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參數(shù)資料
| 型號： | INA163UA |
| 元件分類： | 測量放大器 |
| 英文描述： | Precision Instrumentation Amplifier |
| 中文描述： | 精密儀表放大器 |
| 文件頁數(shù)： | 8/11頁 |
| 文件大小： | 250K |
| 代理商： | INA163UA |
INA163
SBOS177B
8
www.ti.com
R
2.2k
R
6(2)
5
R
7(3)
1k
A
INA163
+
47
m
F
R
3
47k
R
6.8k
R
1
6.8k
Phantom Power
+48V
+
+
R
2.2k
C
1(1)
47
m
F
60V
C
2(1)
47
m
F
60V
A
OPA134
0.1
m
F
+15V
0.1
m
F
0.1
m
F
1M
V
O
-
15V
Optional DC
output control loop.
8
9
10
1
2
3
Female XLR
Connector
NOTES: (1) Use non- polar capacitors if phantom
power is to be turned off. (2) R
6
sets maximum gain.
(3) R
7
sets minimum gain.
1N4148
FIGURE 5. Phantom-Powered Microphone Preamplifier.
MICROPHONE AMPLIFIER
Figure 5 shows a typical circuit for a professional
microphone input amplifier. R
1
and R
2
provide a cur-
rent path for conventional 48V phantom power source
for a remotely located microphone. An optional switch
allows phantom power to be disabled. C
1
and C
2
block
the phantom power voltage from the INA163 input
circuitry. Non-polarized capacitors should be used for
C
1
and C
2
if phantom power is to be disabled.
R
4
and R
5
provide a path for input bias current of the
INA163. Input offset current (typically 100nA) creates a
DC differential input voltage that will produce an output
offset voltage. This is generally the dominant source of
output offset voltage in this application. With a maxi-
mum gain of 1000 (60dB), the output offset voltage can
be several volts. This may be entirely acceptable if the
output is AC-coupled into the subsequent stage. An
alternate technique is shown in Figure 5. An inexpen-
sive FET-input op amp in a feedback loop drives the
DC output voltage to 0V. A
2
is not in the audio signal
path and does not affect signal quality.
Gain is set with a variable resistor, R
7
, in series with
R
6
. R
6
determines the maximum gain. The total resis-
tance, R
6
+ R
7
, determines the lowest gain. A special
reverse-log taper potentiometer for R
7
can be used to
create a linear change (in dB) with rotation.
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| INA163UA/2K5 | 功能描述:儀表放大器 Low-Noise Low-Distortion RoHS:否 制造商:Texas Instruments 通道數(shù)量: 輸入補償電壓:150 V 可用增益調(diào)整: 最大輸入電阻:10 kOhms 共模抑制比（最小值）:88 dB 工作電源電壓:2.7 V to 36 V 電源電流:200 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:MSOP-8 封裝:Bulk |
| INA163UA/2K5E4 | 功能描述:儀表放大器 Low-Noise Low-Distortion RoHS:否 制造商:Texas Instruments 通道數(shù)量: 輸入補償電壓:150 V 可用增益調(diào)整: 最大輸入電阻:10 kOhms 共模抑制比（最小值）:88 dB 工作電源電壓:2.7 V to 36 V 電源電流:200 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:MSOP-8 封裝:Bulk |
| INA163UAE4 | 功能描述:儀表放大器 Low-Noise Low-Distortion RoHS:否 制造商:Texas Instruments 通道數(shù)量: 輸入補償電壓:150 V 可用增益調(diào)整: 最大輸入電阻:10 kOhms 共模抑制比（最小值）:88 dB 工作電源電壓:2.7 V to 36 V 電源電流:200 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:MSOP-8 封裝:Bulk |
| INA1650EVM | 功能描述:EVALUATION MODULE 制造商:texas instruments 系列:* 零件狀態(tài):在售 標準包裝:1 |
| INA1650IPW | 功能描述:IC AUDIO RECEIVER 91DB 14TSSOP 制造商:texas instruments 系列:SoundPlus?? 包裝:管件 零件狀態(tài):在售 功能:音頻接收器 應(yīng)用:音頻 通道數(shù):2 接口:- 電壓 - 電源:4.5 V ~ 36 V 工作溫度:-40°C ~ 125°C（TA） 規(guī)格:- 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商器件封裝:14-TSSOP 標準包裝:90 |
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