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Analog Devices Inc./Maxim Integrated MAX4337EUA
- Part No.:
- MAX4337EUA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX4337EUA.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,271
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Product details
Overview
MAX4337EUA from Maxim Integrated is a dual rail-to-rail input/output operational amplifier in an 8-pin μMAX package, delivering 50mA output drive per channel into 32Ω loads from a single 2.7V–5.5V supply. It features 5MHz gain-bandwidth, 90dB PSRR, and shutdown mode reducing supply current to <0.04μA per amplifier - optimized for stereo headphone drivers in portable audio systems.
For engineers reviewing the MAX4337EUA datasheet, MAX4337EUA pinout, MAX4337EUA application, or MAX4337EUA equivalent, key selection criteria include its dual-channel 50mA drive capability, rail-to-rail I/O swing at low supply voltage, thermal overload protection, and μMAX package compatibility with space-constrained portable designs.
Technical Context
The MAX4337EUA integrates two independent high-output-current amplifiers with separate NPN/PNP input stages enabling true rail-to-rail common-mode input range (GND to VCC) and output swing within 400mV of rails under 32Ω load. Its BiCMOS process supports fast settling (2μs to 0.01%) and stable operation with capacitive loads up to 200pF.
Shutdown control is implemented via dedicated SHDN1/SHDN2 pins (pins 5 and 6), each placing its respective amplifier's output in high-impedance state while drawing <0.04μA supply current at VCC = 5V. The device includes smart short-circuit protection limiting output current to 110mA when (VCC − VOUT) > 1V (sourcing) or VOUT > 1V (sinking).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 5.5V single supply - enables direct battery operation from Li-ion (3.0–4.2V) or two AA cells (3.0V). |
| Output Drive Current | ±50mA per channel into 32Ω - sufficient to drive stereo headphones at 40mW/channel without external buffers. |
| Gain-Bandwidth Product | 5MHz - supports full-power bandwidth of 280kHz at 2VP-P, adequate for audio signal conditioning up to 20kHz with margin. |
| PSRR | 90dB (typ) - eliminates need for pre-regulation in noisy battery-powered systems, improving power efficiency. |
| THD + Noise | 0.003% at 10kHz into 10kΩ - meets high-fidelity audio requirements for DAC buffering and line driving. |
| Shutdown Supply Current | <0.04μA per amplifier - extends battery life in always-on portable devices with intermittent audio playback. |
| Operating Temperature | −40°C to +85°C - qualified for industrial and automotive cabin environments. |
Pinout & Package
The MAX4337EUA is housed in an 8-pin μMAX package (package code U8+1, outline 21-0036), measuring 3.0mm × 3.0mm × 0.8mm with exposed pad for thermal enhancement. Pin 1 is marked by a dot; pin numbering follows standard μMAX top-view convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | IN2− | Inverting input of Channel 2 - connects to feedback network in inverting configurations. |
| 2 | IN2+ | Noninverting input of Channel 2 - accepts signal source with matched impedance to minimize bias-current offset. |
| 3 | GND | Analog ground reference - must be connected to low-impedance system ground plane to maintain PSRR and THD performance. |
| 4 | OUT2 | Output of Channel 2 - capable of sourcing/sinking ±50mA into 32Ω; requires local 0.1μF bypass capacitor near pin. |
| 5 | SHDN1 | Shutdown control for Channel 1 - logic-low (≤0.3×VCC) disables amplifier and places OUT1 in high-Z state. |
| 6 | SHDN2 | Shutdown control for Channel 2 - independent of SHDN1, enabling asymmetric power management in stereo applications. |
| 7 | OUT1 | Output of Channel 1 - electrically identical to OUT2; supports independent loading and decoupling. |
| 8 | VCC | Positive supply - must be bypassed with 0.1μF ceramic + ≥1μF bulk capacitor to suppress supply noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-Rail Input/Output | Input common-mode range extends from GND to VCC; output swings within 400mV of rails into 32Ω - maximizes dynamic range on 2.7V supply. |
| Dual Independent Shutdown | SHDN1/SHDN2 pins allow per-channel enable/disable - enables power-gating of unused channel in mono playback or adaptive audio routing. |
| Thermal Overload Protection | Automatically disables outputs and reduces ICC to 120μA when junction temperature exceeds +140°C - prevents permanent damage during sustained high-current operation. |
| Capacitive-Load Stability | Stable with up to 200pF load capacitance without external compensation - simplifies PCB layout for LCD bias, sensor interface, or filter applications. |
| Smart Short-Circuit Protection | Current-limited to 110mA only when (VCC − VOUT) > 1V (sourcing) or VOUT > 1V (sinking) - preserves full output swing capability below threshold. |
Applications
| Stereo Headphone Driver | Portable DAC Output Buffer |
|---|---|
|
Use Scenario: Driving 32Ω stereo headphones from a low-voltage portable media player with battery life constraints. IC Role / Device Role / Timing Role: Dual-channel voltage follower/buffer delivering 40mW/channel while maintaining THD < 0.005% at 10kHz. Use Value: Eliminates need for discrete output coupling capacitors due to rail-to-rail output swing, reducing BOM count and board area. |
Use Scenario: Buffering high-resolution DAC outputs (e.g., 24-bit/192kHz) in Bluetooth headphones or USB-C audio adapters. IC Role / Device Role / Timing Role: Low-noise, high-slew-rate (1.8V/μs) op amp preserving signal integrity across full audio band with minimal group delay. Use Value: 26nV/√Hz input voltage noise and 0.003% THD ensure audible transparency in critical listening applications. |
| Wireless PA Control Interface | Transformerless Line Driver |
|
Use Scenario: Providing programmable analog gain control to RF power amplifiers in cellular IoT modules with tight space budgets. IC Role / Device Role / Timing Role: Dual op amp configured as precision variable-gain stage with shutdown-controlled mute during transmit/receive switching. Use Value: Sub-1μs enable/disable time and <0.04μA shutdown current minimize RF burst latency and preserve battery runtime between transmissions. |
