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Analog Devices Inc./Maxim Integrated MAX4294EUD+
- Part No.:
- MAX4294EUD+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MAX4294EUD+.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,841
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Product details
Overview
MAX4294EUD+ from Maxim Integrated is a quad, rail-to-rail input/output operational amplifier optimized for ultra-low-voltage, micropower portable systems. It operates from 1.8V to 5.5V single supply (or ±0.9V to ±2.75V dual), draws only 100µA per amplifier, delivers 500kHz gain-bandwidth, and achieves ±200µV input offset voltage - enabling precision signal conditioning in two-cell battery-powered instrumentation and sensor interfaces.
For engineers reviewing the MAX4294EUD+ datasheet, MAX4294EUD+ pinout, MAX4294EUD+ application, or MAX4294EUD+ equivalent, key selection criteria include guaranteed 1.8V operation, rail-to-rail I/O swing within 46mV of rails into 2kΩ, 120dB open-loop gain, THD+N of 0.017% at 1kHz, and TSSOP-14 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX4294EUD+ implements a composite NPN/PNP rail-to-rail input stage that extends common-mode range to both supply rails, with crossover centered at VCC/2. Its output stage uses complementary MOSFETs to source/sink current while maintaining 46mV rail clearance into 2kΩ loads.
It features unity-gain stability with capacitive loads up to 100pF, no phase reversal under overdrive, and input protection via 10.6kΩ series resistors plus back-to-back diode stacks - supporting robust operation in noisy, battery-derived power domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8V to 5.5V single supply - enables direct interface with decaying two-cell alkaline/NiMH/Li-ion batteries without regulation. |
| Quiescent Current | 100µA per amplifier - supports multi-year battery life in always-on sensor nodes and portable meters. |
| Gain-Bandwidth Product | 500kHz - sufficient for DC–100kHz signal conditioning in strain gauges, digital scales, and medical front-ends. |
| Input Offset Voltage | ±200µV (max) - ensures <0.02% error in 1V full-scale 12-bit systems without trimming. |
| Output Swing (2kΩ) | Within 46mV of rails - preserves dynamic range in low-voltage ADC drivers and reference buffers. |
| Open-Loop Gain | 120dB (RL = 100kΩ) - maintains <10ppm gain error in precision transimpedance and differential amplifiers. |
| THD + Noise | 0.017% at 1kHz - meets audio-grade and high-fidelity sensor signal chain requirements. |
Pinout & Package
The MAX4294EUD+ is housed in a 14-pin TSSOP package (JEDEC MO-153, 5.0mm × 4.4mm × 1.2mm), optimized for automated assembly and thermal performance in dense layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 9, 13 | IN+ | Noninverting input for amplifiers A, B, C, D - accepts signals from 0V to VCC with rail-to-rail CMR. |
| 2, 6, 10, 14 | IN− | Inverting input for amplifiers A, B, C, D - matched impedance critical for bias-current-induced offset minimization. |
| 3, 7, 11, 12 | OUT | Amplifier output for A, B, C, D - drives 2kΩ load to within 46mV of VCC/VEE; stable with ≤100pF capacitance. |
| 4 | VEE | Negative supply - tied to GND in single-supply mode; supports dual ±0.9V to ±2.75V operation. |
| 14 | VCC | Positive supply - bypass with 100nF capacitor to VEE for noise immunity in battery-powered systems. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-Rail Input Common-Mode Range | 0V to VCC - eliminates level-shifting circuitry when interfacing with unipolar sensors and DACs. |
| Rail-to-Rail Output Swing (2kΩ) | Within 46mV of VCC/VEE - maximizes usable output voltage range in 1.8V–3.3V systems. |
| Unity-Gain Stability | Stable with ≤100pF capacitive load - simplifies driving ADC inputs and long traces without isolation resistors. |
| No Phase Reversal on Overdrive | Prevents latch-up during input transients - enhances reliability in comparator-mode use and fault-tolerant designs. |
| Ultra-Low-Voltage Operation | Guaranteed functionality down to 1.8V - supports end-of-life battery operation in portable equipment. |
Applications
| Strain Gauge Signal Conditioning | Digital Scale Front-End |
|---|---|
Use Scenario: Amplifying mV-level Wheatstone bridge outputs from metal foil or semiconductor strain gauges in industrial load cells. IC Role / Device Role / Timing Role: Precision instrumentation amplifier core with rail-to-rail I/O enabling full bridge swing utilization at 1.8V–3.3V supplies. Use Value: ±200µV offset and 120dB open-loop gain reduce calibration drift and enable 16-bit effective resolution without trimming. | Use Scenario: Signal conditioning for load cell outputs in handheld digital kitchen or postal scales powered by two AA batteries. IC Role / Device Role / Timing Role: Low-power, rail-to-rail op amp in difference amplifier configuration driving 16-bit sigma-delta ADC. Use Value: 100µA per amplifier extends battery life beyond 2 years; 46mV rail swing preserves SNR in 3.3V ADC reference domain. |
| Two-Cell Battery Monitoring | Portable Medical Sensor Interface |
Use Scenario: Current sensing and voltage monitoring in rechargeable NiMH or Li-ion two-cell packs for portable tools and diagnostics. IC Role / Device Role / Timing Role: Current-sense amplifier and battery voltage buffer in energy-efficient power management subsystem. Use Value: 1.8V minimum operation allows accurate measurement down to battery EOL (~2.4V); rail-to-rail output ensures full ADC utilization. | Use Scenario: Amplifying low-amplitude biopotential signals (ECG, EMG) in wearable health monitors with coin-cell or AAA power. IC Role / Device Role / Timing Role: Ultra-low-power, low-noise front-end amplifier with THD+N = 0.017% at 1kHz for analog signal integrity. Use Value: 500kHz GBW supports DC–100Hz bio-signal bandwidth; micropower draw enables >7-day continuous operation on 200mAh battery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2464IDR | Higher quiescent current (550µA/amplifier), wider supply range (2.7V–6V), lower GBW (6.4MHz) | Better drive strength but unsuitable for sub-2V battery operation | Select when higher speed and output current are required and supply ≥2.7V is guaranteed. |
| AD8604ARUZ | Lower offset (±65µV), higher supply current (240µA/amplifier), same 1.8V min, TSSOP-14 package | Superior DC precision at cost of 2.4× higher power consumption | Select when offset-critical applications (e.g., precision weigh scales) justify increased current draw. |
Compared with TLV2464IDR and AD8604ARUZ, the MAX4294EUD+ uniquely balances ultra-low 100µA supply current, guaranteed 1.8V operation, and rail-to-rail I/O in TSSOP-14 - making it optimal for longest battery life in space-constrained, low-voltage portable instrumentation.
