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參數(shù)資料
| 型號(hào)： | MAX4100ESA |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | RES 5.1K 1/4W 2% |
| 中文描述： | OP-AMP, 8000 uV OFFSET-MAX, 500 MHz BAND WIDTH, PDSO8 |
| 封裝： | 0.150 INCH, SOIC-8 |
| 文件頁數(shù)： | 9/12頁 |
| 文件大?。?/td> | 144K |
| 代理商： | MAX4100ESA |
Setting Gain
The MAX4100/MAX4101 are voltage-feedback op amps
that can be configured as an inverting or noninverting
gain block, as shown in Figures 1a and 1b. The gain is
determined by the ratio of two resistors and does not
affect amplifier frequency compensation.
In the unity-gain configuration (as shown in Figure 1c),
maximum bandwidth and stability is achieved with the
MAX4100 when a small feedback resistor is included.
This resistor suppresses the negative effects of para-
sitic inductance and capacitance. A value of 24
pro-
vides the best combination of wide bandwidth, low
peaking, and fast settling time. In addition, this resistor
reduces the errors from input bias currents.
Choosing Resistor V alues
The values of feedback and input resistors used in the
inverting or noninverting gain configurations are not
critical (as is the case with current feedback ampli-
fiers). However, take care when selecting because the
ohmic values need to be kept small and noninductive
for practical reasons.
The input capacitance of the MAX4100/MAX4101 is
approximately 2pF. In either the inverting or noninvert-
ing configuration, the bandwidth limit caused by the
package capacitance and resistor time constant is
f3dB= 1 / (2
Π
RC), where R is the parallel combination
of the input and feedback resistors (RF and RG in
Figure 2) and C is the package and board capacitance
at the inverting input. Table 1 shows the bandwidth limit
for several values of RF and RG, assuming 4pF total
capacitance (2pF for the MAX4100/MAX4101 and 2pF
of PC board parasitics).
*Assuming an infinite bandwidth amplifier.
Resistor T ypes
Surface-mount resistors are the best choice for high-
frequency circuits. They are of similar material to the
metal film resistors, but are deposited using a thick-film
process in a flat, linear manner so that inductance is
minimized. Their small size and lack of leads also mini-
mize parasitic inductance and capacitance, thereby
yielding more predictable performance.
DC and Noise Errors
There are several major error sources to be considered
in any operational amplifier. These apply equally to the
MAX4100/MAX4101. Offset-error terms are given by the
equation below. Voltage and current noise errors are
root-square summed, so are computed separately.
Using the circuit in Figure 3, the total output offset volt-
age is determined by:
a) The input offset voltage (V
OS
) times the closed-loop
gain (1 + R
F
/ R
G
)
b) The positive input bias current (I
B+
) times the
source resistor (R
S
) minus the negative input bias
current (I
B-
) times the parallel combination of R
G
and R
F
. I
OS
(offset current) is the difference
between the two bias currents. If R
G
||
R
F
= R
S
, this
part of the expression becomes I
OS
x R
S
.
The equation for total DC error is:
V
I
R
V
R
R
OUT
OS
S
OS
F
G
=
+
(
)
+
1
M
500MHz, Low-Power Op Amps
_______________________________________________________________________________________
9
MAX4101
V
IN
V
OUT
R
F
R
G
C
MAX4100
Figure 2. Effect of Feedback Resistor Values and Parasitic
Capacitance on Bandwidth
GAIN
(V/V)
R
G
(
)
R
F
(
)
BANDWIDTH
LIMIT*
(MHz)
+1
+2
+5
+10
-1
-2
-5
-10
∞
24
200
200
270
200
150
250
500
1659
398
995
1474
398
796
955
875
200
50
30
200
75
50
50
Table 1. Resistor and Bandwidth Values
for Various Gain Configurations
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX4101ESA | 500MHz, Low-Power Op Amps |
| MAX410MJA | OSCILLATOR 50.00MHZ SMD |
| MAX410BEPA | Single/Dual/Quad, 28MHz, Low-Noise, Low-Voltage, Precision Op Amps |
| MAX412BEPA | Single/Dual/Quad, 28MHz, Low-Noise, Low-Voltage, Precision Op Amps |
| MAX410BESA | Single/Dual/Quad, 28MHz, Low-Noise, Low-Voltage, Precision Op Amps |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX4100ESA+ | 功能描述:運(yùn)算放大器 - 運(yùn)放 RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| MAX4100ESA+T | 功能描述:運(yùn)算放大器 - 運(yùn)放 RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| MAX4100ESA-T | 功能描述:運(yùn)算放大器 - 運(yùn)放 RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| MAX4100EUA | 功能描述:運(yùn)算放大器 - 運(yùn)放 RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| MAX4100EUA+ | 功能描述:運(yùn)算放大器 - 運(yùn)放 RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
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