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Analog Devices Inc./Maxim Integrated MAX4255EUK+T
- Part No.:
- MAX4255EUK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX4255EUK+T.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,384
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Product details
Overview
MAX4255EUK+T from Analog Devices is a single-channel, rail-to-rail output, low-noise, low-distortion operational amplifier in a 5-pin SOT23 package. It operates from 2.4V to 5.5V single supply, draws 400µA quiescent current per amplifier, delivers 22MHz gain-bandwidth product at ≥10V/V gain, and achieves 0.0012% THD+N at 1kHz with 2VP-P output into 1kΩ - making it ideal for precision ADC buffering in portable instrumentation.
For engineers reviewing the MAX4255EUK+T datasheet, MAX4255EUK+T pinout, MAX4255EUK+T application, or MAX4255EUK+T equivalent, key selection criteria include its decompensated stability (AV ≥ 10V/V), 7.9nV/√Hz input voltage-noise density at 30kHz, 8mV rail-to-rail output swing with 10kΩ load, shutdown capability (0.5µA), and compatibility with high-impedance sensor interfaces requiring ultra-low distortion.
Technical Context
The MAX4255EUK+T is a decompensated op amp optimized for closed-loop gains of 10V/V or higher, delivering 22MHz GBW and 2.1V/µs slew rate - significantly exceeding unity-gain-stable variants like MAX4250. Its input stage features FET-based topology with 1pA bias current and 70µV max input offset voltage, enabling accurate signal conditioning of piezoelectric transducers and strain gauges.
It supports true rail-to-rail output swing (within 8mV of rails at 10kΩ), accepts input common-mode voltage down to ground, and maintains stability driving capacitive loads up to 400pF without external compensation. Unlike MAX4251/MAX4256, it lacks shutdown functionality - confirmed by Pin Description table showing no SHDN pin on 5-pin SOT23 configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 22MHz - enables stable operation at AV ≥ 10V/V with sufficient loop gain for precision closed-loop designs |
| Input Voltage-Noise Density | 7.9nV/√Hz @ 30kHz - ensures minimal added noise in wideband sensor signal chains |
| THD+N | 0.0012% @ 1kHz, 2VP-P, 1kΩ - meets requirements for 16-bit ADC front-end accuracy |
| Quiescent Supply Current | 400µA per amplifier - supports battery-powered equipment with multi-day runtime |
| Rail-to-Rail Output Swing | Within 8mV of VDD/VSS @ 10kΩ - maximizes dynamic range in low-voltage (2.4V–5.5V) systems |
| Input Offset Voltage | ±0.07mV (max) - reduces DC error in precision gain stages and differential amplifiers |
| Capacitive-Load Drive | Stable up to 400pF - eliminates need for isolation resistors in typical PCB trace and filter capacitor scenarios |
Pinout & Package
MAX4255EUK+T is housed in a 5-pin SOT23 package (package code U5+2), footprint-compatible with industry-standard SC-70-5 layouts. The device has no shutdown pin and no NC terminal - all five pins are functional.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Amplifier output - drives loads down to 1kΩ while maintaining DC accuracy and rail-to-rail swing |
| 2 | VSS | Negative supply - connect to ground for single-supply operation; defines lower common-mode limit |
| 3 | IN+ | Noninverting input - high-impedance (1000GΩ) node for sensor or reference signal connection |
| 4 | IN− | Inverting input - accepts feedback network; input capacitance is 11pF, requiring feed-forward compensation above 5kΩ impedance |
| 5 | VDD | Positive supply - operates from 2.4V to 5.5V; requires local 0.1µF ceramic bypass capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Decompensated architecture | Stable only at AV ≥ 10V/V - trades unity-gain flexibility for 22MHz GBW and 2.1V/µs slew rate |
| Ultra-low input voltage noise | 7.9nV/√Hz at 30kHz - preserves SNR in microphone preamps and medical ECG front-ends |
| Ground-sensing input | Input common-mode range includes VSS - enables direct interfacing with unipolar sensors referenced to ground |
| Rail-to-rail output stage | Swings within 8mV of supplies with 10kΩ load - delivers full-scale output in 3V and lower systems |
| Low THD+N | 0.0012% @ 1kHz - satisfies audio-grade and precision measurement linearity requirements |
Applications
| ADC Buffering | Portable Medical Instrumentation |
|---|---|
Use Scenario: Driving the input of a 16-bit SAR ADC (e.g., MAX195) in a handheld blood glucose meter. IC Role / Device Role / Timing Role: Precision voltage follower/buffer isolating high-impedance sensor circuitry from ADC sampling kickback. Use Value: 70µV max VOS and 0.0012% THD+N prevent code-dependent errors and preserve ENOB >15.5 bits. | Use Scenario: Signal conditioning for piezoelectric pressure sensors in wearable respiratory monitors. IC Role / Device Role / Timing Role: Low-noise, high-input-impedance amplifier capturing microvolt-level transducer outputs. Use Value: 1pA IBIAS and 7.9nV/√Hz noise floor maintain signal integrity without loading high-Z sources. |
| Digital Scale Strain Gauge Interface | Wireless Communication PA Control |
