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Analog Devices Inc./Maxim Integrated MAX4464EXK+T
- Part No.:
- MAX4464EXK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
MAX4464EXK+T.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,603
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Product details
Overview
The MAX4464EXK+T from Maxim Integrated is a single-channel, micropower rail-to-rail 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 is stable for closed-loop gains ≥+5V/V. It is used in precision sensor signal conditioning within portable pH meters and remote environmental sensors.
For engineers reviewing the MAX4464EXK+T datasheet, MAX4464EXK+T pinout, MAX4464EXK+T application, or MAX4464EXK+T equivalent, this page provides verified electrical parameters, SC70-5 package layout guidance, ground-sensing input behavior, rail-to-rail output swing under 100kΩ load, and validated alternative options for low-voltage, high-impedance analog front-ends.
Technical Context
The MAX4464EXK+T implements a BiCMOS input stage enabling ground-sensing common-mode operation (VCM = VSS to VDD − 1.1V) and rail-to-rail output swing within 4mV of either rail at 100kΩ load. Its decompensated architecture achieves 40kHz gain-bandwidth while maintaining stability only at closed-loop gains ≥+5V/V - unlike unity-gain-stable variants in the same family.
It features no phase reversal on overdriven inputs, 120dB open-loop voltage gain, and 500µV typical input offset voltage. Input bias current remains below 1.5nA over −40°C to +85°C, supporting high-impedance source interfacing in electrometer-grade applications such as pH electrode amplification.
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 amp) | 750nA typ. at +5V - enables multi-year battery life in always-on remote sensors. |
| Gain-Bandwidth Product | 40kHz - sufficient for DC–10kHz sensor signal conditioning with ≥+5V/V gain. |
| Input Offset Voltage | ±0.5mV typ., ±7mV max. - ensures <10µV error in 20mV full-scale pH electrode outputs. |
| Output Swing (100kΩ) | VOH = VDD − 4mV, VOL = VSS + 4mV - maximizes dynamic range in 1.8V-supplied systems. |
| Stable Closed-Loop Gain | ≥+5V/V - requires minimum gain-setting resistor ratio; not unity-gain compatible. |
| Capacitive Load Drive | 250pF min. - tolerates PCB trace capacitance without oscillation in compact layouts. |
Pinout & Package
MAX4464EXK+T is supplied in a 5-pin SC70 package (package code X5+1), measuring 2.0mm × 1.25mm × 0.9mm, RoHS-compliant and moisture-sensitive level 1.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | IN+ | Noninverting input - accepts ground-referenced signals down to VSS with >70dB CMRR. |
| 2 | IN− | Inverting input - forms high-impedance differential pair with IN+; no phase reversal on overdrive. |
| 3 | OUT | Amplifier output - rail-to-rail capable, sources/sinks 11mA at +5V, swings within 4mV of rails at 100kΩ. |
| 4 | VDD | Positive supply - bypass with 0.1µF ceramic capacitor placed adjacent to pin for noise immunity. |
| 5 | VSS | Negative supply (ground) - low-impedance return path critical for input common-mode integrity and PSRR. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low 750nA supply current | Enables >10-year battery life in coin-cell-powered wireless sensor nodes operating at 1Hz sampling. |
| Ground-sensing input range | Accepts 0V input common-mode - essential for direct connection to pH electrodes and thermistors referenced to system ground. |
| Rail-to-rail output swing | Delivers full 1.8V output span at 100kΩ load - preserves ADC resolution in low-voltage microcontroller interfaces. |
| No phase reversal on overdrive | Prevents latch-up or erroneous output polarity during transient input excursions - improves reliability in unattended field sensors. |
| 40kHz gain-bandwidth at ≥+5V/V | Supports stable amplification of slow-varying bio/chemical signals without external compensation components. |
Applications
| pH Meter Front-End | Remote Environmental Sensor |
|---|---|
|
Use Scenario: Amplifying mV-level output from glass pH electrodes in handheld or field-deployed analyzers. IC Role / Device Role / Timing Role: Precision DC-coupled transimpedance and buffer amplifier with ground-referenced input and rail-to-rail output. Use Value: ±0.5mV offset and 750nA quiescent current enable sub-0.01pH resolution and multi-year battery operation. |
Use Scenario: Signal conditioning for low-power temperature/humidity sensors in battery-powered IoT nodes. IC Role / Device Role / Timing Role: Low-drift, high-input-impedance amplifier driving SAR ADC inputs in intermittent-sampling systems. Use Value: 120dB open-loop gain and 250pF capacitive load tolerance ensure stable acquisition across varied PCB layouts. |
| Solar-Powered Data Logger | Portable Electrometer |
|
Use Scenario: Amplifying weak current outputs from photodiode or gas sensor arrays powered by small solar cells. IC Role / Device Role / Timing Role: Micropower transimpedance amplifier with VSS-referenced input and minimal supply headroom requirement. Use Value: +1.8V minimum supply and 4mV rail margin allow operation directly from harvested energy without LDO overhead. |
Use Scenario: High-impedance current-to-voltage conversion for ion-selective electrodes or radiation detectors. IC Role / Device Role / Timing Role: Electrometer-grade op amp with <1.5nA input bias current and no phase reversal. Use Value: Sub-nA input bias and 95dB PSRR suppress leakage-induced errors in femtoampere-level measurements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar micropower, rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4470EXK+T | Unity-gain stable, 9kHz GBW, same SC70-5 package and pinout. | Better suited for gain-of-1 buffers or low-frequency integrators where stability at G = 1 is required. | Select MAX4470EXK+T when closed-loop gain is < +5V/V; MAX4464EXK+T is mandatory for ≥+5V/V with higher bandwidth. |
| TLV8511IDBVR | 700nA IDD, 10kHz GBW, rail-to-rail I/O, same SOT-23-5 footprint but different pin mapping (IN−/IN+/VDD/OUT/VSS). | Limited to ≤+3.6V supply; lacks guaranteed ground-sensing input (VCM starts at −0.1V). | Use TLV8511IDBVR only if supply ≤3.6V and input common-mode never reaches true ground; verify layout compatibility due to pinout mismatch. |
Compared with MAX4470EXK+T and TLV8511IDBVR, the MAX4464EXK+T uniquely combines 40kHz bandwidth, guaranteed ground-sensing input, and SC70-5 compatibility - making it the only choice for stable, high-precision amplification at +5V/V gain in space-constrained, battery-limited systems.
