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Analog Devices Inc./Maxim Integrated MAX4249EUB+
- Part No.:
- MAX4249EUB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX4249EUB+.pdf
- Description:
- IC OPAMP GP 2 CIRC 10UMAX/USOP
- Quantity:
- Payment:
- Shipping:
Inventory:634
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Product details
Overview
MAX4249EUB+ from Analog Devices is a dual, low-noise, low-distortion, rail-to-rail output operational amplifier optimized for single-supply operation from 2.4V to 5.5V. It delivers 22MHz gain-bandwidth product at AV ≥ 10V/V, 0.0002% THD+N (1kHz, 1kΩ), 7.9nV/√Hz input voltage-noise density, and 400μA quiescent current per amplifier - making it ideal for precision ADC buffering and portable instrumentation.
For engineers reviewing the MAX4249EUB+ datasheet, MAX4249EUB+ pinout, MAX4249EUB+ application, or MAX4249EUB+ equivalent, key selection criteria include its decompensated stability (AV ≥ 10V/V), integrated shutdown mode (0.5μA), rail-to-rail swing within 8mV of rails (10kΩ), ultra-low input bias current (1pA), and 10-pin μMAX package compatibility with space-constrained designs.
Technical Context
The MAX4249EUB+ is a decompensated dual op amp requiring minimum closed-loop gain of 10V/V for stability, enabling 22MHz GBW and 2.1V/μs slew rate - significantly higher than unity-gain-stable variants like MAX4250–MAX4254 (3MHz GBW). Its input stage features FET-based topology with 1pA bias current and ground-sensing common-mode range (down to VSS − 0.2V).
It integrates active shutdown control (SHDNA/SHDNB pins) that places both outputs in high-impedance state while reducing total supply current to 0.5μA. The device drives capacitive loads up to 400pF without oscillation and maintains DC accuracy into 1kΩ loads, supporting direct interface with SAR ADCs and high-impedance sensors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 22MHz - enables stable closed-loop operation at AV ≥ 10V/V for high-speed signal conditioning |
| Total Harmonic Distortion + Noise | 0.0002% at 1kHz, 2VP-P, RL = 1kΩ - preserves signal fidelity in audio and precision measurement paths |
| Input Voltage-Noise Density | 7.9nV/√Hz at 30kHz - minimizes added noise in wideband sensor front-ends and ADC drivers |
| Quiescent Supply Current | 400μA per amplifier - supports battery-powered systems with multi-day runtime |
| Output Voltage Swing | Within 8mV of rails (VDD/VSS) with 10kΩ load - maximizes dynamic range in low-voltage (2.4V–5.5V) systems |
| Input Bias Current | 1pA (typ) - prevents loading errors when interfacing with high-impedance sources (e.g., piezoelectric transducers) |
| Shutdown Supply Current | 0.5μA - reduces system standby power by >99.9% vs. active mode |
Pinout & Package
The MAX4249EUB+ is housed in a 10-pin μMAX® package (3mm × 3mm, 0.5mm pitch), RoHS-compliant and lead-free (+ suffix). Pinout is validated per Analog Devices' official pin configuration diagram for MAX4249 in μMAX format.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 9 | OUTA / OUTB | Dual independent amplifier outputs - rail-to-rail capable, high-impedance in shutdown |
| 2, 8 | INA− / INB− | Inverting inputs - matched for differential gain accuracy and CMRR optimization |
| 3, 11 | INA+ / INB+ | Noninverting inputs - support ground-referenced sensing with extended common-mode range (to VSS − 0.2V) |
| 4, 10 | VSS | Negative supply - connect to ground in single-supply configurations |
| 5, 7 | VDD | Positive supply - accepts 2.4V–5.5V; requires local 0.1μF ceramic bypass |
| 6 | SHDNA | Shutdown control for Amplifier A - logic low disables output and reduces IQ to 0.5μA |
| 12 | SHDNB | Shutdown control for Amplifier B - independent control enables selective channel power gating |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Drives within 8mV of VDD/VSS under 10kΩ load - preserves full-scale resolution in low-voltage ADC interfaces |
| Ultra-low input current noise | 0.5fA/√Hz - critical for Johnson-noise-limited applications with high-source-impedance transducers |
| Capacitive-load stability | Stable with up to 400pF - eliminates need for external isolation resistors in most PCB trace and filter capacitor scenarios |
| High open-loop gain | 116dB large-signal voltage gain - ensures <10ppm gain error in precision buffer and instrumentation amplifier configurations |
| Low input offset voltage | ±70μV (max) - reduces DC error in precision gain stages and sensor signal chains without trimming |
Applications
| ADC Buffering | Portable Medical Sensors |
|---|---|
Use Scenario: Driving the input of a 16-bit SAR ADC (e.g., MAX195) in a handheld ECG monitor. IC Role / Device Role / Timing Role: Precision voltage follower/buffer isolating high-impedance electrode signals from ADC sampling capacitance. Use Value: 7.9nV/√Hz noise and 0.0002% THD+N prevent SNR degradation; rail-to-rail swing maximizes utilization of 5V ADC reference. | Use Scenario: Signal conditioning for piezoresistive strain gauges in a battery-powered digital scale. IC Role / Device Role / Timing Role: Low-noise, low-drift instrumentation amplifier front-end with ground-sensing capability. Use Value: 1pA input bias current avoids gauge bridge imbalance; 400μA IQ extends coin-cell life beyond 12 months. |
| Wireless PA Control | Industrial Process Monitoring |
