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Analog Devices Inc./Maxim Integrated MAX4250EUK+T
- Part No.:
- MAX4250EUK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX4250EUK+T.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:6,608
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Product details
Overview
The MAX4250EUK+T from Analog Devices is a single, unity-gain stable, rail-to-rail output operational amplifier optimized for low-noise (7.9nV/√Hz at 30kHz), low-distortion (0.0004% THD+N at 1kHz), and ultra-low quiescent current (400µA) operation from 2.4V to 5.5V supplies. It features input common-mode range extending to ground, 8mV rail-to-rail output swing with 10kΩ load, and 3MHz gain-bandwidth product - making it ideal for battery-powered instrumentation and precision ADC buffering.
For engineers reviewing the MAX4250EUK+T datasheet, MAX4250EUK+T pinout, MAX4250EUK+T application, or MAX4250EUK+T equivalent, this page delivers verified electrical specifications, SOT23-5 package layout, real-world use cases in medical sensors and portable audio, and validated alternative op amps with documented performance trade-offs.
Technical Context
The MAX4250EUK+T employs a CMOS input stage with 1pA bias current and 70µV max input offset voltage, enabling high-impedance source interfacing without significant error. Its rail-to-rail output uses a push-pull stage capable of ±5mA drive while maintaining DC accuracy into 1kΩ loads.
It is unity-gain stable with 74° phase margin and 10dB gain margin at AV = 1, supports capacitive loads up to 400pF without external compensation, and operates across –40°C to +85°C - confirmed by 100% production testing at +25°C and design-guaranteed limits over temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 3MHz - enables stable unity-gain configurations for sensor signal conditioning and ADC driver applications without oscillation. |
| Input Voltage-Noise Density | 7.9nV/√Hz at 30kHz - ensures minimal added noise in precision analog front-ends for 16-bit ADCs. |
| Total Harmonic Distortion + Noise | 0.0004% at 1kHz, 2VP-P, 1kΩ load - preserves signal fidelity in audio and communications paths. |
| Quiescent Supply Current | 400µA per amplifier - extends battery life in portable equipment requiring continuous low-power amplification. |
| Output Voltage Swing | Within 8mV of rails with 10kΩ load - maximizes dynamic range in 3V or 5V single-supply systems. |
| Input Common-Mode Range | Extends to VSS − 0.2V - allows direct interfacing with ground-referenced transducers and sensors. |
| Large-Signal Voltage Gain | 116dB - provides high loop gain for accurate closed-loop gain setting and low output error. |
Pinout & Package
The MAX4250EUK+T is housed in a 5-pin SOT23 package (package code U5+2, outline 21-0057), with exposed pad not electrically connected. Pin 1 is OUT, Pin 2 is IN−, Pin 3 is IN+, Pin 4 is VSS, and Pin 5 is VDD.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier output | Rail-to-rail push-pull output capable of ±5mA drive; swings within 8mV of VDD/VSS into 10kΩ. |
| 2 (IN−) | Inverting input | High-impedance CMOS node (11pF input capacitance); requires feed-forward capacitor if RF||RG > 20kΩ. |
| 3 (IN+) | Noninverting input | Ground-sensing input with common-mode range down to VSS − 0.2V; no phase reversal on overdrive. |
| 4 (VSS) | Negative supply / ground | Reference node for single-supply operation; must be bypassed with 0.1µF ceramic capacitor near pin. |
| 5 (VDD) | Positive supply | Accepts 2.4V–5.5V; quiescent current scales linearly (420µA at 5V, 400µA at 3V). |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Delivers full dynamic range in low-voltage systems: 8mV headroom at 10kΩ load ensures >99% utilization of 3V or 5V supply rails. |
| Ultra-low input current noise | 0.5fA/√Hz enables stable amplification of high-impedance sources (e.g., piezoelectric sensors, strain gauges) without added current-induced error. |
| 400pF capacitive-load stability | Drives ADC input capacitors, long traces, or filtering networks directly - eliminates need for isolation resistors in most PCB layouts. |
| Low THD+N at low supply voltage | 0.0004% THD+N at 1kHz with 2.4V supply confirms distortion performance is maintained across full operating voltage range. |
| Guaranteed operation at –40°C to +85°C | All electrical specs are 100% tested at +25°C and design-guaranteed over industrial temperature range - no derating required for embedded deployment. |
Applications
| Medical Instrumentation | ADC Buffers |
|---|---|
Use Scenario: Amplifying microvolt-level ECG or EEG signals in handheld patient monitors. IC Role / Device Role / Timing Role: Precision DC-coupled preamplifier with ground-sensing inputs and rail-to-rail output driving SAR ADC reference buffer. Use Value: 70µV max VOS and 7.9nV/√Hz noise preserve small-signal integrity; 400µA IQ extends battery runtime between charges. | Use Scenario: Driving the input of a 16-bit MAX195 ADC in portable data acquisition systems. IC Role / Device Role / Timing Role: Unity-gain stable buffer isolating ADC sample-and-hold capacitance from upstream signal chain. Use Value: 400pF capacitive-load capability eliminates external isolation resistor; 3MHz GBW ensures <1 LSB settling for 100ksps sampling. |
| Digital Scales/Strain Gauges | Portable/Battery-Powered Equipment |
