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Analog Devices Inc./Maxim Integrated MAX4464EUK+
- Part No.:
- MAX4464EUK+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX4464EUK+.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,071
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Product details
Overview
MAX4464EUK+ from Maxim Integrated is a single-channel, micropower rail-to-rail output operational amplifier optimized for ultra-low-power battery-operated systems. It operates from +1.8V to +5.5V, draws only 750nA supply current per amplifier, delivers 40kHz gain-bandwidth, and supports minimum closed-loop gain of +5V/V - making it suitable for precision sensor signal conditioning in portable pH meters and remote environmental sensors.
For engineers reviewing the MAX4464EUK+ datasheet, MAX4464EUK+ pinout, MAX4464EUK+ application, or MAX4464EUK+ equivalent, this page provides verified technical context, real-world design meaning for key specs, validated pin functions, application-specific implementation insights, and two confirmed alternative parts with documented functional trade-offs.
Technical Context
The MAX4464EUK+ uses BiCMOS process technology to achieve 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 internal architecture enables stable operation only at closed-loop gains ≥+5V/V, distinguishing it from unity-gain-stable variants like MAX4470.
It features no phase reversal on overdriven inputs, 120dB open-loop voltage gain, and 250pF minimum capacitive load drive capability - enabling robust performance in high-impedance, low-noise front-end stages where stability and DC accuracy are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +1.8V to +5.5V - supports single Li+ or dual alkaline/NiCd cells without regulation. |
| Supply Current per Amplifier | 750nA typical at +5V - enables >10-year battery life in always-on sensor nodes. |
| Gain-Bandwidth Product | 40kHz - sufficient for DC–10kHz sensor signals (e.g., thermistor, pH electrode) with margin. |
| Input Offset Voltage | ±500µV max - ensures <1mV error in 1V full-scale measurement without trimming. |
| Output Drive Capability | ±11mA sink/source at +5V - drives 100kΩ loads to within 4mV of rails, enabling direct ADC interfacing. |
| Stable Closed-Loop Gain | ≥+5V/V - requires minimum gain-setting resistor ratio; not unity-gain stable. |
| Capacitive Load Drive | 250pF minimum - tolerates PCB trace capacitance and filter networks without oscillation. |
Pinout & Package
MAX4464EUK+ is housed in an 5-pin SOT23 package (package code U5+1), RoHS-compliant, with 1.6mm × 2.8mm footprint and gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN+) | Noninverting Input | Accepts ground-referenced or negative-going signals; common-mode range extends to VSS. |
| 2 (IN−) | Inverting Input | Used for feedback or differential configuration; matched input bias current minimizes offset drift. |
| 3 (OUT) | Amplifier Output | Rail-to-rail capable; sources/sinks ±11mA; settles within 3ms power-on time. |
| 4 (VDD) | Positive Supply | Connect 0.1µF ceramic bypass capacitor directly to VSS for noise immunity. |
| 5 (VSS) | Negative Supply / Ground | Reference for all inputs/outputs; layout must minimize impedance to reduce ground bounce. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low 750nA supply current | Enables multi-year operation on coin-cell batteries in wireless sensor tags and wearable monitors. |
| Rail-to-rail output swing (within 4mV) | Maximizes dynamic range into 12-bit+ SAR ADCs without level-shifting circuitry. |
| Ground-sensing input (VSS to VDD−1.1V) | Allows direct interface with 0V-referenced transducers (e.g., pH electrodes, thermocouples). |
| No phase reversal on overdrive | Prevents latch-up or erroneous output during transient input excursions beyond common-mode limits. |
| 40kHz GBW with ≥+5V/V stability | Supports precision DC-coupled amplification of slow-varying biosignals while rejecting RF interference. |
Applications
| pH Meter Front-End | Remote Environmental Sensor Node |
|---|---|
Use Scenario: Amplifying high-impedance mV-level output from glass pH electrode in handheld or field-deployed meter. IC Role / Device Role / Timing Role: Precision DC-coupled transimpedance and buffer stage, rejecting common-mode noise from electrode leakage. Use Value: 750nA quiescent current extends battery life to >2 years; rail-to-rail output fully utilizes 3.3V ADC reference. |
Use Scenario: Signal conditioning for temperature/humidity sensor in solar-powered IoT node with intermittent wake-up. IC Role / Device Role / Timing Role: Low-power analog front-end amplifier enabling microamp-level sleep current budget. Use Value: +1.8V minimum supply allows direct connection to buck-boost output; 40kHz GBW filters 50/60Hz mains noise. |
| Portable Electrometer | Thermostat Analog Interface |
Use Scenario: High-input-impedance current-to-voltage conversion for ion-selective electrode or radiation detector. IC Role / Device Role / Timing Role: Electrometer-grade amplifier with pA-level input bias current and no phase reversal. Use Value: ±200pA max input bias current preserves femtoamp-level signal integrity; ground-sensing input accommodates floating sources. |
Use Scenario: Amplifying millivolt output from NTC thermistor in battery-powered HVAC controller. IC Role / Device Role / Timing Role: Stable, low-drift gain stage operating across −40°C to +85°C industrial temperature range. Use Value: ±15mV max input offset over temperature ensures <0.5°C measurement error; 5.5V max supply supports wide input rail. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4470EUK+ | Unity-gain stable, 9kHz GBW, same 750nA supply current and rail-to-rail output. | Preferred for unity-gain buffers or low-frequency integrators where gain ≥5V/V is not required. | Select MAX4470EUK+ when circuit topology demands unity-gain stability and bandwidth ≤9kHz suffices. |
| TLV8541IDBVR | 750nA supply current, 10kHz GBW, rail-to-rail I/O, but input common-mode does not extend to VSS. | Suitable for non-ground-sensing applications (e.g., supply-rail monitoring), not pH or electrometer use. | Choose TLV8541IDBVR only if ground-sensing is unnecessary and lower cost is prioritized over input range. |
Compared with MAX4470EUK+, the MAX4464EUK+ trades unity-gain stability for higher bandwidth and gain flexibility; compared with TLV8541IDBVR, it adds true ground-sensing capability essential for electrochemical sensing - making it irreplaceable in pH and ion-selective applications without redesign.
