TDA2005R - 20W Dual Audio Power Amplifier | STMicroelectronics
MPN: TDA2005R ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.27 | $3.27 |
| 10 | $2.94 | $29.40 |
| 100 | $2.61 | $261.00 |
| 500 | $2.35 | $1,175.00 |
| 1,000 | $2.09 | $2,090.00 |
TDA2005R Overview
An audio power amplifier is an electronic device that increases the amplitude of low-power audio signals to a level sufficient to drive loudspeakers. In the signal chain, the audio power amplifier sits between the preamplifier and the speakers, converting a small input signal into a high-power output while maintaining fidelity. The TDA2005R belongs to the class of linear audio amplifiers, specifically a class B amplifier, which offers a good balance between efficiency and linearity, minimizing distortion while providing adequate power output.
Key features of the TDA2005R include a wide supply voltage range of 8V to 18V, low quiescent current, and built-in short-circuit and thermal protection. The device operates with a typical supply voltage of 14.4V, making it ideal for automotive environments. It features a high output power of 20W per channel into 4Ω, with a total harmonic distortion (THD) of 0.5% at 1kHz and 10W output. The amplifier also offers a high signal-to-noise ratio, ensuring clean audio reproduction.
The TDA2005R uses a complementary output stage with a bipolar junction transistor (BJT) architecture, providing robust performance and reliability. It includes a mute function for power-on transient suppression and a standby mode to reduce power consumption when not in use. The device is designed to operate over a temperature range of -40°C to +150°C, making it suitable for harsh automotive environments.
Typical applications include car radio amplifiers, portable audio systems, and active speaker systems. In a car radio, the TDA2005R can be used to drive two speakers directly, providing a simple and cost-effective stereo solution. For portable audio, its low quiescent current and wide supply range allow operation from battery sources.
When designing with the TDA2005R, ensure adequate heat sinking is provided, as the device can dissipate significant power at high output levels. The thermal resistance of the Multiwatt-11 package is 3.5°C/W, so a heatsink is required for continuous operation at high power. Additionally, proper PCB layout with short, wide traces for power and ground connections is essential to minimize noise and ensure stability.
Drop-in alternatives for TDA2005R — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TDA2005
✅ Drop-In📋 Reference alternative (not in catalog)
TDA2005S
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TDA2005M
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TDA2004R
✅ Drop-In📋 Reference alternative (not in catalog)
TDA7264
✅ Drop-In📋 Reference alternative (not in catalog)
TDA2005R Maximum Ratings & Electrical Characteristics
| Output Power | 20 W per channel (4Ω, 14.4V) |
| Amplifier Class | Class B |
| Number of Channels | 1-Channel (Mono) or 2-Channel (Stereo) |
| Supply Voltage Range | 8 V to 18 V |
| Typical Supply Voltage | 14.4 V |
| Total Harmonic Distortion (THD) | 0.5% at 1kHz, 10W |
| Output Current Capability | Up to 3.5 A |
| Minimum Load Impedance | 1.6 Ω (stereo) |
| Package | Multiwatt-11 (Vertical, Bent and Staggered Leads) |
| Mounting Type | Through Hole |
| Operating Temperature Range | -40°C to +150°C |
| Thermal Resistance | 3.5 °C/W |
| RoHS Status | Compliant |
TDA2005R Pin Configuration
| Pin 1 | OUT1 — Output channel 1 |
| Pin 2 | GND — Ground |
| Pin 3 | IN1 — Input channel 1 |
| Pin 4 | GND — Ground |
| Pin 5 | IN2 — Input channel 2 |
| Pin 6 | GND — Ground |
| Pin 7 | OUT2 — Output channel 2 |
| Pin 8 | VCC — Power supply |
| Pin 9 | GND — Ground |
| Pin 10 | GND — Ground |
| Pin 11 | GND — Ground |
Typical Applications
TDA2005R is suitable for 6 applications: Car Radio Amplifier, Portable Audio System, Active Speaker System, Home Theater System, Musical Instrument Amplifier, Public Address System.
Car Radio Amplifier
The TDA2005R is specifically designed for car radio applications, delivering up to 20W per channel into 4Ω loads. Its wide supply voltage range of 8V to 18V accommodates automotive battery voltage variations, and its robust protection features (short-circuit, thermal, load dump) ensure reliable operation in harsh environments. In a typical car radio, the TDA2005R drives two speakers directly, providing a simple and cost-effective stereo solution. The device's high output current capability (up to 3.5A) allows it to drive low-impedance loads, making it suitable for high-power audio systems. When designing with the TDA2005R in automotive applications, ensure adequate heat sinking is provided, as the device can dissipate significant power at high output levels. The thermal resistance of the Multiwatt-11 package is 3.5°C/W, so a heatsink is required for continuous operation at high power. Proper PCB layout with short, wide traces for power and ground connections is essential to minimize noise and ensure stability.
Recommended
Portable Audio System
The TDA2005R's low quiescent current and wide supply voltage range (8V to 18V) make it suitable for portable audio systems powered by batteries. Its high output power of 20W per channel into 4Ω loads provides sufficient volume for portable speakers, while its class B operation ensures reasonable efficiency. In a portable audio system, the TDA2005R can be used to drive two speakers directly, providing a compact and efficient stereo solution. The device's built-in short-circuit and thermal protection ensure reliable operation in portable applications where heat dissipation may be limited. When designing with the TDA2005R in portable audio systems, consider the power dissipation at high output levels and provide adequate heat sinking or thermal management. The device's operating temperature range of -40°C to +150°C allows it to operate in a wide range of environmental conditions.