Use Scenario: Amplifying mV-level bridge outputs in battery-powered digital kitchen scales. IC Role / Device Role / Timing Role: Instrumentation-grade gain stage with fixed AV = 100V/V using precision resistors. Use Value: 22MHz GBW ensures flat frequency response across 0–100Hz weighing bandwidth; 400µA IQ extends battery life. | Use Scenario: Closed-loop RF power amplifier output monitoring in Bluetooth LE transceivers. IC Role / Device Role / Timing Role: High-speed comparator alternative for envelope detection and AGC feedback path. Use Value: 2.1V/µs slew rate and rail-to-rail swing enable accurate 2.4GHz PA output envelope capture at baseband. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4250EUK+T | Unity-gain stable, 3MHz GBW, 0.3V/µs slew rate, same 5-pin SOT23 package | Suitable for AV = 1–5V/V configurations where bandwidth <1MHz suffices | Select when gain stability at unity or low AV is required; not drop-in for MAX4255EUK+T's 10V/V+ designs |
| OPA333AIDBVR | Zero-drift architecture, 0.1µV/°C drift, 17µV max VOS, 350kHz GBW, 0.16V/µs slew rate | Better DC precision but insufficient bandwidth/slew for audio or fast ADC buffering | Prefer for ultra-low drift DC-coupled sensor interfaces; avoid where >1MHz signal fidelity is needed |
Compared with MAX4250EUK+T and OPA333AIDBVR, the MAX4255EUK+T uniquely balances high-speed decompensated performance (22MHz, 2.1V/µs) with low-noise (7.9nV/√Hz) and rail-to-rail operation in a space-constrained SOT23 - making it optimal for gain ≥10V/V, battery-powered, wide-dynamic-range signal chains.
Availability
MAX4255EUK+T is available at Aetrix Electronics and suitable for portable medical instrumentation, precision ADC buffering, digital scale strain gauge interfaces, and wireless communication PA control requiring stable component supply across industrial and consumer production programs.
Supply support for MAX4255EUK+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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, and communications markets.
The MAX4249–MAX4257 family was designed specifically for low-noise, low-distortion, rail-to-rail signal conditioning in battery-powered and space-constrained systems - emphasizing ultra-low IQ, ground-sensing inputs, and robust capacitive-load drive.
FAQ
What is the minimum stable gain for MAX4255EUK+T?
The MAX4255EUK+T is internally compensated for gains of 10V/V or greater. It is not unity-gain stable - attempting AV < 10V/V risks instability and peaking. This decompensated design enables its 22MHz gain-bandwidth product and 2.1V/µs slew rate. Always verify phase margin in simulation when operating near the 10V/V threshold.
Does MAX4255EUK+T include a shutdown pin?
No, the MAX4255EUK+T does not have a shutdown function. Its 5-pin SOT23 pinout (OUT, VSS, IN+, IN−, VDD) contains no SHDN terminal - unlike MAX4251/MAX4256 which feature shutdown in 8-pin packages. Power-down must be implemented externally via VDD switching or series FET control.
What is the maximum capacitive load MAX4255EUK+T can drive without oscillation?
The MAX4255EUK+T remains stable driving capacitive loads up to 400pF with no external compensation. This includes typical PCB trace capacitance, decoupling caps, and RC filter networks. For loads >400pF, an isolation resistor (e.g., 150Ω for 1000pF) between OUT and CL is required to restore phase margin.
Can MAX4255EUK+T operate from a 2.4V supply?
Yes, the MAX4255EUK+T is fully specified for single-supply operation from 2.4V to 5.5V. At 2.4V, it maintains rail-to-rail output swing (within ~12mV of rails), 400µA quiescent current, and usable bandwidth - enabling use in coin-cell or Li-ion single-cell systems where headroom is constrained.
What is the input common-mode voltage range of MAX4255EUK+T?
The input common-mode voltage range of MAX4255EUK+T extends from VSS (ground) to VDD − 1.1V. This ground-sensing capability allows direct interface with sensors and signal sources referenced to system ground - a critical feature for single-supply precision applications where negative rail is unavailable.
MAX4255EUK+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:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Push-Pull, Rail-to-Rail
- Slew Rate:
- 2.1V/µs
- Gain Bandwidth Product:
- 22 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.1 pA
- Voltage - Input Offset:
- 70 µV
- Current - Supply:
- 420µA
- Current - Output / Channel:
- 68 mA
- Voltage - Supply Span (Min):
- 2.4 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
MAX4255EUK+T FAQ
1.How can I place an order for MAX4255EUK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4255EUK+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 MAX4255EUK+T reliable?
The price and inventory of MAX4255EUK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4255EUK+T is usually 5 days.
3.What payment methods are accepted for MAX4255EUK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4255EUK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4255EUK+T?
MAX4255EUK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4255EUK+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 MAX4255EUK+T?
For technical support, including MAX4255EUK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4255EUK+T requirements.
6.How does Aetrix verify that MAX4255EUK+T is sourced from the original manufacturer or authorized distributors?
All MAX4255EUK+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 MAX4255EUK+T meets industry standards.
7.What is the process for return or replacement of MAX4255EUK+T?
All MAX4255EUK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4255EUK+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 MAX4255EUK+T part is unused and in its original packaging.
Return procedure for MAX4255EUK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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