Features: Mono 1.1W (typ) and stereo 115mW (typ) outputSPI programmable 32 step digital volume control(-40.5dB to +6dB)Eight distinct SPI programmable output modes micro-SMD and LLP surface mount packaging Click and pop suppression circuitryThermal shutdown protection Low shutdown current (0.1&m...
LM4851: Features: Mono 1.1W (typ) and stereo 115mW (typ) outputSPI programmable 32 step digital volume control(-40.5dB to +6dB)Eight distinct SPI programmable output modes micro-SMD and LLP surface mount p...
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Power@ 4Ohms, 10% THD | 1.9 Watt |
Power@ 4Ohms, 1% THD | 1.5 Watt |
Power@ 8Ohms, 10% THD | 1.4 Watt |
Power@ 8Ohms, 1% THD | 1.1 Watt |
THD | 0.3 % |
PSRR | 70 dB |
SNR | Undefined dB |
Channels | 3 Channels |
THD Conditions | Pout=1W @ Vs=5V, RL=4 Ohms, 20Hz-20kHz |
PSRR Conditions | 217 Hz, Input floating |
SNR Conditions | Undefined |
User Supply | 5 Volt |
Audio Mux | Yes |
Capless Headphone | Yes |
ClassD Driver | No |
Interface | I2C |
Stereo Inputs | 1 |
National 3D | No |
Digital Volume Control Max | 6 dB |
Digital Volume Control Min | -40.5 dB |
Output Modes | 8 |
Supply Range | +2.6 - +5 V |
Mono Inputs | 1 |
Temperature Min | -40 deg C |
Temperature Max | 85 deg C |
Loudspeaker Type | Class AB |
Headphone Type | Virtual Ground |
Loudspeaker Outputs | 1 |
View Using Catalog |
Supply Voltage |
6.0V |
Storage Temperature |
-65°C to +150°C |
Input Voltage |
-0.3V to VDD +0.3V |
Power Dissipation (Note 11) |
Internally limited |
Solder Information (Note 1)Vapor Phase (60 sec.) Infrared (15 sec.) |
215°C 220°C |
ESD Susceptibility (Note 13) |
200V |
Junction Temperature |
150°C |
Thermal Resistance JA (typ) - LQA24A JC (typ) - LQA24A JA (typ) - BLA18AAB JC (typ) - BLA18AAB JA (typ) - TLA18AAA JC (typ) - TLA18AAA |
42°C/W 3.0°C/W 48°C/W (Note 9) 23°C/W (Note 9) 48°C/W (Note 9) 23°C/W (Note 9) |
The LM4851 is an audio power amplifier system capable of delivering 1.1W (typ) of continuous average power into a mono 8Ω bridged-tied load (BTL) with 1% THD+N and 115mW (typ) per channel of continuous average power into stereo 32Ω BTL loads with 0.5% THD+N, using a 5V power supply. The LM4851 features a 32 step digital volume control and eight distinct output modes. The digital volume control and output modes are programmed through a three-wire SPI serial control interface, that allows flexibility in routing and mixing audio channels.
The LM4851 has 3 inputs: one pair for a two-channel stereo signal and the third for a singlechannel mono input.
The LM4851 is designed for cellular phone, PDA, and other portable handheld applications. It delivers high quality output power from a surface-mount package and requires only five external components.