LM48821 Datasheet, PDF (14/24 Pages) National Semiconductor (TI) – Direct Coupled, Ultra Low Noise, 52mW Differential Input Stereo Headphone Amplifier with I2C Volume Control

LM48821, LM48821TLEVAL
SNAS354A – JUNE 2007 – REVISED MAY 2013
www.ti.com
Typical Performance Characteristics (continued)
Output Power vs Power Dissipation
V_DD = 2V, 3V, 4V, R_L = 32Ω, Mono
0.45
Output Power vs Power Dissipation
0.45^{VDD = 2V, 3V, 4V, RL = 16Ω, Stereo}
0.40
0.35
0.40
0.35
THD=1%
THD=10%
VDD=4V
0.30
0.30
0.25
0.20
0.25
0.20
VDD=3V
0.15
THD=1% _THD=10%
0.10
VDD=4V
0.05
VDD=3V
VDD=2V
0.00
0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35
0.15
0.10
0.05
VDD=2V
0.00
0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35
MONOPHONIC OUTPUT POWER (W)
Figure 51.
TOTAL STEREO OUTPUT POWER (W)
Figure 52.
Output Power vs Power Dissipation
V_DD = 2V, 3V, 4V, R_L = 32Ω, Stereo
0.45
0.40
0.35
0.30
0.25
THD=1%
THD=10%
0.20
0.15
VDD=4V
0.10
VDD=3V
0.05
VDD=2V
0.00
0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35
TOTAL STEREO OUTPUT POWER (W)
Figure 53.
Supply Current vs Supply Voltage
Mono
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
1.5 2.0 2.5 3.0 3.5 4.0 4.5
POWER SUPPLY VOLTAGE (V)
Figure 54.
Supply Current vs Supply Voltage
Stereo
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
1.5 2.0 2.5 3.0 3.5 4.0 4.5
POWER SUPPLY VOLTAGE (V)
Figure 55.
14
Submit Documentation Feedback
Copyright © 2007–2013, Texas Instruments Incorporated
Product Folder Links: LM48821 LM48821TLEVAL