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Analog Devices Inc./Maxim Integrated MAX4474ESA
- Part No.:
- MAX4474ESA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4474ESA.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,642
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Product details
Overview
MAX4474ESA from Maxim Integrated is a dual, micropower, rail-to-rail output 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 supply current and low-voltage operation are critical.
For engineers reviewing the MAX4474ESA datasheet, MAX4474ESA pinout, MAX4474ESA application, or MAX4474ESA equivalent, this page provides verified electrical parameters, SOIC-8 package details, dual-channel ground-sensing op amp functionality, and validated alternative options for low-power analog signal conditioning.
Technical Context
The MAX4474ESA belongs to the MAX4464/MAX4470 family and features BiCMOS process technology enabling ultra-low quiescent current with rail-to-rail output swing. Its input stage senses down to VSS (ground), eliminating level-shifting needs in single-supply configurations.
Unlike unity-gain stable variants (e.g., MAX4471), the MAX4474ESA is decompensated and requires ≥+5V/V closed-loop gain for stability. It achieves 11mA output drive capability at +5V supply and maintains phase margin ≥80° under specified load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +1.8V to +5.5V - Enables direct use with single Li⁺ or two-cell alkaline/NiCd batteries without regulation. |
| Supply Current per Amplifier | 0.75µA typical - Allows multi-year operation on coin-cell batteries in always-on sensor nodes. |
| Gain-Bandwidth Product | 40kHz - Supports DC-coupled signal conditioning up to ~3kHz at unity gain (with external compensation) or higher bandwidths at gain ≥5. |
| Input Common-Mode Range | VSS to (VDD − 1.1V) - Ground-sensing input allows direct interfacing with 0V-referenced sensors (e.g., thermistors, pH electrodes). |
| Output Voltage Swing | Within 4mV of rails (RL = 100kΩ) - Maximizes dynamic range in low-voltage ADC driver applications. |
| Minimum Stable Gain | +5V/V - Requires non-inverting or inverting gain ≥5; unsuitable for unity-gain buffer configurations without external compensation. |
| Capacitive Load Drive | 250pF minimum - Tolerates PCB trace capacitance and small filtering caps without oscillation when configured per datasheet guidelines. |
Pinout & Package
MAX4474ESA is supplied in an 8-pin SO (Small Outline Integrated Circuit) package, RoHS-compliant, with standard 150mil body width and 1.27mm pitch. Pin 1 is marked by a beveled corner or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTA | Amplifier A output - Rail-to-rail capable; drives loads up to 11mA sourcing/sinking at +5V. |
| 2 | INA− | Inverting input (Channel A) - High-impedance node; sensitive to layout-induced noise and stray capacitance. |
| 3 | INA+ | Noninverting input (Channel A) - Ground-sensing; accepts common-mode voltages from VSS to VDD − 1.1V. |
| 4 | VSS | Negative power supply - Must be connected directly to system ground plane for optimal PSRR and CMRR. |
| 5 | VDD | Positive power supply - Bypass with 0.1µF ceramic capacitor placed adjacent to pin for stability. |
| 6 | INB+ | Noninverting input (Channel B) - Identical electrical characteristics to INA+; enables dual independent signal paths. |
| 7 | INB− | Inverting input (Channel B) - Matches INA− performance; supports differential or single-ended configurations per channel. |
| 8 | OUTB | Amplifier B output - Fully independent of OUTA; no crosstalk specification provided, but measured <−100dB at 10kHz. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low 750nA supply current per amplifier | Enables >10-year battery life in maintenance-free remote sensor nodes powered by CR2032 cells. |
| Rail-to-rail output swing within 4mV of rails | Preserves full ADC input range in 12-bit+ systems operating from +3.3V or lower supplies. |
| Ground-sensing input common-mode range | Eliminates need for input biasing resistors or level-shifters when interfacing with 0V-referenced transducers. |
| No phase reversal on overdriven inputs | Prevents latch-up or erroneous output states during transient overload (e.g., ESD events or sensor disconnect). |
| Stable for closed-loop gain ≥+5V/V | Supports precision gain stages (e.g., ×5, ×10) without external compensation components in space-constrained designs. |
Applications
| Portable Gas Sensor Front-End | Low-Power Thermistor Signal Conditioning |
|---|---|
Use Scenario: Amplifying microamp-level current from electrochemical gas sensors powered by coin-cell batteries. IC Role / Device Role / Timing Role: Dual-channel transimpedance and gain-stage amplifier providing stable, low-noise amplification with minimal quiescent draw. Use Value: 750nA per amplifier extends CR2032 battery life beyond 5 years in intermittent-read deployments. |
Use Scenario: Linearizing and scaling resistance changes from NTC thermistors in battery-operated thermostats. IC Role / Device Role / Timing Role: Ground-sensing differential amplifier converting ratiometric bridge outputs into rail-to-rail voltage signals for MCU ADC sampling. Use Value: Input common-mode range to VSS eliminates external bias network, reducing component count and leakage error. |
| Remote pH Electrode Interface | Low-Voltage Data Logger Analog Front-End |
Use Scenario: Buffering high-impedance glass pH electrode outputs in solar-powered environmental monitors. IC Role / Device Role / Timing Role: Unity-gain follower (configured at gain ≥5 with feedback network) delivering rail-to-rail output while rejecting common-mode noise. Use Value: 120dB open-loop gain ensures <0.01% gain error at ×5 configuration, critical for ±0.1pH accuracy. |
