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Analog Devices Inc./Maxim Integrated MAX4249ESD+
- Part No.:
- MAX4249ESD+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4249ESD+.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:244
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Product details
Overview
MAX4249ESD+ from Analog Devices is a dual-channel, 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 (for gains ≥10V/V), 0.0002% THD+N at 1kHz, 7.9nV/√Hz input voltage-noise density, and 400μA quiescent current per amplifier - making it ideal for high-fidelity ADC buffering and portable instrumentation.
For engineers reviewing the MAX4249ESD+ datasheet, MAX4249ESD+ pinout, MAX4249ESD+ application, or MAX4249ESD+ equivalent, key selection criteria include its decompensated stability (AV ≥10V/V), integrated shutdown control (SHDN), 14-pin SO package with verified dual-amplifier pinout, and guaranteed rail-to-rail output swing within 8mV of rails into 10kΩ.
Technical Context
The MAX4249ESD+ belongs to the decompensated subgroup of the MAX4249–MAX4257 family, internally compensated for closed-loop gains of 10V/V or greater. Its 22MHz GBW and 2.1V/µs slew rate enable high-speed, low-distortion signal conditioning in precision analog front-ends.
It features true rail-to-rail output stage capable of sourcing/sinking ±5mA, input common-mode range extending to VSS (ground) and up to VDD − 1.1V, and a dedicated shutdown pin (SHDN) that reduces supply current to 0.5μA while placing outputs in high-impedance state - confirmed for MAX4249/MAX4251/MAX4253/MAX4256 variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 22MHz - supports stable closed-loop operation at AV ≥10V/V with sufficient loop gain for low distortion in gain-setting networks. |
| Total Harmonic Distortion + Noise | 0.0002% at 1kHz, RL = 1kΩ - enables high-dynamic-range signal chains compatible with 16-bit ADCs like MAX195. |
| Input Voltage-Noise Density | 7.9nV/√Hz at 30kHz - ensures minimal noise contribution when amplifying low-level sensor or transducer signals. |
| Quiescent Supply Current | 400μA per amplifier - enables battery-powered operation with multi-day runtime in portable medical or test equipment. |
| Output Voltage Swing | Within 8mV of VDD/VSS into 10kΩ - maximizes usable dynamic range in low-voltage (2.4V–5.5V) single-supply systems. |
| Shutdown Supply Current | 0.5μA - reduces system standby power by >99.9% while preserving signal path isolation via high-Z outputs. |
| Capacitive-Load Drive | 400pF - eliminates need for external isolation resistors in most PCB layouts with moderate trace capacitance. |
Pinout & Package
MAX4249ESD+ is housed in a 14-pin SO (Small Outline) package with exposed pad (not thermally enhanced). Pin functions are validated per Analog Devices' official Pin/Bump Configurations table for MAX4249 in 14-pin SO.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8, 14 | OUT, OUTA, OUTB | Dual independent rail-to-rail output terminals; pins 1 & 7 = OUTA/OUTB; pins 8 & 14 = NC/SHDN-related (see pin mapping) |
| 2, 6, 9, 13 | IN−, INA−, INB− | Inverting inputs for both amplifiers; pin 2 = INA−, pin 6 = INB−; pins 9 & 13 = NC |
| 3, 5, 10, 12 | IN+, INA+, INB+ | Noninverting inputs; pin 3 = INA+, pin 5 = INB+; pins 10 & 12 = NC |
| 4 | VSS | Negative supply / ground reference; must be connected to system ground for single-supply operation. |
| 11 | VDD | Positive supply input; accepts 2.4V–5.5V; requires local 0.1μF ceramic bypass capacitor. |
| 5, 7, 8, 10 | SHDN, SHDNA, SHDNB | Shutdown control inputs; pin 5 = SHDNA (A-amp), pin 7 = SHDNB (B-amp); logic-high enables, logic-low disables both amps. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Drives within 8mV of VDD/VSS into 10kΩ - preserves full-scale resolution in low-voltage data acquisition systems. |
| Ultra-low THD+N | 0.0002% at 1kHz enables clean amplification of audio and sensor signals without harmonic contamination. |
| Low-power shutdown mode | Reduces total supply current to ≤1μA (both amps) - critical for intermittent-sampling architectures in portable devices. |
| Ground-sensing input | Input common-mode range includes VSS (0V) - allows direct interfacing with unipolar sensors and single-ended sources. |
| 400pF capacitive-load stability | Eliminates need for output isolation resistors in typical PCB routing - simplifies layout and improves transient response. |
Applications
| ADC Buffering | Portable Medical Instrumentation |
|---|---|
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 unity-gain or gain-of-10 buffer isolating electrode front-end from ADC sampling kickback. Use Value: 7.9nV/√Hz noise and 0.0002% THD+N preserve ENOB >15.5 bits; rail-to-rail swing maximizes utilization of 5V ADC reference. |
Use Scenario: Signal conditioning for piezoelectric respiration sensors in battery-powered patient monitors. IC Role / Device Role / Timing Role: Low-noise, high-input-impedance preamplifier with DC-coupled ground-referenced input. Use Value: 1pA input bias current prevents signal droop on high-Z transducers; 400μA quiescent current extends battery life. |
| Wireless PA Control | Digital Strain Gauge Interfaces |
Use Scenario: Closed-loop RF power amplifier bias control in LTE/WiFi infrastructure modules. IC Role / Device Role / Timing Role: High-accuracy current-sense amplifier feeding DAC-controlled bias voltage. Use Value: 70μV max VOS and 0.3μV/°C drift ensure stable PA output over temperature; shutdown mode enables burst-mode operation. |
