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Analog Devices Inc./Maxim Integrated MAX4234ASD+T
- Part No.:
- MAX4234ASD+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4234ASD+T.pdf
- Description:
- IC CMOS 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,147
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Product details
Overview
MAX4234ASD+T from Maxim Integrated is a quad, rail-to-rail input/output CMOS operational amplifier optimized for high-current output drive (200mA peak), 10MHz gain-bandwidth product, and 10V/μs slew rate, operating from a single 2.7V to 5.5V supply. It delivers full-swing audio drive into 32Ω headsets and provides precise RF power amplifier biasing in wireless handset applications.
For engineers reviewing the MAX4234ASD+T datasheet, MAX4234ASD+T pinout, MAX4234ASD+T application, or MAX4234ASD+T equivalent, this page provides verified package mapping (14-pin SO), confirmed quad-channel architecture, shutdown-inactive topology, rail-to-rail I/O performance at 2.7V/5V, and real-world load-driving capability into 32Ω and 200Ω loads - all critical for portable audio and RF bias design validation.
Technical Context
The MAX4234ASD+T implements parallel n- and p-channel differential input stages enabling true rail-to-rail common-mode input range (VSS to VDD) and an output stage capable of sourcing/sinking ≥200mA while maintaining millivolt-level swing margins (≤500mV from rails at 32Ω). Its unity-gain stability extends to 780pF capacitive loads without external compensation.
This quad op amp lacks integrated shutdown logic (SHDN pins are unconnected per pin configuration); it is designed for continuous-operation systems requiring four independent high-output-drive amplifiers - such as stereo headphone drivers with dual left/right channels plus auxiliary signal conditioning paths in compact handheld devices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 5.5V single supply - enables direct integration with Li-ion battery-powered systems without level-shifting. |
| Gain-Bandwidth Product | 10MHz - supports stable closed-loop operation up to ~1MHz at gain = 10, suitable for audio pre-amplification and RF bias control loops. |
| Slew Rate | 10V/μs - ensures <5µs settling for 2V step inputs, critical for transient response in headset driver and PA enable/disable timing. |
| Output Drive Current | 200mA peak (VDD = 5V) - drives 32Ω headphones to >60mW/channel and biases RF PAs with low-impedance control voltage accuracy. |
| Rail-to-Rail I/O | VCM = VSS to VDD; VOUT swing ≤500mV from rails at 32Ω - maximizes dynamic range in single-supply audio and bias circuits. |
| Input Offset Voltage | ±8mV max (–40°C to +125°C) - maintains DC accuracy in precision bias networks where offset-induced PA quiescent current drift must be minimized. |
| Quiescent Current | 2.8mA per amplifier (VDD = 5.5V) - total 11.2mA for all four channels, compatible with low-power portable system budgeting. |
Pinout & Package
MAX4234ASD+T is housed in a 14-pin SO (Small Outline) package (package code S14+1), RoHS-compliant, with exposed pad not present. Pin functions are defined per the official Maxim pin configuration diagram for MAX4234 in SO format.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT4 | Amplifier 4 output - fully rail-to-rail, capable of 200mA sink/source into 32Ω loads. |
| 2 | IN4– | Inverting input of amplifier 4 - high-impedance (1000MΩ), low-bias (1pA), supports precision feedback networks. |
| 3 | IN4+ | Noninverting input of amplifier 4 - rail-to-rail common-mode range enables direct connection to biased audio or control signals. |
| 4 | VSS | Negative supply - connect to ground in single-supply operation; reference for all outputs and inputs. |
| 5 | VDD | Positive supply - accepts 2.7V–5.5V; requires local 0.1µF ceramic bypass capacitor for stability. |
| 6 | IN1+ | Noninverting input of amplifier 1 - identical electrical characteristics to IN4+, supports matched channel operation. |
| 7 | IN1– | Inverting input of amplifier 1 - symmetrical with IN4–; enables identical gain-setting resistor networks across all four channels. |
| 8 | OUT1 | Amplifier 1 output - independently configurable; no internal coupling between channels. |
| 9 | OUT2 | Amplifier 2 output - electrically isolated; supports dual stereo or multi-path signal routing. |
| 10 | IN2– | Inverting input of amplifier 2 - shares same DC specs and AC performance as other inputs. |
| 11 | IN2+ | Noninverting input of amplifier 2 - enables consistent common-mode handling across all four amplifiers. |
