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Analog Devices Inc./Maxim Integrated MAX4474EUA
- Part No.:
- MAX4474EUA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX4474EUA.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,849
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Product details
Overview
MAX4474EUA from Maxim Integrated is a dual micropower rail-to-rail operational amplifier optimized for ultra-low-power, single-supply systems. It operates from +1.8V to +5.5V, draws only 750nA per amplifier, delivers 40kHz gain-bandwidth, and supports minimum closed-loop gain of +5V/V. It is used in battery-powered sensor front-ends and portable instrumentation where ground-sensing input and rail-to-rail output are critical.
For engineers reviewing the MAX4474EUA datasheet, MAX4474EUA pinout, MAX4474EUA application, or MAX4474EUA equivalent, this page provides verified technical context, package-specific pin definitions, real-world application mappings, and validated alternative options for low-voltage, low-current analog signal conditioning.
Technical Context
The MAX4474EUA belongs to the MAX4464/MAX4470 family and features BiCMOS process technology enabling ultra-low quiescent current while maintaining rail-to-rail output swing within 4mV of supply rails under 100kΩ load. Its ground-sensing input common-mode range (VSS to VDD − 1.1V) supports direct interfacing with sensors referenced to system ground.
Unlike unity-gain stable variants (e.g., MAX4471), the MAX4474EUA is decompensated and requires minimum closed-loop gain ≥+5V/V for stability. It achieves 80° phase margin at 40kHz GBW with 1MΩ load and 8pF capacitive load, and supports 250pF minimum capacitive load without sustained oscillation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8V to 5.5V - enables direct operation from single Li⁺, two-cell alkaline/NiCd, or regulated 3.3V/5V rails |
| Supply Current per Amplifier | 0.75µA typical at +5V - allows >10-year battery life in always-on sensor nodes powered by CR2032 |
| Gain-Bandwidth Product | 40kHz - supports DC-coupled signal conditioning up to ~3kHz with gain ≥5, suitable for thermistor, pH, or strain gauge amplification |
| Input Offset Voltage | ±0.5mV typical - ensures <10µV error contribution in high-impedance, low-level sensor interfaces |
| Output Drive Capability | ±11mA at +5V - drives 470Ω loads directly, eliminating need for external buffer stages in low-power DAC output stages |
| Common-Mode Input Range | VSS to (VDD − 1.1V) - accepts inputs down to ground, enabling true single-supply operation with grounded reference sensors |
| Capacitive Load Drive | 250pF minimum - accommodates PCB trace capacitance and filtering caps without compensation network |
Pinout & Package
MAX4474EUA is housed in an 8-pin µMAX® package (pin-compatible with SOIC-8 and SOT23-8 footprints but smaller). The µMAX package measures 3mm × 3mm × 1.1mm and uses standard gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTA | Amplifier A output - rail-to-rail capable, sinks/sources ±11mA, swings within 4mV of VDD/VSS at 100kΩ |
| 2 | INA− | Inverting input for Channel A - part of differential pair with ground-sensing capability (VCM = VSS) |
| 3 | INA+ | Noninverting input for Channel A - accepts signals from 0V up to VDD − 1.1V without phase reversal |
| 4 | VSS | Negative power supply - must be connected to system ground; serves as reference for input common-mode and output swing |
| 5 | VDD | Positive power supply - accepts 1.8V–5.5V; requires local 0.1µF ceramic bypass capacitor |
| 6 | INB+ | Noninverting input for Channel B - identical electrical specs to INA+, supports independent dual-channel operation |
| 7 | INB− | Inverting input for Channel B - matched to INA−; enables fully differential or dual single-ended configurations |
| 8 | OUTB | Amplifier B output - electrically identical to OUTA; allows simultaneous processing of two analog signals |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low 750nA supply current per amplifier | Enables multi-year operation on coin-cell batteries in remote sensor nodes and wearable health monitors |
| Rail-to-rail output stage | Delivers full dynamic range across entire supply range - maximizes ADC utilization in 10-bit+ data acquisition systems |
| Ground-sensing input common-mode range | Accepts 0V-referenced transducer outputs (e.g., thermocouples, RTDs, pH electrodes) without level-shifting circuitry |
| No phase reversal on overdriven inputs | Prevents latch-up or erroneous control decisions when input exceeds common-mode limits during transient events |
| Stable for closed-loop gain ≥+5V/V | Supports precision gain-setting with standard resistor ratios (e.g., 49.9kΩ/10kΩ) without external compensation |
Applications
| Portable Gas Sensor Front-End | Low-Power pH Meter Analog Stage |
|---|---|
Use Scenario: Signal conditioning for electrochemical gas sensors operating from CR2450 battery with 10-year target lifetime. IC Role / Device Role / Timing Role: Dual op-amp configured as transimpedance amplifier (Channel A) and reference buffer (Channel B) in single-supply 3.3V system. Use Value: 750nA quiescent current per channel extends battery life; rail-to-rail output drives 12-bit SAR ADC input directly without level shift. |
Use Scenario: High-impedance electrode interface in handheld pH meters powered by two AA alkaline cells (3V). IC Role / Device Role / Timing Role: First-stage buffer and gain stage for glass electrode output (≥1GΩ source impedance) with ground-referenced biasing. Use Value: Ground-sensing input eliminates need for negative supply or charge pump; 0.5mV offset minimizes calibration drift over temperature. |
| Solar-Powered Remote Thermistor Node | Electrometer-Grade Leakage Current Monitor |
Use Scenario: Batteryless IoT node harvesting energy from miniature solar cell, requiring sub-1µA sleep current and burst-mode sensing. IC Role / Device Role / Timing Role: Dual-channel amplifier: one for thermistor voltage divider, one for photodiode current-to-voltage conversion. Use Value: 1.8V minimum supply enables operation during low-light conditions; 40kHz GBW supports 10ms measurement cycles with adequate settling. |
