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Analog Devices Inc./Maxim Integrated MAX44267AUD+
- Part No.:
- MAX44267AUD+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MAX44267AUD+.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,718
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Product details
Overview
The MAX44267AUD+ from Maxim Integrated is a precision dual operational amplifier with integrated charge-pump negative rail generation, enabling true-zero output swing and ±10V output range from a single +4.5V to +15V supply. It delivers 50μV max input offset voltage, 0.4µV/°C max drift, and 9nV/√Hz input voltage noise at 1kHz-optimized for high-accuracy sensor interfaces and PLC analog I/O modules.
For engineers reviewing the MAX44267AUD+ datasheet, MAX44267AUD+ pinout, MAX44267AUD+ application, or MAX44267AUD+ equivalent, this page provides verified specifications, validated pin functions, real-world use cases in bridge sensor conditioning, and confirmed alternative options for bipolar-output single-supply op amp designs.
Technical Context
The MAX44267AUD+ employs a proprietary combination of auto-zeroing and chopper-stabilization to achieve sub-50µV offset and ultra-low 1/f noise while maintaining 5MHz gain-bandwidth and 3V/µs slew rate. Its internal charge pump generates a shared VSS rail (−13V typical at VDD = 15V) using external CFLY, CHOLD, and CFILT capacitors-eliminating need for an external negative supply.
This architecture supports rail-to-rail input common-mode range from −12V to +13.5V (at VDD = 15V), true-zero output crossing, and low 2.4mA max quiescent current. The device is unity-gain stable and features integrated EMI filtering to suppress RF interference from motors and switching sources.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 5MHz - enables stable closed-loop operation up to ~100kHz at G = 100, suitable for precision signal conditioning before ADC sampling. |
| Input Offset Voltage (max) | 50µV - ensures ≤0.05mV error in 1V full-scale bridge sensor outputs, critical for <0.1% accuracy systems. |
| Offset Drift (max) | 0.4µV/°C - contributes <0.5mV total drift over −40°C to +125°C, supporting uncalibrated industrial temperature ranges. |
| Input Voltage Noise (0.1–10Hz) | 200nVP-P - enables resolution of µV-level DC signals in pressure and strain gauge applications without AC coupling. |
| Output Swing (VDD = 15V) | −12.7V to +14.8V - delivers ±10V linear range into 5kΩ load, maximizing dynamic range of 16-bit+ ADCs powered from same rail. |
| Quiescent Current (max) | 4.0mA - allows dual-channel precision amplification in space-constrained, thermally sensitive PLC modules. |
| Input Common-Mode Range | −12V to +13.5V (VDD = 15V) - accepts grounded or negative-referenced sensor inputs without level-shifting circuitry. |
Pinout & Package
MAX44267AUD+ is housed in a 14-pin TSSOP package (JEDEC MO-153, 5.0mm × 4.4mm × 1.2mm). Pin layout follows standard top-view orientation with exposed pad (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 12 | OUTA / OUTB | Amplifier A/B output terminals - drive loads down to −12.7V (VDD = 15V); require local bypassing if driving capacitive loads >100pF. |
| 2, 11 | INA− / INB− | Inverting inputs - internally clamped ±1V differential; must be protected from >±20mA transient currents. |
| 3, 10 | INA+ / INB+ | Non-inverting inputs - support common-mode voltages down to −12V, enabling direct connection to grounded bridge midpoints. |
| 4 | GND | Analog ground reference - connect to solid low-impedance ground plane; separate from digital ground to avoid noise coupling. |
| 5 | CPGND | Charge-pump ground - tie directly to GND; forms return path for internal flying capacitor switching current. |
| 6 | VSS | Filtered negative supply output - powers both amplifiers; bypass with 1µF low-ESR capacitor to GND; max sink load 17mA total. |
| 7, 8 | CP / CN | Flying capacitor terminals - connect 0.022µF low-ESR ceramic capacitor between CP and CN only; no external voltage allowed. |
| 9 | CPVSS | Raw charge-pump negative output - bypass with 0.1µF capacitor to CPGND; supplies internal pump circuitry. |
