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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:475
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Product details
Overview
MAX4337EUA+ from Maxim Integrated is a dual rail-to-rail input/output operational amplifier optimized for 32Ω headphone driver applications in portable, single-supply systems. It delivers 50mA output current per channel, operates from 2.7V to 5.5V, features 5MHz gain-bandwidth product, and includes independent shutdown control for each amplifier - enabling ultra-low-power mute mode with 0.04μA supply current per channel.
For engineers reviewing the MAX4337EUA+ datasheet, MAX4337EUA+ pinout, MAX4337EUA+ application, or MAX4337EUA+ equivalent, key selection criteria include rail-to-rail swing into 32Ω loads, THD+N of 0.003% at 20kHz (10kΩ), PSRR of 90dB, thermal overload protection, and μMAX-8 package compatibility with space-constrained audio front-ends.
Technical Context
The MAX4337EUA+ integrates two independent BiCMOS op amps in an 8-pin μMAX package, each featuring complementary NPN/PNP rail-to-rail input stages and a robust output stage capable of sourcing/sinking ≥50mA into 32Ω while maintaining <400mV headroom from rails at VCC = 5V. Its 5MHz GBWP and 1.8V/μs slew rate support high-fidelity audio buffering up to 20kHz with minimal distortion.
Each amplifier includes dedicated SHDN pins (pins 5 and 6) that, when driven low, disable the core and place outputs in high-impedance state while reducing quiescent current to <0.04μA per channel. The device guarantees operation across –40°C to +85°C and incorporates thermal overload protection (trip at +140°C) and smart short-circuit current limiting (110mA clamp).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 5.5V single supply - enables direct integration with Li-ion battery-powered systems without pre-regulation. |
| Output Drive Current | ≥50mA per channel into 32Ω - sufficient to drive stereo headphones at full volume with low distortion. |
| Gain-Bandwidth Product | 5MHz - supports stable unity-gain buffer configurations and preserves audio signal integrity up to 20kHz. |
| THD+N | 0.003% at 20kHz, RL = 10kΩ - meets high-fidelity audio requirements for DAC output buffering. |
| PSRR | 90dB (typ) - eliminates need for separate LDOs in noisy digital power domains. |
| Shutdown Current | <0.04μA per amplifier - enables true zero-power mute during system sleep states. |
| Rail-to-Rail I/O | Input common-mode range extends to GND and VCC; output swing within 100mV of rails (RL = 10kΩ) - maximizes dynamic range in low-voltage systems. |
Pinout & Package
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 | IN1+ | Noninverting input of amplifier 1 - accepts full rail-to-rail common-mode voltage (GND to VCC). |
| 2 | IN1− | Inverting input of amplifier 1 - used for feedback configuration; matched impedance critical for offset minimization. |
| 3 | GND | Analog ground reference - must be connected to low-impedance system ground plane to maintain PSRR and THD performance. |
| 4 | OUT1 | Output of amplifier 1 - capable of sourcing/sinking 50mA into 32Ω with <400mV rail headroom at VCC = 5V. |
| 5 | SHDN1 | Shutdown control for amplifier 1 - logic low disables amplifier and places OUT1 in high-impedance state. |
| 6 | SHDN2 | Shutdown control for amplifier 2 - independent of SHDN1, enabling asymmetric power management. |
| 7 | OUT2 | Output of amplifier 2 - electrically identical to OUT1; supports stereo headphone or dual-channel line driving. |
| 8 | VCC | Positive supply input - requires local 0.1μF ceramic + ≥1μF bulk bypassing to suppress supply noise and ensure stability. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-Rail Input/Output | Enables full dynamic range utilization in 2.7V–5.5V single-supply audio paths without level-shifting circuitry. |
| Independent Dual Shutdown | Per-amplifier SHDN pins allow selective muting - essential for power-aware stereo codecs and hands-free call management. |
| 50mA Output Drive into 32Ω | Eliminates need for external output transistors or discrete buffers in portable headphone amplifier designs. |
| 90dB PSRR | Rejects noise from shared digital supply rails, reducing requirement for dedicated analog LDOs and PCB area. |
| Thermal Overload Protection | Automatically disables amplifiers and enters high-Z state at junction temperature >+140°C - prevents permanent damage during sustained load faults. |
| Capacitive Load Stability | Stable with up to 200pF load capacitance - simplifies layout for PCB traces and connector routing without compensation networks. |
Applications
| 32Ω Headphone Drivers | Portable/Battery-Powered Instruments |
|---|---|
Use Scenario: Driving stereo earbuds or headphones directly from a DAC output in smartphones, wearables, or Bluetooth audio receivers. IC Role / Device Role / Timing Role: Dual-channel audio buffer and output driver delivering low-THD, rail-to-rail swing into 32Ω loads. Use Value: Enables compact, low-BOM-count headphone solutions with 0.003% THD+N at 20kHz and no external biasing components. |
Use Scenario: Signal conditioning and output amplification in handheld test equipment, portable medical sensors, or field-deployable data loggers. IC Role / Device Role / Timing Role: Precision dual op amp providing buffered analog outputs with shutdown capability for power cycling. Use Value: Reduces active power consumption to sub-μA during idle periods while preserving fast wake-up (<5μs enable time) and rail-to-rail signal fidelity. |
