Overview
The ADAU1592ACPZ-RL is a 2-channel, bridge-tied load (BTL) switching audio power amplifier produced by Analog Devices Inc. This integrated circuit combines an analog input stage with a Σ-Δ modulator and a power stage, enabling direct drive of speakers. The device operates with a digital, microcontroller-compatible interface for control functions such as reset, mute, and PGA gain adjustment. It also includes features like thermal and overcurrent protection, and on/off-mute pop-noise suppression.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Input Impedance | - | - | 20 kΩ | - | AINL/AINR |
| Output DC Offset Voltage | - | - | ±3 mV | - | - |
| Analog Supply Voltage (AVDD) | 3.0 | 3.3 | 3.6 | V | - |
| Digital Supply Voltage (DVDD) | 3.0 | 3.3 | 3.6 | V | - |
| Power Transistor Supply Voltage (PVDD) | 9 | 15 | 18 | V | - |
| Power-Down Current (STDN held low) | - | - | 5 μA (AVDD), 0.24 mA (DVDD), 0.25 mA (PVDD) | - | - |
| Mute Current (MUTE held low) | - | - | 20 mA (AVDD), 3.2 mA (DVDD), 8 mA (PVDD) | - | - |
| Operating Current (STDN and MUTE held high, no input) | - | - | 30 mA (AVDD), 4 mA (DVDD), 65 mA (PVDD) | - | - |
Key Features
- Integrated stereo modulator and power stage
- 0.005% THD + N and 101 dB dynamic range
- PSRR > 65 dB
- RDS-ON < 0.3 Ω (per transistor)
- Efficiency > 90% (8 Ω)
- EMI-optimized modulator
- On/off-mute pop-noise suppression
- Short-circuit protection and overtemperature protection
- Digital, microcontroller-compatible interface for control functions
Applications
- Flat panel televisions
- PC audio systems
- Mini-components
Q & A
- What is the ADAU1592ACPZ-RL?
The ADAU1592ACPZ-RL is a 2-channel, bridge-tied load (BTL) switching audio power amplifier with an integrated Σ-Δ modulator. - What are the supply voltage ranges for the ADAU1592?
The analog modulator and digital logic operate from a 3.0 V to 3.6 V supply, while the power transistor supply voltage ranges from 9 V to 18 V. - What is the efficiency of the ADAU1592?
The efficiency of the ADAU1592 is greater than 90% at an 8 Ω load. - Does the ADAU1592 have thermal protection?
Yes, the ADAU1592 includes extensive thermal and overcurrent protection circuits. - How does the Σ-Δ modulator work?
The Σ-Δ modulator is a 5th-order modulator that converts the analog input signal into a pulse density modulation (PDM) 1-bit stream, which is then output to the power stage. - What are some key applications of the ADAU1592?
The ADAU1592 is used in flat panel televisions, PC audio systems, and mini-components. - Does the ADAU1592 have pop-noise suppression?
Yes, the ADAU1592 includes built-in circuits to suppress turn-on and turn-off pop and click noises. - What is the dynamic range of the ADAU1592?
The dynamic range of the ADAU1592 is 101 dB. - Is the ADAU1592 EMI-optimized?
Yes, the modulator of the ADAU1592 is EMI-optimized. - What is the typical THD + N of the ADAU1592?
The typical THD + N of the ADAU1592 is 0.005%.