Availability
MAX4464EXK+T is available at Aetrix Electronics and suitable for pH meters, remote environmental sensors, solar-powered data loggers, and portable electrometers requiring stable component supply with long-term manufacturability and consistent parametric performance.
Supply support for MAX4464EXK+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, mixed-signal, and power-management ICs for demanding industrial, medical, and communications applications.
The MAX4464EXK+T belongs to the MAX4464/MAX4470 family of micropower rail-to-rail op amps engineered specifically for ultra-low-power, ground-sensing signal conditioning in battery- and energy-harvesting–powered instrumentation.
FAQ
What is the minimum stable gain configuration for the MAX4464EXK+T?
The MAX4464EXK+T is internally decompensated and stable only for closed-loop gains of +5V/V or greater. Attempting unity-gain or gain-of-2 configurations will cause instability and oscillation. This differs from the MAX4470EXK+T, which is unity-gain stable. Always verify gain-setting resistor ratios against the 5V/V minimum when designing with MAX4464EXK+T.
Does the MAX4464EXK+T support true ground-referenced input signals?
Yes, the MAX4464EXK+T guarantees an input common-mode voltage range from VSS (ground) to VDD − 1.1V, enabling direct interface with grounded sensors like pH electrodes and thermistors. Its input stage avoids phase reversal even when inputs exceed the common-mode range - a critical feature for robustness in unpredictable field environments.
What is the maximum capacitive load the MAX4464EXK+T can drive without compensation?
The MAX4464EXK+T is characterized to remain stable with up to 250pF of capacitive load at its output, per the datasheet's "Capacitive Load" specification. For loads exceeding 250pF - such as long traces or ADC input capacitance - a small feedback capacitor (2–10pF) across the gain-setting resistor is recommended, as shown in Figure 1 of the MAX4464 datasheet.
Can the MAX4464EXK+T operate from a single 1.8V supply?
Yes, the MAX4464EXK+T is fully specified from +1.8V to +5.5V. At 1.8V, it maintains 750nA typical supply current, rail-to-rail output swing within 15mV of each rail (at 100kΩ), and functional operation across −40°C to +85°C. This makes it ideal for direct connection to single-cell lithium or alkaline batteries without voltage regulation.
Is the MAX4464EXK+T pin-compatible with other devices in the MAX4470 family?
The MAX4464EXK+T shares the same 5-pin SC70 package and identical pinout (IN+, IN−, OUT, VDD, VSS) with MAX4470EXK+T and MAX4470EUK+T. However, it is not functionally interchangeable due to differing gain stability requirements: MAX4464EXK+T requires ≥+5V/V gain, while MAX4470EXK+T is unity-gain stable. Swapping them without circuit review risks instability.
MAX4464EXK+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- 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:
- SC-70-5
MAX4464EXK+T FAQ
1.How can I place an order for MAX4464EXK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4464EXK+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 MAX4464EXK+T reliable?
The price and inventory of MAX4464EXK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4464EXK+T is usually 5 days.
3.What payment methods are accepted for MAX4464EXK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4464EXK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4464EXK+T?
MAX4464EXK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4464EXK+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 MAX4464EXK+T?
For technical support, including MAX4464EXK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4464EXK+T requirements.
6.How does Aetrix verify that MAX4464EXK+T is sourced from the original manufacturer or authorized distributors?
All MAX4464EXK+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 MAX4464EXK+T meets industry standards.
7.What is the process for return or replacement of MAX4464EXK+T?
All MAX4464EXK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4464EXK+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 MAX4464EXK+T part is unused and in its original packaging.
Return procedure for MAX4464EXK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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