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參數(shù)資料
型號(hào)： TS4994EIJT
廠商： STMICROELECTRONICS
元件分類： 音頻／視頻放大
英文描述： 1.2 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA9
封裝： ROHS COMPLIANT, FCP-9
文件頁(yè)數(shù)： 20/35頁(yè)
文件大小： 694K
代理商： TS4994EIJT
TS4994FC
Application information
27/35
The two following graphs show typical applications of the TS4994 with a random selection of
four
ΔR/R values with a 0.1% tolerance.
4.6
CMRR performance
For calculating CMRR performance, we consider that Cin and Cfeed have no influence. Cb
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 94 and Figure 95 show CMRR versus frequency and versus bypass capacitor Cb in
worst-case conditions (
ΔR=0.1%).
Figure 92.
PSRR vs. frequency with random
choice condition
Figure 93.
PSRR vs. frequency with random
choice condition
100
1000
10000
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
Cb=0.1
μF
Cb=1
μF
Cb=0
20k
20
Cb=0.47
μF
Vcc = 5V, Vripple = 200mVpp
Av = 1, Cin = 4.7
μF
ΔR/R ≤ 0.1%, RL ≥ 8Ω
Tamb = 25
°C, Inputs = Grounded
PSRR
(
d
B)
Frequency (Hz)
100
1000
10000
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
Cb=0.1
μF
Cb=1
μF
Cb=0
20k
20
Cb=0.47
μF
Vcc = 2.5V, Vripple = 200mVpp
Av = 1, Cin = 4.7
μF
ΔR/R ≤ 0.1%, RL ≥ 8Ω
Tamb = 25
°C, Inputs = Grounded
PSRR
(
d
B)
Frequency (Hz)
)
dB
(
)
R
10000
(
200
R
Log
20
CMRR
2
Δ
×
Δ
×
≤
相關(guān)PDF資料
PDF描述
TS4994EIKJT 1.2 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA9
TS4994IQT 1 W, 1 CHANNEL, AUDIO AMPLIFIER, DSO8
TS4994IST 1 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8
TS4995EIJT 1.2 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA9
TS4998IQT 1 W, 2 CHANNEL, AUDIO AMPLIFIER, QCC16
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TS4994EIKJT 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:1.2 W differential input/output audio power amplifier with selectable standby
TS4994FC 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:1.2 W differential input/output audio power amplifier with selectable standby
TS4994IJT 功能描述:音頻放大器 STANDARD LINEAR RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
TS4994IQT 功能描述:音頻放大器 1W diff input/output audio Pwr amplifier RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
TS4994IST 功能描述:音頻放大器 1W Audio Power Amp RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
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