AD1994: Class-D Audio Power Amplifier – 2 × 25W
The AD1994 class-D amplifier integrates a stereo ∑∆ modulator and stereo “bridge-tied" load (BTL) power stage onto a single die capable of delivering 50W of continuous power without a heat sink. The ...More
AD1994: Class-D Audio Power Amplifier – 2 × 25W
Product Description
The AD1994 class-D amplifier integrates a stereo ∑∆ modulator and stereo “bridge-tied" load (BTL) power stage onto a single die capable of delivering 50W of continuous power without a heat sink. The new ∑∆ modulator architecture uses a patented dynamic hysteresis algorithm to achieve audiophile performance (THD < 0.005 %, SNR > 105 dB) without compromising efficiency. The closed-loop architecture and continuous-time modulator front-end achieve a PSRR > 65 dB, and the stereo BTL power stage requires only a single supply that can operate over a wide voltage range. The ∑∆ modulator in the AD1994. designed to minimize radiated and conducted EMI and RF emissions, can optionally be used to drive external power devices to achieve arbitrarily high output power.
Applications
- Advanced televisions
- Compact multimedia systems
- Minicomponents
- Active loudspeakers
Features
- Integrated stereo modulator and power stage
- <0.005% THD + N
- 105 dB dynamic range (A-weighted)
- 2 x 25 W output power (6 Ω, 10% THD + N)
- 1 x 50 W output power (3 Ω, 10% THD + N)
- EMI optimized modulator
- On-off-mute pop noise suppression
- RDS-ON < 0.3 Ω (per transistor)
- PSRR > 65 dB
- Short-circuit & over-temperature protection
Diagrams
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- Other Diagrams
- Symbols and Footprints
Functional Block Diagram for AD1994
Class-D Audio Power Amplifier – 2 × 25W
Other Diagrams for AD1994
Class-D Audio Power Amplifier – 2 × 25W
AD1994 Pin Configuration
Functional Block Diagram for AD1994
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| Part# | Output Power (W) | Efficiency (%) | Dynamic Range (dB) | SNR (dB) | THD+N (dB) | Pos Supply | Supply Current (max) | Price* (1000-4999) |
|---|---|---|---|---|---|---|---|---|
| AD1990 | 5 | 84 | 102 | 102 | -90 | +8V to +12V | 30mA | - |
| AD1991 | 20 | 87 | - | - | - | +4.5V to +5.5V | 2.75mA | $8.00 |
| AD1992 | 10 | 84 | 102 | 102 | -90 | +8V to +20V | 30mA | - |
| AD1994 | 25 | 84 | 102 | 102 | -90 | +8V to +20V | 30mA | - |
| ADAU1513 | 23 | 90 | 96 | 96 | - | +3V to +3.6V | 43.1mA | $3.15 |
| ADAU1590 | 15.5 | 90 | 101 | 101 | - | +3V to +3.6V | 60µA | $3.49 |
| ADAU1592 | 18 | 87 | 101 | 101 | -85 | +9V to +18V | 44mA | $3.66 |
| SSM2301 | 1.4 | 85 | - | 98 | - | +2.5V to +5V | 4.2mA | $0.45 |
| SSM2302 | 2 | 85 | - | 98 | -67 | +2.5V to +5V | - | $0.92 |
| SSM2304 | 2 | 85 | - | 102 | -67 | +2.5V to +5V | 7mA | $0.81 |
| SSM2306 | 2 | 87 | - | 96 | - | +2.5V to +5V | 6.5mA | $0.99 |
| SSM2311 | 3 | 85 | - | 98 | -67 | +2.5V to +5.5V | 4.2mA | $0.73 |
| SSM2315 | 3 | 93 | - | 103 | - | +2.5V to +5.5V | 3.3mA | $0.82 |
| SSM2319 | 3 | 90 | - | 98 | - | +2.5V to +5.5V | 3.7mA | $0.90 |
* The pricing listed here is provided only for budgetary purposes as recommended list price in U.S.
Dollars in the United States ex factor per unit for the stated volume. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
** Pricing is currently unavailable. Click on the product number to see the Product Page for additional information.