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Analog Devices Inc./Maxim Integrated MAX4233AUB
- Part No.:
- MAX4233AUB
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX4233AUB.pdf
- Description:
- IC CMOS 2 CIRCUIT 10UMAX/USOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,317
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Product details
Overview
MAX4233AUB from Maxim Integrated is a dual, rail-to-rail input/output CMOS operational amplifier with integrated shutdown control, delivering 200mA peak output current per channel, 10MHz gain-bandwidth product, and 10V/μs slew rate from a single 2.7V to 5.5V supply. It is specifically designed for RF power amplifier biasing and high-current audio driver applications in wireless handsets and portable headsets.
For engineers reviewing the MAX4233AUB datasheet, MAX4233AUB pinout, MAX4233AUB application, or MAX4233AUB equivalent, key selection criteria include dual-channel shutdown independence, 10-bump μMAX® package footprint (3mm × 3mm), rail-to-rail operation under 32Ω load, and verified capacitive-load stability up to 780pF without external compensation.
Technical Context
The MAX4233AUB implements parallel n- and p-channel differential input stages enabling true rail-to-rail common-mode input range (VSS to VDD) and an output swing within 500mV of both rails into 32Ω. Its unity-gain stable architecture supports capacitive loads up to 780pF while maintaining ≥70° phase margin.
Each amplifier features independent SHDN1/SHDN2 logic inputs that actively drive outputs to VSS (<68mV typical) when asserted low, reducing quiescent current to <1μA per channel. Shutdown exit delay is 6μs, and power-up settling time is 5μs - critical for fast PA enable/disable sequencing in handset transmit/receive switching.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 10MHz - enables stable closed-loop gain ≥10 at 1MHz for RF bias filtering and audio pre-driver stages. |
| Slew Rate | 10V/μs - supports clean 2VP-P audio signal delivery at 10kHz with <0.0005% THD+N into 32Ω. |
| Output Drive Current | 200mA peak per channel - sufficient to bias Class-AB RF PAs and drive stereo 32Ω headphones at 60mW/channel. |
| Rail-to-Rail I/O | VCM = VSS to VDD; VOUT = VSS + 360mV / VDD − 400mV (RL = 32Ω) - eliminates need for level-shifting in single-supply headset interfaces. |
| Shutdown Current | 0.5μA per amplifier (VDD = 2.7V) - extends battery life during idle periods in portable voice-call circuits. |
| Capacitive Load Stability | Stable up to 780pF - allows direct connection to ADC input caps or RF matching networks without isolation resistors. |
| Input Offset Voltage | ±6mV max - ensures accurate DC bias point setting for RF PA quiescent current control. |
Pinout & Package
MAX4233AUB is housed in a 10-pin μMAX® package (3.0mm × 3.0mm × 0.8mm, exposed pad), pin-compatible with industry-standard 10-pin μMAX footprints (land pattern 90-0330). The package supports high thermal dissipation (derate 5.6mW/°C above +70°C) and RoHS compliance.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | IN2− | Inverting input of amplifier 2 - referenced to VSS for differential feedback in bridge-tied load configurations. |
| 2 | IN2+ | Noninverting input of amplifier 2 - accepts single-ended or differential bias voltage for dual RF PA control. |
| 3 | VSS | Negative supply - must be connected to ground in single-supply systems; serves as return path for 200mA output sink current. |
| 4 | OUT2 | Amplifier 2 output - drives RF PA gate or headphone left channel; capable of sourcing/sinking 200mA continuously. |
| 5 | VDD | Positive supply - accepts 2.7V–5.5V; requires 0.1μF ceramic bypass capacitor placed ≤2mm from pin. |
| 6 | OUT1 | Amplifier 1 output - independently drives second RF PA or right-channel audio load; shares no internal coupling with OUT2. |
| 7 | IN1− | Inverting input of amplifier 1 - used for inverting gain configuration or current-sense feedback in PA bias loops. |
