參數(shù)資料
型號： OPA860
元件分類： 跨導(dǎo)放大器
英文描述： Wide Bandwidth OPERATIONAL TRANSCONDUCTANCE AMPLIFIER (OTA) and BUFFER
中文描述： 寬帶運算跨導(dǎo)放大器（OTA）和緩沖區(qū)
文件頁數(shù)： 16/29頁
文件大?。?/td> 613K
代理商： OPA860
www.ti.com
R
1
160
V
I
V
O
3 B
2
E
C
8
R
E
78
R
500
G = 5V/V
I
Q
= 11.2mA
OTA
100
V
I
V+
V
V
I
V
O
3 B
2
E
C
8
R
S
R
S
R
L
R
E
V
O
R
E
R
L
Inverting Gain
V
OS
= Several Volts
Noninverting Gain
V
OS
= 0V
(a) CommonEmitter Amplifier
Transconductance varies over temperature.
(b) CommonE Amplifier
Transconductance remains constant over temperature.
OTA
g
m_deg
1
1
gm
R
E
(2)
G
R
L
R
E
r
E
r
E
1
g
m
At I
Q
11.2mA
r
E
1
125mA V
8
G
R
L
R
E
8
at I
Q
11.2mA
V
I
V
O
3
2
8
R
E
r
E
R
L2
R
1
100
R
IN
50
R
L
= R
L1
+ R
L2
|| R
IN
OTA
R
L1
Network
Analyzer
OPA860
SBOS331–JUNE 2005
The forward amplifier shown in
Figure 48
and
Fig-
ure 49
corresponds to one of the basic circuits used
to
characterize
the
characterization of this topology appears in the
Typi-
cal Characteristics
section of this datasheet.
OPA860.
Extended
Figure 48. Forward Amplifier Configuration and
Test Circuit
Figure 47. Common-Emitter vs Common-E
Amplifier
The transconductance of the OTA with degeneration
can be calculated by
Equation 2
:
A positive voltage at the B-input, pin 3, causes a
positive current to flow out of the C-input, pin 8.
Figure 47
b shows an amplifier connection of the
OTA, the equivalent of a common-emitter transistor
amplifier. Input and output can be ground-referenced
without any biasing. The amplifier is non-inverting
because of the sense of the output current.
Figure 49. Forward Amplifier Design Equations
16
相關(guān)PDF資料
PDF描述
OPA860ID Wide Bandwidth OPERATIONAL TRANSCONDUCTANCE AMPLIFIER (OTA) and BUFFER
OPA860IDR Wide Bandwidth OPERATIONAL TRANSCONDUCTANCE AMPLIFIER (OTA) and BUFFER
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
OPA860ID 功能描述:跨導(dǎo)放大器 Wide Bandwidth Transconductance RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 封裝 / 箱體:SOIC-14 帶寬: 輸入補償電壓:40 mV at +/- 5 V 電源電壓-最大:+/- 5 V 電源電流: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Tube
OPA860ID 制造商:Texas Instruments 功能描述:TRANSCONDUCTANCE OP-AMP W/BUFFER ((NS))
OPA860IDG4 功能描述:跨導(dǎo)放大器 Wide BW Op Transcon Amp and Buffer RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 封裝 / 箱體:SOIC-14 帶寬: 輸入補償電壓:40 mV at +/- 5 V 電源電壓-最大:+/- 5 V 電源電流: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Tube
OPA860IDR 功能描述:跨導(dǎo)放大器 Wide Bandwidth Transconductance RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 封裝 / 箱體:SOIC-14 帶寬: 輸入補償電壓:40 mV at +/- 5 V 電源電壓-最大:+/- 5 V 電源電流: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Tube
OPA860IDRG4 功能描述:跨導(dǎo)放大器 Wide BW Op Transcon Amp and Buffer RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 封裝 / 箱體:SOIC-14 帶寬: 輸入補償電壓:40 mV at +/- 5 V 電源電壓-最大:+/- 5 V 電源電流: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Tube
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