Use Scenario: Driving balanced/unbalanced line-level signals (e.g., 2VRMS) into 600Ω professional audio equipment without output transformers. IC Role / Device Role / Timing Role: High-output-current driver delivering ±50mA into reactive loads while maintaining 95dB large-signal voltage gain. Use Value: 90dB PSRR rejects switch-mode power supply noise, eliminating audible hum in mixed-signal embedded audio systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual high-output-current op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4337EKA+T | Same electrical specs but in 8-pin SOT23 package (larger footprint, lower thermal resistance than μMAX). | Better heat dissipation in continuous 50mA operation; less suitable for ultra-thin wearables. | Select for higher ambient temperature operation (>70°C) where μMAX thermal limits may be exceeded. |
| OPA2350EA/250 | Single-supply rail-to-rail op amp with 44mA drive, 38MHz GBW, and 1.2mV VOS max - no integrated shutdown. | Lacks independent shutdown pins; requires external logic for power gating; higher bandwidth trades off power efficiency. | Choose when higher speed (e.g., active filters >100kHz) is prioritized over ultra-low shutdown current and dual-channel integration. |
Compared with MAX4337EKA+T, the MAX4337EUA offers superior board-area efficiency in space-constrained designs but requires careful thermal design above 70°C ambient; versus OPA2350EA/250, it delivers lower quiescent current in shutdown and native dual-channel integration, simplifying stereo signal paths.
Availability
MAX4337EUA is available at Aetrix Electronics and suitable for portable audio systems, battery-powered instrumentation, and wireless communication interfaces requiring stable component supply with guaranteed long-term manufacturability.
Supply support for MAX4337EUA 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
Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog and mixed-signal ICs for power, sensing, connectivity, and signal processing.
The MAX4335–MAX4338 family was designed specifically for low-voltage, high-output-current audio driver applications - balancing rail-to-rail performance, thermal robustness, and ultra-low-power shutdown in miniature packages.
FAQ
What is the maximum output current capability of the MAX4337EUA per channel?
The MAX4337EUA delivers ±50mA output current per channel into 32Ω loads at VCC = 2.7V and VCC = 5V, as verified across temperature (−40°C to +85°C). This is sufficient to drive stereo 32Ω headphones at 40mW/channel. Short-circuit protection activates at 110mA only when (VCC − VOUT) > 1V (sourcing) or VOUT > 1V (sinking), preserving full drive capability below those thresholds.
Does the MAX4337EUA support true rail-to-rail input and output operation?
Yes, the MAX4337EUA supports true rail-to-rail input (common-mode range from GND to VCC) and output (swing within 400mV of rails into 32Ω at VCC = 2.7V). Its dual NPN/PNP input stage ensures continuous operation across the entire supply range, and the output stage achieves millivolt-level headroom to both rails under typical loads - critical for maximizing dynamic range in low-voltage portable audio.
How does the shutdown functionality work on the MAX4337EUA?
The MAX4337EUA features two independent shutdown pins: SHDN1 (pin 5) controls Channel 1 and SHDN2 (pin 6) controls Channel 2. Driving either pin low (≤0.3×VCC) reduces its amplifier's supply current to <0.04μA and places its output in high-impedance state. Both channels remain fully functional when pins are tied to VCC or left open (internal pull-up not present - external pull-up required for default-on operation).
What package type is used for the MAX4337EUA, and what are its key mechanical dimensions?
The MAX4337EUA uses an 8-pin μMAX package (outline 21-0036), measuring 3.0mm × 3.0mm × 0.8mm with an exposed thermal pad. It has a 0.65mm pin pitch and requires a land pattern per Maxim document 90-0092. This compact package enables high-density layouts in ultra-thin portable devices, though thermal derating (4.5mW/°C above +70°C) must be observed for continuous 50mA operation.
Can the MAX4337EUA drive capacitive loads, and what is the stability limit?
Yes, the MAX4337EUA is stable driving capacitive loads up to 200pF without external compensation, as confirmed in the datasheet's AC Electrical Characteristics and Typical Operating Characteristics. For loads exceeding 200pF (e.g., 330pF), adding a small isolation resistor (e.g., 39Ω) in series with the output restores stability - a technique validated in Figures 8–10 of the MAX4335–MAX4338 datasheet.
MAX4337EUA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 1.8V/µs
- Gain Bandwidth Product:
- 5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 100 nA
- Voltage - Input Offset:
- 600 µV
- Current - Supply:
- 1.3mA (x2 Channels)
- Current - Output / Channel:
- 110 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-uMAX/uSOP
MAX4337EUA FAQ
1.How can I place an order for MAX4337EUA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4337EUA 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 MAX4337EUA reliable?
The price and inventory of MAX4337EUA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4337EUA is usually 5 days.
3.What payment methods are accepted for MAX4337EUA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4337EUA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4337EUA?
MAX4337EUA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4337EUA 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 MAX4337EUA?
For technical support, including MAX4337EUA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4337EUA requirements.
6.How does Aetrix verify that MAX4337EUA is sourced from the original manufacturer or authorized distributors?
All MAX4337EUA 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 MAX4337EUA meets industry standards.
7.What is the process for return or replacement of MAX4337EUA?
All MAX4337EUA units undergo pre-shipment inspection (PSI). If there is an issue with MAX4337EUA, 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 MAX4337EUA part is unused and in its original packaging.
Return procedure for MAX4337EUA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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