TS4994IST STMicroelectronics, TS4994IST Datasheet - Page 24

• Manufacturer Part Number: TS4994IST
• Description: IC AMP AUDIO PWR 1W MONO 8MSOP
• Manufacturer: STMicroelectronics
• Type: Class ABr

Specifications of TS4994IST

• Output Type: 1-Channel (Mono)
• Max Output Power X Channels @ Load: 1W x 1 @ 8 Ohm
• Voltage - Supply: 2.5 V ~ 5.5 V
• Features: Depop, Differential Inputs, Short-Circuit and Thermal Protection, Standby
• Mounting Type: Surface Mount
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• For Use With: 497-6396 - BOARD EVAL FOR LV TS4984IQT497-6395 - BOARD EVAL FOR LP DIFF TS4994IQT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-4452-2

Application information
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Figure 70. PSRR vs. frequency (worst case
Figure 72. PSRR vs. frequency (worst case
-100
-110
-120
-130
-140
-100
-110
-120
-130
-140
-10
-20
-30
-40
-50
-60
-70
-80
-90
-10
-20
-30
-40
-50
-60
-70
-80
-90
0
0
20
20
Vcc = 5V, Vripple = 200mVpp
Av = 1, Cin = 4.7 μ F
Δ R/R = 0.1%, RL ≥ 8 Ω
Tamb = 25 ° C, Inputs = Grounded
Vcc = 2.5V, Vripple = 200mVpp
Av = 1, Cin = 4.7 μ F
Δ R/R = 0.1%, RL ≥ 8 Ω
Tamb = 25 ° C, Inputs = Grounded
The three following graphs show PSRR versus frequency and versus bypass capacitor C
worst-case conditions (
conditions)
conditions)
Cb=1 μ F
Cb=1 μ F
100
100
Cb=0.1 μ F
Cb=0.1 μ F
Cb=0.47 μ F
Cb=0.47 μ F
Frequency (Hz)
Frequency (Hz)
1000
1000
Δ
R = 0.1%).
Cb=0
Cb=0
10000
10000
20k
20k
Figure 71. PSRR vs. frequency (worst case
-100
-110
-120
-130
-140
-10
-20
-30
-40
-50
-60
-70
-80
-90
0
20
Vcc = 3.3V, Vripple = 200mVpp
Av = 1, Cin = 4.7 μ F
Δ R/R = 0.1%, RL ≥ 8 Ω
Tamb = 25 ° C, Inputs = Grounded
conditions)
Cb=1 μ F
100
Cb=0.1 μ F
Cb=0.47 μ F
Frequency (Hz)
1000
Cb=0
10000
TS4994
20k
b
in