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Analog Devices Inc./Maxim Integrated MAX4369EBL+
- Part No.:
- MAX4369EBL+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 9-WFBGA, CSPBGA
- Datasheet:
-
MAX4369EBL+.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 9UCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,850
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Product details
Overview
MAX4369EBL+ from Maxim Integrated is a dual, rail-to-rail output operational amplifier in a 9-bump UCSP (1.5mm × 1.5mm), designed for high-output-drive audio applications. It delivers ±87mA output current at 5V, drives 120mW into 16Ω with 0.03% THD + N at 1kHz, and operates from a single 2.3V to 5.5V supply across –40°C to +85°C.
For engineers reviewing the MAX4369EBL+ datasheet, MAX4369EBL+ pinout, MAX4369EBL+ application, or MAX4369EBL+ equivalent, key selection criteria include output power capability into low-impedance loads, rail-to-rail swing performance under battery-voltage constraints, thermal shutdown behavior, and UCSP layout compatibility for space-constrained portable designs.
Technical Context
The MAX4369EBL+ integrates two independent high-current op amps with rail-to-rail output stages capable of sourcing/sinking up to ±125mA (min) at 5V. Its unity-gain stability extends to 3.5MHz, and it maintains 96dB PSRR and 80dB CMRR over full supply and common-mode ranges.
Each amplifier features thermal overload protection triggering at +165°C with 10°C hysteresis, short-circuit protection, and capacitive-load stability up to 200pF without external compensation. The device uses bipolar process technology and supports both single-ended and differential (BTL) audio configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.3V to 5.5V - enables direct operation from Li-ion (3.0–4.2V) or dual-AA (3.0V) batteries without regulation. |
| Output Current (Source/Sink) | ±87mA (guaranteed at 5V) - sufficient to drive 16Ω speakers directly without external boost stages. |
| THD + N | 0.03% at 1kHz, 16Ω, 120mW - meets fidelity requirements for premium headset and PDA audio playback. |
| Rail-to-Rail Output Swing | VOL = 310mV, VOH = VCC − 350mV (RL = 16Ω) - maximizes dynamic range in low-voltage, single-supply systems. |
| Unity-Gain Bandwidth | 3.5MHz - supports stable audio amplification up to 20kHz with >73° phase margin and no peaking. |
| PSRR | 96dB (typical, 2.3–5.5V) - rejects battery ripple and digital noise in mixed-signal portable PCBs. |
| Operating Temperature | –40°C to +85°C - qualified for cellular phone and industrial handheld environments. |
Pinout & Package
MAX4369EBL+ is housed in a 1.5mm × 1.5mm ultra chip-scale package (UCSP-9) with wafer-level bump configuration. Bump B2 is not populated; all other bumps are electrically active.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | INA− | Inverting input of Amplifier A - connects to feedback network in standard gain configurations. |
| A2 | OUTA | Output of Amplifier A - drives left-channel load (e.g., speaker, headphone tip) with rail-to-rail swing. |
| A3 | INA+ | Noninverting input of Amplifier A - accepts left-channel audio signal or bias reference. |
| B1 | GND | Analog ground reference - must be low-impedance, separate from digital ground in mixed-signal layouts. |
| B3 | VCC | Positive supply input - requires local 0.1µF + 10µF bypassing to minimize supply-induced distortion. |
| C1 | INB− | Inverting input of Amplifier B - used for right-channel feedback or differential input configuration. |
| C2 | OUTB | Output of Amplifier B - drives right-channel load (e.g., headphone ring) with matched performance to OUTA. |
| C3 | INB+ | Noninverting input of Amplifier B - accepts right-channel audio signal or bias voltage (e.g., VCC/2). |
Key Features
| Feature | Design Value |
|---|---|
| High-output-drive capability | Delivers 120mW into 16Ω and 75mW into 32Ω at 1% THD + N - eliminates need for discrete output transistors in compact audio systems. |