| Hands-Free Car Phones | DAC/ADC Buffers |
Use Scenario: Amplifying microphone and speaker signals in automotive hands-free modules where EMI immunity and thermal reliability are critical. IC Role / Device Role / Timing Role: Dual op amp performing microphone preamplification and speaker driver functions with independent mute control. Use Value: 90dB PSRR rejects alternator ripple; thermal protection ensures safe operation in hot vehicle cabins; μMAX-8 footprint saves board space. |
Use Scenario: Buffering high-resolution DAC outputs or conditioning ADC inputs in audio SoCs, industrial controllers, or audio processing units. IC Role / Device Role / Timing Role: Low-noise, high-drive buffer isolating sensitive converter cores from reactive loads and PCB parasitics. Use Value: 26nV/√Hz input voltage noise and 5MHz GBWP preserve SNR and bandwidth; rail-to-rail I/O avoids clipping in ±1.35V full-scale systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4337EKA+T | Same electrical specs, but in 8-pin SOT23-8 package (larger 4.9mm × 6.0mm footprint, no exposed thermal pad) | Suitable for legacy SOT23 layouts; lower thermal performance limits continuous 50mA drive into 32Ω at elevated ambient temperatures | Select MAX4337EKA+T only if SOT23-8 land pattern is fixed and thermal derating can be accommodated. |
| OPA2350UA | Single-supply, rail-to-rail I/O op amp; 38mA output drive, 3.8MHz GBWP, 0.0006% THD+N at 1kHz (10kΩ); no shutdown function | Lacks independent shutdown and thermal protection; lower output current limits use in 32Ω headphone drivers to moderate volumes | Choose OPA2350UA only when ultra-low distortion at low frequencies is prioritized over headphone drive capability and power management. |
Compared with MAX4337EKA+T, MAX4337EUA+ offers superior thermal dissipation via its μMAX package's exposed pad, enabling reliable 50mA drive into 32Ω at +85°C ambient; versus OPA2350UA, it provides higher output current, integrated shutdown, and thermal protection - making it uniquely suited for portable audio output stages requiring both fidelity and robustness.
Availability
MAX4337EUA+ is available at Aetrix Electronics and suitable for portable audio systems, battery-powered instrumentation, and automotive hands-free modules requiring stable component supply, RoHS-compliant packaging, and guaranteed -40°C to +85°C operation.
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, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX4335–MAX4338 family was designed specifically for low-voltage, high-output-current audio buffering - targeting space-constrained portable devices needing rail-to-rail swing, low THD+N, and intelligent power management in miniature packages.
FAQ
What is the maximum continuous output current per channel of the MAX4337EUA+?
The MAX4337EUA+ delivers ≥50mA per channel into a 32Ω load while maintaining specified output voltage swing and THD+N performance. This is validated across the full operating temperature range (–40°C to +85°C) and supply range (2.7V to 5.5V). Exceeding 50mA continuously may trigger thermal protection or exceed package power dissipation limits - especially in the μMAX-8 package at high ambient temperatures.
Does the MAX4337EUA+ support true rail-to-rail input and output operation?
Yes, the MAX4337EUA+ features rail-to-rail input and output stages. Its input common-mode voltage range extends from GND to VCC, and its output swing reaches within 100mV of each rail under light loads (RL = 10kΩ) and within 400mV under full 32Ω load at VCC = 5V. This enables maximum dynamic range in single-supply audio systems without external level-shifting circuitry.
How does the shutdown functionality work on the MAX4337EUA+?
The MAX4337EUA+ has two independent shutdown pins: SHDN1 (pin 5) controls amplifier 1, and SHDN2 (pin 6) controls amplifier 2. Driving either pin low disables its respective amplifier, reduces supply current to <0.04μA, and places the output in high-impedance state. Pulling the pin high or connecting it to VCC enables normal operation. No external pull-up is required.
What package type is used for the MAX4337EUA+ and what are its thermal advantages?
The MAX4337EUA+ uses an 8-pin μMAX package (U8+1, outline 21-0036) with an exposed thermal pad. This package provides significantly better thermal resistance than the SOT23-8 alternative (MAX4337EKA+T), allowing sustained 50mA output drive into 32Ω loads at elevated ambient temperatures. The exposed pad must be soldered to a thermal copper plane for optimal performance.
Can the MAX4337EUA+ drive capacitive loads, and what is the maximum stable value?
Yes, the MAX4337EUA+ is stable driving capacitive loads up to 200pF with resistive loads ≥100Ω. For larger capacitive loads (e.g., >200pF), adding a small isolation resistor (e.g., 39Ω) in series with the output restores phase margin and prevents peaking or oscillation. This capability simplifies PCB routing and connector interface design without requiring complex compensation networks.
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:
- Active
- 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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