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Analog Devices Inc./Maxim Integrated MAX4335EXT
- Part No.:
- MAX4335EXT
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
MAX4335EXT.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,348
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Product details
Overview
MAX4335EXT from Maxim Integrated is a single-channel rail-to-rail input/output operational amplifier optimized for 32Ω headphone driver applications in portable, battery-powered systems. It delivers 50mA output current, features 5MHz gain-bandwidth product, operates from 2.7V to 5.5V single supply, and achieves 0.003% THD at 20kHz into 10kΩ - enabling high-fidelity audio amplification with minimal distortion.
For engineers reviewing the MAX4335EXT datasheet, MAX4335EXT pinout, MAX4335EXT application, or MAX4335EXT equivalent, this page provides verified circuit role (single-channel headphone driver op amp), package mapping (6-pin SC70), shutdown behavior (no SHDN pin), rail-to-rail I/O compliance, and thermal protection - all critical for low-voltage audio signal chain design and BOM validation.
Technical Context
The MAX4335EXT uses a BiCMOS process with dual NPN/PNP input stage enabling rail-to-rail common-mode input range extending 0.25V beyond supply rails. Its output stage delivers ±50mA into 32Ω while maintaining <400mV headroom from VCC and GND at 2.7V supply.
It lacks integrated shutdown functionality (SHDN pin absent per SC70-6 pinout), distinguishing it from the MAX4336EXT. The device includes thermal overload protection (trips at +140°C) and smart short-circuit protection activating only above 110mA and |VOUT − rail| > 1V - preserving full drive capability under typical loads.
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 Current | ±50mA into 32Ω - sufficient to deliver 40mW per channel to standard headphones at low supply voltage. |
| Gain-Bandwidth Product | 5MHz - supports stable unity-gain operation up to ~100kHz, suitable for full-audio-band buffering and driving. |
| THD + Noise | 0.003% at 20kHz into 10kΩ - ensures high-fidelity audio reproduction with negligible harmonic artifacts. |
| PSRR | 90dB - eliminates need for dedicated LDO pre-regulation in most portable audio designs. |
| Input/Output Swing | Rail-to-rail - maximizes dynamic range across full supply range, critical for low-voltage signal integrity. |
| Quiescent Current | 1.2mA per amplifier at 2.7V - balances performance and battery life in always-on audio paths. |
Pinout & Package
MAX4335EXT is housed in a 6-pin SC70 package (JEDEC MO-203AA), footprint-compatible with SOT-323 but smaller (1.25mm × 0.85mm × 0.55mm height). This ultra-compact package supports high-density portable PCB layouts.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | IN+ | Noninverting input - accepts full rail-to-rail common-mode voltage (GND to VCC); polarity-sensitive for noninverting configurations. |
| 2 | GND | Analog ground reference - must be low-impedance connection to system AGND plane to maintain PSRR and THD performance. |
| 3 | IN− | Inverting input - used in inverting amplifier or transimpedance configurations; matched impedance required to minimize offset error. |
| 4 | OUT | Amplified output - capable of sourcing/sinking 50mA into 32Ω; rail-to-rail swing enables maximum signal headroom. |
| 5 | SHDN (N.C.) | No internal connection - pin is unconnected; not usable for shutdown control (distinguishes MAX4335EXT from MAX4336EXT). |
| 6 | VCC | Positive supply - requires local 0.1µF ceramic + ≥1µF bulk bypassing to suppress supply noise and ensure stability. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Enables full dynamic range utilization from 2.7V supply - critical for maximizing SNR in low-voltage portable audio. |
| 50mA output drive | Directly drives 32Ω headphones without external buffer stages - reduces component count and board area. |
| 90dB PSRR | Rejects battery and digital supply noise without requiring separate analog LDO - simplifies power architecture. |
| No phase reversal on overdrive | Prevents catastrophic latch-up during input overvoltage - enhances robustness in real-world portable interfaces. |
| Thermal overload protection | Automatically disables output at +140°C junction temperature - prevents permanent damage during sustained high-power operation. |
Applications
| 32Ω Headphone Drivers | Portable/Battery-Powered Instruments |
|---|---|
Use Scenario: Driving stereo earbuds or mono headset in handheld medical monitors, barcode scanners, or industrial handhelds. IC Role / Device Role / Timing Role: Single-channel audio line driver providing low-distortion, rail-to-rail buffered output to 32Ω load. Use Value: Delivers 40mW/channel at 2.7V with 0.003% THD - meets consumer-grade audio fidelity requirements without external boost circuitry. |
Use Scenario: Signal conditioning and DAC buffering in portable multimeters, gas detectors, or handheld oscilloscopes. IC Role / Device Role / Timing Role: Precision unity-gain buffer isolating sensitive ADC inputs from noisy digital sections. Use Value: 90dB PSRR and rail-to-rail swing preserve measurement accuracy across full battery discharge range (2.7–5.5V). |
| Wireless PA Control | DAC/ADC Buffers |
Use Scenario: Audio path conditioning in Bluetooth speaker modules or Wi-Fi-enabled voice assistants. IC Role / Device Role / Timing Role: Post-DAC amplifier stage delivering clean, high-current signal to Class D amplifier input or analog volume control. Use Value: 5MHz GBW ensures flat frequency response up to 20kHz; low 1.2mA quiescent current extends battery runtime. |
Use Scenario: Output buffer for audio DACs (e.g., MAX5532) or input driver for precision ADCs in portable data loggers. IC Role / Device Role / Timing Role: Low-noise, low-offset voltage follower minimizing code-dependent errors in 16-bit+ conversion. Use Value: ±0.6mV max input offset and 5pF input capacitance prevent settling errors and maintain effective resolution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar single-channel rail-to-rail audio op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4336EXT-T | Includes active-low SHDN pin; same SC70-6 package and electrical specs except shutdown mode (ICC(SHDN) < 0.04µA). | Required where system-level power gating or mute sequencing is needed - e.g., Bluetooth audio handshaking. | Select MAX4336EXT-T only if hardware-controlled shutdown is mandatory; MAX4335EXT avoids SHDN routing complexity and leakage risk. |
| TLC2271CDR | Lower output drive (25mA), higher quiescent current (1.3mA), no thermal protection; SOIC-8 package (larger footprint). | Suitable for line-out or high-Z loads (≥10kΩ), not 32Ω headphones - limited by output current and thermal margin. | Choose TLC2271CDR only for cost-sensitive, non-headphone applications where 50mA drive and thermal safety are unnecessary. |
Compared with MAX4336EXT-T, MAX4335EXT trades shutdown control for simplified layout and elimination of SHDN-related leakage paths; compared with TLC2271CDR, it delivers double the output current, superior PSRR, and integrated thermal protection - making it uniquely suited for compact, battery-powered headphone driver designs.
