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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:279
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Product details
Overview
MAX4474ESA+ 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 swing are critical.
For engineers reviewing the MAX4474ESA+ datasheet, MAX4474ESA+ pinout, MAX4474ESA+ application, or MAX4474ESA+ equivalent, this page provides verified technical context, package-specific pin mapping, real-world application constraints, and validated alternative options for low-voltage, micropower op amp selection.
Technical Context
The MAX4474ESA+ belongs to the MAX4464/MAX4470 family and features BiCMOS process technology enabling ultra-low supply current while maintaining rail-to-rail output drive (±11mA at +5V) and ground-sensing inputs (VCM = VSS to VDD − 1.1V). Its decompensated architecture ensures stability only at closed-loop gains ≥+5V/V - unlike unity-gain-stable variants such as MAX4471.
It achieves 40kHz gain-bandwidth with 80° phase margin (CL = 250pF, RL = 1MΩ), supports capacitive loads up to 250pF without oscillation, and exhibits no phase reversal under overdriven input conditions - a key reliability feature for sensor signal conditioning in uncontrolled input environments.
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 without level-shifting. |
| Supply Current per Amplifier | 750nA typical at +5V - allows multi-year battery life in always-on remote sensors and wearable devices. |
| Gain-Bandwidth Product | 40kHz - sufficient for DC–10kHz sensor amplification (e.g., thermistors, pH electrodes, strain gauges) with stable +5V/V or higher gain. |
| Input Offset Voltage | ±500µV typical - minimizes DC error in precision low-level signal amplification without trimming. |
| Output Drive Capability | ±11mA at +5V - drives 100kΩ loads to within 4mV of rails and supports moderate-current analog outputs (e.g., driving ADC reference buffers). |
| Input Common-Mode Range | VSS to VDD − 1.1V - enables ground-referenced sensing (e.g., current shunt monitoring, thermocouple cold-junction compensation). |
| Capacitive Load Stability | 250pF minimum - accommodates PCB trace capacitance and filtering networks without external compensation in most layouts. |
Pinout & Package
MAX4474ESA+ is supplied in an 8-pin SO (Small Outline) package with standard SOIC-8 footprint (package code S8+2). Pin 1 is marked by a beveled corner or dot; device orientation follows JEDEC MS-012.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTA | Amplifier A output - rail-to-rail capable; must avoid >250pF capacitive loading without series resistor or feedback compensation. |
| 2 | INA− | Inverting input for Channel A - high-impedance node; sensitive to stray capacitance; requires tight layout and guard traces. |
| 3 | INA+ | Noninverting input for Channel A - accepts signals down to VSS; enables ground-referenced sensor interfacing. |
| 4 | VSS | Negative power supply - must be connected directly to low-impedance ground plane; shared return for both amplifiers. |
| 5 | VDD | Positive power supply - bypass with 0.1µF ceramic capacitor placed <1mm from pin to minimize PSRR degradation. |
| 6 | INB+ | Noninverting input for Channel B - identical functionality to Pin 3; independent channel for differential or dual-sensor use. |
| 7 | INB− | Inverting input for Channel B - matches Pin 2 electrical behavior; supports independent second amplifier path. |
| 8 | OUTB | Amplifier B output - electrically isolated from OUTA; enables dual-channel signal conditioning on single die. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Drives to within 4mV of VDD or VSS with 100kΩ load - preserves full dynamic range for low-voltage ADCs (e.g., 12-bit SAR at 3.3V). |
| Ground-sensing input common-mode range | VCM includes VSS - eliminates need for level-shifting circuitry when measuring signals referenced to system ground (e.g., shunt-based current sensing). |
| No phase reversal on overdrive | Guaranteed absence of output polarity inversion during input overload - prevents latch-up or erroneous control decisions in safety-critical sensor paths. |
| Stable at G ≥ +5V/V | Internally decompensated for higher bandwidth - enables faster settling than unity-gain-stable parts (e.g., MAX4471) when gain requirements permit. |
| 250pF capacitive load capability | Operates stably into typical PCB trace + filter capacitor loads - reduces need for external isolation resistors in anti-aliasing or EMI-filtered designs. |
Applications
| Portable pH Meters | Solar-Powered Remote Sensors |
|---|---|
|
Use Scenario: Amplifying mV-level output from glass electrode in handheld field pH meters powered by coin-cell batteries. IC Role / Device Role / Timing Role: Dual-channel transimpedance and buffer amplifier - one channel conditions electrode signal, the other drives reference electrode or ADC driver stage. Use Value: 750nA quiescent current extends battery life beyond 2 years; ground-sensing input enables direct connection to electrode's low-impedance reference node. |