| 8 | IN1+ | Noninverting input of amplifier 1 - primary DC bias reference node; offset voltage directly impacts PA quiescent current accuracy. |
| 9 | SHDN1 | Shutdown control for amplifier 1 - logic-high (>VDD × 0.57) enables operation; logic-low (<0.8V) forces OUT1 to VSS and cuts IDD to <1μA. |
| 10 | SHDN2 | Shutdown control for amplifier 2 - fully independent of SHDN1; enables asymmetric enable/disable for TDD/FDD PA sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent shutdown | SHDN1/SHDN2 pins allow per-amplifier enable/disable - essential for time-division duplex (TDD) RF PA control without cross-talk. |
| Rail-to-rail input stage | Parallel NMOS/PMOS input pairs accept VCM from VSS to VDD - eliminates external level shifters in single-supply 3.3V/5V bias circuits. |
| High-current output stage | 200mA peak per channel sustains 60mW into 32Ω at 1% THD+N - meets Bluetooth headset audio performance requirements. |
| Capacitive-load tolerance | Stable with 780pF loads - permits direct interface to RF matching networks and ADC sample-hold capacitors without added RISO. |
| Low input bias current | 1pA typical IB - preserves accuracy of high-impedance bias networks (e.g., >1MΩ DAC output filters). |
Applications
| RF PA Bias Control | Portable Headphone Driver |
|---|---|
Use Scenario: Biasing Class-A/B RF power amplifiers in GSM/WCDMA/LTE handset front-ends during transmit bursts. IC Role / Device Role / Timing Role: Precision DC voltage source controlling PA quiescent current; responds to baseband DAC output with <5μs power-up settling. Use Value: Independent SHDN1/SHDN2 enables precise TDD timing alignment; rail-to-rail output ensures full VDD utilization for maximum PA efficiency. | Use Scenario: Driving left/right channels of 32Ω stereo headsets from single 3.3V or 5V supply in smartphones and tablets. IC Role / Device Role / Timing Role: High-current buffer between audio codec DAC and headset jack; delivers 2VP-P signals with <0.0005% THD+N at 10kHz. Use Value: 200mA output capability enables 60mW/channel at 1% distortion; rail-to-rail swing maximizes dynamic range without AC-coupling capacitors. |
| Wireless Handset Audio | Digital-to-Analog Converter Buffer |
Use Scenario: Amplifying mono audio for hands-free car kits and Bluetooth speakerphones requiring low-noise, high-SR output. IC Role / Device Role / Timing Role: Single-supply headphone driver with active low-impedance output; handles 20Hz–20kHz bandwidth with 10V/μs slew rate. Use Value: 15nV/√Hz input voltage noise and 10MHz GBWP preserve wideband audio fidelity; shutdown mode reduces standby current to <1μA. | Use Scenario: Buffering low-impedance DAC outputs (e.g., audio codecs, precision instrumentation DACs) driving reactive or capacitive loads. IC Role / Device Role / Timing Role: Unity-gain stable voltage follower isolating DAC from load capacitance; maintains monotonicity and settling time. Use Value: 780pF capacitive-load stability eliminates need for external isolation resistors; 1pA input bias prevents DAC output voltage error in high-Z filter networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual op-amp with shutdown applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4233ABC+T | Same electrical specs but in 10-bump UCSP (1.5mm × 1.5mm); no exposed thermal pad. | Ultra-compact footprint for space-constrained PCBs; lower thermal mass limits continuous 200mA operation. | Select MAX4233ABC+T only when board area is critical and average output current remains <100mA. |
| OPA2350UA | Single-supply, rail-to-rail I/O; 38MHz GBWP, 22V/μs SR, but only 60mA output drive; no shutdown feature. | Lacks independent shutdown and insufficient current for RF PA bias or 32Ω headphone drive. | Choose OPA2350UA only for high-speed, low-current signal conditioning where shutdown is unnecessary. |
Compared with MAX4233ABC+T and OPA2350UA, MAX4233AUB uniquely combines dual independent shutdown, 200mA drive, and μMAX® thermal performance - making it the only option for thermally demanding, time-critical RF PA bias applications in production handsets.
