My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX4474EKA+T
- Part No.:
- MAX4474EKA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-8
- Datasheet:
-
MAX4474EKA+T.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:2,250
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX4474EKA+T 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 supply current and input common-mode range down to ground are critical.
For engineers reviewing the MAX4474EKA+T datasheet, MAX4474EKA+T pinout, MAX4474EKA+T application, or MAX4474EKA+T equivalent, this page provides verified specifications, package mapping to 8-pin SOT23, confirmed dual-channel rail-to-rail output behavior, stable gain ≥5V/V operation, and validated alternative options for low-power analog signal conditioning.
Technical Context
The MAX4474EKA+T implements a BiCMOS input stage enabling ground-sensing input common-mode range (VSS to VDD − 1.1V) and rail-to-rail output swing within 4mV of either rail under 100kΩ load. Its decompensated architecture ensures stability only at closed-loop gains ≥+5V/V, distinguishing it from unity-gain-stable variants like MAX4471.
Each amplifier channel sources/sinks ±11mA at +5V supply and achieves 120dB open-loop voltage gain with 500µV typical input offset voltage. The 40kHz gain-bandwidth product and 80° phase margin support precision DC-coupled amplification and low-frequency active filtering in energy-constrained designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +1.8V to +5.5V - enables direct operation from single Li⁺ or two-cell alkaline/NiCd batteries without regulation. |
| Supply Current per Amplifier | 0.75µA typical at +5V - allows multi-year battery life in always-on remote sensors and wearables. |
| Gain-Bandwidth Product | 40kHz - supports stable amplification up to ~8kHz at gain = 5, suitable for ECG, pH, and thermistor signal chains. |
| Minimum Stable Gain | +5V/V - requires external feedback network design with gain ≥5; not usable as unity-gain buffer. |
| Input Offset Voltage | ±0.5mV typical - ensures <10µV error contribution in 10mV full-scale sensor outputs (e.g., RTD bridges). |
| Rail-to-Rail Output Swing | Within 4mV of VDD/VSS at 100kΩ load - maximizes dynamic range in 1.8V–3.3V ADC interfaces. |
| Input Common-Mode Range | VSS to (VDD − 1.1V) - accepts signals referenced to ground in single-supply configurations without level-shifting. |
Pinout & Package
MAX4474EKA+T is packaged in an 8-pin SOT23 (package code K8+5), RoHS-compliant, with exposed pad not electrically connected. Pin spacing is 0.65mm, body dimensions 3.0mm × 1.7mm × 1.3mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTA | Amplifier A output - drives external load or feedback network; rail-to-rail capable with 11mA drive strength. |
| 2 | INA− | Inverting input for Channel A - high-impedance node; sensitive to PCB leakage and stray capacitance. |
| 3 | INA+ | Noninverting input for Channel A - accepts ground-referenced sensor signals directly. |
| 4 | V− (VSS) | Negative power supply - must be connected to system ground; serves as reference for input common-mode range. |
| 5 | V+ (VDD) | Positive power supply - bypass with 0.1µF ceramic capacitor placed adjacent to pin for stability. |
| 6 | INB+ | Noninverting input for Channel B - independent of Channel A; enables dual-sensor or differential pair configuration. |
| 7 | INB− | Inverting input for Channel B - matched to INA− in offset and bias current for consistent dual-channel performance. |
| 8 | OUTB | Amplifier B output - fully independent output stage; shares same rail-to-rail and drive capability as OUTA. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low 750nA supply current per amplifier | Enables >10-year battery life in coin-cell-powered IoT nodes operating at 1Hz sampling rate. |
| Ground-sensing input common-mode range | Eliminates need for input biasing resistors or level-shifters when interfacing with grounded-output transducers (e.g., thermocouples, strain gauges). |
| No phase reversal on overdriven inputs | Prevents catastrophic latch-up or signal inversion during transient overload-critical in unattended remote monitoring. |
| Rail-to-rail output with 11mA drive | Supports direct driving of 10kΩ ADC inputs or low-impedance filters without external buffers. |
| Stable at gain ≥+5V/V | Reduces external compensation complexity versus unity-gain-stable op amps; improves noise gain control in transimpedance stages. |
Applications
| Portable pH Meter Front-End | Low-Power Thermistor Signal Conditioning |
|---|---|
Use Scenario: Amplifying mV-level output from glass electrode pH probe in handheld field meter powered by two AA cells. IC Role / Device Role / Timing Role: Dual-channel configured as precision noninverting amplifier (Channel A) and reference buffer (Channel B) for ratiometric ADC measurement. Use Value: Ground-sensing inputs accept probe's negative output directly; 750nA quiescent current extends battery life to >2 years at 1 sample/minute. |
Use Scenario: Linearizing and scaling NTC thermistor resistance changes in battery-operated HVAC thermostat. IC Role / Device Role / Timing Role: Dual op amp used in constant-current excitation circuit and gain-stage amplifier for 10-bit microcontroller ADC. Use Value: Rail-to-rail output ensures full utilization of 3.3V ADC reference; 40kHz GBW supports fast temperature step response without overshoot. |
| Solar-Powered Environmental Sensor Node | Remote Industrial Transmitter Interface |
Use Scenario: Signal conditioning for photodiode and humidity sensor in off-grid solar-powered weather station. IC Role / Device Role / Timing Role: One channel amplifies photodiode current via transimpedance configuration; second channel buffers reference voltage for ADC. Use Value: 1.8V minimum supply allows operation during low-light battery discharge; 250pF capacitive load tolerance simplifies anti-alias filter integration. |
Use Scenario: Isolated 4–20mA loop transmitter front-end converting millivolt sensor outputs in hazardous-area industrial enclosures. IC Role / Device Role / Timing Role: Dual amplifier implements precision I/V conversion and output buffering before isolation stage. Use Value: Input offset voltage ≤±7mV ensures <0.1% FSR error across -40°C to +85°C; 120dB AVOL maintains accuracy under varying loop impedance. |
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 8-pin SOT23 package and pinout. | Accepts gain = 1 configurations (e.g., voltage followers); lower bandwidth limits use in higher-frequency sensor signals. | Select when unity-gain operation or lower supply current variation over temperature is required; verify bandwidth sufficiency for target signal frequency. |
| TLV2462IDR | 2.7–6V supply range, 600nA supply current, 6.4MHz GBW, SO-8 package. | Higher bandwidth and wider supply range but lacks guaranteed ground-sensing input; not specified for VCM = VSS. | Choose for higher-speed applications (>10kHz) where ground-sensing is not mandatory and 2.7V minimum supply is acceptable. |
Compared with MAX4471EKA+T, MAX4474EKA+T offers higher bandwidth and higher minimum gain stability-ideal for fixed-gain precision amplification. Versus TLV2462IDR, MAX4474EKA+T provides guaranteed ground-referenced input operation and lower supply current at sub-2V rails, at the cost of bandwidth and supply voltage headroom.
