IC AMP AUDIO PWR .13W STER 8MSOP

TS489IST

Manufacturer Part NumberTS489IST
DescriptionIC AMP AUDIO PWR .13W STER 8MSOP
ManufacturerSTMicroelectronics
TypeClass AB
TS489IST datasheet
 

Specifications of TS489IST

Output TypeHeadphones, 2-Channel (Stereo)Max Output Power X Channels @ Load130mW x 2 @ 16 Ohm
Voltage - Supply2.2 V ~ 5.5 VFeaturesDepop, Short-Circuit Protection, Standby
Mounting TypeSurface MountPackage / Case8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
Operational ClassClass-ABAudio Amplifier Output Configuration2-Channel Stereo
Output Power (typ)130x2@16OhmWAudio Amplifier FunctionHeadphone
Input Offset Voltage20@5VmVSingle Supply Voltage (typ)3/5V
Dual Supply Voltage (typ)Not RequiredVSupply Current (max)2.7@5VmA
Power Supply RequirementSinglePower Dissipation580mW
Unity Gain Bandwidth Product (typ)1.1MHzRail/rail I/o TypeNo
Power Supply Rejection Ratio70dBSingle Supply Voltage (min)2.2V
Single Supply Voltage (max)5.5VDual Supply Voltage (min)Not RequiredV
Dual Supply Voltage (max)Not RequiredVOperating Temp Range-40C to 85C
Operating Temperature ClassificationIndustrialMountingSurface Mount
Pin Count8Package TypeMSOP
For Use With497-6363 - BOARD DEMO FOR TS489Lead Free Status / RoHS StatusLead free / RoHS Compliant
Other names497-6032-2  
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TS488-TS489
4.5
Gain setting
In the flat frequency response region (with no effect from C
is:
The gain A
is:
V
4.6
Decoupling of the circuit
Two capacitors are needed to properly bypass the TS488 (TS489), a power supply capacitor
C
and a bias voltage bypass capacitor C
s
C
has a strong influence on the THD+N in the high frequency range (above 7kHz) and
s
indirectly on the power supply disturbances. With 1µF, you can expect THD+N performance
to be similar to the one shown in the datasheet. If C
increases in the higher frequencies and disturbances on the power supply rail are less
filtered. On the contrary, if C
are more filtered.
C
has an influence on the THD+N in the low frequency range. Its value is critical on the
b
PSRR with grounded inputs in the lower frequencies:
If C
is lower than 1µF, the THD+N improves and the PSRR worsens.
b
If C
is higher than 1µF, the benefit on the THD+N and PSRR is small.
b
Note:
The input capacitor C
lower the value of C
4.7
Standby mode
When the standby mode is activated an internal circuit of the TS488 (TS489) is charged
(see
Figure
82). A time required to change the internal circuit is a few microseconds.
Figure 82. Internal equivalent schematic of the TS488 (TS489) in standby mode
R
feed
V
=
V
– ⎝
------------- -
OUT
IN
R
in
R
feed
A
=
------------- -
V
R
in
.
b
is higher than 1µF, the disturbances on the power supply rail
s
also has a significant effect on the PSRR at lower frequencies. The
in
, the higher the PSRR.
in
TS488/9
Vin1
25K
BYPASS
25K
Vin2
Application information
, C
, C
), the output voltage
in
out
feed
=
V
A
IN
V
is lower than 1µF, the THD+N
s
Vout1
600K
GND
600K
Vout2
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