Use Scenario: Conditioning mV-level bridge outputs in handheld weighing devices. IC Role / Device Role / Timing Role: Low-drift, low-noise instrumentation amplifier front-end (configured as noninverting gain stage). Use Value: 0.3µV/°C VOS tempco minimizes zero-point drift across ambient temperature changes; 1pA IB avoids loading high-Z Wheatstone bridges. | Use Scenario: Audio line driver in Bluetooth-enabled hearing aids and wearable health trackers. IC Role / Device Role / Timing Role: Single-supply headphone driver with rail-to-rail output and low THD+N for clean playback. Use Value: 0.0004% THD+N at 1kHz ensures audible distortion remains below perceptual threshold; 400µA IQ supports multi-day operation on coin-cell batteries. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise, low-power op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA333AIDBVR | Zero-drift architecture (0.02µV/°C VOS drift), lower VOS (10µV max), but higher noise (17nV/√Hz) and 65µA higher IQ (465µA). | Better DC precision in temperature-varying environments; less suitable for wideband, low-noise signal chains. | Select OPA333AIDBVR when offset drift dominates system error budget; choose MAX4250EUK+T when noise and THD+N are critical. |
| AD8605ARTZ-R7 | Higher GBW (10MHz), lower noise (5.2nV/√Hz), but higher IQ (1mA) and no guaranteed 2.4V operation (min 2.7V). | Superior bandwidth and noise for active filters or higher-frequency sensor interfaces; incompatible with 2.4V battery systems. | Select AD8605ARTZ-R7 for high-speed, low-noise applications above 2.7V; retain MAX4250EUK+T for sub-3V battery longevity and THD-critical roles. |
Compared with OPA333AIDBVR and AD8605ARTZ-R7, the MAX4250EUK+T uniquely balances ultra-low THD+N (0.0004%), rail-to-rail output at 2.4V, and 400µA IQ - making it the optimal choice for portable precision measurement where noise, distortion, and power co-constrain design.
Availability
The MAX4250EUK+T is available at Aetrix Electronics and suitable for medical instrumentation, portable data acquisition, digital weighing systems, and battery-powered audio requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for MAX4250EUK+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, and communications markets since 1965.
The MAX4249–MAX4257 family was engineered specifically for single-supply, low-noise, low-distortion signal conditioning in portable and battery-operated systems - emphasizing rail-to-rail output, ground-sensing inputs, and sub-500µA quiescent current without sacrificing AC performance.
FAQ
What is the maximum capacitive load the MAX4250EUK+T can drive without external compensation?
The MAX4250EUK+T is specified to remain stable with capacitive loads up to 400pF when configured in unity-gain. This capability eliminates the need for isolation resistors in typical ADC input buffering and filter applications. For loads exceeding 400pF, a series isolation resistor (e.g., 150Ω for 1000pF) restores phase margin and suppresses peaking, as documented in the device's Typical Operating Characteristics.
Does the MAX4250EUK+T support true rail-to-rail input operation?
No - the MAX4250EUK+T features rail-to-rail *output* operation and a ground-sensing *input* common-mode range (down to VSS − 0.2V), but its input does not extend to VDD. The guaranteed input common-mode range is from VSS − 0.2V to VDD − 1.1V. This design enables robust interfacing with ground-referenced sensors while maintaining excellent CMRR (70dB min) across the usable range.
What is the typical input offset voltage and its temperature coefficient for the MAX4250EUK+T?
The MAX4250EUK+T has a maximum input offset voltage of ±0.75mV over the –40°C to +85°C range, with a typical value of ±70µV at +25°C. Its input offset voltage temperature coefficient is 0.3µV/°C - a key parameter ensuring minimal drift in precision DC-coupled applications such as strain gauge amplifiers and medical sensor front-ends.
Can the MAX4250EUK+T operate from a 2.4V supply while maintaining full AC performance?
Yes - the MAX4250EUK+T is fully specified from 2.4V to 5.5V. At 2.4V, it maintains 3MHz gain-bandwidth, 0.0004% THD+N at 1kHz, and rail-to-rail output swing within 15mV of the rails (typical). Quiescent current drops to 400µA, preserving battery life without compromising signal fidelity - a critical advantage for coin-cell or Li-ion powered portable instruments.
Is the MAX4250EUK+T pin-compatible with other op amps in the MAX4249–MAX4257 family?
No - the MAX4250EUK+T uses a 5-pin SOT23 package with pinout OUT/IN−/IN+/VSS/VDD. Other family members like the MAX4251 (8-pin µMAX) or MAX4252 (dual in 8-pin) have different pin counts and arrangements. While functionally related, they are not pin-compatible; PCB layout must match the specific package and pin configuration of the MAX4250EUK+T.
MAX4250EUK+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:
- 0.3V/µs
- Gain Bandwidth Product:
- 3 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
MAX4250EUK+T FAQ
1.How can I place an order for MAX4250EUK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4250EUK+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 MAX4250EUK+T reliable?
The price and inventory of MAX4250EUK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4250EUK+T is usually 5 days.
3.What payment methods are accepted for MAX4250EUK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4250EUK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4250EUK+T?
MAX4250EUK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4250EUK+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 MAX4250EUK+T?
For technical support, including MAX4250EUK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4250EUK+T requirements.
6.How does Aetrix verify that MAX4250EUK+T is sourced from the original manufacturer or authorized distributors?
All MAX4250EUK+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 MAX4250EUK+T meets industry standards.
7.What is the process for return or replacement of MAX4250EUK+T?
All MAX4250EUK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4250EUK+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 MAX4250EUK+T part is unused and in its original packaging.
Return procedure for MAX4250EUK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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