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參數(shù)資料
| 型號(hào)： | MAX4117ESA+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 3/12頁 |
| 文件大小： | 0K |
| 描述： | IC AMP CURRENT FB LP 8-SOIC |
| 標(biāo)準(zhǔn)包裝： | 100 |
| 放大器類型： | 電流反饋 |
| 電路數(shù)： | 2 |
| 轉(zhuǎn)換速率： | 1200 V/µs |
| -3db帶寬： | 400MHz |
| 電流 - 輸入偏壓： | 3.5µA |
| 電壓 - 輸入偏移： | 1000µV |
| 電流 - 電源： | 5mA |
| 電流 - 輸出 / 通道： | 80mA |
| 電壓 - 電源，單路/雙路(±)： | ±4.5 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-SOIC |
| 包裝： | 管件 |
Choosing Feedback and Gain Resistors
The MAX4112/MAX4113/MAX4117–MAX4120 are cur-
rent feedback amplifiers. Increasing feedback resistor
values will decrease peaking. Use the input resistor
(RG) to change the magnitude of the gain. Figure 2
shows the standard inverting and noninverting configu-
rations. Notice that the gain of the noninverting circuit
(Figure 2b) is 1 plus the magnitude of the inverting
closed-loop gain (Table 1).
DC and Noise Errors
There are several major error sources to consider in
any operational amplifier. These apply equally to the
MAX4112/MAX4113/MAX4117–MAX4120. Offset-error
terms are given by the equation below. Voltage and
current-noise errors are root-square summed and
therefore computed separately. In Figure 3, the total
output offset voltage is determined by:
a) The input offset voltage (VOS) times the closed-loop
gain (1 + (RF / RG)).
b) The positive input bias current (IB+) times the source
resistor (RS) (usually 50 or 75), plus the negative
input bias current (IB-) times the parallel combination
of RG and RF. In current-mode feedback amplifiers,
the input bias currents may flow into or out of the
device. For this reason, there is no benefit to match-
ing the resistance at both inputs.
The equation for total DC error is:
c) The total output-referred noise voltage is:
The MAX4112/MAX4117/MAX4119 have a very low,
2nV/√Hz noise voltage. The current noise at the positive
input (in+) is 13pA/√Hz, and the current noise at the
inverting input (in-) is 14pA/√Hz.
An example of the DC error calculations, using the
MAX4112 typical data and the typical operating circuit
where RF = RG = 600 (RF
|| RG = 300) and RS = 50,
gives the following:
VOUT = (3.5 x 10-6 x 50 + 3.5 x 10-6 x 300 + 10-3) (1 + 1)
VOUT = 4.45mV
Calculating total output noise in a similar manner yields:
With a 200MHz system bandwidth, this calculates to
133VRMS (approximately 797VP-P, choosing the six-
sigma value).
Resistor Types
Surface-mount resistors are the best choice for high-
frequency circuits. They are of similar material to metal-
film resistors, but are deposited using a thick-film
process in a flat, linear manner that minimizes induc-
tance. Their small size and lack of leads also minimizes
parasitic inductance and capacitance, yielding more
predictable performance.
Metal-film resistors with leads are manufactured using
a thin-film process where resistive material is deposited
in a spiral layer around a ceramic rod. Although the
materials used are noninductive, the spiral winding pre-
sents a small inductance (about 5nH) that may have an
adverse effect on high-frequency circuits.
Carbon-composition resistors with leads are manufac-
tured by pouring the resistor material into a mold. This
process yields relatively low-inductance resistors that
are very useful in high-frequency applications, although
they tend to cost more and have more thermal noise
than other types. The ability of carbon-composition
resistors to self-heal after a large current overload
makes them useful in high-power RF applications.
For general-purpose use, surface-mount metal-film
resistors seem to have the best overall performance for
low cost, low inductance, and low noise.
Video Line Driver
The MAX4112/MAX4113/MAX4117–MAX4120 are opti-
mized (gain flatness) to drive coaxial transmission lines
when the cable is terminated at both ends, as shown in
Figure 4. Cable frequency response can cause varia-
tions in the flatness of the signal.
e
1 1
13x10
x50
14x10
x300
2x10
e
9.4nV
Hz
n(OUT)
12
2
12
2
9
2
n(OUT)
/
=+
()
() +() +()
=
e
R
iR
R
e
n OUT
F
G
nS
nF
G
n
()
||
=+
()
[] + ()
[] +()
+
1
22
2
V
I
R
IR
R
V
1+
R
OUT
B
S
B
F
G
OS
F
G
||
=
() + ()
() +
[]
+
MAX4112/MAX4113/MAX4117–MAX4120
Single/Dual/Quad, 400MHz, Low-Power,
Current Feedback Amplifiers
______________________________________________________________________________________
11
RG
IB-
IB+
VOUT
RF
RS
MAX4112
MAX4113
MAX4117
MAX4118
MAX4119
MAX4120
Figure 3. Output Offset Voltage
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX4117ESA+ | 功能描述:高速運(yùn)算放大器 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 |
| MAX4117ESA+T | 功能描述:高速運(yùn)算放大器 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 |
| MAX4117ESA-T | 功能描述:高速運(yùn)算放大器 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 |
| MAX4117ESA-TG068 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX4117EVKIT | 功能描述:放大器 IC 開發(fā)工具 RoHS:否 制造商:International Rectifier 產(chǎn)品:Demonstration Boards 類型:Power Amplifiers 工具用于評(píng)估:IR4302 工作電源電壓:13 V to 23 V |
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