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Analog Devices Inc./Maxim Integrated MAX4231AYT+
- Part No.:
- MAX4231AYT+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 6-UFLGA
- Datasheet:
-
MAX4231AYT+.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 6UTLGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,267
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Product details
Overview
The MAX4231AYT+ from Maxim Integrated is a single, rail-to-rail input/output CMOS operational amplifier with integrated shutdown control, optimized for high-current output drive (200mA peak) and RF power amplifier biasing in wireless handsets. It operates from a single 2.7V to 5.5V supply, delivers 10MHz gain-bandwidth product and 10V/μs slew rate, and features active-low shutdown that drives the output to VSS - enabling full RF PA disablement in portable audio systems.
For engineers reviewing the MAX4231AYT+ datasheet, MAX4231AYT+ pinout, MAX4231AYT+ application, or MAX4231AYT+ equivalent, key selection criteria include its 6-pin thin µDFN (ultra-thin LGA) package, shutdown-enabled low-power operation (<1µA), rail-to-rail I/O swing into 32Ω loads, and verified stability with capacitive loads up to 780pF.
Technical Context
This op amp employs parallel n- and p-channel differential input stages to achieve true rail-to-rail common-mode input range (VSS to VDD), with each stage active across complementary voltage bands. Its output stage supports sourcing/sinking up to 200mA at 5V while maintaining millivolt-level headroom to both rails under 32Ω load.
The shutdown function (SHDN pin) actively pulls the output to VSS when asserted low, ensuring zero RF leakage during PA disablement. Enable time is 6µs and shutdown time is 1µs, supporting fast power cycling in battery-sensitive applications without compromising signal integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.7V to 5.5V single supply - enables direct integration into 3.3V/5V portable systems without level-shifting. |
| Gain-Bandwidth Product | 10MHz - supports stable unity-gain buffering of audio signals up to ~1MHz with margin. |
| Slew Rate | 10V/μs - ensures <1µs settling for 2V step inputs, critical for transient response in headset drivers. |
| Output Drive | 200mA peak - directly drives 32Ω headphones at 60mW/channel or biases RF PAs without external buffers. |
| Shutdown Current | <1µA at 2.7V - extends battery life in always-on mobile accessories with periodic wake/sleep cycles. |
| Capacitive Load Stability | 780pF - eliminates need for isolation resistors in DAC output buffering or filter interface applications. |
| Input Offset Voltage | ±6mV max - maintains DC accuracy in precision biasing circuits for RF amplifier quiescent current control. |
Pinout & Package
The MAX4231AYT+ is housed in a 6-pin thin µDFN (ultra-thin LGA) package measuring 1.5mm × 1.0mm with exposed pad, optimized for space-constrained portable PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | IN+ | Noninverting input - accepts rail-to-rail common-mode signals (VSS to VDD) for single-supply sensor/buffer interfaces. |
| 2 | IN− | Inverting input - used in closed-loop configurations; input capacitance (8pF) requires careful layout to avoid instability. |
| 3 | VSS | Negative supply - must be connected to ground in single-supply operation; serves as reference for shutdown output state. |
| 4 | OUT | Amplifier output - capable of rail-to-rail swing (≤500mV from rails into 32Ω) and 200mA peak current delivery. |
| 5 | VDD | Positive supply - bypassed with 0.1µF ceramic capacitor near pin to suppress high-frequency supply noise. |
| 6 | SHDN | Active-low shutdown control - logic threshold VIH = 0.57×VDD; drives output to VSS when low, preventing RF antenna leakage. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O with 200mA drive | Enables direct 32Ω headphone driving and RF PA biasing without external transistors or charge pumps. |
| Active-low shutdown with VSS output | Guarantees RF PA cutoff by pulling output to ground - eliminates risk of unconverted signal radiation during sleep mode. |
| 780pF capacitive-load stability | Supports direct connection to DAC outputs or LC filters without series isolation resistors or compensation networks. |
| 10V/μs slew rate + 10MHz GBWP | Delivers clean 20kHz audio with <0.0005% THD+N at 10kHz and preserves transient fidelity in burst-mode PA control. |
| 1.1mA quiescent current per amplifier | Reduces system-level power budget in multi-channel portable audio subsystems while maintaining performance. |
Applications
| RF PA Bias Control | Portable Headphone Driver |
|---|---|
Use Scenario: Biasing Class-AB RF power amplifiers in GSM/UMTS/WCDMA handsets during transmit bursts. IC Role / Device Role / Timing Role: Precision DC current source controlling PA quiescent point; shutdown pin synchronizes with baseband processor's TX enable signal. Use Value: Prevents RF leakage during idle periods via active VSS output clamp, meeting 3GPP spurious emission limits. | Use Scenario: Driving 32Ω stereo earpieces from a single 5V supply in Bluetooth headsets or voice assistants. IC Role / Device Role / Timing Role: Single-supply, rail-to-rail output buffer delivering 60mW/channel with <1% THD at 1kHz. Use Value: Eliminates coupling capacitors and DC-blocking networks, reducing BOM count and PCB area by >30%. |
| DAC Output Buffer | Audio Hands-Free Car Kit |
Use Scenario: Buffering audio DAC outputs in automotive infotainment systems where EMI immunity and low distortion are critical. IC Role / Device Role / Timing Role: Low-noise (15nV/√Hz), high-PSRR (85dB) voltage follower isolating DAC from variable speaker impedance. Use Value: Maintains SNR >95dB across temperature while rejecting alternator ripple and digital switching noise. | Use Scenario: Amplifying microphone and speaker signals in compact car-mounted hands-free kits powered from 12V DC-DC converted to 3.3V. IC Role / Device Role / Timing Role: Dual-role amplifier: mic preamp (gain = 100V/V) and speaker driver (32Ω load, 100mW peak). Use Value: Single-chip solution reduces thermal footprint and enables AEC-Q100-compliant designs using /V variants. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-output-drive op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX44260ETA+ | Lower output drive (150mA), higher quiescent current (1.8mA), same 6-pin TDFN package. | Limited to 40mW into 32Ω; less suitable for RF PA bias requiring full 200mA headroom. | Select when lower cost and adequate drive for mid-tier audio suffice; verify thermal derating at 125°C. |
| OPA356AIDBVR | Higher GBWP (200MHz), lower output drive (60mA), SOT23-6 package, no shutdown function. | Unsuitable for RF PA bias or 32Ω loads; better for high-speed signal conditioning with light loads. | Choose only for bandwidth-critical, low-current applications where shutdown and high drive are unnecessary. |
Compared with MAX4231AYT+, MAX44260ETA+ trades peak output current for slightly lower cost and similar form factor, while OPA356AIDBVR offers vastly higher speed but cannot drive demanding loads - making MAX4231AYT+ uniquely balanced for portable RF/audio hybrid systems.
