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參數(shù)資料
| 型號(hào)： | OPA860IDR |
| 元件分類(lèi)： | 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(yùn)算跨導(dǎo)放大器（OTA）和緩沖區(qū) |
| 文件頁(yè)數(shù)： | 16/29頁(yè) |
| 文件大?。?/td> | 613K |
| 代理商： | OPA860IDR |
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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
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| 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(bǔ)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 |
| OPA861 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Wide Bandwidth OPERATIONAL TRANSCONDUCTANCE AMPLIFIER (OTA) |
| OPA861ID | 功能描述:跨導(dǎo)放大器 Wide Bandwidth Oper 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(bǔ)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 |
| OPA861IDBVR | 功能描述:跨導(dǎo)放大器 Wide Bandwidth Oper 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(bǔ)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 |
| OPA861IDBVRG4 | 功能描述:跨導(dǎo)放大器 Wide BW Op Transconductance Amp RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 封裝 / 箱體:SOIC-14 帶寬: 輸入補(bǔ)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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