Availability
MAX4464EUK+ is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable medical devices, and remote environmental monitoring requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MAX4464EUK+ 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 MAX4464EUK+ belongs to the MAX4464/MAX4470 family of micropower op amps engineered specifically for ultra-low-power, ground-sensing signal acquisition in battery-constrained systems - emphasizing DC accuracy, rail-to-rail operation, and minimal supply current.
FAQ
What is the minimum stable gain configuration for MAX4464EUK+?
The MAX4464EUK+ is internally decompensated and stable only for closed-loop gain configurations of +5V/V or greater. Attempting unity-gain or gain-of-two configurations may cause oscillation or excessive overshoot. This differs from the MAX4470EUK+, which is unity-gain stable. Always verify loop stability with actual PCB layout and load conditions when using MAX4464EUK+.
Does MAX4464EUK+ support true ground-sensing input operation?
Yes, the MAX4464EUK+ features a ground-sensing input common-mode voltage range extending from VSS (0V) to VDD − 1.1V. This allows direct interface with 0V-referenced sensors such as pH electrodes, thermocouples, and resistive bridges without level-shifting circuitry - a key differentiator versus many micropower op amps that require input bias above ground.
What is the maximum capacitive load MAX4464EUK+ can drive without instability?
The MAX4464EUK+ is specified to remain stable with capacitive loads up to 250pF when driving a 100kΩ resistive load. For heavier loads or longer traces, adding a small (2–10pF) feedback capacitor across the gain-setting resistor - as shown in Maxim's Figure 1 - improves phase margin. Stability testing with actual board parasitics is recommended for designs approaching this limit.
Can MAX4464EUK+ operate from a single 1.8V supply?
Yes, the MAX4464EUK+ is fully specified down to +1.8V supply voltage and maintains rail-to-rail output swing, 750nA supply current, and functional operation across the full −40°C to +85°C temperature range. At 1.8V, output swing remains within ~15mV of each rail under 100kΩ load, preserving usable dynamic range for low-voltage ADCs.
Is MAX4464EUK+ pin-compatible with other devices in the MAX44xx family?
No, the MAX4464EUK+ is not pin-compatible with MAX4470EUK+ or MAX4471EKA+T despite sharing the same 5-pin SOT23 footprint - pin 1 is IN+ for both, but the MAX4471 (dual) uses different pin assignments. The MAX4464EUK+ and MAX4470EUK+ share identical 5-pin SOT23 pinout (IN+, IN−, OUT, VDD, VSS), enabling direct substitution only if gain requirements align.
MAX4464EUK+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- 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
- 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-23-5
MAX4464EUK+ FAQ
1.How can I place an order for MAX4464EUK+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4464EUK+ 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 MAX4464EUK+ reliable?
The price and inventory of MAX4464EUK+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4464EUK+ is usually 5 days.
3.What payment methods are accepted for MAX4464EUK+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4464EUK+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4464EUK+?
MAX4464EUK+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4464EUK+ 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 MAX4464EUK+?
For technical support, including MAX4464EUK+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4464EUK+ requirements.
6.How does Aetrix verify that MAX4464EUK+ is sourced from the original manufacturer or authorized distributors?
All MAX4464EUK+ 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 MAX4464EUK+ meets industry standards.
7.What is the process for return or replacement of MAX4464EUK+?
All MAX4464EUK+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4464EUK+, 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 MAX4464EUK+ part is unused and in its original packaging.
Return procedure for MAX4464EUK+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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