Availability
The MAX4231AYT+ is available at Aetrix Electronics and suitable for RF power amplifier biasing, portable headphone driver circuits, and DAC output buffering requiring stable component supply across industrial temperature ranges (-40°C to +125°C).
Supply support for MAX4231AYT+ 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, sensing, connectivity, and signal processing in portable, industrial, and automotive systems.
The MAX4230–MAX4234 family was engineered specifically for high-current, rail-to-rail op amp roles in space- and power-constrained wireless audio and RF front-end subsystems - emphasizing shutdown safety, load drive capability, and small-footprint packaging.
FAQ
What is the maximum continuous output current specification for the MAX4231AYT+?
The MAX4231AYT+ delivers up to 200mA peak output current at VDD = 5V, with guaranteed performance into 32Ω loads. Continuous DC output current is limited by package power dissipation - for the thin µDFN package, maximum continuous dissipation is 170.2mW at +70°C ambient, corresponding to ~70mA into 32Ω at 5V with typical thermal conditions. Always verify junction temperature in final layout.
Does the MAX4231AYT+ require external compensation when driving a 100nF capacitive load?
No - the MAX4231AYT+ is unity-gain stable with capacitive loads up to 780pF. A 100nF (100,000pF) load far exceeds this limit and will cause oscillation. To drive such loads, add a series isolation resistor (RISO) between the MAX4231AYT+ output and the capacitor; typical values range from 10Ω to 39Ω depending on load resistance and required phase margin.
What is the output voltage behavior of the MAX4231AYT+ during shutdown mode?
When SHDN is pulled low, the MAX4231AYT+ output is actively driven to VSS (ground), not placed in high-impedance state. Measured VOUT(SHDN) is ≤150mV into 200Ω load at TA = +25°C. This ensures RF power amplifiers are fully disabled with no leakage path - a critical safety feature absent in op amps with tri-state shutdown.
Can the MAX4231AYT+ operate from a 2.5V supply?
No - the absolute minimum operating supply voltage for the MAX4231AYT+ is 2.7V, as specified in the Absolute Maximum Ratings and confirmed across all DC/AC electrical characteristics tables. Operation below 2.7V risks undefined behavior, reduced output swing, and failure to meet slew rate or GBWP specifications. For 2.5V systems, consider the MAX4238 or similar 1.8V–5.5V rail-to-rail op amps.
Is the MAX4231AYT+ pin-compatible with other members of the MAX4230–MAX4234 family?
No - the MAX4231AYT+ uses a 6-pin thin µDFN package with unique pinout (IN+, IN−, VSS, OUT, VDD, SHDN). It is not pin-compatible with the 5-pin SC70 MAX4230AXK+, 6-pin SC70 MAX4231AXT+, or UCSP variants. Pin mapping differs across packages even within the same functional variant; always consult the Pin/Bump Configurations section of the datasheet before board reuse.
MAX4231AYT+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-UFLGA
- Packaging:
- Strip
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 10V/µs
- Gain Bandwidth Product:
- 10 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 50 pA
- Voltage - Input Offset:
- 850 µV
- Current - Supply:
- 1.2mA
- Current - Output / Channel:
- 200 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-UTLGA (1.5x1.0)
MAX4231AYT+ FAQ
1.How can I place an order for MAX4231AYT+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4231AYT+ 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 MAX4231AYT+ reliable?
The price and inventory of MAX4231AYT+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4231AYT+ is usually 5 days.
3.What payment methods are accepted for MAX4231AYT+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4231AYT+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4231AYT+?
MAX4231AYT+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4231AYT+ 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 MAX4231AYT+?
For technical support, including MAX4231AYT+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4231AYT+ requirements.
6.How does Aetrix verify that MAX4231AYT+ is sourced from the original manufacturer or authorized distributors?
All MAX4231AYT+ 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 MAX4231AYT+ meets industry standards.
7.What is the process for return or replacement of MAX4231AYT+?
All MAX4231AYT+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4231AYT+, 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 MAX4231AYT+ part is unused and in its original packaging.
Return procedure for MAX4231AYT+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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