TS4994IST STMicroelectronics, TS4994IST Datasheet - Page 25

IC AMP AUDIO PWR 1W MONO 8MSOP

TS4994IST

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

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

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
TS4994IST
Manufacturer:
ST
0
Part Number:
TS4994IST
Manufacturer:
ST
Quantity:
20 000
TS4994
4.6
Figure 73. PSRR vs. frequency with random
-100
-110
-120
-130
-140
-10
-20
-30
-40
-50
-60
-70
-80
-90
0
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
The two following graphs show typical applications of the TS4994 with a random selection of
four
CMRR performance
For calculating CMRR performance, we consider that C
has no influence in the calculation of the CMRR.
We use the same kind of resistor (same tolerance) and ΔR is the tolerance value in %.
The following CMRR equation is valid for frequencies ranging from DC to about 1kHz.
The CMRR equation is (ΔR in %):
Example: With ΔR = 1%, the minimum CMRR is -34dB.
This example is a worst case scenario where each resistor has extreme tolerance. Ut
illustrates the fact that for CMRR, good matching is essential.
As with the PSRR, due to self-generated noise, the TS4994 CMRR limitation is about
-110dB.
Figure 75
worst-case conditions (ΔR=0.1%).
choice condition
Cb=1 μ F
100
Δ
R/R values with a 0.1% tolerance.
Cb=0.1 μ F
and
Cb=0.47 μ F
Frequency (Hz)
Figure 76
1000
Cb=0
show CMRR versus frequency and versus bypass capacitor C
CMRR
10000
20k
20
×
Log
Figure 74. PSRR vs. frequency with random
(
-100
-110
-120
-130
-140
10000
-10
-20
-30
-40
-50
-60
-70
-80
-90
0
Δ
20
R
×
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
200
choice condition
Δ
Cb=1 μ F
R
in
100
2
)
and C
Cb=0.1 μ F
(
dB
Cb=0.47 μ F
Frequency (Hz)
feed
)
Application information
have no influence. C
1000
Cb=0
10000
20k
25/35
b
b
in

Related parts for TS4994IST