Overview
The ADAU1592ACPZ from Analog Devices Inc. is a 2-channel, bridge-tied load (BTL) switching audio power amplifier integrated with a Σ-Δ modulator. This device accepts an analog input signal and generates a switching output to drive speakers directly. It features a digital, microcontroller-compatible interface for controlling reset, mute, and PGA gain, as well as output signals for thermal and overcurrent error conditions. The output stage can operate from supply voltages ranging from 9 V to 18 V, while the analog modulator and digital logic operate from a 3.3 V supply.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| INPUT IMPEDANCE | - | 20 kΩ | - | - | AINL/AINR |
| OUTPUT DC OFFSET VOLTAGE | -3 mV | - | 3 mV | - | |
| ANALOG SUPPLY VOLTAGE (AVDD) | 3.0 V | 3.3 V | 3.6 V | - | |
| DIGITAL SUPPLY VOLTAGE (DVDD) | 3.0 V | 3.3 V | 3.6 V | - | |
| POWER TRANSISTOR SUPPLY VOLTAGE (PVDD) | 9 V | 15 V | 18 V | - | |
| POWER-DOWN CURRENT (STDN held low) | - | - | - | - | AVDD: 5-60 μA, DVDD: 0.1-0.24 mA, PVDD: 0.082-0.25 mA |
| MUTE CURRENT (MUTE held low) | - | - | - | - | AVDD: 13-20 mA, DVDD: 1.7-3.2 mA, PVDD: 5.4-8 mA |
| OPERATING CURRENT (STDN and MUTE held high, no input) | - | - | - | - | AVDD: 13-30 mA, DVDD: 2.7-4 mA, PVDD: 44-65 mA |
| TOTAL HARMONIC DISTORTION + NOISE (THD + N) | - | 0.005% | - | - | @6 Ω @1 W |
| PSRR (Power Supply Rejection Ratio) | - | 65 dB | - | - |
Key Features
- Integrated Σ-Δ modulator accepting analog input and generating a switching output to drive speakers directly
- Digital, microcontroller-compatible interface for control of reset, mute, and PGA gain
- Output signals for thermal and overcurrent error conditions
- Operating temperature range: -40°C to 85°C
- Standby mode for efficient power consumption
- Depop, mute, short-circuit, and thermal protection
- Surface mount mounting type with 48-lead LFCSP (7mm x 7mm x 0.85mm w/ EP) package
Applications
- Multimedia systems
- Speaker arrays
- Automotive infotainment systems
- Loudspeaker drivers
- Flat panel televisions and PC audio systems
- Mini-components
Q & A
- Q: What is the ADAU1592ACPZ and what are its primary functions?
A: The ADAU1592ACPZ is a 2-channel, bridge-tied load (BTL) switching audio power amplifier with an integrated Σ-Δ modulator. It accepts an analog input signal and generates a switching output to drive speakers directly, and it includes a digital interface for control and error signals.
- Q: What are the supply voltage ranges for the ADAU1592ACPZ?
A: The output stage operates from supply voltages ranging from 9 V to 18 V, while the analog modulator and digital logic operate from a 3.3 V supply.
- Q: What kind of protection does the ADAU1592ACPZ offer?
A: The ADAU1592ACPZ offers depop, mute, short-circuit, and thermal protection.
- Q: What is the typical THD + N for the ADAU1592ACPZ?
A: The typical THD + N is 0.005% at 6 Ω and 1 W.
- Q: What are the common applications of the ADAU1592ACPZ?
A: Common applications include multimedia systems, speaker arrays, automotive infotainment systems, loudspeaker drivers, flat panel televisions, and PC audio systems.
- Q: What is the package type and pin count of the ADAU1592ACPZ?
A: The package type is 48-lead LFCSP (7mm x 7mm x 0.85mm w/ EP).
- Q: Does the ADAU1592ACPZ have standby mode for power efficiency?
A: Yes, it has a standby mode for efficient power consumption.
- Q: What is the operating temperature range of the ADAU1592ACPZ?
A: The operating temperature range is -40°C to 85°C.
- Q: How does the Σ-Δ modulator in the ADAU1592ACPZ work?
A: The Σ-Δ modulator is a 5th-order modulator that generates a pulse density modulation (PDM) 1-bit stream from the analog input signal, with feedback from the power stage to reduce nonlinearity and improve THD + N performance.
- Q: Is the ADAU1592ACPZ RoHS compliant?
A: The ADAU1592ACPZ-RL7 is non-RoHS compliant.
