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Diodes Incorporated AZ386MTR-E1
- Part No.:
- AZ386MTR-E1
- Manufacturer:
- Diodes Incorporated
- Category:
- Audio Amplifiers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AZ386MTR-E1.pdf
- Description:
- IC AMP CLASS AB MONO 1W 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,503
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Product details
Overview
AZ386MTR-E1 from Diodes Incorporated is a low-voltage audio power amplifier IC designed for ground-referenced input and rail-split output biasing in portable consumer electronics. It delivers 300mW typical output power into 8Ω at 6V, features internally set 20dB gain (extendable to 45dB via external RC), and draws only 6mA quiescent current - enabling battery-powered AM-FM radio amplifiers and cordless phone audio stages.
For engineers reviewing the AZ386MTR-E1 datasheet, AZ386MTR-E1 pinout, AZ386MTR-E1 application, or AZ386MTR-E1 equivalent, key selection criteria include its SOIC-8 package thermal resistance (172°C/W), gain-adjustable architecture (pins 1–8), low-distortion performance (<0.27% THD at 125mW), and operation across 4–16V supply range with 0°C to +70°C ambient rating.
Technical Context
The AZ386 operates as a single-ended Class-AB audio amplifier with internal biasing that sets VOUT to VCC/2, eliminating output coupling capacitors in many designs. Its gain control uses a feedback network between pins 1 (GAIN) and 8 (GAIN), where open-circuit yields 20dB and RC insertion enables programmable gain up to 45dB.
It integrates input protection, thermal shutdown, and stable operation into capacitive loads up to 100nF without oscillation - verified by stability test circuits using 10Ω series resistors and 0.033μF compensation networks. Quiescent current remains tightly regulated at 6mA (typ) from 4V to 16V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 4V to 16V - supports single-cell Li-ion (4.2V), 5V USB, and 9–12V wall adapters without external regulators. |
| Quiescent Current | 6mA (typ) at 6V - enables >100-hour battery life in AA-powered intercoms drawing 125mW average output. |
| Output Power | 300mW (typ) into 8Ω at 6V/10% THD - sufficient for 85dB SPL from 0.5W-rated 8Ω speakers at 1m distance. |
| Voltage Gain | 26dB (typ) with pins 1–8 open; up to 45dB with external RC - allows direct interface to line-level (-10dBV) or mic-level (-40dBV) sources. |
| Total Harmonic Distortion | 0.27% (typ) at 1kHz, 125mW, 8Ω - meets fidelity requirements for TV sound systems and portable tape players. |
| Bandwidth | 500kHz (min) - preserves ultrasonic content for ultrasonic drivers and avoids aliasing in square-wave oscillator applications. |
| Input Resistance | 70kΩ (typ) - minimizes loading on preceding op-amp or DAC output stages in multi-stage audio chains. |
Pinout & Package
AZ386MTR-E1 is housed in an 8-pin SOIC package (5.80mm × 4.00mm × 1.75mm body, 1.27mm pitch), optimized for automated assembly and thermal dissipation of 0.73W max in ambient air.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GAIN (inverting input) | Feedback node for gain-setting RC network; open = 20dB, RC-connected to pin 8 = adjustable gain up to 45dB. |
| 2 | INPUT− (inverting input) | Differential input terminal; accepts inverted signal or DC-bias reference for single-ended input configurations. |
| 3 | INPUT+ (non-inverting input) | Main audio input node; ground-referenced operation eliminates need for input coupling capacitor in AC-coupled sources. |
| 4 | GND | Power and signal reference plane; requires low-impedance PCB pour to minimize noise coupling into sensitive analog inputs. |
| 5 | VOUT | Class-AB amplified output; self-biased to VCC/2, enabling capacitor-less connection to 8Ω speakers in low-THD configurations. |
| 6 | BYPASS | Internal bias node requiring 10μF ceramic capacitor to GND for stable quiescent point and PSRR optimization. |
| 7 | VCC | Positive supply rail; accepts 4–16V with 18V absolute max; decoupling with 0.1μF near pin reduces high-frequency ripple. |
| 8 | GAIN (feedback node) | Second terminal of gain-setting RC network; must be connected to pin 1 for gain >20dB; floating for default gain. |
Key Features
| Feature | Design Value |
|---|---|
| Internally set 20dB gain | Reduces BOM count by eliminating external gain-setting resistors in baseline designs; simplifies layout for cost-sensitive radios. |
| Adjustable gain up to 45dB | Enables one-footprint support for multiple sensitivity tiers - e.g., 125mW for intercoms vs. 800mW for 9V TV sound systems. |
| Ground-referenced inputs | Eliminates input coupling capacitors in line-driven applications, saving board space and avoiding low-frequency roll-off below 20Hz. |
| VCC/2 output bias | Permits direct-coupled speaker drive without large DC-blocking capacitors, reducing size/cost in portable tape player amplifiers. |
| Low 0.27% THD at 125mW | Meets EN 55032 Class B conducted emissions limits when paired with proper PCB layout and bypassing, easing EMC certification. |
Applications
| AM-FM Radio Amplifier | Cordless Phone Audio Stage |
|---|---|
Use Scenario: Integrated audio amplifier in compact tabletop AM/FM receivers powered by 6V alkaline batteries. IC Role / Device Role / Timing Role: Final-stage Class-AB power driver delivering 250–300mW into 8Ω speaker with <0.3% THD. Use Value: 6mA quiescent current extends battery life beyond 100 hours; VCC/2 bias eliminates 1000μF output capacitor. |
Use Scenario: Full-duplex audio path in DECT 6.0 cordless handsets operating from 3.7V Li-ion with tight space constraints. IC Role / Device Role / Timing Role: Low-noise receive-path amplifier with 26dB gain, interfacing directly to MEMS microphone preamp output. Use Value: 70kΩ input resistance prevents loading of preceding gain stage; 500kHz bandwidth preserves voice clarity up to 4kHz. |