Availability
MAX4294EUD+ is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered sensor interfaces, and low-voltage industrial control systems requiring stable component supply across extended production lifecycles.
Supply support for MAX4294EUD+ 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 portable applications.
The MAX4291/MAX4292/MAX4294 family was engineered specifically for micropower, rail-to-rail I/O operation in 1.8V–5.5V battery-powered systems - targeting portable instrumentation, sensor signal chains, and energy-harvesting interfaces.
FAQ
What is the minimum operating voltage for the MAX4294EUD+?
The MAX4294EUD+ is fully specified and guaranteed to operate from a 1.8V single supply (or ±0.9V dual supply). Test data shows functional operation down to 1.5V in typical conditions, but system design must rely on the 1.8V guarantee for production reliability. This makes the MAX4294EUD+ ideal for two-cell alkaline, NiMH, or single-cell Li-ion battery systems where voltage declines over discharge cycles.
Does the MAX4294EUD+ support rail-to-rail input and output simultaneously?
Yes, the MAX4294EUD+ provides true rail-to-rail input common-mode range (0V to VCC) and rail-to-rail output swing (within 46mV of VCC/VEE into 2kΩ). This simultaneous capability eliminates external level-shifting components when interfacing with unipolar sensors, DACs, or ADCs in low-voltage systems - a key advantage over many competing op amps that only support one or the other.
Can the MAX4294EUD+ drive capacitive loads without oscillation?
The MAX4294EUD+ is unity-gain stable with capacitive loads up to 100pF, as confirmed in the manufacturer's Load Resistor vs. Capacitive Load characterization. For loads exceeding 100pF (e.g., ADC input capacitance + PCB trace), an isolation resistor (e.g., 100Ω) between output and load is recommended - though this introduces minor gain error due to voltage division with the load resistance.
What is the input offset voltage specification for the MAX4294EUD+?
The MAX4294EUD+ has a maximum input offset voltage of ±200µV at TA = +25°C and VCC = 5.0V, with typical value also ±200µV. Over temperature (–40°C to +85°C), the drift is specified at 1.2µV/°C. This low offset enables high-accuracy DC-coupled amplification in precision applications like digital scales and strain gauge interfaces without requiring external trimming.
Is the MAX4294EUD+ pin-compatible with other devices in the MAX429x family?
No - the MAX4294EUD+ (quad, TSSOP-14) is not pin-compatible with the MAX4291 (single, SC70-5) or MAX4292 (dual, UCSP-8/µMAX-8). Each variant has distinct pin counts, functions, and layouts. The MAX4294EUD+ pinout is specific to its 14-pin TSSOP package and must be implemented using its dedicated footprint; migration requires PCB redesign.
MAX4294EUD+ 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:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.2V/µs
- Gain Bandwidth Product:
- 500 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 15 nA
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 100µA (x4 Channels)
- Current - Output / Channel:
- 20 mA
- Voltage - Supply Span (Min):
- 1.8 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
MAX4294EUD+ FAQ
1.How can I place an order for MAX4294EUD+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4294EUD+ 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 MAX4294EUD+ reliable?
The price and inventory of MAX4294EUD+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4294EUD+ is usually 5 days.
3.What payment methods are accepted for MAX4294EUD+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4294EUD+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4294EUD+?
MAX4294EUD+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4294EUD+ 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 MAX4294EUD+?
For technical support, including MAX4294EUD+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4294EUD+ requirements.
6.How does Aetrix verify that MAX4294EUD+ is sourced from the original manufacturer or authorized distributors?
All MAX4294EUD+ 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 MAX4294EUD+ meets industry standards.
7.What is the process for return or replacement of MAX4294EUD+?
All MAX4294EUD+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4294EUD+, 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 MAX4294EUD+ part is unused and in its original packaging.
Return procedure for MAX4294EUD+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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