| 12 | OUT3 | Amplifier 3 output - rated for same 200mA drive and rail-to-rail swing as OUT1/OUT2/OUT4. |
| 13 | IN3– | Inverting input of amplifier 3 - matches input capacitance (8pF) and bias current (1pA) of other inputs. |
| 14 | IN3+ | Noninverting input of amplifier 3 - completes full quad-channel set; no SHDN functionality present on this variant. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full utilization of 2.7V–5.5V supply range in single-supply systems - eliminates need for virtual ground or level-shifting circuitry. |
| 200mA peak output drive | Drives 32Ω headphones to 60mW/channel and delivers stable bias voltage to RF PAs under varying load conditions. |
| Unity-gain stable to 780pF | Eliminates need for external compensation when driving capacitive loads like cables, filters, or ADC input networks. |
| 10MHz GBWP & 10V/μs SR | Supports wideband audio amplification (20Hz–20kHz) with <0.0005% THD+N and fast transient response for PA enable/disable control. |
| No phase reversal on overdrive | Prevents latch-up or unintended system behavior when input exceeds supply rails - critical for robustness in noisy handset environments. |
| Low input bias current (1pA) | Maintains accuracy in high-impedance sensor interfaces or precision bias networks where leakage would cause significant error. |
Applications
| RF PA Biasing Control | Portable Headphone Driver |
|---|---|
|
Use Scenario: Biasing RF power amplifiers in GSM/UMTS/LTE handsets to maintain linearity and efficiency across temperature and battery voltage variation. IC Role / Device Role / Timing Role: Quad op amp provides four independent, low-drift, rail-to-rail control voltages - two for main PA and two for diversity/receive-path amplifiers. Use Value: 200mA drive ensures stable bias under dynamic load transients; ±8mV VOS guarantees <1% quiescent current error across –40°C to +125°C. |
Use Scenario: Delivering 60mW/channel into 32Ω stereo headphones from a single 5V supply in smartphones and portable media players. IC Role / Device Role / Timing Role: Two channels operate as noninverting headphone drivers; remaining two provide DC bias generation and signal conditioning for ancillary audio paths. Use Value: Rail-to-rail output swing maximizes voltage headroom; 10V/μs slew rate prevents slew-induced distortion at 20kHz full-scale signals. |
| Digital-to-Analog Converter Buffer | Transformer / Line Driver |
|
Use Scenario: Buffering DAC outputs in portable instrumentation and audio codecs where low noise, high linearity, and drive capability are required. IC Role / Device Role / Timing Role: Single channel buffers DAC output; others condition reference voltages or generate complementary signals for differential signaling. Use Value: 15nV/√Hz input voltage noise and 0.0005% THD+N preserve signal fidelity; 10MHz bandwidth accommodates oversampled DAC reconstruction filters. |
Use Scenario: Driving balanced audio lines or RF transformers in compact baseband interface modules for wireless infrastructure edge devices. IC Role / Device Role / Timing Role: Configured as high-current differential driver (two channels) with matched gain and phase; remaining channels handle common-mode feedback. Use Value: 200mA output current sustains transformer magnetization without saturation; rail-to-rail swing ensures full differential amplitude swing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad high-output-drive op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4234AUD/V+T | AEC-Q100 qualified for automotive use; otherwise identical electrical specs and 14-pin TSSOP package. | Required for automotive infotainment, telematics, or ADAS subsystems needing extended temperature and reliability validation. | Select MAX4234AUD/V+T only when AEC-Q100 compliance is mandated; MAX4234ASD+T is preferred for industrial/portable consumer designs. |
| LMV344IDR | Quad rail-to-rail op amp with 1mA/quiescent current, 1MHz GBWP, and 120mA output drive - lower bandwidth and drive than MAX4234ASD+T. | Suitable for cost-sensitive, low-bandwidth applications like sensor signal conditioning or basic audio line driving where 200mA is unnecessary. | Choose LMV344IDR only if 10MHz GBWP and 200mA drive are not required; MAX4234ASD+T remains optimal for RF bias and high-fidelity headphone drive. |
Compared with MAX4234AUD/V+T, the MAX4234ASD+T offers identical performance in a standard SO package but lacks automotive qualification; versus LMV344IDR, it delivers 10× higher bandwidth and 1.7× greater output current - essential for demanding RF and audio applications where signal integrity and drive strength are non-negotiable.
