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Analog Devices Inc./Maxim Integrated MAX44243ASD+T
- Part No.:
- MAX44243ASD+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX44243ASD+T.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
MAX44243ASD+T from Maxim Integrated is a 36V, ultra-precision, low-noise, dual operational amplifier featuring chopper-stabilized and auto-zeroing architecture. It delivers 5µV max input offset voltage, 20nV/°C max drift, 9nV/√Hz input voltage noise at 1kHz, rail-to-rail output, and operates from 2.7V to 36V single supply - ideal for high-accuracy load cell amplification in industrial weighing systems.
For engineers reviewing the MAX44243ASD+T datasheet, MAX44243ASD+T pinout, MAX44243ASD+T application, or MAX44243ASD+T equivalent, key selection criteria include guaranteed -40°C to +125°C operation, SO-14 package compatibility, 1µs settling time to 0.01%, 5MHz gain-bandwidth product, and integrated EMI filtering for noisy industrial environments.
Technical Context
The MAX44243ASD+T implements a dual-channel, zero-drift op amp architecture combining chopper stabilization and auto-zeroing to eliminate 1/f noise and suppress offset drift over temperature and time. Its input stage uses back-to-back clamp diodes without current-limiting resistors to preserve low-noise performance, requiring external input current limiting if differential voltages exceed ±1V.
This device supports both single-supply (2.7V–36V) and dual-supply (±1.35V–±18V) operation, with rail-to-rail output swing and guaranteed CMRR of 140dB over -40°C to +125°C. The SO-14 package enables high-density placement while maintaining thermal resistance (θJA = 81°C/W) suitable for thermally constrained industrial PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 36V single supply - supports wide-input industrial front-ends without level-shifting. |
| Input Offset Voltage (max) | 5µV - enables sub-16-bit accuracy in precision sensor signal chains without calibration. |
| Offset Drift (max) | 20nV/°C - ensures stable DC gain over full industrial temperature range (-40°C to +125°C). |
| Input Voltage Noise Density | 9nV/√Hz at 1kHz - critical for low-frequency transducer amplification with minimal added noise. |
| Gain-Bandwidth Product | 5MHz - supports fast settling (1µs to 0.01%) for high-throughput ADC buffering applications. |
| Quiescent Current per Channel | 0.55mA (max) - balances low power with high precision for battery-backed or energy-conscious systems. |
| Common-Mode Rejection Ratio | 140dB (min) - rejects interference from shared analog/digital ground paths in mixed-signal PLC modules. |
Pinout & Package
MAX44243ASD+T is housed in an 14-pin SO (Small Outline) package with exposed pad not present; JEDEC-standard SO-14 footprint, 1.27mm pitch, 8.65mm × 3.91mm body size, and θJA = 81°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTD | Channel D output - unused in dual-channel MAX44243; must be left unconnected or tied to VSS. |
| 2 | IND− | Channel D negative input - not functional in MAX44243; no internal connection. |
| 3 | IND+ | Channel D positive input - not functional in MAX44243; no internal connection. |
| 4 | VSS | Negative supply rail - connects to system ground or negative supply; reference for all inputs/outputs. |
| 5 | VDD | Positive supply rail - accepts 2.7V–36V; powers both amplifier channels and internal auto-zero circuitry. |
| 6 | INA+ | Channel A noninverting input - high-impedance (≥1012Ω), low-bias-current node for precision signal routing. |
| 7 | INA− | Channel A inverting input - matched to INA+ for common-mode rejection; requires symmetrical layout. |
| 8 | OUTA | Channel A output - rail-to-rail capable; drives 5kΩ loads to within 130mV of rails at +25°C. |
| 9 | INB− | Channel B inverting input - electrically identical to INA−; supports dual independent gain stages. |
| 10 | INB+ | Channel B noninverting input - matched bias current and offset characteristics to INA+. |
| 11 | OUTB | Channel B output - fully independent of OUTA; supports dual-sensor or differential-output configurations. |
| 12 | INC+ | Channel C noninverting input - not functional in MAX44243; no internal connection. |
| 13 | INC− | Channel C inverting input - not functional in MAX44243; no internal connection. |
| 14 | OUTC | Channel C output - not functional in MAX44243; must be left unconnected. |
Key Features
| Feature | Design Value |
|---|---|
| Chopper + Auto-Zero Hybrid Architecture | Eliminates 1/f noise and drift without introducing switching artifacts - enables true DC precision below 0.1Hz. |
| Integrated EMI Filter | Passive on-chip RC network attenuates RF interference >10MHz - prevents corruption of microvolt-level sensor signals. |
| Rail-to-Rail Output Stage | Swings within 130mV of VDD and 60mV of VSS at +25°C - maximizes dynamic range when interfacing with 3.3V or 5V ADCs. |
| Guaranteed Operation to +125°C | Full electrical specs validated across -40°C to +125°C - qualified for under-hood automotive and industrial control cabinet use. |
| Low Input Bias Current | 600pA typical at +25°C - minimizes voltage error across high-impedance source networks (e.g., pH electrodes, piezoresistive sensors). |
Applications
| PLC Analog I/O Modules | Transducer Amplifiers |
|---|---|
Use Scenario: Signal conditioning of 4–20mA loop-powered sensors in programmable logic controller backplanes operating at 24VDC with ambient temperatures up to +70°C. IC Role / Device Role / Timing Role: Dual-channel precision amplifier providing isolated gain and offset correction for two independent current-loop inputs. Use Value: 5µV offset and 20nV/°C drift ensure <0.01%FS error over full temperature range without field recalibration. |
Use Scenario: Amplifying mV-level outputs from strain-gauge-based pressure transducers in HVAC control systems with 12VDC supply. IC Role / Device Role / Timing Role: Instrumentation-grade buffer with EMI filtering, driving 16-bit SAR ADC inputs at 100ksps sampling rate. Use Value: 9nV/√Hz noise and 1µs settling enable 16-bit effective resolution without averaging or oversampling. |
