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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:2,314
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Product details
Overview
The MAX4255EUK-T from Analog Devices is a single, low-noise, low-distortion, rail-to-rail output operational amplifier optimized for 10V/V or greater gain configurations. It delivers 22MHz gain-bandwidth product, 2.1V/µs slew rate, 0.0012% THD+N at 1kHz (1kΩ load), 7.9nV/√Hz input voltage-noise density at 30kHz, and draws only 400µA quiescent supply current per amplifier - making it ideal for precision signal conditioning in portable battery-powered 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), 5-pin SOT23 package footprint, ground-sensing input range, rail-to-rail output swing within 8mV of rails (10kΩ load), and suitability for ADC buffering, medical sensor front-ends, and low-voltage wireless PA control loops.
Technical Context
The MAX4255EUK-T is internally compensated for closed-loop gains of 10V/V or higher, enabling high-speed performance with 22MHz GBW and 2.1V/µs slew rate - distinct from the unity-gain stable MAX4250–MAX4254 variants. Its input stage features ultra-low input bias current (1pA typ) and input offset voltage (±70µV max), supporting high-impedance source interfacing without significant error.
It operates from a single 2.4V to 5.5V supply, with input common-mode range extending to VSS (ground) and output swing rail-to-rail under 10kΩ load. The device handles up to 400pF capacitive loads without oscillation and maintains phase margin ≥68° at AV = 10V/V.
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 bandwidth up to ~2MHz. |
| Slew Rate | 2.1V/µs - supports fast settling of large-signal transients in ADC driver and sensor signal chain applications. |
| THD+N (1kHz, 2VP-P, RL=1kΩ) | 0.0012% - ensures minimal harmonic corruption in audio and precision measurement paths. |
| Input Voltage-Noise Density | 7.9nV/√Hz at 30kHz - preserves SNR in wideband sensor amplification and preamp stages. |
| Quiescent Supply Current | 400µA per amplifier - enables multi-channel low-power designs in battery-operated equipment. |
| Input Offset Voltage | ±70µV max - reduces DC error in precision gain stages and bridge sensor interfaces. |
| Rail-to-Rail Output Swing | Within 8mV of VDD/VSS (10kΩ load) - maximizes dynamic range in low-voltage (2.4V–5.5V) systems. |
Pinout & Package
The MAX4255EUK-T is housed in a 5-pin SOT23 package (JEDEC MO-178AA), with pin 1 marked by a dot or beveled edge. Pin assignments are fully compatible across the MAX4250/MAX4255 family in this package variant.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Amplifier output - rail-to-rail capable, drives 1kΩ loads while maintaining DC accuracy; high-impedance in shutdown mode (not applicable to MAX4255). |
| 2 | VSS | Negative supply - connect directly to ground for single-supply operation; defines lower common-mode limit. |
| 3 | IN+ | Noninverting input - high-impedance (1000GΩ), supports ground-referenced sensors and low-leakage sources. |
| 4 | IN− | Inverting input - matched to IN+; requires external feedback network for closed-loop configuration. |
| 5 | VDD | Positive supply - accepts 2.4V to 5.5V; bypass with 0.1µF ceramic capacitor placed near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Decompensated stability | Guaranteed stable at AV ≥ 10V/V - enables higher bandwidth than unity-gain stable op-amps without external compensation. |
| Ultra-low input current noise | 0.5fA/√Hz - critical for preserving signal integrity when amplifying high-impedance piezoelectric or photodiode sources. |
| Rail-to-rail output with 10kΩ load | Swings to within 8mV of VDD/VSS - maximizes usable output voltage range in 3.3V or lower supply systems. |
| Low THD+N at audio frequencies | 0.0012% at 1kHz - meets requirements for 16-bit ADC driver applications where distortion limits effective resolution. |
| Single-supply operation down to 2.4V | Enables direct interface with Li-ion battery (2.7–4.2V) or regulated 2.5V/3.3V rails without level-shifting circuitry. |
Applications
| Portable Medical Sensors | 16-Bit ADC Buffering |
|---|---|
Use Scenario: Amplifying low-level signals from ECG electrodes or strain gauges in handheld diagnostic devices. IC Role / Device Role: Precision noninverting amplifier with gain ≥10V/V, driving ADC reference and input pins. Use Value: 7.9nV/√Hz input noise and ±70µV VOS preserve microvolt-level biopotential fidelity; rail-to-rail output matches 3.3V ADC input range. | Use Scenario: Driving the analog input of a 16-bit SAR ADC (e.g., MAX195) in data acquisition modules. IC Role / Device Role: Low-distortion, low-noise buffer with 22MHz GBW to settle step inputs within 1.6µs (0.01%). Use Value: 0.0012% THD+N prevents harmonic folding into Nyquist band; 400µA IQ minimizes system power budget impact. |
