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Analog Devices Inc./Maxim Integrated MAX4338EUB+
- Part No.:
- MAX4338EUB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX4338EUB+.pdf
- Description:
- IC OPAMP GP 2 CIRC 10UMAX/USOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,135
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Product details
Overview
MAX4338EUB+ 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, and includes independent shutdown/mute control (SHDN1/SHDN2) reducing supply current to <0.04μA per amplifier.
For engineers reviewing the MAX4338EUB+ datasheet, MAX4338EUB+ pinout, MAX4338EUB+ application, or MAX4338EUB+ equivalent, key selection criteria include its 10-pin μMAX package, dual-channel rail-to-rail I/O performance into low-impedance loads, ultra-low shutdown current, thermal overload protection, and compatibility with battery-powered audio interfaces requiring high dynamic range and minimal quiescent power.
Technical Context
The MAX4338EUB+ implements a BiCMOS rail-to-rail input stage using complementary NPN/PNP differential pairs, enabling full common-mode voltage range (GND to VCC) and eliminating phase reversal on overdrive. Its output stage supports true rail-to-rail swing-within 400mV of VCC and GND at 50mA into 32Ω-and integrates smart short-circuit protection that limits current to 110mA only when (VCC − VOUT) > 1V (sourcing) or VOUT > 1V (sinking).
Each amplifier features independent shutdown logic: driving SHDNx low disables the channel, placing its output in high-impedance state and reducing ICC to <0.04μA (VCC = 5V); driving SHDNx high enables operation. The device maintains 90dB PSRR and 80dB CMRR over −40°C to +85°C, minimizing need for pre-regulation in noisy portable power domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 5.5V single supply - enables direct integration with Li-ion/Li-poly battery rails without LDO pre-regulation. |
| Output Drive Current | ±50mA per channel into 32Ω - sufficient to drive stereo headphones at 2VP-P with <0.01% THD+N at 1kHz. |
| Gain-Bandwidth Product | 5MHz - supports stable unity-gain buffer configurations and bandwidth-critical audio signal paths up to ~280kHz full-power. |
| Rail-to-Rail I/O | Input common-mode range: GND to VCC; output swing: within 400mV of both rails at 50mA - maximizes dynamic range in low-voltage systems. |
| Shutdown Supply Current | <0.04μA per amplifier (VCC = 5V) - extends battery life in standby mode without external load switches. |
| PSRR / CMRR | 90dB PSRR, 80dB CMRR (TYP) - rejects supply noise and common-mode interference critical in shared PCB power domains. |
| THD+N | 0.003% at 10kHz, 2VP-P into 10kΩ - meets high-fidelity audio requirements for line-level buffering and DAC output stages. |
Pinout & Package
MAX4338EUB+ is housed in a 10-pin μMAX package (package code U10+2, outline 21-0061), measuring 3mm × 3mm × 0.8mm with exposed pad for thermal enhancement. Pin pitch is 0.5mm; recommended land pattern: 90-0330.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 9 | OUT1, OUT2 | Amplifier outputs - each capable of sourcing/sinking ±50mA; high-impedance during shutdown. |
| 2, 8 | IN1−, IN2− | Inverting inputs - matched to noninverting inputs; support precision feedback networks. |
| 3, 7 | IN1+, IN2+ | Noninverting inputs - rail-to-rail common-mode range enables DC-coupled sensor/buffer interfaces. |
| 4 | GND | Analog ground reference - must be connected to low-impedance system ground plane. |
| 5, 6 | SHDN1, SHDN2 | Independent shutdown controls - logic-high enables; logic-low disables amplifier and forces output high-Z. |
| 10 | VCC | Positive supply - bypass with 0.1μF ceramic + ≥1μF bulk capacitor close to pin. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-Rail Input/Output | Enables full-swing signal handling from GND to VCC across temperature, maximizing SNR in 2.7V–5.5V systems. |
| Independent Shutdown Control | Per-amplifier SHDN pins allow selective channel disabling - critical for mono/stereo power management in portable audio. |
| Thermal Overload Protection | Automatically disables amplifiers and forces high-Z output if junction temperature exceeds +140°C - prevents damage under sustained overload. |
| Smart Short-Circuit Protection | Limits output current to 110mA only outside safe operating region (e.g., VOUT > 1V while sinking), preserving full 50mA capability in normal operation. |
| High Capacitive-Load Stability | Stable with up to 200pF load - eliminates need for isolation resistors in most PCB layouts, simplifying filter design. |
Applications
| 32Ω Headphone Drivers | Portable Audio DAC Buffers |
|---|---|
Use Scenario: Driving stereo 32Ω earbuds from a 3.3V or 5V portable media player with no external DC-blocking capacitors. IC Role / Device Role / Timing Role: Dual-channel rail-to-rail output buffer delivering 2VP-P signals with <0.01% THD+N and 50mA peak current per channel. Use Value: Eliminates coupling capacitors and associated bass roll-off, enabling true DC-coupled headphone output with extended low-frequency response. |
Use Scenario: Buffering the analog output of a stereo DAC in a Bluetooth speaker or voice assistant device powered by a single-cell Li-ion battery. IC Role / Device Role / Timing Role: Low-noise, high-slew-rate (1.8V/μs) op amp providing gain-of-1 buffering with 5MHz bandwidth and 26nV/√Hz input voltage noise. Use Value: Preserves DAC resolution and dynamic range while rejecting supply ripple via 90dB PSRR - no additional LDO required. |
| Wireless PA Control Interfaces | Hands-Free Car Phone Amplifiers |
Use Scenario: Conditioning and level-shifting control signals for Class-D power amplifiers in compact wireless speakers or IoT soundbars. IC Role / Device Role / Timing Role: Precision rail-to-rail comparator-like interface with fast enable/disable (1μs tENABLE/tSHDN) and low-offset (<±3mV) operation. Use Value: Enables rapid mute/unmute of PA stages during Bluetooth reconnection or audio stream handover without pop/click artifacts. |
Use Scenario: Amplifying microphone and speaker signals in automotive hands-free kits where space, thermal budget, and EMI immunity are constrained. IC Role / Device Role / Timing Role: Dual op amp providing microphone preamp gain and speaker driver output with integrated thermal shutdown and short-circuit protection. Use Value: Reduces BOM count by combining mic biasing, signal conditioning, and speaker drive in one 3mm × 3mm package - qualified for −40°C to +85°C operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual rail-to-rail audio op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4410ETB+T | Single-channel, 8-pin μMAX, 60mA drive, 10MHz GBW, no shutdown | Lacks independent dual shutdown; higher bandwidth but higher quiescent current (2.5mA vs. 1.8mA) | Select when single-channel operation suffices and higher speed is prioritized over power savings. |
| TPA6138A2RTJR | Dual-channel, 10-pin QFN, 65mA drive, integrated click-pop suppression, no rail-to-rail input | Includes dedicated audio features (pop suppression, thermal foldback) but input range limited to VCC − 1.2V | Select for production audio subsystems requiring certified pop/click mitigation and simplified layout - not drop-in compatible. |
Compared with MAX4410ETB+T and TPA6138A2RTJR, the MAX4338EUB+ uniquely balances dual-channel independence, ultra-low shutdown current (<0.04μA), rail-to-rail input capability, and proven 32Ω headphone drive - making it optimal for space-constrained, battery-sensitive portable audio where channel-level power control is essential.