Availability
MAX4233AUB is available at Aetrix Electronics and suitable for RF power amplifier biasing, portable headphone driver, wireless handset audio, and DAC buffering applications requiring stable component supply across automotive (-40°C to +125°C), industrial, and consumer programs.
Supply support for MAX4233AUB 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 communications applications.
The MAX4230–MAX4234 family was engineered specifically for high-output-drive, rail-to-rail operation in portable RF and audio subsystems - prioritizing shutdown control, capacitive-load stability, and single-supply compatibility.
FAQ
What is the operating supply voltage range for the MAX4233AUB?
The MAX4233AUB operates from a single 2.7V to 5.5V supply or dual ±1.35V to ±2.5V supplies. Its rail-to-rail input and output stages function across this full range, with guaranteed performance including 200mA output drive and 10MHz GBWP at both 2.7V and 5.5V. Absolute maximum supply voltage is 6V.
Does the MAX4233AUB support capacitive loads, and if so, up to what value?
Yes, the MAX4233AUB is unity-gain stable with capacitive loads up to 780pF without external compensation. This specification is verified across temperature and supply voltage ranges and enables direct interfacing with RF matching networks, ADC input capacitors, and ceramic output filters - eliminating the need for series isolation resistors in most designs.
How does the shutdown functionality work on the MAX4233AUB?
The MAX4233AUB features two independent shutdown inputs: SHDN1 controls amplifier 1 and SHDN2 controls amplifier 2. When either pin is pulled below 0.8V (VIL), its corresponding amplifier disables, its output is actively driven to VSS (≤150mV typical into 200Ω), and quiescent current drops to <1μA per channel. Both amplifiers power up fully within 5μs after SHDN goes high.
What package type is used for the MAX4233AUB, and what are its key mechanical properties?
The MAX4233AUB uses a 10-pin μMAX® package (3.0mm × 3.0mm × 0.8mm) with an exposed thermal pad. It follows land pattern 90-0330, supports reflow soldering at 260°C, and has a thermal derating factor of 5.6mW/°C above +70°C. The package is RoHS-compliant and rated for -40°C to +125°C operation.
Can the MAX4233AUB drive a 32Ω headset load, and what output performance is guaranteed?
Yes, the MAX4233AUB is explicitly characterized to drive 32Ω loads. At VDD = 2.7V, it guarantees VDD − VOH ≤ 500mV and VOL − VSS ≤ 500mV; at VDD = 5V, it delivers 200mA peak current, enabling 60mW/channel into 32Ω with <1% THD+N at 1kHz. Output swing remains rail-to-rail even under full 32Ω load.
MAX4233AUB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- CMOS
- Number of Circuits:
- 2
- 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 (x2 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:
- 10-uMAX/uSOP
MAX4233AUB FAQ
1.How can I place an order for MAX4233AUB through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4233AUB 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 MAX4233AUB reliable?
The price and inventory of MAX4233AUB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4233AUB is usually 5 days.
3.What payment methods are accepted for MAX4233AUB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4233AUB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4233AUB?
MAX4233AUB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4233AUB 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 MAX4233AUB?
For technical support, including MAX4233AUB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4233AUB requirements.
6.How does Aetrix verify that MAX4233AUB is sourced from the original manufacturer or authorized distributors?
All MAX4233AUB 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 MAX4233AUB meets industry standards.
7.What is the process for return or replacement of MAX4233AUB?
All MAX4233AUB units undergo pre-shipment inspection (PSI). If there is an issue with MAX4233AUB, 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 MAX4233AUB part is unused and in its original packaging.
Return procedure for MAX4233AUB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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