TS4998IQT STMicroelectronics, TS4998IQT Datasheet - Page 22

• Manufacturer Part Number: TS4998IQT
• Description: IC AMP AUDIO PWR 1W STER 16QFN
• Manufacturer: STMicroelectronics
• Type: Class ABr

Specifications of TS4998IQT

• Output Type: 2-Channel (Stereo)
• Max Output Power X Channels @ Load: 1W x 2 @ 8 Ohm
• Voltage - Supply: 2.7 V ~ 5.5 V
• Features: Depop, Differential Inputs, Standby, Thermal Protection
• Mounting Type: Surface Mount
• Package / Case: 16-QFN
• Operational Class: Class-AB
• Audio Amplifier Output Configuration: 2-Channel Stereo
• Output Power (typ): 1x2@8OhmW
• Audio Amplifier Function: Speaker
• Total Harmonic Distortion: 0.5@8Ohm@700mW%
• Single Supply Voltage (typ): 3/5V
• Dual Supply Voltage (typ): Not RequiredV
• Power Supply Requirement: Single
• Unity Gain Bandwidth Product (typ): 1.5MHz
• Rail/rail I/o Type: No
• Power Supply Rejection Ratio: 80dB
• Single Supply Voltage (min): 2.7V
• 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: 16
• Package Type: QFN EP
• For Use With: 497-8259 - BOARD EVAL BASED ON TS4998
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-6842-2

Application information
4.5
22/33
Low frequency response
The input coupling capacitors block the DC part of the input signal at the amplifier inputs. In
the low frequency region, C
pass filter with a -3dB cut-off frequency.
with R
So, for a desired -3dB cut-off frequency we can calculate C
From
for some typical cases.
Figure 64. -3dB lower cut-off frequency vs. input capacitance
Figure
IN
expressed in Ω and C
64, you can easily establish the C
100
10
0.1
IN
Rin=12k
G~12dB
starts to have an effect. C
IN
F
expressed in F.
C
CL
IN
Ω
=
=
0.2
Input Capacitor Cin (
---------------------------------------------- - Hz
2
----------------------------------------------- - F ( )
2
Rin=24k
G~6dB
×
×
π
π
×
×
R
IN
1
R
1
IN
Ω
IN
value required for a -3 dB cut-off frequency
×
×
C
0.4
F
IN
CL
(
IN
Rin=6.2k
G~18dB
μ
F)
and R
)
IN
0.6
:
Tamb=25
IN
Ω
form a first-order high
0.8
°
C
1
TS4998