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參數(shù)資料
| 型號： | THAT1240 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Balanced Line Receiver ICs |
| 中文描述： | 平衡線接收器 |
| 文件頁數(shù)： | 5/8頁 |
| 文件大小： | 111K |
| 代理商： | THAT1240 |
Since R3=R4 in the THAT 1240, this equation
can be simplified to
a
In
R
(
)
2
ef
The output voltage would then be
Vout
a
R
R
(
1
)
2
1
Since R2=R1, combining equations results in
Vout
In
(
R
)
ef
Figure 6 shows a convenient method of driving a
typical audio ADC with balanced inputs. This circuit
accepts
+24
dBu
in,
THAT 1246s, the signal level between their respective
outputs is +24 dBu.
An attenuator network brings
the signal down another 24 dB while attenuating the
noise of the line receivers as well.
and
using
a
pair
of
The output noise of a THAT 1246 is -109 dBu,
and since there are two of them, the total noise level
going into the resistive pad will be -106 dBu.
pad reduces the noise level to -130 dBu at the input
to the ADC. The noise density resulting from the line
receivers will therefore be
The
THAT Corporation; 45 Sumner Street; Milford, Massachusetts 01757-1656; USA
Tel: +1 (508) 478-9200; Fax: +1 (508) 478-0990; Web: www.thatcorp.com
Rev. 04/29/02
Preliminary Information
Page 5
In Hi
In Lo
AIN- to ADC
AIN+ to ADC
R8
2k10
R9
249R
R19
2k10
C4
6n8
+24 dBu In
Vout
6
In+
3
In-
2
U1
THAT
1246
Vout
6
In+
3
In-
2
U2
THAT
1246
3
2
1
U3A
4570
1/2 Vref of ADC
+24 dBu
Zero dBu Out
Ref
Sense
5
1
Ref
Sense
5
1
Figure 6. Circuit for audio ADCs with balanced inputs
Vout
6
In+
3
In-
2
U1
1243
In Hi
In Lo
Out Hi
Out Lo
In
4
Gnd
3
Out-
1
Out+
8
U2
THAT1430
C1
100n
R1
1M0
R2
20k0
R4
5k1
R3
14k0
C2
22u
C3
22p
IN
1
8
OUT
U3
2180B
3
2
1
U4A
4570
VEE
VCC
VCC
VEE
Control Voltage
-3dB
+6dB
Vee
Cap2
Vcc
Cap1
6
7
2
5
GND
EC-
EC+
SYM
V-
V+
5
6
3
2
4
7
Sense
Ref
5
1
-3dB
Figure 7. Automated gain control of a balanced signal
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| THAT1243 | Balanced Line Receiver ICs |
| THAT1246 | Balanced Line Receiver ICs |
| THAT1420 | Balanced Line Drivers |
| THAT1430 | Balanced Line Drivers |
| THAT1510 | Low Noise, High Performance Microphone Preamplifier IC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| THAT1240P08-U | 制造商:THAT CORPORATION 功能描述:LINE RECEIVER BALANCED 1240 DIP8 制造商:THAT CORPORATION 功能描述:LINE RECEIVER, BALANCED, 1240, DIP8 制造商:THAT CORPORATION 功能描述:LINE RECEIVER, BALANCED, 1240, DIP8; Device Type:Differential; Supply Voltage Min:6V; Supply Voltage Max:36V; Driver Case Style:DIP; No. of Pins:8; Operating Temperature Min:0C; Operating Temperature Max:85C; Bandwidth:8.6MHz; Base;RoHS Compliant: Yes |
| THAT1240S08-U | 制造商:THAT CORPORATION 功能描述:LINE RECEIVER BALANCED 1240 SO-8 |
| THAT1243 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Balanced Line Receiver ICs |
| THAT1246 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Balanced Line Receiver ICs |
| THAT1246P08-U | 制造商:THAT CORPORATION 功能描述:LINE RECEIVER BALANCED 1246 DIP8 制造商:THAT CORPORATION 功能描述:LINE RECEIVER, BALANCED, 1246, DIP8 制造商:THAT CORPORATION 功能描述:LINE RECEIVER, BALANCED, 1246, DIP8; Device Type:Differential; Supply Voltage Min:6V; Supply Voltage Max:36V; Driver Case Style:DIP; No. of Pins:8; Operating Temperature Min:0C; Operating Temperature Max:85C; Bandwidth:8.6MHz; Base;RoHS Compliant: Yes |
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