3900pF in voltage-follower configurations without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Noise | 2.4nV/√Hz max at 1kHz - enables sub-µV signal resolution in precision sensor interfaces. |
| Unity-Gain Bandwidth | 28MHz - supports wideband signal conditioning up to ~10MHz with <1% gain error. |
| Slew Rate | 4.5V/µs - ensures faithful reproduction of fast-rising pulses (e.g., 1V step in <225ns). |
| Supply Current | 2.5mA per amplifier - allows dual-channel operation under 5.1mA total, suitable for low-power instrumentation. |
| Input Offset Voltage | ±250µV max - supports DC-coupled gain stages requiring <0.1% offset-induced error at 100× gain. |
| CMRR | 115dB min - rejects common-mode interference in bridge-based transducer circuits. |
| Operating Supply Range | ±2.4V to ±5V - enables flexible biasing in mixed-signal systems with constrained rail voltages. |
Pinout & Package
MAX412BCSA+T is housed in an 8-pin SO (Small Outline) package with standard dual op amp pinout. The exposed pad variant is not used in this part; the SO package has no thermal pad connection requirement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Amp 1) | High-impedance node for feedback network connection; referenced to V– for common-mode rejection. |
| 2 | Noninverting Input (Amp 1) | Accepts low-level sensor signals; input protection limited to ±0.1V differential. |
| 3 | Output (Amp 1) | Capable of ±3.6V swing into 2kΩ; stable with ≥3900pF capacitive loads in unity-gain configuration. |
| 4 | V– | Negative supply rail; internal bias generation reference; must be connected for proper quiescent operation. |
| 5 | V+ | Positive supply rail; supports asymmetric supplies (e.g., +5V/–2.4V) within ±2.4V to ±5V total range. |
| 6 | Noninverting Input (Amp 2) | Independent channel input; identical electrical specs to Pin 2; enables dual-channel signal processing. |
| 7 | Inverting Input (Amp 2) | Matches Pin 1 functionality; supports independent feedback networks per channel. |
| 8 | Output (Amp 2) | Electrically isolated from Output 1; channel separation >135dB at 1kHz minimizes crosstalk. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low voltage noise | 2.4nV/√Hz max at 1kHz - critical for detecting microvolt-level signals from IR detectors or strain gauges. |
| Bipolar input architecture | No input current-limiting resistors - preserves noise floor but requires external series resistors if differential inputs exceed ±0.1V. |
| Wide supply flexibility | Operates from ±2.4V to ±5V - accommodates legacy ±3V or modern ±2.5V rails without performance degradation. |
| High channel separation | 135dB at 1kHz - maintains signal integrity in dual-channel applications like stereo audio preamps or differential ADC drivers. |
| Capacitive-load tolerance | Stable with 3900pF in unity-gain - eliminates need for isolation resistors in many sensor buffer designs. |
Applications
| Low-Noise Frequency Synthesizers | Infrared Detectors |
|---|---|
Use Scenario: Amplifying low-amplitude, high-frequency phase-error signals in PLL-based synthesizer loops. IC Role / Device Role / Timing Role: Dual-channel voltage amplifier providing matched gain and phase response for I/Q path conditioning. Use Value: 28MHz bandwidth and 4.5V/µs slew rate enable accurate tracking of fast phase transients without distortion. |
Use Scenario: Front-end amplification of weak photocurrents from cooled HgCdTe or InSb infrared detectors. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) input stage with ultra-low voltage noise to maximize SNR. Use Value: 2.4nV/√Hz noise density directly improves detectivity (D*) by reducing input-referred noise floor below 10nV/√Hz. |
| High-Quality Audio Amplifiers | Bridge Signal Conditioning |
Use Scenario: Dual-channel line-level preamplifier in studio-grade audio equipment with DC-coupled topology. IC Role / Device Role / Timing Role: Precision dual op amp implementing balanced gain stages with minimal THD+N. Use Value: ±250µV max offset and 115dB CMRR suppress audible hum and crosstalk in differential audio paths. |
Use Scenario: Amplifying differential output from Wheatstone bridge sensors (e.g., pressure, load cell) in industrial measurement. IC Role / Device Role / Timing Role: Instrumentation amplifier front-end using one half of MAX412BCSA+T for each input leg. Use Value: Matched channel specs ensure common-mode rejection remains >105dB over temperature, improving measurement linearity. |
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 | Lower noise (1.1nV/√Hz), higher supply current (3.6mA), JFET input (higher ZIN, lower IB). | Better for high-Z sources (>100kΩ); less optimal for low-source-impedance, ultra-low-noise applications where bipolar noise dominates. | Choose OPA211AIDR when input bias current <10pA is required and supply headroom permits higher current draw. |
| AD8620ARZ | Higher noise (2.7nV/√Hz), wider bandwidth (25MHz), rail-to-rail output, lower offset drift (0.2µV/°C). | Preferred for single-supply systems or where output swing to rails is essential; trades 0.3nV/√Hz noise for broader voltage compliance. | Choose AD8620ARZ when operating from +5V/0V or needing rail-to-rail output swing, accepting modest noise penalty. |
Compared with MAX412BCSA+T, OPA211AIDR offers superior noise and input impedance but increases power by 44%; AD8620ARZ sacrifices 0.3nV/√Hz noise for rail-to-rail output and single-supply compatibility - making MAX412BCSA+T the optimal choice for ±2.4V–±5V dual-supply, low-noise, bipolar-input applications.
