- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄374675 > SA572DR2G (ON SEMICONDUCTOR) Programmable Analog Compandor PDF資料下載
參數(shù)資料
| 型號(hào)： | SA572DR2G |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | Programmable Analog Compandor |
| 中文描述： | DUAL COMPANDER, PDSO16 |
| 封裝： | LEAD FREE, PLASTIC, SOIC-16 |
| 文件頁數(shù)： | 5/12頁 |
| 文件大小： | 224K |
| 代理商： | SA572DR2G |
SA572
http://onsemi.com
5
The residual distortion is third harmonic distortion and
is caused by gain control ripple. In a compandor system,
available control of fast attack and slow recovery improve
ripple distortion significantly. At the unity gain level of
100 mV, the gain cell gives THD (total harmonic
distortion) of 0.17% typ. Output noise with no input signals
is only 6.0 V in the audio spectrum (10 Hz-20 kHz). The
output current I
O
must feed the virtual ground input of an
operational amplifier with a resistor from output to
inverting input. The non-inverting input of the operational
amplifier has to be biased at V
REF
if the output current I
O
is DC coupled.
V
REF
THD
TRIM
V+
1
2
IG
1
2
IO
I
1
140 A
280 A
I
2
I
G
I
O
Q
4
Q
3
Q
1
Q
2
V
IN
+
A1
Figure 3. Basic Gain Cell Schematic
R
1
6.8k
Rectifier
The rectifier is a full-wave design as shown in Figure 4.
The input voltage is converted to current through the input
resistor R
2
and turns on either Q
5
or Q
6
depending on the
signal polarity. Deadband of the voltage to current
converter is reduced by the loop gain of the gain block A
2
.
If AC coupling is used, the rectifier error comes only from
input bias current of gain block A
2
. The input bias current
is typically about 70 nA. Frequency response of the gain
block A
2
also causes second-order error at high frequency.
The collector current of Q
6
is mirrored and summed at the
collector of Q
5
to form the full wave rectified output
current I
R
. The rectifier transfer function is:
V
IN
I
R
V
REF
R
2
(eq. 3)
If V
IN
is AC-coupled, then the equation will be reduced
to:
V
IN
(AVG)
I
RAC
R
2
The internal bias scheme limits the maximum output
current I
R
to be around 300 A. Within a
band the input range of the rectifier is about 52 dB.
1.0 dB error
V
IN
V
REF
V+
A2
+
IR
VIN
VREF
R2
Figure 4. Simplified Rectifier Schematic
Q
5
Q
6
R
2
D
7
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SA572DTB | Programmable Analog Compandor |
| SA572DTBG | Programmable Analog Compandor |
| SA572DTBR2 | Programmable Analog Compandor |
| SA572DTBR2G | Programmable Analog Compandor |
| SA572NG | Programmable Analog Compandor |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SA572DTB | 功能描述:音頻放大器 Dual Channel Hi Perf 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 |
| SA572DTBG | 功能描述:音頻放大器 ANA COMPANDOR DUAL CHANEL 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 |
| SA572DTBR2 | 功能描述:音頻放大器 Dual Channel Hi Perf 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 |
| SA572DTBR2G | 功能描述:音頻放大器 ANA COMPANDOR DUAL CHANEL 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 |
| SA572F | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Programmable analog compandor |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。