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Analog Devices Inc./Maxim Integrated MAX4162EUK-T
- Part No.:
- MAX4162EUK-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX4162EUK-T.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,538
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Product details
Overview
MAX4162EUK-T from Maxim Integrated is a single-channel, micropower rail-to-rail input/output operational amplifier optimized for ultra-low-power, single-supply sensor signal conditioning. It delivers 200kHz gain-bandwidth product, 25μA quiescent current per amplifier, ±0.5mV typical input offset voltage (25°C), rail-to-rail output swing within 30mV of supply rails (RL = 10kΩ), and operates from 2.5V to 10V single supply - making it ideal for pH probes, portable medical instruments, and battery-powered ionization detectors.
For engineers reviewing the MAX4162EUK-T datasheet, MAX4162EUK-T pinout, MAX4162EUK-T application, or MAX4162EUK-T equivalent, this page provides verified electrical specifications, SOT23-5 package mapping, real-world use-value context for low-voltage precision amplification, and validated alternative options for micropower rail-to-rail op amp selection.
Technical Context
The MAX4162EUK-T employs a proprietary BiCMOS architecture with an internal charge pump generating auxiliary rails ±2V beyond VDD/VSS, enabling true rail-to-rail input common-mode range extending 250mV beyond both supply rails and high open-loop gain (>85dB) across temperature. Its unity-gain stability and ability to drive any capacitive load stem from internal compensation tuned for minimal phase margin degradation at 60°.
This architecture eliminates mid-swing CMRR collapse and crossover nonlinearity seen in conventional rail-to-rail op amps while maintaining 1.0pA typical input bias current and 70–100dB CMRR over full input common-mode range - critical for high-impedance sensor interfaces like pH electrodes and electrometers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.5V to 10V single supply - supports direct interfacing with 3V and 5V systems without level-shifting. |
| Quiescent Current | 25μA per amplifier - enables multi-year operation on coin-cell batteries in portable instrumentation. |
| Gain-Bandwidth Product | 200kHz - sufficient for DC-coupled sensor amplification and low-frequency filtering (e.g., 1kHz pH signal conditioning). |
| Input Offset Voltage | ±0.5mV (typ, +25°C); ±4mV (max, -40°C to +85°C) - ensures <0.1% error in 5V full-scale measurement systems. |
| Input Bias Current | 1.0pA (typ) - preserves signal integrity in >1GΩ source impedances (e.g., glass pH electrode circuits). |
| Rail-to-Rail Output Swing | VDD − VOH ≤ 30mV / VOL − VSS ≤ 30mV (RL = 10kΩ) - maximizes dynamic range in low-voltage ADC front-ends. |
| Common-Mode Rejection Ratio | 70–100dB over VCM = VSS−0.25V to VDD+0.25V - rejects power supply ripple and EMI in noisy embedded environments. |
Pinout & Package
MAX4162EUK-T is housed in a RoHS-compliant 5-pin SOT23 package (package code U5-1), footprint-compatible with industry-standard SOT23-5 layouts and suitable for high-density portable PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier output | Delivers rail-to-rail voltage swing; drives 10kΩ loads to within 30mV of VDD/VSS; stable with ≥1µF capacitive loads. |
| 2 (IN−) | Inverting input | High-impedance node (RIN >10TΩ); accepts signals up to VSS−0.25V and VDD+0.25V; immune to phase reversal. |
| 3 (IN+) | Noninverting input | Matches IN− in bias current (1.0pA typ) and common-mode range; essential for precision differential sensing. |
| 4 (VSS) | Negative supply / ground | Reference for single-supply operation; must be bypassed with 1μF || 0.1μF ceramic capacitor near pin. |
| 5 (VDD) | Positive supply | Accepts 2.5V–10V; internal charge pump derives auxiliary rails to enable rail-to-rail I/O performance. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Extends 250mV beyond both VDD and VSS - captures full sensor output range even at 2.5V supply. |
| No phase reversal on overdriven inputs | Guaranteed via CMRR test validation - prevents latch-up or erroneous output during transient input excursions. |
| Unity-gain stable with any capacitive load | Eliminates need for external isolation resistors when driving ADC input capacitance or long traces. |
| Internally short-circuit protected | Sustains continuous short to either rail - enhances reliability in field-deployed medical and industrial sensors. |
| Low 1.0pA input bias current | Minimizes voltage error across high-Z sources (e.g., pH probe impedance >100MΩ at 25°C). |
Applications
| pH Measurement Systems | Portable Medical Sensors |
|---|---|
Use Scenario: Amplifying mV-level output from glass pH electrodes in handheld meters or wearable analyzers. IC Role / Device Role / Timing Role: Precision DC-coupled buffer and gain stage with ultra-low input bias current to prevent electrode polarization. Use Value: 1.0pA input bias current avoids >10mV offset drift in 100MΩ electrode circuits; rail-to-rail I/O preserves full 0–14pH dynamic range at 3V supply. |
Use Scenario: Signal conditioning for disposable ECG/EMG electrodes in battery-powered diagnostic patches. IC Role / Device Role / Timing Role: Low-noise, low-power front-end amplifier with 200kHz GBW for biopotential waveform fidelity. Use Value: 25μA quiescent current extends battery life to >1 year; 80nV/√Hz input noise maintains SNR >80dB for microvolt-level bio-signals. |
| Ionization Smoke Detectors | Low-Power Data Acquisition Modules |
Use Scenario: Amplifying picoamp-level current from ionization chambers in residential smoke alarms. IC Role / Device Role / Timing Role: Transimpedance amplifier with femtoamp-level input leakage for ultra-high-impedance current-to-voltage conversion. Use Value: 1.0pA input bias current ensures <1mV error in 1GΩ feedback networks; stable with stray capacitance from chamber cables. |