Recommended
Active Speaker System
The TDA2005R is well-suited for active speaker systems, where it can drive the speakers directly without the need for an external amplifier. Its high output power of 20W per channel into 4Ω loads provides sufficient volume for active speakers, while its class B operation ensures reasonable efficiency. In an active speaker system, the TDA2005R can be used to drive two speakers directly, providing a simple and cost-effective stereo solution. The device's built-in short-circuit and thermal protection ensure reliable operation in active speaker applications where heat dissipation may be limited. When designing with the TDA2005R in active speaker systems, consider the power dissipation at high output levels and provide adequate heat sinking or thermal management. The device's operating temperature range of -40°C to +150°C allows it to operate in a wide range of environmental conditions.
Recommended
Home Theater System
The TDA2005R can be used in home theater systems to drive surround sound speakers, providing high-quality audio amplification. Its high output power of 20W per channel into 4Ω loads is sufficient for home theater applications, while its class B operation ensures reasonable efficiency. In a home theater system, the TDA2005R can be used to drive two speakers directly, providing a simple and cost-effective stereo solution. The device's built-in short-circuit and thermal protection ensure reliable operation in home theater applications where heat dissipation may be limited. When designing with the TDA2005R in home theater systems, consider the power dissipation at high output levels and provide adequate heat sinking or thermal management. The device's operating temperature range of -40°C to +150°C allows it to operate in a wide range of environmental conditions.
Recommended
Musical Instrument Amplifier
The TDA2005R can be used in musical instrument amplifiers to drive speakers, providing high-quality audio amplification. Its high output power of 20W per channel into 4Ω loads is sufficient for practice amplifiers, while its class B operation ensures reasonable efficiency. In a musical instrument amplifier, the TDA2005R can be used to drive a single speaker or two speakers in stereo, providing a simple and cost-effective solution. The device's built-in short-circuit and thermal protection ensure reliable operation in musical instrument applications where heat dissipation may be limited. When designing with the TDA2005R in musical instrument amplifiers, consider the power dissipation at high output levels and provide adequate heat sinking or thermal management. The device's operating temperature range of -40°C to +150°C allows it to operate in a wide range of environmental conditions.
Recommended
Public Address System
The TDA2005R can be used in public address systems to drive speakers, providing high-quality audio amplification. Its high output power of 20W per channel into 4Ω loads is sufficient for small to medium-sized venues, while its class B operation ensures reasonable efficiency. In a public address system, the TDA2005R can be used to drive two speakers directly, providing a simple and cost-effective stereo solution. The device's built-in short-circuit and thermal protection ensure reliable operation in public address applications where heat dissipation may be limited. When designing with the TDA2005R in public address systems, consider the power dissipation at high output levels and provide adequate heat sinking or thermal management. The device's operating temperature range of -40°C to +150°C allows it to operate in a wide range of environmental conditions.
Recommended
Recommended Products Summary
Engineering reference data for TDA2005R — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TDA2005 | TDA2005S | TDA2005M | TDA2004R | TDA7264 |
|---|---|---|---|---|---|---|
| Package | Multiwatt-11 | Multiwatt-11 | Multiwatt-11 | Multiwatt-11 | Multiwatt-11 | Multiwatt-11 |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Output Power | 20 W per channel | 20 W per channel | 20 W per channel | 20 W per channel | 10 W per channel | 25 W per channel |
| Supply Voltage Range | 8 V to 18 V | 8 V to 18 V | 8 V to 18 V | 8 V to 18 V | 8 V to 18 V | 8 V to 18 V |
| Amplifier Class | Class B | Class B | Class B | Class B | Class B | Class AB |
| Number of Channels | 1 or 2 | 1 or 2 | 2 | 1 (bridge) | 2 | 2 |
| Operating Temperature Range | -40°C to +150°C | -40°C to +150°C | -40°C to +150°C | -40°C to +150°C | -40°C to +150°C | -40°C to +150°C |
Key Differentiators
- High output power of 20W per channel (vs TDA2004R)
- True pin-to-pin equivalent of TDA2005 (vs TDA2005)
- Wide supply voltage range of 8V to 18V (vs TDA7264)
Design Notes
The TDA2005R can dissipate significant power at high output levels. With a thermal resistance of 3.5°C/W for the Multiwatt-11 package, a heatsink is required for continuous operation at high power. For example, at 20W output per channel, the power dissipation can be substantial, and the junction temperature must be kept below the maximum rating of 150°C. Use a heatsink with adequate thermal capacity and ensure proper thermal coupling to the package.
Proper PCB layout is essential for the TDA2005R to minimize noise and ensure stability. Use short, wide traces for power and ground connections to reduce inductance and resistance. Place decoupling capacitors close to the VCC and GND pins to filter high-frequency noise. Additionally, keep input and output traces separated to prevent feedback and oscillation.
Ensure the supply voltage does not exceed the maximum rating of 18V, as this can damage the device. Also, avoid operating the amplifier with loads below the minimum impedance of 1.6Ω in stereo applications, as this can cause excessive current draw and overheating. Always provide adequate heat sinking and follow the recommended PCB layout guidelines to ensure reliable operation.
Compliance Information
RoHS compliant per STMicroelectronics product page. Not AEC-Q100 qualified as it is not an automotive-grade IC.