| Load Cell Amplifiers | Precision Instrumentation |
Use Scenario: Weighing platform electronics using quarter-bridge load cells excited at ±10V, digitized by 18-bit delta-sigma ADC (e.g., MAX11211). IC Role / Device Role / Timing Role: Low-drift, low-noise gain stage preceding ADC; configured as in-amp with matched external resistors. Use Value: Near-zero drift preserves calibration stability over months of continuous operation in warehouse environments. |
Use Scenario: Front-end amplification in portable multimeters and benchtop calibrators requiring sub-µV offset stability and 10ppm linearity. IC Role / Device Role / Timing Role: Dual-channel DC-coupled amplifier supporting simultaneous voltage and current measurement paths. Use Value: 140dB CMRR and 166dB PSRR reject power supply ripple and shared-ground noise in multi-rail test equipment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision dual op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2189IDR | Lower 5.2nV/√Hz noise but higher 0.75mA quiescent current; no integrated EMI filter. | Better for ultra-low-noise audio preamps; less robust in industrial EMI environments. | Select OPA2189IDR only when noise dominates over power and EMI immunity requirements. |
| LTC2057HMS8#PBF | Higher 12µV max VOS and 30nV/°C drift; wider 4.75V–40V supply range; no rail-to-rail output. | Suitable for high-voltage sensor interfaces where output swing beyond 1V compliance is acceptable. | Choose LTC2057HMS8#PBF when operating above 36V or when cost sensitivity outweighs drift performance. |
Compared with OPA2189IDR and LTC2057HMS8#PBF, the MAX44243ASD+T uniquely combines EMI filtering, rail-to-rail output, and 5µV/20nV/°C precision in a single SO-14 package - making it optimal for space-constrained, noise-prone industrial instrumentation where calibration stability is mandatory.
Availability
MAX44243ASD+T is available at Aetrix Electronics and suitable for PLC analog I/O modules, transducer amplifiers, and load cell amplifiers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX44243ASD+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, designs high-performance analog and mixed-signal ICs for industrial, automotive, and communications applications.
The MAX44243ASD+T belongs to the MAX4424x family of zero-drift op amps engineered specifically for DC-critical sensor signal chains in harsh environments - emphasizing long-term offset stability, EMI resilience, and wide-supply flexibility.
FAQ
What is the maximum operating temperature for MAX44243ASD+T?
The MAX44243ASD+T is rated for continuous operation from -40°C to +125°C, with all electrical specifications guaranteed across this full industrial temperature range. Junction temperature must not exceed +150°C, and the SO-14 package's thermal resistance (θJA = 81°C/W) allows safe dissipation at up to 606.1mW under specified board conditions.
Does MAX44243ASD+T support single-supply operation?
Yes, MAX44243ASD+T supports true single-supply operation from 2.7V to 36V. Its input common-mode range extends from (VSS – 0.05V) to (VDD – 1.5V), and its rail-to-rail output swings within 130mV of VDD and 60mV of VSS at +25°C - enabling direct interfacing with 3.3V or 5V ADCs without level-shifting circuitry.
How does the EMI filter in MAX44243ASD+T improve system reliability?
The integrated passive EMI filter in MAX44243ASD+T attenuates radio-frequency interference above 10MHz before it reaches the sensitive input stage. This prevents output corruption and false triggering in industrial settings with variable-frequency drives, wireless comms, or switching power supplies - eliminating the need for external ferrite beads or RC filters in most applications.
Can MAX44243ASD+T drive capacitive loads?
MAX44243ASD+T remains stable with up to 300pF capacitive load when configured as a unity-gain buffer (AV = +1V/V), as verified in the datasheet's stability plots. For loads exceeding 300pF, a series isolation resistor (RISO) of ≥10Ω is recommended to maintain phase margin above 60° and prevent sustained oscillation.
What is the purpose of the unused pins (1, 2, 3, 12, 13, 14) on MAX44243ASD+T?
Pins 1 (OUTD), 2 (IND−), 3 (IND+), 12 (INC+), 13 (INC−), and 14 (OUTC) are not connected internally in the MAX44243ASD+T. They must be left floating - no pull-up, pull-down, or tie-to-rail connections - to avoid parasitic coupling or unintended current paths that could degrade noise or offset performance.
MAX44243ASD+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 3.8V/µs
- Gain Bandwidth Product:
- 5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 300 pA
- Voltage - Input Offset:
- 1 µV
- Current - Supply:
- 420µA (x4 Channels)
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
MAX44243ASD+T FAQ
1.How can I place an order for MAX44243ASD+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX44243ASD+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 MAX44243ASD+T reliable?
The price and inventory of MAX44243ASD+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX44243ASD+T is usually 5 days.
3.What payment methods are accepted for MAX44243ASD+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX44243ASD+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX44243ASD+T?
MAX44243ASD+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX44243ASD+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 MAX44243ASD+T?
For technical support, including MAX44243ASD+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX44243ASD+T requirements.
6.How does Aetrix verify that MAX44243ASD+T is sourced from the original manufacturer or authorized distributors?
All MAX44243ASD+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 MAX44243ASD+T meets industry standards.
7.What is the process for return or replacement of MAX44243ASD+T?
All MAX44243ASD+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX44243ASD+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 MAX44243ASD+T part is unused and in its original packaging.
Return procedure for MAX44243ASD+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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