Availability
MAX4474EKA+T is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable medical devices, and remote environmental sensing requiring stable component supply with long-term lifecycle assurance.
Supply support for MAX4474EKA+T 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 connectivity in constrained environments.
The MAX4474EKA+T belongs to the MAX4464/MAX4470 family of micropower rail-to-rail op amps, engineered specifically for ultra-low-voltage, ultra-low-current signal conditioning in battery- and energy-harvesting–powered systems.
FAQ
What is the minimum stable gain configuration for MAX4474EKA+T?
The MAX4474EKA+T is decompensated and stable only for closed-loop gains of +5V/V or greater. It must not be used in unity-gain or gain-of-two configurations, as this may cause oscillation. Designers must ensure feedback networks enforce minimum gain ≥5, verified through stability analysis and load testing per the datasheet's phase margin (80°) and capacitive load (250pF) specifications. This differs from the unity-gain-stable MAX4471EKA+T in the same family.
Does MAX4474EKA+T support true ground-sensing input operation?
Yes, MAX4474EKA+T guarantees input common-mode voltage range from VSS (ground) to (VDD − 1.1V), enabling direct connection of grounded-output sensors such as thermocouples, RTDs, and bridge circuits without external level-shifting components. This is confirmed in the Electrical Characteristics table (VCM min = VSS) and Applications Information section, and distinguishes it from op amps requiring input bias above ground.
What package type and footprint does MAX4474EKA+T use?
MAX4474EKA+T uses an 8-pin SOT23 package (package code K8+5), with land pattern documented in Maxim package drawing 21-0078. It measures 3.0mm × 1.7mm × 1.3mm, has 0.65mm pin pitch, and is RoHS-compliant (+ suffix). The pinout matches industry-standard dual op amp SOT23 layouts, with Channel A on pins 1–3–4 and Channel B on pins 6–7–8, sharing VDD (pin 5) and VSS (pin 4).
Can MAX4474EKA+T drive capacitive loads, and what is its maximum rated value?
MAX4474EKA+T is characterized for stable operation with capacitive loads up to 250pF minimum, as stated in the Electrical Characteristics table. Stability testing confirms no sustained oscillations at this level with resistive loads ≥10kΩ. For loads exceeding 250pF, external compensation (e.g., 2–10pF feedback capacitor per Figure 1 in the datasheet) is required. Layout best practices-short traces, local bypassing, and minimized input node capacitance-are essential to maintain stability.
How does the supply current of MAX4474EKA+T vary with temperature and supply voltage?
MAX4474EKA+T exhibits typical supply current of 0.75µA at +5V and +25°C, rising to ≤1.5µA across the full −40°C to +85°C operating range. Over supply voltage, current remains nearly flat from +1.8V to +5.5V (see Typical Operating Characteristics figure toc01), confirming robust micropower behavior across battery discharge profiles. This stability enables predictable battery-life estimation without derating for voltage or temperature drift.
MAX4474EKA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Tape & Reel (TR)
- 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:
- SOT-23-8
MAX4474EKA+T FAQ
1.How can I place an order for MAX4474EKA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4474EKA+T 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 MAX4474EKA+T reliable?
The price and inventory of MAX4474EKA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4474EKA+T is usually 5 days.
3.What payment methods are accepted for MAX4474EKA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4474EKA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4474EKA+T?
MAX4474EKA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4474EKA+T 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 MAX4474EKA+T?
For technical support, including MAX4474EKA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4474EKA+T requirements.
6.How does Aetrix verify that MAX4474EKA+T is sourced from the original manufacturer or authorized distributors?
All MAX4474EKA+T 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 MAX4474EKA+T meets industry standards.
7.What is the process for return or replacement of MAX4474EKA+T?
All MAX4474EKA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4474EKA+T, 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 MAX4474EKA+T part is unused and in its original packaging.
Return procedure for MAX4474EKA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX4474EKA+T Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
