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Analog Devices Inc./Maxim Integrated MAX4234ASD
- Part No.:
- MAX4234ASD
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4234ASD.pdf
- Description:
- IC CMOS 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,678
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Product details
Overview
The MAX4234ASD 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 headset loads and serves as RF power amplifier bias control in wireless handsets.
For engineers reviewing the MAX4234ASD datasheet, MAX4234ASD pinout, MAX4234ASD application, or MAX4234ASD equivalent, key selection criteria include guaranteed rail-to-rail I/O swing under 32Ω load, shutdown capability per channel (not applicable to MAX4234ASD), capacitive-load stability up to 780pF, and SO-14 package thermal performance at +125°C ambient.
Technical Context
The MAX4234ASD implements parallel n-channel and p-channel differential input stages enabling true rail-to-rail common-mode input range (VSS to VDD). Its output stage delivers millivolt-level headroom to both rails-guaranteed ≤500mV from VDD and ≤500mV from VSS with 32Ω load at 2.7V supply.
It features unity-gain stability with capacitive loads up to 780pF and exhibits no phase reversal when overdriven. The device lacks integrated shutdown functionality (confirmed by Selector Guide and Pin Configurations: MAX4234 has no SHDN pin in SO-14 package), distinguishing it from MAX4231/MAX4233 variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 5.5V single supply - enables direct integration into 3.3V and 5V portable systems without level-shifting. |
| Gain-Bandwidth Product | 10MHz - supports stable closed-loop gain ≥10 at audio frequencies up to 1MHz. |
| Slew Rate | 10V/μs - ensures <1% THD+N for 2VP-P signals at 10kHz into 32Ω load. |
| Output Drive Current | 200mA peak - drives 32Ω headphones at 60mW/channel with minimal distortion. |
| Input Offset Voltage | ±8mV max - maintains DC accuracy in precision buffer and sensor signal conditioning paths. |
| PSRR / CMRR | 70dB min PSRR, 46dB min CMRR - suppresses supply noise and common-mode interference in noisy battery-powered environments. |
| Capacitive Load Stability | Stable with ≤780pF - eliminates need for external isolation resistors in DAC output buffering applications. |
Pinout & Package
MAX4234ASD is housed in a 14-pin SO (Small Outline) package (package code S14+1), with exposed pad option not specified. Thermal derating is 11.9mW/°C above +70°C, supporting continuous operation at +125°C ambient when power dissipation remains within 952.4mW limit.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT4 | Amplifier 4 output - drives load directly; rail-to-rail swing supports single-supply headphone output stage. |
| 2 | IN4− | Inverting input of Amp 4 - used in inverting configurations or feedback networks. |
| 3 | IN4+ | Noninverting input of Amp 4 - accepts full rail-to-rail common-mode input (VSS to VDD). |
| 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 0.1μF ceramic bypass capacitor near pin. |
| 6 | IN1+ | Noninverting input of Amp 1 - identical electrical behavior to IN4+, supports DC-coupled sensor interfaces. |
| 7 | IN1− | Inverting input of Amp 1 - matched to IN4−; enables precision differential amplification. |
| 8 | OUT1 | Amplifier 1 output - independent channel; no shared resources with other amplifiers in quad configuration. |
| 9 | OUT2 | Amplifier 2 output - electrically isolated; supports stereo line driver or dual-channel sensor conditioning. |
| 10 | IN2− | Inverting input of Amp 2 - low input bias current (1pA typ) preserves high-impedance source integrity. |
| 11 | IN2+ | Noninverting input of Amp 2 - rail-to-rail capable; suitable for direct connection to resistive divider references. |
| 12 | VSS | Second VSS pin - reduces ground impedance; must be connected to same ground plane as Pin 4. |
| 13 | IN3+ | Noninverting input of Amp 3 - identical specs to other inputs; enables four independent analog channels. |
| 14 | IN3− | Inverting input of Amp 3 - matched pair with IN3+; supports fully differential front-end designs. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Operates with input common-mode range from VSS to VDD and output swing within 500mV of both rails into 32Ω - enables true single-supply 3.3V/5V audio and sensor signal chains. |
| High-output current drive | 200mA peak sourcing/sinking - drives low-impedance loads (32Ω headphones, RF PA bias networks) without external buffers. |
| No phase reversal on overdrive | Prevents latch-up or uncontrolled output transitions when input exceeds supply rails - critical for robustness in transient-prone handset environments. |
| Unity-gain stable with capacitive loads | Stable up to 780pF - allows direct connection to ADC inputs, long cables, or piezoelectric sensors without compensation networks. |
| Low quiescent current | 1.1mA per amplifier at 2.7V - extends battery life in always-on portable audio and monitoring systems. |
Applications
| Portable Headphone Driver | RF Power Amplifier Bias Control |
|---|---|
Use Scenario: Driving stereo 32Ω earbuds from a 5V microcontroller-based audio subsystem in a Bluetooth headset. IC Role / Device Role / Timing Role: Quad op-amp configured as two independent noninverting buffers (Amp1/Amp2) and two inverting drivers (Amp3/Amp4) delivering 60mW/channel with <1% THD+N at 1kHz. Use Value: Eliminates need for discrete output coupling capacitors and external boost circuitry while maintaining DC-coupled signal path integrity. | Use Scenario: Providing precise, temperature-stable bias voltage to GaAs RF power amplifiers in GSM/UMTS handset front-ends. IC Role / Device Role / Timing Role: Single amplifier (e.g., Amp1) acts as precision voltage-controlled current source, converting DAC output to regulated PA collector bias. Use Value: Rail-to-rail output swing ensures full utilization of 2.7V–5.5V supply range, maximizing PA efficiency across battery discharge profile. |
| DAC Output Buffering | Transformer / Line Driver |
