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Analog Devices Inc./Maxim Integrated MAX4231AXT-T
- Part No.:
- MAX4231AXT-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
MAX4231AXT-T.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,736
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Product details
Overview
The MAX4231AXT-T from Maxim Integrated is a single, rail-to-rail input/output CMOS operational amplifier with shutdown control, housed in a 6-pin SC70 package. It delivers 200mA peak output current, features 10MHz gain-bandwidth product and 10V/μs slew rate, and operates from a single 2.7V to 5.5V supply. It is engineered for RF power amplifier biasing and high-current audio driver applications in wireless handsets and portable headsets.
For engineers reviewing the MAX4231AXT-T datasheet, MAX4231AXT-T pinout, MAX4231AXT-T application, or MAX4231AXT-T equivalent, key selection criteria include its 200mA drive capability into 32Ω loads, shutdown-induced low-impedance output (10Ω), <1μA shutdown current, rail-to-rail I/O swing, and guaranteed stability with up to 780pF capacitive loads.
Technical Context
The MAX4231AXT-T employs parallel n-channel and p-channel differential input stages to achieve true rail-to-rail common-mode input range (VSS to VDD). Its output stage supports rail-to-rail swing - delivering ≤500mV drop from VDD and ≤500mV above VSS at 32Ω load - while maintaining unity-gain stability with capacitive loads up to 780pF.
Shutdown functionality is implemented via a dedicated SHDN pin that actively drives the output to VSS when asserted low, ensuring full RF PA disablement. The amplifier exits shutdown in 6μs and powers up fully within 5μs, with quiescent current tightly specified at 1.1mA per amplifier at 2.7V and <1μA in shutdown mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 5.5V single supply - enables direct integration into battery-powered 3.3V/5V systems without level-shifting. |
| Output Drive Current | 200mA peak - sufficient to directly bias RF PAs or drive 32Ω headphones at >60mW/channel. |
| Gain-Bandwidth Product | 10MHz - supports stable closed-loop operation up to ~1MHz at moderate gains (e.g., AV = 10). |
| Slew Rate | 10V/μs - ensures faithful reproduction of fast audio transients and RF control signals without distortion. |
| Input Offset Voltage | ±6mV max - maintains DC accuracy in precision biasing and sensor interface circuits. |
| Shutdown Current | <1μA at 2.7V - extends battery life in intermittent-use portable devices such as Bluetooth headsets. |
| Capacitive Load Stability | Stable with up to 780pF - eliminates need for external isolation resistors in most DAC buffer and line-driver configurations. |
Pinout & Package
The MAX4231AXT-T is packaged in a 6-pin SC70 (2.1mm × 2.0mm) surface-mount package with exposed pad option not applicable. Pin functions are validated per Maxim's official pin configuration diagram for the 6-pin SC70 variant.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | IN+ | Noninverting input - accepts rail-to-rail common-mode voltage (VSS to VDD); high-impedance (1000MΩ) node. |
| 2 | IN− | Inverting input - forms feedback node; matched to IN+ for low offset and drift. |
| 3 | VSS | Negative supply - must be connected to ground in single-supply operation; reference for output swing and shutdown state. |
| 4 | OUT | Amplifier output - rail-to-rail capable; sinks/sourced 200mA; driven low during SHDN assertion. |
| 5 | VDD | Positive supply - supplies all internal circuitry; bypassing with 0.1μF ceramic capacitor required for stability. |
| 6 | SHDN | Shutdown control - active-low logic input; pulls output to VSS and reduces IDD to <1μA when low. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full dynamic range utilization in low-voltage (2.7V) single-supply systems without clipping. |
| 200mA peak output drive | Eliminates need for external driver stages in headset and RF PA bias circuits. |
| Active-low shutdown with output pull-down | Ensures RF PA is fully disabled and prevents leakage radiation by forcing OUT to VSS. |
| Unity-gain stable with 780pF load | Supports direct connection to DAC outputs, ADC references, and long PCB traces without compensation. |
| 10V/μs slew rate + 10MHz GBWP | Preserves signal integrity in wideband audio and fast-settling control loops (e.g., envelope tracking). |
Applications
| RF PA Biasing in Wireless Handsets | Portable Headphone Driver (32Ω) |
|---|---|
Use Scenario: Precise DC bias control of GaAs or SiGe RF power amplifiers in GSM/UMTS/LTE handset front-ends. IC Role / Device Role / Timing Role: High-current, low-noise op amp configured as a precision current source or voltage-controlled bias generator. Use Value: 200mA drive and rail-to-rail swing ensure full PA activation across battery voltage range (3.0–4.2V); shutdown disables PA during sleep modes. | Use Scenario: Single-supply stereo headphone driver delivering >60mW per channel into 32Ω loads from 5V rails. IC Role / Device Role / Timing Role: Output buffer and level shifter, eliminating coupling capacitors via rail-to-rail swing and DC-coupled architecture. Use Value: 10V/μs slew rate and THD+N of 0.0005% at 10kHz preserve audio fidelity; 1.1mA quiescent current extends playback time. |
| Audio Hands-Free Car Kits | DAC Output Buffer |
