TDA7498LTR STMicroelectronics, TDA7498LTR Datasheet - Page 20

• Manufacturer Part Number: TDA7498LTR
• Description: Audio Amplifiers 80W and 80W Dual BTL Class-D Audio Amp
• Manufacturer: STMicroelectronics

Specifications of TDA7498LTR

• Product Category: Audio Amplifiers
• Rohs: yes
• Product: Class-D
• Output Type: Dual
• Output Power: 80 W
• Thd Plus Noise: 10 %
• Operating Supply Voltage: 44 V
• Supply Current: 40 mA
• Maximum Power Dissipation: 16 W
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: PowerSSO-36
• Available Set Gain: 25.6 dB, 31.6 dB, 35.1 dB, 37.6 dB
• Input Signal Type: Differential
• Minimum Operating Temperature: - 40 C

Applications information
5.3
5.4
20/27
Gain setting
The gain of the TDA7498L is set by the two inputs, GAIN0 (pin 30) and GAIN1 (pin 31).
Internally, the gain is set by changing the feedback resistors of the amplifier.
Table 8.
Input resistance and capacitance
The input impedance is set by an internal resistor Ri = 60 kΩ (typical). An input capacitor
(Ci) is required to couple the AC input signal.
The equivalent circuit and frequency response of the input components are shown in
Figure
Figure 23. Input circuit and frequency response
L
L
H
H
f
C
23. For Ci = 470 nF the high-pass filter cutoff frequency is below 20 Hz:
= 1 / (2 * π * Ri * Ci)
GAIN0
Gain settings
Input
signal
Ci
Doc ID 16504 Rev 3
L
H
L
H
Input
pin
Ri
GAIN1
Rf
25.6
31.6
35.6
37.6
Nominal gain, G
TDA7498L
v
(dB)