Use Scenario: Signal conditioning for temperature/humidity sensors in off-grid environmental monitoring nodes powered by small solar panels and supercapacitors. IC Role / Device Role / Timing Role: Low-power dual op amp front-end - one channel amplifies thermistor voltage divider, the other buffers humidity sensor output before multiplexed ADC sampling. Use Value: 1.8V minimum supply allows operation during low-light periods when harvested voltage drops below 2.0V; rail-to-rail output maximizes usable ADC input range. |
| Wireless Thermostat Sensor Nodes | Electrometer-Grade Leakage Current Detection |
|
Use Scenario: Battery-operated HVAC sensor module measuring ambient temperature and occupancy via PIR, transmitting data via sub-GHz RF. IC Role / Device Role / Timing Role: Dual amplifier for RTD signal conditioning and PIR signal amplification - both channels operate in burst mode synchronized with RF transmit intervals. Use Value: Ultra-low IDD enables >5-year shelf life on CR2032; decompensated GBW supports fast PIR pulse response without sacrificing DC accuracy for RTD measurement. |
Use Scenario: High-impedance current-to-voltage conversion in portable insulation resistance testers or electrochemical analyzers. IC Role / Device Role / Timing Role: Electrometer amplifier with guarded input - configured as transimpedance amplifier with T-network feedback to achieve >10⁹Ω effective Rf. Use Value: Input bias current ≤200pA (typical) minimizes offset error in pA-range current measurements; no phase reversal prevents false fault detection during transient leakage events. |
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 IDD and 1.8V–5.5V supply range; offered in 8-pin SOT23. | Supports G = +1V/V configurations (e.g., voltage followers, active filters) where MAX4474ESA+ cannot be used. | Select MAX4471EKA+T when unity-gain stability is required; accept lower bandwidth and identical power consumption. |
| TLV2462IDR | 2.5V–6V supply, 600nA IDD, 6.4kHz GBW, rail-to-rail I/O, unity-gain stable; SO-8 package, TI-manufactured. | Limited to ≥2.5V operation - incompatible with 1.8V or single-cell Li⁺ systems where MAX4474ESA+ functions. | Choose TLV2462IDR only if system uses ≥2.5V supply and requires broader manufacturer support; verify input common-mode range excludes ground. |
Compared with MAX4474ESA+, MAX4471EKA+T trades bandwidth for universal gain flexibility, while TLV2462IDR offers lower current but sacrifices low-voltage operation and ground-sensing capability - making MAX4474ESA+ uniquely suited for sub-2V, dual-channel, gain ≥+5V/V sensor interfaces.
Availability
MAX4474ESA+ is available at Aetrix Electronics and suitable for portable instrumentation, remote sensor nodes, and battery-powered thermostats requiring stable component supply across extended production 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, mixed-signal, and power management ICs for demanding industrial, medical, and communications applications.
The MAX4464/MAX4470 family was engineered specifically for micropower, single-supply sensor signal conditioning - prioritizing ultra-low IDD, ground-referenced inputs, and rail-to-rail outputs in space-constrained, battery-dependent systems.
FAQ
What is the minimum stable gain configuration for MAX4474ESA+?
The MAX4474ESA+ is internally decompensated and stable only for closed-loop gains of +5V/V or greater. Using it at unity gain or G = +2V/V risks oscillation and degraded phase margin. This differs from unity-gain-stable variants like MAX4471. Always verify stability with actual load and PCB parasitics using the gain-phase plots in the MAX4474ESA+ datasheet Figure 32–33.
Does MAX4474ESA+ support true ground-referenced input operation?
Yes. The MAX4474ESA+ guarantees an input common-mode voltage range from VSS to VDD − 1.1V, enabling direct connection of sensors referenced to system ground - such as current-shunt monitors or thermocouple cold-junction circuits - without level-shifting components. This is confirmed in the Electrical Characteristics table under "Input Common-Mode Voltage Range".
Can MAX4474ESA+ drive capacitive loads without external compensation?
Yes - the MAX4474ESA+ is characterized for stable operation with up to 250pF capacitive load (per amplifier) when driving resistive loads ≥10kΩ. For heavier loads or marginal layouts, adding a 2–10pF capacitor across the feedback resistor (as shown in Figure 1 of the datasheet) restores phase margin. Stability testing with actual board parasitics is recommended for production validation.
What is the output voltage swing capability of MAX4474ESA+ at 100kΩ load?
At VDD = +5V and 100kΩ load, the MAX4474ESA+ output swings to within 4mV of either rail (VDD − VOH ≤ 4mV and VOL − VSS ≤ 4mV). This rail-to-rail performance is specified in the "Output Voltage Swing" section of the Electrical Characteristics table and enables full utilization of 12-bit or 16-bit ADC input ranges in low-voltage systems.
Is MAX4474ESA+ RoHS-compliant and lead-free?
Yes. The "+" suffix in MAX4474ESA+ denotes a lead(Pb)-free and RoHS-compliant package, per Maxim Integrated's ordering information table. The SO-8 package (S8+2) meets JEDEC J-STD-020 moisture sensitivity level 1 and is compatible with standard lead-free reflow profiles up to +260°C peak temperature.
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:
- Active
- 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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