| Wireless Transceiver PA Control | Digital Scale Signal Conditioning |
Use Scenario: Closed-loop feedback amplifier in RF power amplifier bias control circuits for Bluetooth/Wi-Fi modules. IC Role / Device Role: High-accuracy current-sense amplifier with ground-sensing input and rail-to-rail output. Use Value: Input CMVR includes ground allows direct sensing of low-side current shunts; 2.1V/µs slew rate supports fast PA enable/disable response. | Use Scenario: Amplifying mV-level outputs from load cells or Wheatstone bridges in industrial weighing terminals. IC Role / Device Role: Low-drift, low-noise instrumentation amplifier front-end (used in 3-op-amp configuration or as gain stage). Use Value: 0.3µV/°C VOS tempco and 1pA IB minimize drift-induced errors over temperature; 22MHz GBW supports fast scale stabilization. |
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 and pinout. | Preferred for AV = 1–5V/V, low-frequency precision (<100kHz) applications like sensor biasing or I/V conversion. | Select MAX4250EUK+T when unity-gain stability or lower bandwidth suffices; avoid for AV ≥ 10V/V or >500kHz closed-loop use. |
| OPA376AIDBVR | 10MHz GBW, 2.5V/µs slew rate, 7.5nV/√Hz noise, 0.0007% THD+N, 5-pin SOT23, but no guaranteed rail-to-rail output swing specification. | Better THD+N and slightly lower noise, but output swing limited to 100mV from rails (typ) - unsuitable for full-scale 3.3V ADC drive. | Choose OPA376AIDBVR only if rail-to-rail output is not required and THD+N <0.0007% is critical; verify output swing under actual load conditions. |
Compared with MAX4250EUK+T, the MAX4255EUK-T trades unity-gain stability for 7.3× higher bandwidth and 7× faster slew rate - essential for high-gain, high-speed signal chains. Against OPA376AIDBVR, it guarantees rail-to-rail output swing within 8mV of supplies, enabling full utilization of low-voltage ADC input ranges without headroom loss.
Availability
MAX4255EUK-T is available at Aetrix Electronics and suitable for portable medical sensors, 16-bit ADC buffering, wireless transceiver PA control, and digital scale signal conditioning requiring stable component supply and long-term production continuity.
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, automotive, and communications markets.
The MAX4249–MAX4257 family was designed specifically for low-noise, low-distortion, single-supply signal conditioning in battery-powered and space-constrained applications - emphasizing rail-to-rail operation, micropower efficiency, and robust AC/DC performance.
FAQ
What is the minimum stable gain for the MAX4255EUK-T?
The MAX4255EUK-T is internally compensated for stable operation at closed-loop gains of 10V/V or greater. It is not unity-gain stable; using it at AV < 10V/V may cause peaking or oscillation. For AV = 1–9V/V, consider the MAX4250EUK+T instead. This gain constraint is explicitly defined in the datasheet's Electrical Characteristics and Selector Guide tables.
Does the MAX4255EUK-T have a shutdown pin?
No, the MAX4255EUK-T does not include a shutdown (SHDN) pin. Shutdown functionality is only available on the MAX4249, MAX4251, MAX4253, and MAX4256 variants - all of which have different pin counts and package types. The MAX4255EUK-T is a 5-pin SOT23 device with fixed pinout (OUT, VSS, IN+, IN−, VDD) and no SHDN terminal.
What is the maximum capacitive load the MAX4255EUK-T can drive without external isolation?
The MAX4255EUK-T is specified to remain stable with capacitive loads up to 400pF without requiring an external isolation resistor. This is confirmed in the Electrical Characteristics table under "Capacitive-Load Stability" and supported by Typical Operating Characteristic Figure 12. Loads exceeding 400pF require series RISO per Figure 5 and Table 6 in the datasheet.
Is the MAX4255EUK-T rated for automotive temperature range?
No, the MAX4255EUK-T is rated for the commercial temperature range of −40°C to +85°C. The automotive-grade variant is the MAX4250AAUK+T, which operates from −40°C to +125°C and uses the same 5-pin SOT23 package but with different internal trimming and qualification. The MAX4255EUK-T is not qualified to AEC-Q100 or automotive reliability standards.
Can the MAX4255EUK-T drive a 1kΩ load while maintaining DC accuracy?
Yes, the MAX4255EUK-T is characterized to drive 1kΩ loads while maintaining DC accuracy - including specified output voltage swing (VOL/VOL − VSS ≤ 20mV, VOH − VDD ≤ 77mV at RL = 1kΩ), large-signal voltage gain (≥80dB), and THD+N performance. This capability is explicitly verified in the Electrical Characteristics table and Typical Operating Characteristics Figures 4 and 7.
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:
- Obsolete
- 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:
- 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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