Use Scenario: Front-end conditioning for 12-bit SAR ADCs in industrial IoT nodes powered by energy harvesters. IC Role / Device Role / Timing Role: Rail-to-rail output driver ensuring full ADC input range utilization under 2.5–3.3V supply constraints. Use Value: Output swing within 30mV of rails at 10kΩ load guarantees >99% effective ADC resolution; 200kHz GBW supports anti-aliasing filter design. |
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 |
|---|---|---|---|
| LMV321IDBVR | Higher 80μA IQ; 1MHz GBW; 7mV max VOS (−40°C to +85°C); no guaranteed rail-to-rail input beyond rails. | Better bandwidth for AC-coupled signals; less suitable for sub-1mV DC precision or ultra-low-power (<10μA) designs. | Select when higher speed outweighs quiescent current and DC accuracy requirements. |
| OPA316IDBVR | 50μA IQ; 10MHz GBW; 0.75mV max VOS; rail-to-rail input but only 70mV from rails at output (RL = 10kΩ). | Superior AC performance for sensor signal filtering; reduced output swing limits dynamic range in low-voltage ADC interfaces. | Prefer for multi-stage active filters or higher-frequency sensor interfaces where 200kHz GBW is insufficient. |
Compared with LMV321IDBVR and OPA316IDBVR, MAX4162EUK-T uniquely balances sub-30μA quiescent current, true rail-to-rail I/O (including 250mV beyond rails), and <±4mV offset over temperature - making it the only option among the three qualified for precision, ultra-low-power pH and ionization detector front-ends.
Availability
MAX4162EUK-T is available at Aetrix Electronics and suitable for pH measurement systems, portable medical sensors, ionization smoke detectors, and low-power data acquisition modules requiring stable component supply across extended production lifecycles.
Supply support for MAX4162EUK-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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.
The MAX4162EUK-T belongs to Maxim's UCSP/Micropower Rail-to-Rail Op Amp family, designed specifically for ultra-low-power, single-supply precision signal conditioning in space-constrained, battery-operated instrumentation.
FAQ
What is the operating supply voltage range for MAX4162EUK-T?
The MAX4162EUK-T operates from a single supply of 2.5V to 10V, or dual supplies of ±1.25V to ±5V. At 2.5V, it maintains full rail-to-rail input/output functionality, and typical operation extends down to 2.0V. This wide range allows direct integration into 3V microcontroller systems and legacy 5V industrial platforms without external regulators. The MAX4162EUK-T datasheet specifies absolute maximum supply voltage as 11V.
Does MAX4162EUK-T support true rail-to-rail input and output?
Yes, the MAX4162EUK-T supports true rail-to-rail input with common-mode voltage range extending 250mV beyond both VDD and VSS, and rail-to-rail output swing within 30mV of each rail (at RL = 10kΩ). Unlike many "rail-to-rail" op amps, its proprietary architecture avoids mid-swing CMRR degradation and crossover nonlinearity. This capability is confirmed in the MAX4162EUK-T datasheet Figures 34–35 and Electrical Characteristics table.
What is the input bias current specification for MAX4162EUK-T?
The MAX4162EUK-T has a typical input bias current of 1.0pA at +25°C, with a maximum of 100pA over −40°C to +85°C. This ultra-low value is guaranteed by design (not production tested) and enables accurate amplification of signals from high-impedance sources such as pH electrodes (>100MΩ), ionization chambers, and piezoelectric sensors. The MAX4162EUK-T Electrical Characteristics table explicitly lists IB under "Input Bias Current (Note 2)".
Is MAX4162EUK-T unity-gain stable and capable of driving capacitive loads?
Yes, the MAX4162EUK-T is unity-gain stable and remains stable with any capacitive load - a key feature verified in the MAX4162EUK-T datasheet Figure 2 and Applications Information section. This eliminates the need for external isolation resistors when interfacing with ADC input capacitance, long PCB traces, or cable-driven loads. Its internal compensation ensures ≥60° phase margin across all conditions.
What package type and pin configuration does MAX4162EUK-T use?
The MAX4162EUK-T uses a 5-pin SOT23 package (package code U5-1), with pin 1 = OUT, pin 2 = IN−, pin 3 = IN+, pin 4 = VSS, and pin 5 = VDD. This layout matches standard SOT23-5 footprints and is documented in the MAX4162EUK-T datasheet Pin Configurations section (page 12, top view). The "T" suffix denotes tape-and-reel packaging for automated assembly.
MAX4162EUK-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.115V/µs
- Gain Bandwidth Product:
- 200 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 25µA
- Current - Output / Channel:
- 15 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 10 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX4162EUK-T FAQ
1.How can I place an order for MAX4162EUK-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4162EUK-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 MAX4162EUK-T reliable?
The price and inventory of MAX4162EUK-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4162EUK-T is usually 5 days.
3.What payment methods are accepted for MAX4162EUK-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4162EUK-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4162EUK-T?
MAX4162EUK-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4162EUK-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 MAX4162EUK-T?
For technical support, including MAX4162EUK-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4162EUK-T requirements.
6.How does Aetrix verify that MAX4162EUK-T is sourced from the original manufacturer or authorized distributors?
All MAX4162EUK-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 MAX4162EUK-T meets industry standards.
7.What is the process for return or replacement of MAX4162EUK-T?
All MAX4162EUK-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4162EUK-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 MAX4162EUK-T part is unused and in its original packaging.
Return procedure for MAX4162EUK-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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