| 13 | CPVDD | Charge-pump supply input - connect directly to VDD; bypass with 0.1µF capacitor to GND. |
| 14 | VDD | Main positive supply input - operate from +4.5V to +15V; bypass with 0.1µF capacitor to GND near pin. |
Key Features
| Feature | Design Value |
|---|---|
| True-zero output architecture | Enables output crossing of 0V without external negative rail-critical for interfacing with bipolar-input ADCs and eliminating level-shifter components. |
| Integrated EMI filter | Reduces susceptibility to motor noise and RF interference above 10MHz, improving reliability in industrial environments with variable-frequency drives. |
| External capacitor optimization | Adjusting CFLY (0.022µF–0.047µF) and CHOLD (0.1µF) allows trade-off between VSS ripple (<2mVP-P) and output sink capability (up to 17mA). |
| Wide input common-mode range | Accepts signals from −12V to +13.5V at VDD = 15V-supports direct connection to grounded Wheatstone bridges and current-sense shunts referenced below ground. |
| Low 1/f noise elimination | Chopper-autozero hybrid design removes drift and low-frequency noise, enabling stable DC-coupled amplification in weigh scales and precision transmitters. |
Applications
| PLC Analog Input Modules | Sensor Transmitter Front-End |
|---|---|
|
Use Scenario: Conditioning 4–20mA loop-powered sensor outputs and converting them to ±10V for high-resolution ADCs in modular I/O systems. IC Role / Device Role / Timing Role: Dual-channel precision op amp providing gain, offset correction, and true-zero output buffering before multiplexed ADC sampling. Use Value: Eliminates need for isolated negative supply rails in compact DIN-rail modules, reducing BOM cost by $1.20/unit and PCB area by 18%. |
Use Scenario: Amplifying low-level mV outputs from load cells and pressure sensors in industrial process transmitters. IC Role / Device Role / Timing Role: First-stage instrumentation-grade amplifier with matched input bias and ultra-low drift across temperature. Use Value: Achieves <0.05% FSO error over −40°C to +85°C without calibration, meeting SIL-2 functional safety requirements for transmitter linearity. |
| Bridge Sensor Signal Conditioning | Analog Level Shifting & Biasing |
|
Use Scenario: Directly biasing full-bridge strain gauges at 0V midpoint and amplifying differential output with high CMRR in structural monitoring nodes. IC Role / Device Role / Timing Role: Dual op amp configured as bridge excitation buffer and differential-to-single-ended converter with gain ≥100. Use Value: Enables 2× sensitivity boost via doubled bridge voltage while rejecting common-mode errors-improving SNR by 6dB vs. conventional solutions. |
Use Scenario: Shifting ±5V sensor outputs to 0–3.3V range compatible with microcontroller ADCs in battery-powered IoT edge devices. IC Role / Device Role / Timing Role: Precision level shifter with rail-to-rail input and true-zero output, operating from single 3.3V or 5V supply. Use Value: Removes need for dual-supply op amps and external level-shift resistors, cutting component count by 4 and power consumption by 3.1mW. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX44247AUT+T | Same core amplifier architecture but integrates all charge-pump capacitors in 8-pin µMAX® package; 3.6mA max IDD; 4.5V–15V supply. | Limited to lighter loads (≤10mA sink) due to smaller internal capacitors; not suitable for high-current PLC output stages. | Select when board space is critical and sink current ≤8mA per channel; avoids external capacitor layout complexity. |
| AD8638ARZ-REEL7 | Zero-drift dual op amp (no charge pump); 16V max supply; 12V output swing (VDD = 15V); 1.2µV/°C drift; 5.5MHz GBW. | Requires external ±12V supplies for ±10V output; lacks true-zero crossing and integrated EMI filtering. | Select when negative rail is already available and ultra-low drift (<1µV/°C) is prioritized over single-supply convenience. |
Compared with MAX44247AUT+T and AD8638ARZ-REEL7, the MAX44267AUD+ uniquely delivers ±10V output from a single supply with validated 17mA sink capability and factory-trimmed 50µV offset-making it the only option for space-constrained, high-current, true-zero industrial analog front-ends.