Use Scenario: Driving speaker-level audio signals in compact automotive hands-free modules with limited board space. IC Role / Device Role / Timing Role: Line driver with integrated shutdown for mute-on-call and low-power standby. Use Value: SC70 footprint minimizes PCB area; shutdown current <1μA meets automotive microsleep requirements. | Use Scenario: Buffering high-resolution DAC outputs (e.g., audio or instrumentation) before transmission to analog subsystems. IC Role / Device Role / Timing Role: Low-noise, high-slew-rate voltage follower isolating DAC from load capacitance and noise. Use Value: 15nV/√Hz input voltage noise and 780pF capacitive-load tolerance prevent settling errors and oscillation in precision systems. |
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 |
|---|---|---|---|
| OPA2377AIDBVR | Lower output drive (60mA), no shutdown, 5.5MHz GBWP, SOT23-5 package | Not suitable for RF PA bias or 32Ω headphone drive; limited to low-current signal conditioning | Select only if drive requirement ≤60mA and shutdown is unnecessary |
| ADA4891-1ARJZ-R7 | 110mA output drive, no shutdown, 225MHz GBWP, 6-lead SOT23 package | Higher bandwidth but lower current; unsuitable for sustained 200mA loads or PA disablement | Prefer for video or high-speed signal paths where current demand is <110mA |
Compared with OPA2377AIDBVR and ADA4891-1ARJZ-R7, the MAX4231AXT-T uniquely combines 200mA drive, active shutdown with output pull-down, and rail-to-rail I/O in a 6-pin SC70 - making it the only viable choice for battery-powered RF bias and high-fidelity portable audio where both current and power-state control are mandatory.
Availability
The MAX4231AXT-T is available at Aetrix Electronics and suitable for RF power amplifier biasing, portable headphone drivers, and automotive hands-free audio systems requiring stable component supply and RoHS-compliant packaging.
Supply support for MAX4231AXT-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, mixed-signal, and power-management ICs for demanding industrial, communications, and consumer applications.
The MAX4230–MAX4234 family was developed specifically for high-current, low-voltage portable audio and RF front-end biasing - prioritizing drive strength, shutdown safety, and small-footprint integration in space-constrained handheld devices.
FAQ
What is the maximum continuous output current specification for the MAX4231AXT-T?
The MAX4231AXT-T is rated for 200mA peak output current. Under continuous DC conditions into a 32Ω load at VDD = 5V, it delivers ≥30mA with guaranteed output swing (≤320mV drop from rails). Sustained 200mA requires thermal derating and proper PCB layout per Maxim's package power dissipation guidelines - the MAX4231AXT-T's 6-pin SC70 has a 245mW limit at +70°C ambient.
Does the MAX4231AXT-T support true rail-to-rail input and output operation?
Yes, the MAX4231AXT-T supports true rail-to-rail input (common-mode range from VSS to VDD) and rail-to-rail output (swing within 500mV of VSS and VDD at 32Ω load). This is achieved via parallel n- and p-channel input stages and a complementary output stage - enabling full utilization of supply voltage in single-supply 2.7V–5.5V systems.
How does the shutdown feature of the MAX4231AXT-T behave electrically?
When the SHDN pin is pulled low, the MAX4231AXT-T reduces supply current to <1μA (at 2.7V), disables internal circuitry, and actively drives the OUT pin to VSS (≤150mV typical at RL = 200Ω). This ensures complete RF PA disablement and prevents antenna leakage - unlike high-impedance shutdown modes found in other op amps.
Can the MAX4231AXT-T drive a 32Ω headset load with low distortion?
Yes, the MAX4231AXT-T delivers THD+N of 0.0005% at 10kHz with 2VP-P output into 32Ω, and supports >60mW per channel from a 5V supply. Its 10V/μs slew rate and 10MHz GBWP prevent slew-induced distortion, while rail-to-rail output eliminates coupling capacitors - preserving bass response and DC accuracy in portable audio designs.
What is the capacitive load stability limit for the MAX4231AXT-T?
The MAX4231AXT-T is unity-gain stable with capacitive loads up to 780pF, as verified in the datasheet's AC Electrical Characteristics and Typical Operating Characteristics sections. This allows direct interfacing with DAC outputs, long PCB traces, and LCD bias networks without external compensation or isolation resistors.
MAX4231AXT-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- SC-70-6
MAX4231AXT-T FAQ
1.How can I place an order for MAX4231AXT-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4231AXT-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 MAX4231AXT-T reliable?
The price and inventory of MAX4231AXT-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4231AXT-T is usually 5 days.
3.What payment methods are accepted for MAX4231AXT-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4231AXT-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4231AXT-T?
MAX4231AXT-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4231AXT-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 MAX4231AXT-T?
For technical support, including MAX4231AXT-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4231AXT-T requirements.
6.How does Aetrix verify that MAX4231AXT-T is sourced from the original manufacturer or authorized distributors?
All MAX4231AXT-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 MAX4231AXT-T meets industry standards.
7.What is the process for return or replacement of MAX4231AXT-T?
All MAX4231AXT-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4231AXT-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 MAX4231AXT-T part is unused and in its original packaging.
Return procedure for MAX4231AXT-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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