1. General/Overview

️· Device: LM49120 Audio Amplifier
️· Functionality: This is a multi-channel amplifier, likely designed for portable devices or applications requiring multiple audio outputs.

2. Power Output & Performance

️· Speaker Amplifier (Mode 1, BTL):
- Output Power (PO): 1.3 Watts (at 1% THD+N, 1kHz, 8 Ohm load, BTL Mode 1)
️· Headphone Amplifier (OCL Mode 8):
- Output Power (PO): 85 mW (at 1% THD+N, 1kHz, 32 Ohm load, OCL Mode 8)
️· Total Harmonic Distortion + Noise (THD+N):
- Speaker Output: 0.05% (at 250mW, 1kHz, 8 Ohm, BTL, Mode 1)
- Headphone Output (SE, Mode 8): 0.015% (at 12mW, 32 Ohm, OCL, Mode 8)
️· Output Noise (A-weighted):
- Speaker Amplifier (Mode 1): 17 μV
- Speaker Amplifier (Mode 2): 27 μV
- Speaker Amplifier (Mode 2): 33 μV
- Headphone Amplifier (SE, Mode 4): 8 μV
- Headphone Amplifier (SE, Mode 8): 8 μV
- Headphone Amplifier (SE, Mode 12): 12 μV
- Headphone Amplifier (OCL, Mode 4): 9 μV
- Headphone Amplifier (OCL, Mode 8): 9 μV
- Headphone Amplifier (OCL, Mode 12): 12 μV

3. Power Supply Rejection Ratio (PSRR)

️· The PSRR values are dependent on a ripple voltage (VRIPPLE) of 200mV and a frequency (fRIPPLE) of 217Hz, using a capacitor (CB) of 2.2μF and a BTL configuration.
️· Speaker Output (6dB Gain):
- PSRR: 69 dB (Mode 1)
- PSRR: 60 dB (Mode 4)
- PSRR: 58 dB (Mode 3)
️· Speaker Output (0dB Gain):
- PSRR: 84 dB
- PSRR: 63 dB
- PSRR: 62 dB
️· Headphone Output:
- PSRR: 75 dB (SE, Modes 4, 8, and OCL, Modes 4, 8)
- PSRR: 72 dB (SE, Mode 12 and OCL, Mode 12)

4. Crosstalk

️· Headphone Amplifier (OCL, Mode 8): –54 dB (POUT = 12mW, f = 1kHz)
️· Headphone Amplifier (SE, Mode 8): -72 dB (POUT = 12mW, f = 1kHz)

5. Wake-Up Time

️· Wake-up times seem to vary significantly depending on the capacitor value (CB) and operating mode. These are critical for power saving.
- CB = 4.7μF, OCL: 28 ms
- CB = 2.2μF, Normal Mode: 151 ms
- CB = 2.2μF, OCL: 25 ms
- CB = 4.7μF, Fast Mode: 168 ms

6. Input Impedance (ZIN)

️· Maximum Gain Setting: 12.5 kΩ
️· Maximum Attenuation Setting: 110 kΩ

7. Mute Attenuation (Au(HP))

️· Output Mode 1, 2, and 3: –96 dB

8. Volume Control

️· Step Size Error: ±0.2 dB
️· Maximum Attenuation: -86 dB to -91 dB
️· Maximum Gain: 18 dB

9. Common-Mode Rejection Ratio (CMRR)

️· Speaker (BTL, Mode 1): 61 dB (f = 217Hz, VCM = 1VPP)
️· Headphone (OCL, Mode 4): 66 dB (f = 217Hz, VCM = 1VPP)

Important Considerations & Potential Inconsistencies:

️· Varying Values Across Pages: There are slight differences in values (particularly for Wake-Up Time, PSRR, and Crosstalk) when comparing the data across the provided pages. This could be due to different test conditions or slight variations in the specification. Careful review of the specific datasheet would be needed to reconcile these.
️· Test Conditions: The data is dependent on specific test conditions (e.g., load impedance, THD+N limits, supply voltage).
️· "Normal" vs. "Fast" Modes: The difference between "Normal" and "Fast" operating modes regarding the Wake-Up Time is significant and needs further clarification.

This summary provides a good overview of the LM49120's specifications. It is highly recommended to refer to the complete datasheet for a thorough understanding.