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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:1,171
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Product details
Overview
The 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, features 5MHz gain-bandwidth product, operates from 2.7V to 5.5V, and includes independent shutdown/mute control (SHDN1/SHDN2) reducing supply current to <0.04μA per amplifier - enabling battery-sensitive audio front-ends.
For engineers reviewing the MAX4338EUB-T datasheet, MAX4338EUB-T pinout, MAX4338EUB-T application, or MAX4338EUB-T equivalent, key selection criteria include its guaranteed 50mA drive into 32Ω, ultra-low shutdown current, rail-to-rail I/O swing at low supply voltage, high PSRR (90dB), and thermal overload protection - all in a 10-pin μMAX package rated for -40°C to +85°C.
Technical Context
The MAX4338EUB-T integrates two independent BiCMOS op amps with complementary NPN/PNP rail-to-rail input stages, enabling full common-mode range (GND to VCC) and eliminating phase reversal during overdrive. Its output stage supports ±50mA sourcing/sinking while maintaining <400mV headroom to rails under 32Ω load at 2.7V.
Each amplifier features dedicated SHDN pins enabling independent enable/disable control, with fast 1μs shutdown/enable timing and high-impedance output state in shutdown. The device achieves 90dB PSRR and 80dB CMRR across temperature, minimizing sensitivity to supply noise and common-mode disturbances in compact audio signal 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 pre-regulation. |
| Output Drive Capability | 50mA per channel into 32Ω - sufficient to drive stereo headphones at >1Vrms with low distortion. |
| Gain-Bandwidth Product | 5MHz - supports stable unity-gain buffer operation and wideband audio signal conditioning up to ~280kHz full-power bandwidth. |
| Shutdown Supply Current | <0.04μA per amplifier at VCC = 5V - extends battery life in always-on portable devices with intermittent audio playback. |
| Power-Supply Rejection Ratio | 90dB (typ) - suppresses ripple and noise from noisy DC-DC converters, eliminating need for LDO pre-regulation in most audio designs. |
| Rail-to-Rail I/O Swing | VOL ≤ 500mV, VOH ≥ VCC – 500mV at 32Ω load - maximizes dynamic range and SNR in low-voltage, single-supply headphone amplifiers. |
| Total Harmonic Distortion + Noise | 0.003% at 10kHz, 2VP-P, RL = 10kΩ - meets high-fidelity audio requirements for portable media players and voice interfaces. |
Pinout & Package
Package: 10-pin μMAX (U10+2), 3mm × 3mm, 0.5mm pitch, exposed pad for thermal enhancement. Pin 1 marked by dot; top-side marking "-" (no laser mark).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Positive supply input - bypass with 0.1μF ceramic + ≥1μF bulk capacitor close to pin for stability and PSRR performance. |
| 2 | OUT1 | Amplifier 1 output - capable of sourcing/sinking 50mA; high-impedance in shutdown when SHDN1 = GND. |
| 3 | IN1− | Inverting input of Amp1 - differential input resistance 500kΩ (|VIN−−VIN+| < 1.2V); protected by 1kΩ series resistors and back-to-back diodes. |
| 4 | IN1+ | Noninverting input of Amp1 - rail-to-rail common-mode range (GND to VCC); bias current polarity switches near VCC/2. |
| 5 | GND | Analog ground reference - connect directly to low-impedance PCB ground plane; shared return for both amplifiers. |
| 6 | IN2+ | Noninverting input of Amp2 - electrically identical to IN1+; matched layout recommended for stereo channel tracking. |
| 7 | IN2− | Inverting input of Amp2 - identical specs to IN1−; use symmetric external feedback networks for balanced THD performance. |
| 8 | OUT2 | Amplifier 2 output - independent of OUT1; same drive capability and shutdown behavior as OUT1. |
| 9 | SHDN2 | Shutdown control for Amp2 - logic high (≥0.7×VCC) enables; logic low (≤0.3×VCC) disables Amp2 and places OUT2 in high-Z. |
| 10 | SHDN1 | Shutdown control for Amp1 - fully independent of SHDN2; allows asymmetric power management (e.g., mute left only). |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-Rail Input/Output | Enables full-swing signal handling from GND to VCC at both inputs and outputs - critical for maximizing SNR in 2.7V–3.3V portable audio systems. |
| Independent Dual Shutdown | SHDN1/SHDN2 pins allow per-channel enable/disable - supports mono playback, voice prompt muting, or power sequencing without affecting second channel. |
| 50mA Output Drive into 32Ω | Guaranteed minimum current delivery ensures robust headphone driving capability even at lowest operating voltage (2.7V), avoiding clipping. |
| 90dB Power-Supply Rejection | Reduces sensitivity to switching regulator noise - eliminates need for dedicated LDOs in space-constrained portable designs. |
| Thermal Overload Protection | Automatically disables amplifiers and forces high-Z outputs when junction temperature exceeds +140°C - prevents permanent damage during sustained high-power operation. |
| No Phase Reversal on Overdrive | Input stage maintains correct polarity even when inputs exceed supply rails - avoids catastrophic latch-up or transient spikes in feedback-coupled circuits. |
Applications
| 32Ω Headphone Drivers | Portable/Battery-Powered Instruments |
|---|---|
