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參數(shù)資料
| 型號： | OPA832ID |
| 英文描述： | Low-Power, Single-Supply, Fixed-Gain Video Buffer Amplifier |
| 中文描述： | 低功耗，單電源，固定增益視頻緩沖放大器 |
| 文件頁數(shù)： | 14/26頁 |
| 文件大?。?/td> | 471K |
| 代理商： | OPA832ID |
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SBOS266B JUNE 2003 REVISED SEPTEMBER 2004
APPLICATIONS INFORMATION
WIDEBAND VOLTAGE-FEEDBACK
OPERATION
The OPA832 is a fixed-gain, high-speed, voltage-
feedback op amp designed for single-supply operation
(+3V to +10V). It features internal R
F
and R
G
resistors
which make it easy to select a gain of +2, +1, and 1
without external resistors.The input stage supports input
voltages below ground and to within 1.7V of the positive
supply. The complementary common-emitter output stage
provides an output swing to within 25mV of either supply
pin. The OPA832 is compensated to provide stable
operation with a wide range of resistive loads.
www.ti.com
14
Figure 1 shows the AC-coupled, gain of +2 configuration
used for the +5V Specifications and Typical Characteristic
Curves. The input impedance matching resistor (66.5
)
used for testing is adjusted to give a 50
input match when
the parallel combination of the biasing divider network is
included. Voltage swings reported in the Electrical
Characteristics are taken directly at the input and output
pins. For the circuit of Figure 1, the total effective load on
the output at high frequencies is 150
|| 800
. The 332
and 499
resistors at the noninverting input provide the
common-mode bias voltage. Their parallel combination
equals the DC resistance at the inverting input (R
F
R
G
),
reducing the DC output offset due to input bias current.
OPA832
V
S
= +5V
V
OUT
66.5
V
IN
499
V
CM
= 2V
332
R
L
150
V
CM
= 2V
V
CM
= 2V
6.8
μ
F
+
0.1
μ
F
0.1
μ
F
R
F
400
R
G
400
Figure 1. AC-Coupled, G = +2, +5V Single-Supply
Specification and Test Circuit
Figure 2 shows the AC-coupled, gain of +2 configuration
used for the +3.3V Specifications and Typical
Characteristic Curves. The input impedance matching
resistor (66.5
) used for testing is adjusted to give a 50
input match when the parallel combination of the biasing
divider network is included. Voltage swings reported in the
Electrical Characteristics are taken directly at the input
and output pins. For the circuit of Figure 2, the total
effective load on the output at high frequencies is
150
|| 800
. The 887
and 258
resistors at the
noninverting input provide the common-mode bias
voltage. Their parallel combination equals the DC
resistance at the inverting input (R
F
R
G
), reducing the
DC output offset due to input bias current.
OPA832
V
S
= +3.3V
V
OUT
66.5
V
IN
887
V
CM
= 0.75V
258
R
L
150
V
CM
= 0.75V
V
CM
= 0.75V
6.8
μ
F
+
0.1
μ
F
0.1
μ
F
R
F
400
R
G
400
Figure 2. AC-Coupled, G = +2, +3.3V
Single-Supply Specification and Test Circuit
Figure 3 shows the DC-coupled, gain of +2, dual
power-supply circuit configuration used as the basis of the
±
5V Electrical Characteristics and Typical Characteristics.
For test purposes, the input impedance is set to 50
with
a resistor to ground and the output impedance is set to 50
with a series output resistor. Voltage swings reported in the
specifications are taken directly at the input and output
pins. For the circuit of Figure 3, the total effective load will
be 150
|| 800
. Two optional components are included
in Figure 3. An additional resistor (175
) is included in
series with the noninverting input. Combined with the 25
DC source resistance looking back towards the signal
generator, this gives an input bias current cancelling
resistance that matches the 200
source resistance seen
at the inverting input (see the
DC Accuracy and Offset
Control
section). In addition to the usual power-supply
decoupling capacitors to ground, a 0.01
μ
F capacitor is
included between the two power-supply pins. In practical
PC board layouts, this optionally-added capacitor will
typically improve the 2nd-harmonic distortion performance
by 3dB to 6dB.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| OPA832IDBVR | 功能描述:視頻放大器 Lo-Pwr Single-Supply Fixed-Gain Video Bfr RoHS:否 制造商:ON Semiconductor 通道數(shù)量:4 電源類型: 工作電源電壓:3.3 V, 5 V 電源電流: 最小工作溫度: 最大工作溫度: 封裝 / 箱體:TSSOP-14 封裝:Reel |
| OPA832IDBVRG4 | 功能描述:視頻放大器 Lo-Pwr Single-Supply Fixed-Gain Video Bfr RoHS:否 制造商:ON Semiconductor 通道數(shù)量:4 電源類型: 工作電源電壓:3.3 V, 5 V 電源電流: 最小工作溫度: 最大工作溫度: 封裝 / 箱體:TSSOP-14 封裝:Reel |
| OPA832IDBVT | 功能描述:視頻放大器 Lo-Pwr Single-Supply Fixed-Gain Video Bfr RoHS:否 制造商:ON Semiconductor 通道數(shù)量:4 電源類型: 工作電源電壓:3.3 V, 5 V 電源電流: 最小工作溫度: 最大工作溫度: 封裝 / 箱體:TSSOP-14 封裝:Reel |
| OPA832IDBVTG4 | 功能描述:視頻放大器 Lo-Pwr Single-Supply Fixed-Gain Video Bfr RoHS:否 制造商:ON Semiconductor 通道數(shù)量:4 電源類型: 工作電源電壓:3.3 V, 5 V 電源電流: 最小工作溫度: 最大工作溫度: 封裝 / 箱體:TSSOP-14 封裝:Reel |
| OPA832IDG4 | 功能描述:視頻放大器 Lo-Pwr Single-Supply Fixed-Gain Video Bfr RoHS:否 制造商:ON Semiconductor 通道數(shù)量:4 電源類型: 工作電源電壓:3.3 V, 5 V 電源電流: 最小工作溫度: 最大工作溫度: 封裝 / 箱體:TSSOP-14 封裝:Reel |
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