| Rail-to-rail output stage | Swings within 310mV of GND and 350mV of VCC at 16Ω - preserves >90% of theoretical output voltage headroom at 3.3V supply. |
| Thermal and short-circuit protection | Shuts down at +165°C junction temperature with 10°C hysteresis - prevents permanent damage during sustained 120mW output or output shorts. |
| Low-noise, low-distortion architecture | 40nV/√Hz input voltage noise and 0.03% THD + N at 1kHz - ensures clean audio reproduction without post-filtering. |
| Capacitive-load stability | Stable with up to 200pF load capacitance - accommodates typical PCB trace capacitance and ESD protection diodes without oscillation. |
Applications
| Cellular Phone Audio | Headphone Driver |
|---|---|
Use Scenario: Driving mono or stereo speakers/headsets in GSM/UMTS handsets with 3.3V or 3.6V battery supply. IC Role / Device Role / Timing Role: Dual-channel line driver and headphone amplifier delivering full-scale analog audio signals with minimal external components. Use Value: Eliminates discrete output buffers and reduces BOM count by integrating rail-to-rail drive, thermal protection, and 0.03% THD + N in a 2.25mm² footprint. |
Use Scenario: Direct coupling to 3-wire 32Ω stereo headphones in PDAs and portable media players. IC Role / Device Role / Timing Role: Single-ended stereo amplifier with DC bias set to VCC/2, using COUT to block output DC offset from earpieces. Use Value: Delivers 120mW/channel into 16Ω and 75mW into 32Ω while maintaining <1% THD + N - meets IEC 60268 loudness and distortion standards for consumer audio. |
| PDA Speaker Amplifier | Differential (BTL) Audio Interface |
Use Scenario: Driving 8Ω or 16Ω mono loudspeaker in handheld computing devices with limited board area. IC Role / Device Role / Timing Role: High-current output stage replacing Class-D ICs where EMI sensitivity prohibits switching topologies. Use Value: Provides linear amplification with 3.5MHz bandwidth and 96dB PSRR - avoids RF interference in Wi-Fi/Bluetooth coexistence scenarios. |
Use Scenario: Implementing balanced differential output for noise-immune audio routing in automotive infotainment head units. IC Role / Device Role / Timing Role: Configured as differential-input/differential-output (BTL) amplifier using internal dual op-amps with matched gain-setting resistors. Use Value: Doubles effective output swing and eliminates output coupling capacitors - improves low-frequency response below 50Hz without increasing DC bias drift risk. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual high-output-drive op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4808MM/NOPB | Single-channel, 105mW into 16Ω, 0.1% THD + N, SO-8 package (3mm × 3mm) | Lacks dual-channel integration; requires two devices for stereo, increasing PCB area and component count. | Choose LM4808MM/NOPB only when single-channel operation suffices and SO-8 assembly is preferred over UCSP reflow. |
| TPA6138A2RTJR | Dual-channel, 110mW into 16Ω, 0.05% THD + N, 16-pin QFN (3mm × 3mm), integrated shutdown control | Includes enable/shutdown pin and higher quiescent current (2.5mA per channel vs. 1mA); larger footprint than UCSP. | Select TPA6138A2RTJR if system-level power sequencing or thermal derating via enable control is required. |
Compared with LM4808MM/NOPB and TPA6138A2RTJR, the MAX4369EBL+ offers the smallest package (1.5mm × 1.5mm), lowest THD + N (0.03%), and tightest rail-to-rail swing - making it optimal for ultra-compact, battery-sensitive audio endpoints where board space and fidelity are primary constraints.
Availability
MAX4369EBL+ is available at Aetrix Electronics and suitable for cellular phones, headphone drivers, PDA speaker amplifiers, and differential audio interfaces requiring stable component supply, long-term lifecycle support, and consistent UCSP packaging.