Use Scenario: Buffering 16-bit audio DAC outputs in a tablet computer's audio codec subsystem. IC Role / Device Role / Timing Role: Quad configuration isolates four DAC channels (left/right analog, mic bias, headphone detect) with matched gain and phase response. Use Value: 10MHz GBWP and 10V/μs slew rate preserve transient fidelity of high-resolution audio waveforms without slew-induced distortion. | Use Scenario: Driving balanced analog video lines (e.g., CVBS or component Y/Pb/Pr) in automotive infotainment head units. IC Role / Device Role / Timing Role: Two amplifiers (Amp1/Amp2) form differential driver pair; remaining two provide sync pulse conditioning and DC restoration. Use Value: 200mA drive capability sustains signal integrity over 75Ω coaxial cable lengths up to 15m without termination loss or reflection artifacts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4234AUD | TSSOP-14 package (vs. SO-14); identical electrical specs and pinout; 10mW/°C thermal derating vs. 11.9mW/°C for SO. | Better suited for space-constrained PCB layouts where footprint area is prioritized over thermal mass. | Select MAX4234AUD for high-density routing; choose MAX4234ASD when board-level thermal management favors SO package's higher power dissipation margin. |
| OPA4340UA | Single-supply rail-to-rail I/O quad op-amp; 5.5MHz GBWP, 6V/μs slew rate, 150mA output drive; SO-14 package. | Limited bandwidth and drive current reduce suitability for RF PA biasing and high-fidelity 32Ω headphone drive. | Choose OPA4340UA only for cost-sensitive, lower-performance audio line driving where 10MHz GBWP is unnecessary. |
Compared with MAX4234AUD and OPA4340UA, the MAX4234ASD provides superior thermal performance in SO-14 packaging and higher bandwidth/drive capability essential for RF bias and premium audio, while maintaining pin compatibility with the TSSOP variant.
Availability
MAX4234ASD is available at Aetrix Electronics and suitable for portable audio systems, RF front-end biasing circuits, and industrial DAC buffering applications requiring stable component supply across extended temperature ranges (-40°C to +125°C).
Supply support for MAX4234ASD 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 engineered specifically for high-output-drive, rail-to-rail operation in battery-powered portable electronics - emphasizing low-voltage operation, audio-grade linearity, and robust RF bias control.
FAQ
Does the MAX4234ASD include a shutdown feature?
No, the MAX4234ASD does not include a shutdown feature. Per the Selector Guide and Pin Configurations section of the datasheet, only MAX4231 and MAX4233 variants offer SHDN functionality. The MAX4234ASD is a quad op-amp in SO-14 packaging with no dedicated shutdown pin - all four amplifiers operate continuously when powered. This distinguishes it from pin-compatible MAX4234 variants like MAX4234AUD/V+T which also lack shutdown in TSSOP format.
What is the maximum capacitive load the MAX4234ASD can drive stably?
According to the AC Electrical Characteristics table and Applications Information section, the MAX4234ASD is unity-gain stable with capacitive loads up to 780pF. This specification is verified across temperature and supply voltage ranges and applies to all four amplifiers in the MAX4234ASD. Exceeding 780pF may cause ringing or oscillation unless compensated with an isolation resistor (RISO) in series with the output.
Can the MAX4234ASD drive a 32Ω headset load effectively?
Yes, the MAX4234ASD is explicitly optimized for 32Ω headset drive. The General Description states it "can drive typical headset levels (32Ω)" and the Typical Operating Characteristics confirm 60mW/channel output at 1% THD+N from a 5V supply. Output voltage swing is guaranteed within 500mV of both rails into 32Ω, enabling full-swing audio performance without coupling capacitors in single-supply configurations.
What is the operating temperature range of the MAX4234ASD?
The MAX4234ASD is rated for operation from -40°C to +125°C, as confirmed in the Ordering Information table and Absolute Maximum Ratings section. This extended temperature range supports deployment in automotive infotainment systems, industrial handheld test equipment, and outdoor portable electronics where ambient conditions exceed commercial-grade limits.
Is the MAX4234ASD pin-compatible with other packages in the MAX4230–MAX4234 family?
The MAX4234ASD (SO-14) shares identical pin functions with the MAX4234AUD (TSSOP-14) per the Pin/Bump Configurations diagram, making them functionally and pin-compatible. However, it is not pin-compatible with UCSP, μMAX, or SC70 variants due to differing pin counts and layouts. Always verify land pattern dimensions and thermal vias when substituting packages, as SO-14 and TSSOP-14 have different footprints despite matching pin assignments.
MAX4234ASD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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 FAQ
1.How can I place an order for MAX4234ASD through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4234ASD 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 reliable?
The price and inventory of MAX4234ASD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4234ASD is usually 5 days.
3.What payment methods are accepted for MAX4234ASD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4234ASD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4234ASD?
MAX4234ASD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4234ASD 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?
For technical support, including MAX4234ASD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4234ASD requirements.
6.How does Aetrix verify that MAX4234ASD is sourced from the original manufacturer or authorized distributors?
All MAX4234ASD 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 meets industry standards.
7.What is the process for return or replacement of MAX4234ASD?
All MAX4234ASD units undergo pre-shipment inspection (PSI). If there is an issue with MAX4234ASD, 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 part is unused and in its original packaging.
Return procedure for MAX4234ASD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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