TS489IST STMicroelectronics, TS489IST Datasheet - Page 25

• Manufacturer Part Number: TS489IST
• Description: IC AMP AUDIO PWR .13W STER 8MSOP
• Manufacturer: STMicroelectronics
• Type: Class ABr

Specifications of TS489IST

• Output Type: Headphones, 2-Channel (Stereo)
• Max Output Power X Channels @ Load: 130mW x 2 @ 16 Ohm
• Voltage - Supply: 2.2 V ~ 5.5 V
• Features: Depop, Short-Circuit Protection, Standby
• Mounting Type: Surface Mount
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• Operational Class: Class-AB
• Audio Amplifier Output Configuration: 2-Channel Stereo
• Output Power (typ): 130x2@16OhmW
• Audio Amplifier Function: Headphone
• Input Offset Voltage: 20@5VmV
• Single Supply Voltage (typ): 3/5V
• Dual Supply Voltage (typ): Not RequiredV
• Supply Current (max): 2.7@5VmA
• Power Supply Requirement: Single
• Power Dissipation: 580mW
• Unity Gain Bandwidth Product (typ): 1.1MHz
• Rail/rail I/o Type: No
• Power Supply Rejection Ratio: 70dB
• Single Supply Voltage (min): 2.2V
• Single Supply Voltage (max): 5.5V
• Dual Supply Voltage (min): Not RequiredV
• Dual Supply Voltage (max): Not RequiredV
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 8
• Package Type: MSOP
• For Use With: 497-6363 - BOARD DEMO FOR TS489
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-6032-2

TS488-TS489
4.5
4.6
Note:
4.7
Gain setting
In the flat frequency response region (with no effect from C
is:
The gain A
Decoupling of the circuit
Two capacitors are needed to properly bypass the TS488 (TS489), a power supply capacitor
C
C
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
PSRR with grounded inputs in the lower frequencies:
■
■
The input capacitor C
lower the value of C
Standby mode
When the standby mode is activated an internal circuit of the TS488 (TS489) is charged
(see
Figure 82. Internal equivalent schematic of the TS488 (TS489) in standby mode
s
s
b
and a bias voltage bypass capacitor C
has a strong influence on the THD+N in the high frequency range (above 7kHz) and
If C
If C
has an influence on the THD+N in the low frequency range. Its value is critical on the
Figure
b
b
is lower than 1µF, the THD+N improves and the PSRR worsens.
is higher than 1µF, the benefit on the THD+N and PSRR is small.
V
82). A time required to change the internal circuit is a few microseconds.
is:
in
BYPASS
Vin1
Vin2
, the higher the PSRR.
in
also has a significant effect on the PSRR at lower frequencies. The
s
V
is higher than 1µF, the disturbances on the power supply rail
OUT
TS488/9
=
V
IN
A
⋅
V
b
.
⎛
– ⎝
=
25K
25K
R
------------- -
–
R
feed
R
------------- -
in
R
feed
in
⎞
⎠
s
=
is lower than 1µF, the THD+N
V
600K
600K
IN
⋅
in
, C
A
V
out
, C
GND
Vout1
Vout2
Application information
feed
), the output voltage
25/32