Use Scenario: Driving stereo earbuds or headphones directly from a DAC output in smartphones, tablets, or wearables. IC Role / Device Role / Timing Role: Low-noise, high-current buffer amplifier delivering clean analog audio signals to transducers. Use Value: Delivers >1Vrms into 32Ω loads at 2.7V supply with THD+N <0.003%, extending battery life via ultra-low shutdown current. |
Use Scenario: Signal conditioning and output buffering in handheld test equipment, medical sensors, or portable data loggers. IC Role / Device Role / Timing Role: Precision voltage follower and gain stage for sensor interface or analog output circuitry. Use Value: Rail-to-rail I/O and 5MHz GBWP support wide dynamic range and fast settling (2μs to 0.01%) for accurate measurement capture. |
| Hands-Free Car Phones | Transformer/Line Drivers |
Use Scenario: Audio amplification for speakerphone modules in automotive infotainment systems with strict EMI and thermal constraints. IC Role / Device Role / Timing Role: High PSRR (90dB) headphone/speaker driver isolating audio path from noisy vehicle electrical environment. Use Value: Maintains voice clarity under engine cranking (low VCC dips) and rejects alternator ripple without additional filtering components. |
Use Scenario: Driving balanced/unbalanced line-level signals to external audio codecs, ADCs, or legacy analog interfaces. IC Role / Device Role / Timing Role: Low-output-impedance voltage buffer with high slew rate (1.8V/μs) and capacitive-load stability (up to 200pF). Use Value: Ensures signal integrity over long traces or cables; eliminates ringing and overshoot without external isolation resistors. |
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, 10MHz GBWP, 2.5V–5.5V supply, but no shutdown function; 16-pin TQFN package. | Lacks independent shutdown control; higher bandwidth suits wider-bandwidth signal chains but increases power consumption (2.5mA vs. 1.8mA quiescent). | Select when higher speed is required and shutdown is managed externally; not suitable for ultra-low-power standby modes. |
| TPA6138A2RTJR | Dual, 55mA drive, integrated pop/click suppression, 2.5V–5.5V, but fixed 2V/V gain; 16-pin QFN; no rail-to-rail inputs. | Optimized specifically for headphone output with built-in de-pop logic; input common-mode range limited to VCC/2 ±1.2V. | Choose for turnkey headphone solutions where pop suppression and fixed gain simplify design; avoid when variable gain or full-rail input is needed. |
Compared with MAX4338EUB-T, MAX4410ETE+T offers higher bandwidth but no shutdown, increasing idle power; TPA6138A2RTJR provides integrated de-pop but sacrifices rail-to-rail input flexibility and programmable gain - making MAX4338EUB-T optimal for low-quiescent, flexible, precision audio buffering in constrained layouts.
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, RoHS-compliant packaging, and guaranteed -40°C to +85°C operation.
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 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 buffering - prioritizing rail-to-rail operation, ultra-low shutdown current, and robust 32Ω drive capability in miniature packages.
FAQ
What is the maximum output current capability of the MAX4338EUB-T per channel?
The MAX4338EUB-T guarantees 50mA of continuous output current per channel into a 32Ω load at both 2.7V and 5.5V supply voltages. This is confirmed in the DC Electrical Characteristics table under "Output Drive" with test conditions specifying ISOURCE/ISINK = 50mA and corresponding VOH/VOL limits. Short-circuit protection activates at 110mA, allowing safe transient peaks beyond the 50mA rating.
Does the MAX4338EUB-T support true rail-to-rail input and output operation?
Yes, the MAX4338EUB-T supports rail-to-rail input common-mode voltage range (GND to VCC) and rail-to-rail output voltage swing. The datasheet explicitly states "Rail-to-Rail® Inputs and Outputs" in Features and confirms output swing within 500mV of both rails under 32Ω load at 2.7V. Input stage uses complementary NPN/PNP pairs to achieve full-rail coverage without phase reversal.
How does the shutdown functionality work on the MAX4338EUB-T?
The MAX4338EUB-T has two independent shutdown pins: SHDN1 controls Amplifier 1, and SHDN2 controls Amplifier 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 amplifiers remain fully functional when their respective SHDN pins are high (≥0.7×VCC). Enable/disable timing is 1μs.
What is the gain-bandwidth product and typical slew rate of the MAX4338EUB-T?
The MAX4338EUB-T has a gain-bandwidth product of 5MHz (typical) and a slew rate of 1.8V/μs (typical), both specified under standard conditions (VCC = +2.7V, AVCL = 1V/V, CL = 15pF). These values are measured and guaranteed across temperature and supply voltage, supporting stable unity-gain operation and fast transient response in audio and instrumentation applications.
Is thermal overload protection included in the MAX4338EUB-T?
Yes, the MAX4338EUB-T includes integrated thermal overload protection. When the junction temperature exceeds +140°C, the device automatically reduces supply current to 120μA per amplifier and places both outputs in high-impedance state. Normal operation resumes once the junction temperature falls below +120°C. This feature is documented in the Applications Information section and verified across process corners.
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:
- 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:
- 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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