LM48822TLEVAL National Semiconductor, LM48822TLEVAL Datasheet - Page 11

• Manufacturer Part Number: LM48822TLEVAL
• Description: BOARD EVAL FOR LM48822TL
• Manufacturer: National Semiconductor
• Series: Boomer®r

Specifications of LM48822TLEVAL

• Amplifier Type: Class AB
• Output Type: Headphones, 2-Channel (Stereo)
• Max Output Power X Channels @ Load: 40mW x 2 @ 32 Ohm
• Voltage - Supply: 2.4 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Board Type: Fully Populated
• Utilized Ic / Part: LM48822
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

COMMON MODE SENSE
The LM48822 features a ground (common mode) sensing
feature. In noisy applications, or where the headphone jack is
used as a line out to other devices, noise pick up and ground
imbalance can degrade audio quality. The LM48822 COM in-
put senses and corrects any noise at the headphone return,
FIGURE 5. Back-Driving the LM48822 Outputs
FIGURE 6. COM Connection Example
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or any ground imbalance between the headphone return and
device ground, improving audio reproduction. Connect COM
directly to the headphone return terminal of the headphone
jack
quired. Connect COM to GND if the common-mode sense
feature is not in use.
Figure
6. No additional external components are re-
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