Availability
MAX4335EXT is available at Aetrix Electronics and suitable for portable audio systems, battery-powered instrumentation, and wireless peripheral audio interfaces requiring stable component supply, RoHS-compliant packaging, and guaranteed -40°C to +85°C operation.
Supply support for MAX4335EXT 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, mixed-signal, and power management ICs for demanding industrial, automotive, and portable applications.
The MAX4335–MAX4338 family was engineered specifically for high-output-current, low-voltage audio driver applications - prioritizing rail-to-rail swing, 50mA drive, and PSRR performance in ultra-small SC70/SOT23 packages.
FAQ
Does MAX4335EXT support shutdown/mute functionality?
No, MAX4335EXT does not include shutdown functionality. Pin 5 is labeled "SHDN (N.C.)" in the datasheet, confirming it is not internally connected. For shutdown capability, use MAX4336EXT-T, which implements an active-low SHDN pin with <0.04µA supply current in shutdown mode. MAX4335EXT remains always-on when powered.
What is the maximum capacitive load the MAX4335EXT can drive stably?
The MAX4335EXT is stable with capacitive loads up to 200pF without external compensation. Beyond this, oscillation may occur unless an isolation resistor (e.g., 39Ω) is added in series with the output. This specification is validated per the manufacturer's Typical Operating Characteristics graphs and applies across the full 2.7V–5.5V supply range and -40°C to +85°C temperature range.
Can MAX4335EXT drive a 16Ω headphone load?
Yes, MAX4335EXT can drive 16Ω loads, but output voltage swing and thermal limits must be observed. At 2.7V supply, the output is guaranteed within 400mV of rails into 32Ω; into 16Ω, peak current increases, raising power dissipation. Derate ambient temperature or add thermal relief if operating continuously at full output into 16Ω to avoid triggering thermal shutdown at +140°C junction temperature.
What is the input bias current behavior near the supply rails?
MAX4335EXT uses complementary NPN/PNP input pairs, causing input bias current polarity reversal near VCC/2. At VCM = GND, IB ≈ +100nA; at VCM = VCC, IB ≈ –100nA. To minimize offset, match source impedances at IN+ and IN− (e.g., using equal resistors in noninverting gain networks), as specified in the Applications Information section of the MAX4335EXT datasheet.
Is MAX4335EXT pin-compatible with other op amps in the SC70-6 package?
MAX4335EXT follows standard SC70-6 pinout (IN+, GND, IN−, OUT, NC, VCC) and is mechanically compatible with other SC70-6 op amps. However, electrical compatibility is not guaranteed - for example, many SC70-6 op amps lack 50mA drive or rail-to-rail output swing. Always verify gain-bandwidth, output current, and PSRR before substitution; MAX4335EXT is purpose-built for headphone drive, not general-purpose use.
MAX4335EXT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- 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
- 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:
- SC-70-6
MAX4335EXT FAQ
1.How can I place an order for MAX4335EXT through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4335EXT 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 MAX4335EXT reliable?
The price and inventory of MAX4335EXT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4335EXT is usually 5 days.
3.What payment methods are accepted for MAX4335EXT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4335EXT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4335EXT?
MAX4335EXT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4335EXT 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 MAX4335EXT?
For technical support, including MAX4335EXT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4335EXT requirements.
6.How does Aetrix verify that MAX4335EXT is sourced from the original manufacturer or authorized distributors?
All MAX4335EXT 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 MAX4335EXT meets industry standards.
7.What is the process for return or replacement of MAX4335EXT?
All MAX4335EXT units undergo pre-shipment inspection (PSI). If there is an issue with MAX4335EXT, 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 MAX4335EXT part is unused and in its original packaging.
Return procedure for MAX4335EXT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX4335EXT Tags
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