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Analog Devices Inc./Maxim Integrated MAX4338EUB+T
- Part No.:
- MAX4338EUB+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX4338EUB+T.pdf
- Description:
- IC OPAMP GP 2 CIRC 10UMAX/USOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,924
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Product details
Overview
MAX4338EUB+T 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/mute control (SHDN1/SHDN2) reducing supply current to <0.04μA per amplifier.
For engineers reviewing the MAX4338EUB+T datasheet, MAX4338EUB+T pinout, MAX4338EUB+T application, or MAX4338EUB+T equivalent, key selection criteria include its 50mA drive into 32Ω, ultra-low shutdown current, rail-to-rail I/O swing at low voltage, thermal overload protection, and μMAX-10 package compatibility with space-constrained audio signal chains.
Technical Context
The MAX4338EUB+T integrates two independent BiCMOS op amps in a single 10-pin μMAX package, each with complementary NPN/PNP rail-to-rail input stages enabling full-supply-range common-mode operation and no phase reversal on overdrive. Its output stage supports ±50mA sourcing/sinking into resistive loads while maintaining <400mV headroom to rails at VCC = 2.7V and RL = 32Ω.
Each amplifier features dedicated SHDN pins enabling independent enable/disable control, with <1μs enable/shutdown timing and high-impedance output state during shutdown. The device achieves 90dB PSRR and 80dB CMRR over -40°C to +85°C, eliminating need for pre-regulation in battery-powered audio paths.
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 >1Vrms without external buffers. |
| Gain-Bandwidth Product | 5MHz - supports stable unity-gain operation with 32Ω loads and preserves audio fidelity up to 20kHz. |
| Shutdown Supply Current | <0.04μA per amplifier at VCC = 5V - extends battery life in always-on portable devices with intermittent audio playback. |
| Input/Output Swing | Rail-to-rail - delivers maximum dynamic range from GND to VCC, critical for low-voltage 2.7V operation. |
| PSRR | 90dB (typ) - rejects power-supply noise without requiring additional filtering in noisy DC-DC converter domains. |
| THD+N | 0.003% at 20kHz into 10kΩ - meets high-fidelity audio requirements for line-level buffering and DAC output stages. |
Pinout & Package
MAX4338EUB+T is housed in a 10-pin μMAX package (package code U10+2), measuring 3mm × 3mm × 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, 9 | IN1+, IN2+ | Noninverting inputs for Channel 1 and Channel 2 - accept full-rail common-mode signals (GND to VCC). |
| 2, 8 | IN1-, IN2- | Inverting inputs - support both inverting and noninverting configurations with matched input impedance. |
| 3, 7 | OUT1, OUT2 | Amplifier outputs - deliver ±50mA into 32Ω with rail-to-rail swing and thermal shutdown protection. |
| 4 | GND | Analog ground reference - must be connected to low-impedance system ground plane for optimal PSRR and THD. |
| 5, 6 | SHDN1, SHDN2 | Independent shutdown controls - logic-low disables respective amplifier and places output in high-Z state. |
| 10 | VCC | Positive supply input - requires local 0.1μF ceramic + ≥1μF bulk capacitance for stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Independent shutdown control | Two dedicated SHDN pins enable per-channel power gating - essential for mono/stereo mute sequencing in portable audio codecs. |
| Rail-to-rail input stage | NPN/PNP composite input allows operation with input voltages from GND to VCC - eliminates level-shifting in single-supply DAC interfaces. |
| Thermal overload protection | Auto-shutdown at TJ > +140°C and auto-recovery below +120°C - prevents latch-up during sustained 50mA output into low-Z loads. |
| Smart short-circuit protection | Limits output current to 110mA only when VOUT > 1V (sink) or VCC–VOUT > 1V (source) - preserves full 50mA drive capability under normal load conditions. |
| Capacitive-load stability | Stable with up to 200pF load - simplifies PCB layout for headphone jack ESD protection networks without added isolation resistors. |
Applications
| 32Ω Headphone Drivers | Portable Audio DAC Buffers |
|---|---|
|
Use Scenario: Driving stereo 32Ω earbuds from a low-voltage SoC audio subsystem with shared 3.3V or 2.7V rail. IC Role / Device Role / Timing Role: Dual-channel line driver providing rail-to-rail output swing and 50mA peak current per channel to maintain SNR >100dB. Use Value: Eliminates need for discrete buffer transistors or higher-voltage charge pumps, reducing BOM count and PCB area by 40% vs. legacy solutions. |
Use Scenario: Buffering stereo DAC outputs in Bluetooth headphones where space and battery life are constrained. IC Role / Device Role / Timing Role: Low-noise, low-THD voltage follower isolating DAC core from variable headphone impedance. Use Value: 0.003% THD+N at 20kHz ensures transparent audio reproduction; <0.04μA shutdown current extends playback time by >8 hours per charge cycle. |
| Wireless PA Control Interfaces | Hands-Free Car Phone Amplifiers |
|
Use Scenario: Conditioning analog control signals for Class D speaker amplifiers in compact wireless speakers. IC Role / Device Role / Timing Role: Precision gain-setting amplifier with 5MHz GBW ensuring fast settling (<2μs) for dynamic volume control loops. Use Value: 95dB large-signal voltage gain and 70° phase margin guarantee stable closed-loop response across temperature and supply variation. |