Availability
MAX44267AUD+ is available at Aetrix Electronics and suitable for PLC analog I/O modules, industrial sensor transmitters, and bridge-based measurement systems requiring stable component supply, long-term lifecycle assurance, and guaranteed traceable sourcing.
Supply support for MAX44267AUD+ 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) designs high-performance analog and mixed-signal ICs for industrial, automotive, and communications applications, with emphasis on precision, integration, and reliability.
The MAX44267AUD+ belongs to Maxim's signal-chain family targeting single-supply sensor interface applications-specifically engineered to eliminate negative power rails in amplifiers, multiplexers, and ADCs while maintaining metrology-grade accuracy.
FAQ
What is the maximum output sink current supported by the MAX44267AUD+?
The MAX44267AUD+ supports up to 17mA sink current per channel into its VSS rail, but total combined sink current across both channels must remain ≤17mA to maintain regulation and prevent output swing degradation. At VDD = 15V, sinking beyond this limit reduces negative output swing and increases VSS ripple-verified in Figure 2 and toc32 of the MAX44267AUD+ datasheet.
Can the MAX44267AUD+ operate from a +5V single supply?
Yes, the MAX44267AUD+ operates from +4.5V to +15V. At VDD = 5V, it delivers −3.5V to +4.9V output swing (into 5kΩ), maintains 50µV max offset, and generates −4.8V CPVSS. Input common-mode range shrinks to −2.0V to +3.5V, making it suitable for low-voltage sensor interfaces where ±3V output range suffices.
How does the charge-pump noise affect system performance, and how can it be minimized?
Charge-pump feedthrough is specified at 2mV, appearing as low-amplitude ripple on VSS and coupled to outputs. It is minimized by optimizing external capacitors: increasing CFLY to 0.047µF reduces VSS ripple by ~30%, while using low-ESR X7R ceramics for CHOLD and CFILT further suppresses high-frequency switching artifacts-confirmed in Figures 4–6 of the MAX44267AUD+ datasheet.
Is the MAX44267AUD+ susceptible to latch-up when driving heavy capacitive loads?
No latch-up occurs from capacitive loading alone. However, exceeding 17mA total sink current may cause loss of VSS regulation and non-destructive latch-up if inputs are forced toward the negative rail under overload. The MAX44267AUD+ recovers automatically when fault conditions cease-verified in Figure 7 and "Near-Zero Source Impedances" section of the datasheet.
Does the MAX44267AUD+ require external compensation for unity-gain stability?
No. The MAX44267AUD+ is internally compensated for unity-gain stability across its full operating temperature range (−40°C to +125°C). It drives ≥300pF capacitive loads without oscillation at G = +1V/V, as confirmed in the Capacitive Loading specification (300pF) and toc20/toc39 stability plots in the MAX44267AUD+ datasheet.
MAX44267AUD+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 3V/µs
- Gain Bandwidth Product:
- 5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 500 pA
- Voltage - Input Offset:
- 4 µV
- Current - Supply:
- 2.4mA (x2 Channels)
- Current - Output / Channel:
- 36 mA
- Voltage - Supply Span (Min):
- 9 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
MAX44267AUD+ FAQ
1.How can I place an order for MAX44267AUD+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX44267AUD+ 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 MAX44267AUD+ reliable?
The price and inventory of MAX44267AUD+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX44267AUD+ is usually 5 days.
3.What payment methods are accepted for MAX44267AUD+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX44267AUD+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX44267AUD+?
MAX44267AUD+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX44267AUD+ 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 MAX44267AUD+?
For technical support, including MAX44267AUD+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX44267AUD+ requirements.
6.How does Aetrix verify that MAX44267AUD+ is sourced from the original manufacturer or authorized distributors?
All MAX44267AUD+ 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 MAX44267AUD+ meets industry standards.
7.What is the process for return or replacement of MAX44267AUD+?
All MAX44267AUD+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX44267AUD+, 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 MAX44267AUD+ part is unused and in its original packaging.
Return procedure for MAX44267AUD+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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