| TS4975 - Stereo headphone driver with I2C bus control |
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| Datasheet | Orderable
Products | Features and Description
| Technical Documents | Related Documents
| Downloads | Development
Tools |
| |
| Datasheet |
| Reference |
Filesize |
Pages |
Last Updated |
| TS4975 |
795KB |
36 |
02/12/2005 |
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| Orderable Products |
| Device |
Status |
RoHS |
Package |
Purchase |
| TS4975EIJT |
Active |
Converted |
Flip-Chip12 |
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| Features and Description |
The TS4975 is a stereo headphone driver tailor-made
for the new 3G generation of mobile phones.
High quality stereo sound is a key feature of mobile
phones that seek to offer not only communication,
but also entertainment features.
Made to be mobile
The TS4975 is a compact stereo headphone driver intended for
portable applications such as high-end mobile phones, MP3 players,
PDAs and laptop computers that require quality audio output,
extreme power efficiency, and minimum additional components.
Recently designed-in by a major handset manufacturer to enable
FM radio reception, this device is capable of delivering up
to 40mW per channel continuous average power into 16Ω loads
on a 3.3V power supply.
Nine operating modes
An integrated I2C interface allows one to digitally
control the volume from the central processor, in 14-steps ranging
from 18dB to -34dB. The I2C interface also controls
nine operating modes, which include various combinations of
input and output switching, plus independent channel shutdown.
As the device is intended for portable applications where space
for both electronics and for manual controls is limited, volume
control is achieved more efficiently through the MCU.
Capless audio outputs
In addition to the traditional single-ended output configuration,
the TS4975 can also be used in a phantom ground configuration
which allows the removal of bulky output capacitors. In the
phantom ground configuration, internal buffers are connected
to the output pins DC-biased to Vcc/2, and the output amplifiers
are also biased to Vcc/2. This means that when the headphone
jack is connected to the PHG output, no net DC current will
flow through the the speaker. In this configuration, the headphone's
jack cannot be connected to ground.
The TS4975 is available in a tiny 1.8mm x 2.3mm 12-bump Flip-Chip
package, ideal for space-critical applications.
TS4975 in single-ended configuration
TS4975 in phantom ground configuration
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| Technical Documents (PDF Files) |
| Datasheet |
| Reference |
Filesize |
Pages |
Last Updated |
| TS4975 |
795KB |
36 |
02/12/2005 |
|
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