Use Scenario: Full-duplex audio path in automotive hands-free modules interfacing microphone and speaker with infotainment MCU. IC Role / Device Role / Timing Role: Dual op amp performing microphone preamp (Channel 1) and speaker driver (Channel 2) functions. Use Value: Independent SHDN1/SHDN2 pins allow simultaneous mute of mic and speaker during call handover, preventing echo and pop artifacts. |
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 |
|---|---|---|---|
| MAX4410ETE+T | Dual, 50mA drive, but only 2.2MHz GBW and no shutdown function; 16-pin TQFN package. | Lacks independent shutdown and has lower bandwidth - unsuitable for high-fidelity 20kHz audio or power-gated designs. | Select when shutdown is unnecessary and PCB area permits larger TQFN; avoid for battery-sensitive portable audio. |
| OPA2350UA/2K5 | Dual, rail-to-rail I/O, 38mA drive, 38MHz GBW, no integrated shutdown; SO-8 package. | Higher bandwidth but lower output current and no SHDN pins - requires external logic for mute control. | Choose for wideband signal conditioning where 50mA drive is not required; not drop-in for MAX4338EUB+T headphone roles. |
Compared with MAX4410ETE+T and OPA2350UA/2K5, the MAX4338EUB+T uniquely combines 50mA drive, 5MHz bandwidth, independent dual shutdown, and μMAX-10 footprint - making it the only option meeting all four requirements for space-constrained, battery-optimized stereo headphone drivers.
Availability
MAX4338EUB+T is available at Aetrix Electronics and suitable for portable audio systems, battery-powered instrumentation, and automotive hands-free modules requiring stable component supply with guaranteed long-term manufacturability.
Supply support for MAX4338EUB+T 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 precision analog and mixed-signal ICs for power, interface, sensing, and timing applications in industrial, automotive, and consumer markets.
The MAX4335–MAX4338 family was engineered specifically for low-voltage, high-current audio signal conditioning - delivering rail-to-rail performance, thermal robustness, and ultra-low-power shutdown in miniature packages for portable electronics.
FAQ
What is the maximum output current capability of the MAX4338EUB+T per channel?
The MAX4338EUB+T delivers ±50mA of continuous output current per channel into 32Ω loads at VCC = 2.7V and VCC = 5V, as confirmed in the DC Electrical Characteristics table under "Output Drive" with test conditions ISOURCE/ISINK = 50mA. This rating is maintained across the full operating temperature range (-40°C to +85°C) and enables direct drive of stereo headphones without external buffers.
Does the MAX4338EUB+T support true rail-to-rail input and output operation?
Yes, the MAX4338EUB+T features true rail-to-rail input and output stages. Its input common-mode voltage range spans GND to VCC, and its output swing reaches within 100mV of both rails under light load (10kΩ) and within 500mV under full 32Ω load at VCC = 2.7V - verified in the "Output Voltage Swing" section of the datasheet's DC Electrical Characteristics.
How does the shutdown functionality work on the MAX4338EUB+T?
The MAX4338EUB+T provides two independent shutdown pins (SHDN1 and SHDN2). Driving either pin low disables its corresponding amplifier, reduces quiescent current to <0.04μA per channel (at VCC = 5V), and places the output in high-impedance state. Enable time from shutdown is 1μs, and power-up time is 5μs - all specified in the AC Electrical Characteristics table.
What package type is used for the MAX4338EUB+T and what are its key mechanical features?
The MAX4338EUB+T uses a 10-pin μMAX package (outline 21-0061, land pattern 90-0330), measuring 3mm × 3mm × 0.8mm with an exposed thermal pad. It is RoHS-compliant (indicated by "+" suffix) and designed for fine-pitch surface-mount assembly. The package supports thermal dissipation up to 444mW at +70°C with 5.6mW/°C derating above that temperature.
Is the MAX4338EUB+T suitable for driving capacitive loads such as ESD-protected headphone jacks?
Yes, the MAX4338EUB+T is stable with capacitive loads up to 200pF, as explicitly stated in the AC Electrical Characteristics table under "Capacitive-Load Stability". This makes it compatible with typical ESD protection networks at headphone connectors without requiring series isolation resistors - simplifying layout and preserving transient response.
MAX4338EUB+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- 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+T FAQ
1.How can I place an order for MAX4338EUB+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4338EUB+T 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+T reliable?
The price and inventory of MAX4338EUB+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4338EUB+T is usually 5 days.
3.What payment methods are accepted for MAX4338EUB+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4338EUB+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4338EUB+T?
MAX4338EUB+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4338EUB+T 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+T?
For technical support, including MAX4338EUB+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4338EUB+T requirements.
6.How does Aetrix verify that MAX4338EUB+T is sourced from the original manufacturer or authorized distributors?
All MAX4338EUB+T 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+T meets industry standards.
7.What is the process for return or replacement of MAX4338EUB+T?
All MAX4338EUB+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4338EUB+T, 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+T part is unused and in its original packaging.
Return procedure for MAX4338EUB+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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