Use Scenario: Closed-loop RF power amplifier bias control in a 2.4GHz ISM-band transmitter module. IC Role / Device Role / Timing Role: High-speed feedback amplifier regulating PA drain current via DAC-controlled loop. Use Value: 22MHz GBW and 2.1V/μs slew rate enable fast transient response to PA envelope variations without overshoot. | Use Scenario: Isolating and amplifying 4–20mA loop sensor outputs in a factory-floor temperature controller. IC Role / Device Role / Timing Role: Rail-to-rail I/V converter and level-shifting buffer operating from 3.3V supply. Use Value: Input common-mode range including ground allows direct connection to current-sink sensors; shutdown mode cuts idle power during sleep cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual, decompensated, low-noise op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4256ESA+ | Same 22MHz GBW, 10V/V min gain, and shutdown function; differs in SO-8 package (larger footprint, no μMAX pinout) | Preferred where board area is less constrained and SO-8 reflow compatibility is required | Select MAX4256ESA+ for legacy SO-8 layouts or thermal dissipation needs (>362mW derating) |
| OPA2189IDR | Zero-drift architecture (0.005μV/°C TCVOS), lower VOS (±25μV), but higher IQ (1.3mA) and no shutdown mode | Better for DC-critical applications (e.g., weigh scales) where drift dominates over power | Choose OPA2189IDR only if offset drift <0.1μV/°C is mandatory and battery life is secondary |
Compared with MAX4256ESA+, the MAX4249EUB+ offers identical AC performance in a 3×3mm μMAX package for space-constrained designs; versus OPA2189IDR, it trades zero-drift precision for 3.25× lower quiescent current and integrated shutdown - critical for portable, duty-cycled systems.
Availability
MAX4249EUB+ is available at Aetrix Electronics and suitable for portable medical devices, wireless transceiver control loops, and precision ADC buffering requiring stable component supply across industrial and consumer production programs.
Supply support for MAX4249EUB+ 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 ultra-low-noise, low-distortion, single-supply signal conditioning in battery-powered and space-constrained applications - emphasizing rail-to-rail operation, sub-1pA bias current, and configurable shutdown.
FAQ
What is the minimum stable gain for MAX4249EUB+ and why does it matter?
The MAX4249EUB+ requires a minimum closed-loop gain of 10V/V for stability due to its decompensated internal design. This enables its 22MHz gain-bandwidth product and 2.1V/μs slew rate - significantly faster than unity-gain-stable op amps. Using it at gains below 10V/V risks oscillation and degraded phase margin. Always verify stability with simulation or bench testing when configuring feedback networks.
Does MAX4249EUB+ support true ground-sensing input operation?
Yes. The MAX4249EUB+ guarantees an input common-mode voltage range extending to VSS − 0.2V (i.e., 200mV below ground in single-supply mode), enabling direct interface with ground-referenced sensors and preventing phase reversal during overdrive. This is confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables, where VCM min is specified as −0.2V at E temperature.
Can MAX4249EUB+ drive a 1kΩ load while maintaining rail-to-rail output swing?
Yes - the MAX4249EUB+ maintains rail-to-rail output swing (within 77mV of VDD and 47mV of VSS) even with a 1kΩ load to ground, as verified in the Electrical Characteristics table under "Output Voltage Swing" conditions. This capability supports direct driving of low-impedance ADC inputs and analog switches without external buffers.
How does the shutdown mode affect output state in MAX4249EUB+?
In shutdown mode (SHDNA or SHDNB pulled low), the corresponding amplifier's output enters a high-impedance state - electrically disconnected from the output node - while supply current drops to 0.5μA per channel. This prevents loading of downstream circuitry and enables independent channel power gating, as documented in the Features section and Electrical Characteristics (ILEAK specification).
Is feed-forward compensation required for MAX4249EUB+ at AV = 10V/V?
Yes - for optimal pulse response and phase margin at AV = 10V/V, Analog Devices recommends adding a feed-forward capacitor CZ = 11pF × (RF/RG) between the inverting input and output. This compensates for the 11pF input capacitance interacting with high-impedance feedback networks (RG || RF > 5kΩ), preventing peaking and instability observed in Figures 2a/2b of the datasheet.
MAX4249EUB+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- 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 (x2 Channels)
- 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:
- 10-uMAX/uSOP
MAX4249EUB+ FAQ
1.How can I place an order for MAX4249EUB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4249EUB+ 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 MAX4249EUB+ reliable?
The price and inventory of MAX4249EUB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4249EUB+ is usually 5 days.
3.What payment methods are accepted for MAX4249EUB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4249EUB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4249EUB+?
MAX4249EUB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4249EUB+ 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 MAX4249EUB+?
For technical support, including MAX4249EUB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4249EUB+ requirements.
6.How does Aetrix verify that MAX4249EUB+ is sourced from the original manufacturer or authorized distributors?
All MAX4249EUB+ 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 MAX4249EUB+ meets industry standards.
7.What is the process for return or replacement of MAX4249EUB+?
All MAX4249EUB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4249EUB+, 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 MAX4249EUB+ part is unused and in its original packaging.
Return procedure for MAX4249EUB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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