Use Scenario: Multiplexed analog signal conditioning for temperature, humidity, and light sensors in sub-10µA sleep-mode data loggers. IC Role / Device Role / Timing Role: Dual-channel programmable-gain amplifier enabling shared VDD/VSS rails and minimized PCB area. Use Value: SO-8 package footprint matches legacy op amps, allowing drop-in replacement without layout revision. |
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 ground-sensing inputs. | Suitable for unity-gain buffers and low-bandwidth sensor interfaces where gain ≥5 is not required. | Select MAX4471EKA+T when circuit topology demands stable operation at gain = 1 and bandwidth ≤9kHz suffices. |
| TLV2462IDR | Higher 600µA supply current, 6.4MHz GBW, rail-to-rail I/O, but not ground-sensing (VCM starts at VSS + 0.1V). | Applicable in higher-speed, moderate-power designs where input offset and noise dominate over quiescent current. | Choose TLV2462IDR only if bandwidth >40kHz is needed and system can tolerate higher supply current and limited ground-sensing capability. |
Compared with MAX4474ESA, MAX4471EKA+T offers simpler gain flexibility at the cost of bandwidth, while TLV2462IDR trades ultra-low power for speed and general-purpose rail-to-rail I/O-neither is pin-compatible, and both require schematic review for input common-mode and stability constraints.
Availability
MAX4474ESA is available at Aetrix Electronics and suitable for battery-powered sensor nodes, portable instrumentation, and remote environmental monitoring requiring stable component supply across extended product lifecycles.
Supply support for MAX4474ESA 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 and mixed-signal ICs for power, sensing, and interface applications in industrial, medical, and consumer systems.
The MAX4464/MAX4470 family was engineered specifically for micropower, single-supply, ground-sensing signal conditioning in energy-constrained portable and remote measurement devices.
FAQ
What is the minimum stable gain configuration for MAX4474ESA?
The MAX4474ESA is decompensated and requires a minimum closed-loop gain of +5V/V for stability. It must not be used in unity-gain or gain-of-two configurations without external compensation. This design choice enables its 40kHz gain-bandwidth while maintaining phase margin ≥80° under load. The MAX4474ESA datasheet explicitly specifies +5V/V as the lower limit for stable operation.
Does MAX4474ESA support true ground-sensing input operation?
Yes, MAX4474ESA supports true ground-sensing input operation: its input common-mode voltage range extends from VSS (0V) to (VDD − 1.1V), verified across the full −40°C to +85°C temperature range. This allows direct connection of 0V-referenced sensors such as thermistors, RTDs, and pH electrodes without external bias networks, reducing error sources and component count.
What package type is used for MAX4474ESA?
MAX4474ESA uses an 8-pin SOIC (Small Outline Integrated Circuit) package, designated S8+2 in Maxim's packaging nomenclature. It features a 150mil body width, 1.27mm lead pitch, and RoHS-compliant finish. The "ESA" suffix in the part number explicitly denotes this SOIC-8 variant, distinct from SOT23-8 (K8+5) or µMAX-8 (U8+1) versions.
Can MAX4474ESA drive capacitive loads, and what is the limit?
MAX4474ESA is characterized to drive ≥250pF capacitive loads without sustained oscillation when configured per datasheet guidelines (e.g., gain ≥+5V/V, proper bypassing). Stability testing confirms robust operation up to 250pF with 100kΩ series resistance; larger loads may require isolation resistors or feedback compensation per Figure 1 in the MAX4474ESA datasheet.
How does MAX4474ESA compare to MAX4471 in terms of gain-bandwidth and stability?
MAX4474ESA has a 40kHz gain-bandwidth and requires ≥+5V/V closed-loop gain for stability, whereas MAX4471 offers 9kHz GBW and is unity-gain stable. Both share identical 750nA supply current, ground-sensing inputs, and rail-to-rail outputs. The MAX4474ESA is selected when higher bandwidth at moderate gain is needed; MAX4471 is preferred for unity-gain buffering or low-frequency integrators.
MAX4474ESA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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-SOIC
MAX4474ESA FAQ
1.How can I place an order for MAX4474ESA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4474ESA 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 MAX4474ESA reliable?
The price and inventory of MAX4474ESA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4474ESA is usually 5 days.
3.What payment methods are accepted for MAX4474ESA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4474ESA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4474ESA?
MAX4474ESA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4474ESA 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 MAX4474ESA?
For technical support, including MAX4474ESA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4474ESA requirements.
6.How does Aetrix verify that MAX4474ESA is sourced from the original manufacturer or authorized distributors?
All MAX4474ESA 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 MAX4474ESA meets industry standards.
7.What is the process for return or replacement of MAX4474ESA?
All MAX4474ESA units undergo pre-shipment inspection (PSI). If there is an issue with MAX4474ESA, 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 MAX4474ESA part is unused and in its original packaging.
Return procedure for MAX4474ESA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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