Availability
MAX412BCSA+T is available at Aetrix Electronics and suitable for low-noise instrumentation, infrared detection, and precision analog signal conditioning requiring stable component supply across industrial temperature ranges.
Supply support for MAX412BCSA+T 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 fabless semiconductor company specializing in high-performance analog and mixed-signal ICs for precision, power, and interface applications.
The MAX410/MAX412/MAX414 family was designed specifically for low-noise, high-speed signal conditioning in measurement and sensor systems where voltage noise, bandwidth, and supply flexibility are critical.
FAQ
What is the operating temperature range for MAX412BCSA+T?
The MAX412BCSA+T is rated for operation from –40°C to +85°C. This extended industrial temperature range is confirmed in Maxim's official ordering information table, where the "B" grade suffix denotes the –40°C to +85°C specification, and "CSA" confirms the 8-pin SO package. All electrical characteristics in the datasheet's –40°C to +85°C section apply directly to MAX412BCSA+T.
Does MAX412BCSA+T have an exposed thermal pad?
No, MAX412BCSA+T does not include an exposed thermal pad. The "CSA" package code refers to the standard 8-pin SO (Small Outline) package without an exposed paddle. Exposed-pad variants (e.g., TDFN-EP) are designated separately (e.g., "ETA") and are not applicable to MAX412BCSA+T. Thermal dissipation relies solely on the leads and package body.
Can MAX412BCSA+T operate from a single +5V supply?
Yes, MAX412BCSA+T can operate from a single +5V supply, though it is optimized for split supplies. The datasheet confirms functionality down to total supply voltages as low as 4.8V. With +5V/0V, the input common-mode range is limited to 1.5V–3.5V and output swing to ~0.8V–4.2V into 2kΩ, preserving usability in single-supply sensor interfaces where rail headroom permits.
What is the maximum capacitive load MAX412BCSA+T can drive stably in unity-gain configuration?
MAX412BCSA+T remains unity-gain stable with capacitive loads up to 3900pF, as verified in the "Capacitive-Load Driving" section and Figure 6a/b of the datasheet. This capability eliminates the need for external isolation resistors in many buffer applications - such as driving long PCB traces or piezoelectric sensor cables - provided the closed-loop gain is ≥1 and layout parasitics are controlled.
Is MAX412BCSA+T pin-compatible with other MAX412 variants like MAX412CSA?
Yes, MAX412BCSA+T is fully pin-compatible with MAX412CSA and all other 8-pin SO-packaged MAX412 variants (e.g., MAX412EPA, MAX412ESA). The "B" suffix indicates tighter initial offset voltage (±250µV max vs. ±350µV for "C"), but both share identical pinout, footprint, and electrical interface - enabling drop-in replacement where enhanced DC precision is required without layout changes.
MAX412BCSA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX412BCSA+T FAQ
1.How can I place an order for MAX412BCSA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX412BCSA+T 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+T reliable?
The price and inventory of MAX412BCSA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX412BCSA+T is usually 5 days.
3.What payment methods are accepted for MAX412BCSA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX412BCSA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX412BCSA+T?
MAX412BCSA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX412BCSA+T 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+T?
For technical support, including MAX412BCSA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX412BCSA+T requirements.
6.How does Aetrix verify that MAX412BCSA+T is sourced from the original manufacturer or authorized distributors?
All MAX412BCSA+T 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+T meets industry standards.
7.What is the process for return or replacement of MAX412BCSA+T?
All MAX412BCSA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX412BCSA+T, 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+T part is unused and in its original packaging.
Return procedure for MAX412BCSA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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