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Analog Devices Inc./Maxim Integrated MAX4044ESD
- Part No.:
- MAX4044ESD
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4044ESD.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,748
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Product details
Overview
MAX4044ESD from Maxim Integrated is a quad micropower rail-to-rail input/output operational amplifier optimized for low-voltage, battery-powered systems. It operates from a single +2.4V to +5.5V supply, draws only 10µA per amplifier, delivers 90kHz gain-bandwidth, and achieves output swing within 10mV of rails with 100kΩ load - enabling full utilization of supply voltage in precision sensor signal conditioning.
For engineers reviewing the MAX4044ESD datasheet, MAX4044ESD pinout, MAX4044ESD application, or MAX4044ESD equivalent, key selection criteria include ultra-low quiescent current, guaranteed rail-to-rail I/O performance over –40°C to +85°C, quad-channel integration in 14-pin SO package, and suitability for high-impedance, low-power analog front-ends in portable instrumentation.
Technical Context
The MAX4044ESD implements dual NPN/PNP input stage architecture to achieve true rail-to-rail common-mode input range (VEE to VCC), with crossover at mid-supply and typical 200µV input offset voltage. Its output stage uses complementary current-source/sink topology capable of driving 25kΩ loads while maintaining ≤60mV rail proximity.
It features no phase reversal under overdriven inputs, unity-gain stability with capacitive loads up to 200pF, and high open-loop gain (>94dB) - making it suitable for precision DC-coupled amplification and low-frequency active filtering without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.4V to +5.5V single supply - enables direct operation from Li-ion, alkaline, or regulated low-voltage rails without level-shifting. |
| Supply Current per Amp | 10µA typical - supports multi-year battery life in always-on sensor nodes and wearable devices. |
| Gain-Bandwidth Product | 90kHz - sufficient for DC–10kHz signal conditioning in strain gauges, thermistors, and medical biosensors. |
| Input Offset Voltage | ±0.25mV max (TMIN to TMAX) - ensures <0.5% error in 100mV full-scale measurements without trimming. |
| Output Swing (100kΩ) | Within 10mV of VEE and VCC - maximizes dynamic range and avoids clipping in single-supply data acquisition. |
| Input Bias Current | ±20nA max over temperature - permits use with high-impedance sources (e.g., pH electrodes, piezoresistive sensors) without significant offset drift. |
| Common-Mode Rejection | 65dB min - maintains accuracy in noisy industrial environments with ground differentials up to 100mV. |
Pinout & Package
MAX4044ESD is housed in a 14-pin SO (Small Outline) package with standard 1.27mm pitch, JEDEC MS-012AC compliant, and rated for –40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 13 | VCC | Positive supply input - must be bypassed with 100nF capacitor to VEE for stable operation. |
| 2, 12 | OUTA, OUTB | Amplifier A and B outputs - high-impedance when shutdown asserted (not applicable to MAX4044). |
| 3, 11 | INA-, INB- | Inverting inputs for amplifiers A and B - matched impedance critical to minimize bias-current-induced offset. |
| 4, 10 | INA+, INB+ | Noninverting inputs for amplifiers A and B - rail-to-rail common-mode range allows direct connection to sensor bridges. |
| 5, 9 | VEE | Negative supply - tied to GND in single-supply configurations; requires separate 100nF bypass if dual-supply used. |
| 6, 8 | OUTC, OUTD | Amplifier C and D outputs - fully independent; each channel consumes 10µA and drives 25kΩ loads. |
| 7 | INC+ | Noninverting input for amplifier C - part of quad configuration; no shared internal nodes across channels. |
| 14 | IND+ | Noninverting input for amplifier D - enables four independent signal paths on single die with minimal crosstalk (<–80dB @ 1kHz). |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Extends from VEE to VCC - eliminates need for level-shifting circuitry when interfacing with resistive sensors referenced to supply rails. |
| No phase reversal on overdrive | Prevents latch-up or uncontrolled output transitions during transient input excursions beyond supply rails - critical for robust comparator-mode use. |
| Unity-gain stable with 200pF load | Enables direct driving of ADC input capacitors or long PCB traces without external isolation resistors or compensation networks. |
| Low input offset voltage drift | 2µV/°C max - limits thermal-induced error to <0.2mV over 100°C ambient range, supporting uncalibrated field-deployed instruments. |
| High open-loop gain (94dB min) | Ensures <0.01% gain error in closed-loop configurations with gain ≥10, even with feedback resistor tolerances up to ±1%. |
Applications
| Strain Gauge Signal Conditioning | Battery-Operated Medical Sensors |
|---|---|
Use Scenario: Amplifying mV-level Wheatstone bridge outputs from load cells or pressure transducers in handheld diagnostic tools. IC Role / Device Role / Timing Role: Quad op amp provides simultaneous instrumentation-grade gain, filtering, and reference buffering for multi-sensor arrays. Use Value: 10µA per channel enables >5-year operation on two AA cells; rail-to-rail I/O preserves full bridge differential range without supply headroom loss. |
Use Scenario: Front-end amplification of ECG, pulse oximetry, or glucose sensor signals in disposable wearable patches. IC Role / Device Role / Timing Role: Precision DC-coupled amplifier with low noise (70nV/√Hz) and negligible power overhead in ultra-low-duty-cycle monitoring systems. Use Value: 200µV max input offset ensures sub-1µV baseline stability; 90kHz GBW supports accurate 100Hz biopotential bandwidth with margin. |
| Digital Scale Analog Front-End | Portable Environmental Monitoring |
Use Scenario: Interfacing high-resolution load cells in battery-powered kitchen or industrial scales requiring 0.01% linearity. IC Role / Device Role / Timing Role: Quad configuration allows independent amplification of multiple bridge elements or ratiometric reference paths. Use Value: 65dB CMRR rejects common-mode noise from switching regulators; 10mV rail swing enables 2.4V supply to deliver full 2.39V output range. |