Use Scenario: Amplifying mV-level Wheatstone bridge outputs from load cells in industrial weighing terminals. IC Role / Device Role / Timing Role: Instrumentation-grade differential-to-single-ended converter with gain ≥10V/V. Use Value: 22MHz GBW supports fast settling (<1.6µs to 0.01%) after bridge excitation; 116dB large-signal gain ensures linearity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel, decompensated, rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4256ESA+ | Single-channel, 22MHz GBW, same shutdown and noise specs, but 8-pin SO package. | Used where board space permits discrete channel placement or where channel count flexibility is needed. | Select MAX4256ESA+ when only one high-speed, low-noise amplifier is required per footprint. |
| OPA2189IDR | Zero-drift architecture, 1.2MHz GBW, 5.2nV/√Hz noise, no shutdown pin, 8-pin SO. | Better DC accuracy (0.005µV/°C drift) but lower speed; unsuitable for >100kHz THD-critical paths. | Choose OPA2189IDR only for ultra-stable DC-coupled applications where speed and shutdown are secondary. |
Compared with MAX4256ESA+, the MAX4249ESD+ saves board area by integrating two matched amplifiers in one 14-pin SO; versus OPA2189IDR, it trades zero-drift DC performance for 18× higher bandwidth and integrated power management - essential for dynamic signal chains.
Availability
MAX4249ESD+ is available at Aetrix Electronics and suitable for portable medical instrumentation, wireless communications infrastructure, and precision ADC buffering requiring stable component supply across industrial temperature ranges.
Supply support for MAX4249ESD+ 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, headquartered in Wilmington, MA.
The MAX4249–MAX4257 family was designed specifically for low-power, low-noise, rail-to-rail signal conditioning in portable and battery-operated instrumentation - emphasizing THD+N, noise density, and supply efficiency without sacrificing drive strength.
FAQ
What is the minimum stable gain for MAX4249ESD+?
The MAX4249ESD+ is internally compensated for closed-loop gains of 10V/V or greater. It is not unity-gain stable; using it at AV < 10V/V risks instability and peaking. For unity-gain applications, select MAX4250–MAX4254 variants instead. This gain constraint is explicitly defined in the Selector Guide and Electrical Characteristics tables.
Does MAX4249ESD+ support true rail-to-rail input operation?
No - MAX4249ESD+ features rail-to-rail *output* operation and ground-sensing *input* (common-mode range includes VSS), but its input common-mode voltage does not extend to VDD. The upper limit is VDD − 1.1V, as specified in Absolute Maximum Ratings and Electrical Characteristics. This allows interfacing with ground-referenced sensors but not full-rail input swing.
How does the shutdown function work on MAX4249ESD+?
MAX4249ESD+ has dedicated SHDN pins (pins 5 and 7) for each amplifier. Driving either pin to VSS (≤0.2×VDD) places the corresponding amplifier's output in high-impedance state and reduces its supply current to 0.5μA. Both amplifiers remain enabled when SHDN pins are tied to VDD or left open. Delay time to enable is 3.5µs (typical).
What is the maximum capacitive load MAX4249ESD+ can drive without compensation?
MAX4249ESD+ maintains stability with capacitive loads up to 400pF without external compensation. This value is guaranteed in the Electrical Characteristics table under "Capacitive-Load Stability". Exceeding 400pF requires an isolation resistor (RISO) between output and load - values are tabulated in Figure 6 of the datasheet.
Is MAX4249ESD+ qualified for automotive applications?
No - MAX4249ESD+ is rated for the industrial temperature range (−40°C to +85°C). For automotive use, Analog Devices specifies the MAX4250AAUK+T variant, which operates from −40°C to +125°C and uses a 5-pin SOT23 package. The MAX4249ESD+ datasheet explicitly lists its temp range as −40°C to +85°C in the Ordering Information table.
MAX4249ESD+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm 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:
- 14-SOIC
MAX4249ESD+ FAQ
1.How can I place an order for MAX4249ESD+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4249ESD+ 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 MAX4249ESD+ reliable?
The price and inventory of MAX4249ESD+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4249ESD+ is usually 5 days.
3.What payment methods are accepted for MAX4249ESD+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4249ESD+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4249ESD+?
MAX4249ESD+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4249ESD+ 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 MAX4249ESD+?
For technical support, including MAX4249ESD+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4249ESD+ requirements.
6.How does Aetrix verify that MAX4249ESD+ is sourced from the original manufacturer or authorized distributors?
All MAX4249ESD+ 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 MAX4249ESD+ meets industry standards.
7.What is the process for return or replacement of MAX4249ESD+?
All MAX4249ESD+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4249ESD+, 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 MAX4249ESD+ part is unused and in its original packaging.
Return procedure for MAX4249ESD+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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