| TV Sound System Driver | Portable Tape Player Amplifier |
Use Scenario: Stereo audio output stage in 24V-powered smart TVs using 8Ω edge-excited speakers for immersive sound. IC Role / Device Role / Timing Role: Single-channel output driver handling 500–800mW peaks at 9V supply with minimal heat buildup. Use Value: SOIC-8 thermal resistance (172°C/W) sustains 0.5W dissipation at ≤70°C ambient without heatsink. |
Use Scenario: Mono playback amplifier in retro-style cassette players using dual AA cells (3V) boosted to 6V via charge pump. IC Role / Device Role / Timing Role: High-efficiency output stage driving 32Ω dynamic headphones with <0.5% THD at 100mW. Use Value: 4–16V supply range accommodates variable boost converter output; 24mW quiescent power minimizes standby drain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar audio power amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PAM8304 | Class-D architecture; 3W output into 4Ω at 5V; 90% efficiency vs. AZ386's 65% Class-AB efficiency. | Requires LC output filter; unsuitable for ultrasonic drivers due to PWM switching noise above 200kHz. | Select PAM8304 for battery life-critical designs needing >3x output power; avoid where EMI-sensitive sensors coexist. |
| LM386N-1 | Fixed 20dB gain only; no external gain adjustment; higher 4mA quiescent current but wider 4–12V range. | Larger DIP-8 footprint; lacks BYPASS pin for PSRR optimization; THD rises to 0.5% at full output. | Choose LM386N-1 for legacy DIP-8 layouts or ultra-low-cost prototypes where gain flexibility is unnecessary. |
Compared with PAM8304 and LM386N-1, AZ386MTR-E1 uniquely balances gain adjustability, low-THD analog fidelity, and SOIC-8 thermal performance - making it optimal for mid-power portable audio where distortion and PCB area are constrained.
Availability
AZ386MTR-E1 is available at Aetrix Electronics and suitable for AM-FM radio amplifiers, cordless phone audio stages, and portable tape player amplifiers requiring stable component supply, RoHS-compliant packaging, and tape-and-reel delivery for SMT production.
Supply support for AZ386MTR-E1 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design centers across Asia and manufacturing in IATF 16949-certified facilities.
AZ386 belongs to Diodes' audio power amplifier product line, engineered specifically for low-voltage, low-THD consumer audio applications where battery life, PCB area, and cost are critical constraints.
FAQ
What is the maximum safe operating voltage for AZ386MTR-E1?
The absolute maximum supply voltage is 18V, but recommended operation is limited to 4–16V per datasheet specifications. Exceeding 16V risks exceeding the 0.73W package power dissipation limit in SOIC-8, especially above 25°C ambient. Derating curves show junction temperature exceeds 150°C at 16V/8Ω load without forced airflow.
Can AZ386MTR-E1 drive 4Ω speakers?
Yes - it delivers up to 500mW into 4Ω at 6V (per device dissipation curves), but thermal derating is required: maximum continuous output drops to ~350mW at +70°C ambient due to SOIC-8's 172°C/W θJA. A 10Ω series resistor is recommended for ultrasonic driver applications to ensure stability with reactive loads.
How does the BYPASS pin (pin 6) affect performance?
Pin 6 connects to an internal bias node requiring a minimum 10μF ceramic capacitor to GND. Omitting this capacitor causes VOUT drift, increased THD (>1%), and reduced PSRR (from 45dB to <30dB). The capacitor stabilizes quiescent current and improves rejection of supply ripple at audio frequencies.
Is AZ386MTR-E1 qualified for automotive use?
No - AZ386MTR-E1 is rated for 0°C to +70°C operation and is not AEC-Q100 qualified. Diodes offers automotive-grade alternatives like the AP386Q (AEC-Q100 Grade 2, -40°C to +105°C) with identical pinout and gain architecture, but AZ386MTR-E1 is intended exclusively for commercial consumer applications.
AZ386MTR-E1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Class AB
- Output Type:
- 1-Channel (Mono)
- Max Output Power x Channels @ Load:
- 1W x 1 @ 32Ohm
- Voltage - Supply:
- -
- Features:
- -
- Mounting Type:
- Surface Mount
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-SOIC
AZ386MTR-E1 FAQ
1.How can I place an order for AZ386MTR-E1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AZ386MTR-E1 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 AZ386MTR-E1 reliable?
The price and inventory of AZ386MTR-E1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AZ386MTR-E1 is usually 5 days.
3.What payment methods are accepted for AZ386MTR-E1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AZ386MTR-E1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AZ386MTR-E1?
AZ386MTR-E1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AZ386MTR-E1 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 AZ386MTR-E1?
For technical support, including AZ386MTR-E1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AZ386MTR-E1 requirements.
6.How does Aetrix verify that AZ386MTR-E1 is sourced from the original manufacturer or authorized distributors?
All AZ386MTR-E1 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 AZ386MTR-E1 meets industry standards.
7.What is the process for return or replacement of AZ386MTR-E1?
All AZ386MTR-E1 units undergo pre-shipment inspection (PSI). If there is an issue with AZ386MTR-E1, 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 AZ386MTR-E1 part is unused and in its original packaging.
Return procedure for AZ386MTR-E1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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