Availability
MAX4234ASD+T is available at Aetrix Electronics and suitable for RF power amplifier biasing, portable headphone driver circuits, and digital-to-analog converter buffering requiring stable component supply across industrial, medical, and consumer electronics programs.
Supply support for MAX4234ASD+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX4230–MAX4234 family was designed specifically for portable wireless systems requiring high-output-drive, rail-to-rail op amps capable of directly driving 32Ω headsets and biasing RF power amplifiers from a single low-voltage supply.
FAQ
What is the operating supply voltage range for the MAX4234ASD+T?
The MAX4234ASD+T operates from a single 2.7V to 5.5V supply or dual ±1.35V to ±2.5V supplies. At 2.7V, it maintains full rail-to-rail input/output swing and 200mA output drive capability - making it ideal for Li-ion battery-powered devices where voltage drops below 3V during discharge.
Does the MAX4234ASD+T include a shutdown feature?
No, the MAX4234ASD+T does not include shutdown functionality. Per the official pin configuration for the 14-pin SO package, SHDN pins are absent - unlike the MAX4231/MAX4233 variants. All four amplifiers operate continuously when powered; external enable/disable must be implemented via power sequencing or signal gating.
What is the maximum capacitive load the MAX4234ASD+T can drive stably?
The MAX4234ASD+T is unity-gain stable with capacitive loads up to 780pF without external compensation. This specification is verified across temperature and supply voltage ranges and applies to all four channels independently - enabling direct interfacing with ADC input filters, cable-driven lines, or RF matching networks.
Can the MAX4234ASD+T drive a 32Ω headset load effectively?
Yes, the MAX4234ASD+T is explicitly characterized for 32Ω headset drive: at VDD = 5V, it delivers ≥200mA peak current and achieves ≥60mW per channel with <1% THD+N. Its rail-to-rail output swing ensures full dynamic range, and its 10V/μs slew rate prevents slew-induced distortion at full-scale 20kHz audio signals.
What package type is used for the MAX4234ASD+T?
The MAX4234ASD+T uses a 14-pin SO (Small Outline) package (S14+1), RoHS-compliant, with no exposed thermal pad. It measures 8.65mm × 3.91mm × 1.75mm and is compatible with standard SO-14 footprint layouts and reflow soldering profiles per JEDEC J-STD-020.
MAX4234ASD+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 10V/µs
- Gain Bandwidth Product:
- 10 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 850 µV
- Current - Supply:
- 1.2mA (x4 Channels)
- 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:
- 14-SOIC
MAX4234ASD+T FAQ
1.How can I place an order for MAX4234ASD+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4234ASD+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 MAX4234ASD+T reliable?
The price and inventory of MAX4234ASD+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4234ASD+T is usually 5 days.
3.What payment methods are accepted for MAX4234ASD+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4234ASD+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4234ASD+T?
MAX4234ASD+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4234ASD+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 MAX4234ASD+T?
For technical support, including MAX4234ASD+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4234ASD+T requirements.
6.How does Aetrix verify that MAX4234ASD+T is sourced from the original manufacturer or authorized distributors?
All MAX4234ASD+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 MAX4234ASD+T meets industry standards.
7.What is the process for return or replacement of MAX4234ASD+T?
All MAX4234ASD+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4234ASD+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 MAX4234ASD+T part is unused and in its original packaging.
Return procedure for MAX4234ASD+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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