Use Scenario: Signal conditioning for CO₂, VOC, or particulate sensors in handheld air quality analyzers. IC Role / Device Role / Timing Role: Low-power transimpedance and buffer stage for photodiode or electrochemical cell outputs. Use Value: Input bias current ≤20nA prevents loading of high-impedance sensor electrodes; 14-pin SO footprint simplifies layout for multi-channel sensor fusion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad micropower rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2464IDR | Higher supply current (225µA/amp), wider supply range (2.7–6V), no rail-to-rail input - limited to VEE +0.2V to VCC –0.2V common-mode. | Not suitable for sub-2.7V battery operation or direct sensor-to-rail interfacing; better for higher-speed (6.4MHz GBW) applications. | Select TLV2464IDR only when speed >100kHz or supply >2.7V is guaranteed; avoid where ultra-low power or true rail-to-rail input is required. |
| OPA2333PWR | Zero-drift architecture (0.02µV/°C offset drift), lower noise (5.5nV/√Hz), but higher quiescent current (17µA/amp) and no shutdown mode. | Preferred for high-precision DC measurements over wide temperature ranges; less optimal for multi-year battery life in always-on nodes. | Choose OPA2333PWR when offset drift dominates error budget; select MAX4044ESD when µA-level current and 14-pin SO compatibility are primary constraints. |
Compared with TLV2464IDR and OPA2333PWR, MAX4044ESD uniquely balances ultra-low 10µA supply current, true rail-to-rail I/O, and quad-channel integration in a legacy-compatible 14-pin SO package - making it the only option meeting all three requirements simultaneously for long-life portable instrumentation.
Availability
MAX4044ESD is available at Aetrix Electronics and suitable for battery-powered medical devices, portable environmental sensors, digital weighing equipment, and handheld test instrumentation requiring stable component supply and extended temperature support.
Supply support for MAX4044ESD 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 precision analog, mixed-signal, and power management ICs for demanding industrial, medical, and communications applications.
The MAX4040–MAX4044 family was engineered specifically for micropower, rail-to-rail I/O operation in space-constrained, battery-dependent systems - emphasizing low-voltage functionality, minimal quiescent current, and guaranteed performance across –40°C to +85°C.
FAQ
What is the operating temperature range for MAX4044ESD?
The MAX4044ESD is specified and guaranteed over the extended industrial temperature range of –40°C to +85°C. All electrical parameters - including supply current, input offset voltage, and output swing - are tested and characterized across this full range, ensuring reliable performance in portable outdoor equipment and automotive cabin applications.
Does MAX4044ESD include a shutdown feature?
No, the MAX4044ESD does not include a shutdown function. Shutdown capability is only present in the MAX4041 (single) and MAX4043 (dual) variants of the family. The MAX4044ESD is a quad op amp with fixed operation - all four amplifiers remain active whenever VCC and VEE are powered within specification.
Can MAX4044ESD drive capacitive loads directly?
Yes, the MAX4044ESD is unity-gain stable with capacitive loads up to 200pF without external compensation. This allows direct connection to ADC sample-and-hold inputs or long PCB traces. For loads exceeding 200pF, an isolation resistor (e.g., 1kΩ) between output and capacitance restores stability, though it introduces minor gain error due to voltage division.
What is the maximum resistive load the MAX4044ESD can drive while maintaining rail-to-rail swing?
The MAX4044ESD is fully guaranteed to drive a 25kΩ load to VCC/2 while maintaining output swing within 60mV of both rails. With lighter loads (e.g., 100kΩ), typical swing improves to within 10mV of rails - verified across supply voltages from +2.4V to +5.5V and temperatures from –40°C to +85°C.
Is MAX4044ESD pin-compatible with other devices in the MAX4040–MAX4044 family?
No - the MAX4044ESD uses a 14-pin SO package with unique pin assignments for its quad configuration, while MAX4040 (SOT23-5), MAX4041/MAX4042 (8-pin µMAX/SO), and MAX4043 (10-pin µMAX/14-pin SO) have different pinouts and channel counts. Direct replacement requires PCB redesign; functional substitution must account for package, pin count, and channel count differences.
MAX4044ESD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.04V/µs
- Gain Bandwidth Product:
- 90 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 2 nA
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 14µA (x4 Channels)
- Current - Output / Channel:
- 2.5 mA
- Voltage - Supply Span (Min):
- 2.4 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
MAX4044ESD FAQ
1.How can I place an order for MAX4044ESD through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4044ESD 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 MAX4044ESD reliable?
The price and inventory of MAX4044ESD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4044ESD is usually 5 days.
3.What payment methods are accepted for MAX4044ESD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4044ESD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4044ESD?
MAX4044ESD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4044ESD 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 MAX4044ESD?
For technical support, including MAX4044ESD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4044ESD requirements.
6.How does Aetrix verify that MAX4044ESD is sourced from the original manufacturer or authorized distributors?
All MAX4044ESD 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 MAX4044ESD meets industry standards.
7.What is the process for return or replacement of MAX4044ESD?
All MAX4044ESD units undergo pre-shipment inspection (PSI). If there is an issue with MAX4044ESD, 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 MAX4044ESD part is unused and in its original packaging.
Return procedure for MAX4044ESD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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