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參數(shù)資料
| 型號： | OPA683IDBVT |
| 元件分類： | 運(yùn)動控制電子 |
| 英文描述： | OP-AMP|SINGLE|BIPOLAR|TSOP|6PIN|PLASTIC |
| 中文描述： | 運(yùn)放|單|雙極|的TSOP | 6針|塑料 |
| 文件頁數(shù)： | 13/24頁 |
| 文件大?。?/td> | 400K |
| 代理商： | OPA683IDBVT |
OPA683
SBOS221B
13
www.ti.com
into this midpoint voltage bias. The input voltage can swing
to within 1.25V of either supply pin, giving a 2.5Vp-p input
signal range centered between the supply pins. The input
impedance of Figure 3 is set to give a 50
input match. If the
source does not require a 50
match, remove this and drive
directly into the blocking capacitor. The source will then see
the 6.25k
load of the biasing network. The gain resistor
(R
G
) is AC-coupled, giving the circuit a DC gain of +1
—
which
puts the noninverting input DC bias voltage (2.5V) on the
output as well. The feedback resistor value has been ad-
justed from the bipolar supply condition to re-optimize for a
flat frequency response in +5V only, gain of +2 operation. On
a single +5V supply, the output voltage can swing to within
1.0V of either supply pin while delivering more than 50mA
output current giving 3Vp-p output swing into an AC-coupled
100
load if required (8dBm maximum at the matched load).
The circuit of Figure 3 shows a blocking capacitor driving into
a 1k
load resistor. Alternatively, the blocking capacitor
could be removed if the load is tied to a supply midpoint or
to ground if the DC current required by the load is accept-
able.
Figure 4 shows the AC-coupled, single +5V supply, gain of
–
1V/V circuit configuration used as a basis for the +5V only
Typical Characteristics. In this case, the midpoint DC bias on
the noninverting input is also decoupled with an additional
0.1
μ
F decoupling capacitor. This reduces the source imped-
ance at higher frequencies for the noninverting input bias
current noise. This 2.5V bias on the noninverting input pin
appears on the inverting input pin and, since R
G
is DC
blocked by the input capacitor, will also appear at the output
pin. One advantage to inverting operation is that since there
is no signal swing across the input stage, higher slew rates
and operation to even lower supply voltages is possible. To
retain a 1Vp-p output capability, operation down to a 3V
supply is allowed. At a +3V supply, the input stage is
saturated, but for the inverting configuration of a current-
feedback amplifier, wideband operation is retained even
under this condition.
The circuits of Figure 3 and 4 show single-supply operation
at +5V. These same circuits may be used up to single
supplies of +12V with minimal changes in the performance of
the OPA683.
LOW POWER, VIDEO LINE DRIVER
APPLICATIONS
For low power, video line driving, the OPA683 provides the
output current and linearity to support multiple load compos-
ite video signals. Figure 5 shows a typical
±
5V supply video
line driver application. The improved 2nd-harmonic distortion
of the CFB
plus
architecture, along with the OPA683
’
s high
output current and voltage, gives exceptional differential gain
and phase performance in a very low power solution. As the
Typical Characteristics show, a single video load shows a
dG/dP of 0.06%/0.03
°
. Multiple loads may also be driven with
< 0.15%/0.1
°
dG/dP for up to 4 parallel video loads where the
amplifier is driving an equivalent load of 37.5
.
R
F
1.4k
OPA683
+5V
DIS
50
Source
0.1
μ
F
6.8
μ
F
+
12.5k
2.5V
12.5k
50
R
1.4k
0.1
μ
F
0.1
μ
F
0.1
μ
F
V
I
V
O
1k
FIGURE 3. AC-Coupled, G = +2V/V, Single-Supply, Specifi-
cation and Test Circuit.
R
F
1.4k
OPA683
+5V
DIS
50
Source
0.1
μ
F
0.1
μ
F
2.5V
6.8
μ
F
+
R
G
1.4k
12.5k
12.5k
V
I
0.1
μ
F
52.3
0.1
μ
F
V
O
1k
FIGURE 4. AC-Coupled, G =
–
1V/V, Single-Supply, Specifi-
cation and Test Circuit.
1.2k
OPA683
+5V
DIS
–
5V
75
75
1.2k
75
Load
Supply Decoupling not shown.
Coax
VIDEO
IN
FIGURE 5. Gain of +2 Video Cable Driver.
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| OPA683IDBVTG4 | 功能描述:高速運(yùn)算放大器 Very Lo-Pwr Current Feedback RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 電壓增益 dB:116 dB 輸入補(bǔ)償電壓:0.5 mV 轉(zhuǎn)換速度:55 V/us 工作電源電壓:36 V 電源電流:7.5 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| OPA683IDG4 | 功能描述:高速運(yùn)算放大器 Very Lo-Pwr Current Feedback RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 電壓增益 dB:116 dB 輸入補(bǔ)償電壓:0.5 mV 轉(zhuǎn)換速度:55 V/us 工作電源電壓:36 V 電源電流:7.5 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| OPA683IDR | 功能描述:高速運(yùn)算放大器 Very Lo-Pwr Current Feedback RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 電壓增益 dB:116 dB 輸入補(bǔ)償電壓:0.5 mV 轉(zhuǎn)換速度:55 V/us 工作電源電壓:36 V 電源電流:7.5 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| OPA683IDRG4 | 功能描述:高速運(yùn)算放大器 Very Lo-Pwr Current Feedback RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 電壓增益 dB:116 dB 輸入補(bǔ)償電壓:0.5 mV 轉(zhuǎn)換速度:55 V/us 工作電源電壓:36 V 電源電流:7.5 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| OPA684 | 制造商:BB 制造商全稱:BB 功能描述:Quad, Low-Power, Current-Feedback OPERATIONAL AMPLIFIER |
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