Use Scenario: Ultra-low-current monitoring in semiconductor test fixtures or insulation resistance testers requiring pA-level resolution. IC Role / Device Role / Timing Role: Electrometer amplifier with T-network feedback, leveraging ultra-low input bias current (±200pA typ) and high CMRR (95dB). Use Value: Input bias current <500pA ensures <1% error in 100pA–10nA measurements; 120dB open-loop gain maintains accuracy across wide output swing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual micropower op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4471EKA+T | Unity-gain stable, 9kHz GBW, same 750nA supply current and 1.8V min supply | Supports gain-of-1 configurations (e.g., voltage followers) without external compensation; lower bandwidth limits AC-coupled sensor use | Select when unity-gain buffering or low-frequency (<1kHz) signal paths dominate; avoid if ≥5V/V fixed gain is required |
| TLV2462IDR | 1.5µA supply current, 6.4MHz GBW, rail-to-rail I/O, 2.7V–6V supply range | Higher power and bandwidth suit faster, higher-voltage systems; lacks guaranteed ground-sensing input (VCM starts at −0.2V) | Select when driving heavier loads (>20mA) or requiring >10kHz signal bandwidth; not suitable for sub-2V or true ground-referenced inputs |
Compared with MAX4471EKA+T, MAX4474EUA trades unity-gain stability for 4.4× higher bandwidth and higher minimum gain requirement-ideal for precision gain stages in energy-constrained systems. Versus TLV2462IDR, MAX4474EUA reduces supply current by 2× and enables 1.8V operation, but sacrifices drive strength and AC performance.
Availability
MAX4474EUA is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered sensor nodes, and solar-harvested IoT edge devices requiring stable component supply with long-term lifecycle support.
Supply support for MAX4474EUA 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 MAX4464/MAX4470 family was engineered specifically for micropower, single-supply signal conditioning in battery- and energy-harvesting systems where ground-referenced sensing and rail-to-rail output are mandatory.
FAQ
What is the minimum stable closed-loop gain for MAX4474EUA?
The MAX4474EUA is decompensated and requires a minimum closed-loop gain of +5V/V for stable operation. This is confirmed in the Selector Guide and Electrical Characteristics table, where "Minimum Stable Gain" is listed as 5V/V for MAX4474. Using lower gains (e.g., unity-gain follower) risks oscillation unless external compensation is added.
Does MAX4474EUA support true ground-sensing input operation?
Yes. The MAX4474EUA's input common-mode voltage range extends from VSS (ground) to VDD − 1.1V, as specified in the Electrical Characteristics table. This allows direct connection of 0V-referenced sensors (e.g., thermistors, pH electrodes) without level-shifting circuitry - a key feature distinguishing it from many general-purpose op amps.
What package type is used for MAX4474EUA and what are its key mechanical properties?
MAX4474EUA uses the 8-pin µMAX® package (package code U8+1), measuring 3mm × 3mm × 1.1mm with gull-wing leads. It shares footprint compatibility with SOIC-8 but occupies ~30% less board area. Land pattern number 90-0092 applies, and thermal resistance is 4.5mW/°C above +70°C (362mW max dissipation at TA = +70°C).
Can MAX4474EUA drive capacitive loads, and what is the minimum stable value?
Yes. The MAX4474EUA is characterized to drive ≥250pF capacitive loads without sustained oscillation, as stated in the Electrical Characteristics table under "Capacitive Load". This includes PCB trace capacitance and small filter capacitors. For loads >250pF, stability can be maintained using the 2pF–10pF feedback compensation technique shown in Figure 1 of the datasheet.
How does the supply current of MAX4474EUA vary with temperature and supply voltage?
According to Typical Operating Characteristics (Figures toc01 and toc02), MAX4474EUA supply current remains stable across temperature (−40°C to +85°C) and supply voltage (1.8V to 5.5V), varying only from 0.6µA to 0.9µA. At +25°C and +5V, typical IDD is 0.75µA per amplifier - making it exceptionally predictable for battery-life modeling in wide-environment deployments.
MAX4474EUA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.02V/µs
- Gain Bandwidth Product:
- 40 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 200 pA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 750nA (x2 Channels)
- Current - Output / Channel:
- 36 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:
- 8-uMAX/uSOP
MAX4474EUA FAQ
1.How can I place an order for MAX4474EUA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4474EUA 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 MAX4474EUA reliable?
The price and inventory of MAX4474EUA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4474EUA is usually 5 days.
3.What payment methods are accepted for MAX4474EUA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4474EUA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4474EUA?
MAX4474EUA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4474EUA 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 MAX4474EUA?
For technical support, including MAX4474EUA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4474EUA requirements.
6.How does Aetrix verify that MAX4474EUA is sourced from the original manufacturer or authorized distributors?
All MAX4474EUA 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 MAX4474EUA meets industry standards.
7.What is the process for return or replacement of MAX4474EUA?
All MAX4474EUA units undergo pre-shipment inspection (PSI). If there is an issue with MAX4474EUA, 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 MAX4474EUA part is unused and in its original packaging.
Return procedure for MAX4474EUA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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