Availability
MAX4338EUB+ is available at Aetrix Electronics and suitable for portable audio DAC buffers, 32Ω headphone drivers, and hands-free car phone amplifiers requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for MAX4338EUB+ 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) designs high-performance analog and mixed-signal ICs for power, sensing, connectivity, and signal processing in demanding environments.
The MAX4335–MAX4338 family was engineered specifically for low-voltage, high-output-current audio signal conditioning - targeting portable consumer electronics where rail-to-rail operation, shutdown efficiency, and thermal robustness are critical.
FAQ
What is the maximum continuous output current per channel of the MAX4338EUB+?
The MAX4338EUB+ delivers ±50mA per channel continuously into 32Ω loads at VCC = 2.7V or 5V, as verified in the DC Electrical Characteristics table under "Output Drive" with ISOURCE/ISINK = 50mA. This rating holds across −40°C to +85°C and enables direct drive of stereo headphones without external boost circuitry. Exceeding 50mA triggers smart short-circuit protection only when (VCC − VOUT) > 1V (sourcing) or VOUT > 1V (sinking).
Does the MAX4338EUB+ support true rail-to-rail input operation?
Yes, the MAX4338EUB+ supports true rail-to-rail input operation: its input common-mode voltage range extends from GND to VCC, as confirmed in the DC Electrical Characteristics table (VCM = GND to VCC). This is achieved via a dual-input-stage architecture (NPN + PNP differential pairs) that seamlessly transitions near VCC/2, enabling DC-coupled sensor interfaces and precision reference buffering without level-shifting circuitry.
How does the shutdown functionality work on the MAX4338EUB+?
The MAX4338EUB+ features two independent shutdown pins (SHDN1 and SHDN2, Pins 5 and 6). Driving either pin low disables its respective amplifier, reducing supply current to <0.04μA per channel (VCC = 5V) and placing the output in high-impedance state. Driving SHDNx high enables operation. Logic thresholds are VIH ≥ 0.7×VCC and VIL ≤ 0.3×VCC - ensuring compatibility with standard GPIOs across the 2.7V–5.5V supply range.
What package type and footprint does the MAX4338EUB+ use?
The MAX4338EUB+ uses a 10-pin μMAX package (outline 21-0061, land pattern 90-0330), measuring 3mm × 3mm × 0.8mm with 0.5mm pitch and an exposed thermal pad. This RoHS-compliant package provides superior thermal performance versus SOT23 alternatives and is optimized for high-density portable PCBs. The "U10+2" package code confirms this configuration per Maxim's Package Information table.
Is the MAX4338EUB+ suitable for driving 100Ω loads, and what is its output voltage swing under that condition?
Yes, the MAX4338EUB+ is rated for 100Ω loads: at VCC = 5V, it guarantees output swing within 400mV of both rails (VCC − VOH ≤ 400mV, VOL ≤ 400mV) while sourcing/sinking 50mA. At VCC = 2.7V, output swing remains within 500mV of rails under same conditions. These values are specified in the "Output Voltage Swing" section of the DC Electrical Characteristics table and validated across temperature, making it suitable for line-driver and instrumentation applications beyond headphones.
MAX4338EUB+ 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:
- 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:
- 10-uMAX/uSOP
MAX4338EUB+ FAQ
1.How can I place an order for MAX4338EUB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4338EUB+ 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 MAX4338EUB+ reliable?
The price and inventory of MAX4338EUB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4338EUB+ is usually 5 days.
3.What payment methods are accepted for MAX4338EUB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4338EUB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4338EUB+?
MAX4338EUB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4338EUB+ 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 MAX4338EUB+?
For technical support, including MAX4338EUB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4338EUB+ requirements.
6.How does Aetrix verify that MAX4338EUB+ is sourced from the original manufacturer or authorized distributors?
All MAX4338EUB+ 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 MAX4338EUB+ meets industry standards.
7.What is the process for return or replacement of MAX4338EUB+?
All MAX4338EUB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4338EUB+, 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 MAX4338EUB+ part is unused and in its original packaging.
Return procedure for MAX4338EUB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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