Supply support for MAX4369EBL+ 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 U.S.-based semiconductor company specializing in precision analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX4369EBL+ belongs to Maxim's high-output-drive audio op amp product line, engineered specifically for space-constrained portable electronics needing rail-to-rail performance, thermal robustness, and low-distortion audio amplification without external boost circuitry.
FAQ
What is the maximum continuous output power of the MAX4369EBL+ into a 16Ω load?
The MAX4369EBL+ delivers 120mW of continuous average power into a 16Ω load at 1% THD + N and 1kHz. This value is guaranteed by design and verified across the –40°C to +85°C operating range. The MAX4369EBL+ achieves this with rail-to-rail output swing and ±87mA drive capability at 5V supply, enabling direct speaker drive without external transistors.
Does the MAX4369EBL+ require external output coupling capacitors in single-ended configurations?
Yes, the MAX4369EBL+ requires external output-coupling capacitors (COUT) in single-ended configurations to block DC bias from reaching the load. The capacitor value is determined by the load impedance and desired low-frequency cutoff; for example, a 1000µF capacitor yields ~10Hz cutoff into 16Ω. The MAX4369EBL+ datasheet provides detailed guidance on COUT selection based on THD + N targets and load variation.
Can the MAX4369EBL+ operate from a 3.3V supply while maintaining full output drive capability?
Yes, the MAX4369EBL+ operates from 2.3V to 5.5V and maintains functional output drive at 3.3V. At 3.3V, it delivers ≥56mW into 32Ω and ≥30mW into 16Ω at 1% THD + N. While peak current drops versus 5V operation, the rail-to-rail output stage ensures >85% of theoretical swing - making the MAX4369EBL+ viable for modern 3.3V portable systems with appropriate load matching.
How does the thermal shutdown feature of the MAX4369EBL+ behave under sustained overload?
The MAX4369EBL+ activates thermal shutdown when junction temperature exceeds +165°C, disabling both amplifier outputs. Once the die cools by 10°C (to +155°C), outputs resume. Under continuous overload, this causes pulsing output - a fail-safe mechanism preventing permanent damage. The MAX4369EBL+'s UCSP package has θJA = 211°C/W, so ambient temperature, PCB copper area, and airflow critically affect trip timing.
Is the MAX4369EBL+ pin-compatible with other UCSP op amps from Maxim's portfolio?
No, the MAX4369EBL+ uses a proprietary 9-bump UCSP layout (UCSP-9, pkg code B9-2) with specific bump assignments (e.g., B2 unpopulated). It is not pin-compatible with other UCSP op amps such as MAX4477 or MAX9635. Layout must follow the exact bump map in the MAX4369EBL+ datasheet - swapping packages without redesign risks misconnection or nonfunctional operation.
MAX4369EBL+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 9-WFBGA, CSPBGA
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Differential, Rail-to-Rail
- Slew Rate:
- 1V/µs
- Gain Bandwidth Product:
- 3.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 200 nA
- Voltage - Input Offset:
- 350 µV
- Current - Supply:
- 1mA (x2 Channels)
- Current - Output / Channel:
- 250 mA
- Voltage - Supply Span (Min):
- 2.3 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 9-UCSP (1.52x1.52)
MAX4369EBL+ FAQ
1.How can I place an order for MAX4369EBL+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4369EBL+ 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 MAX4369EBL+ reliable?
The price and inventory of MAX4369EBL+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4369EBL+ is usually 5 days.
3.What payment methods are accepted for MAX4369EBL+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4369EBL+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4369EBL+?
MAX4369EBL+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4369EBL+ 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 MAX4369EBL+?
For technical support, including MAX4369EBL+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4369EBL+ requirements.
6.How does Aetrix verify that MAX4369EBL+ is sourced from the original manufacturer or authorized distributors?
All MAX4369EBL+ 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 MAX4369EBL+ meets industry standards.
7.What is the process for return or replacement of MAX4369EBL+?
All MAX4369EBL+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4369EBL+, 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 MAX4369EBL+ part is unused and in its original packaging.
Return procedure for MAX4369EBL+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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