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參數(shù)資料
| 型號： | MAX4475AUT-T |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 運(yùn)動控制電子 |
| 英文描述： | SOT23, Low-Noise, Low-Distortion, Wide-Band, Rail-to-Rail Op Amps |
| 中文描述： | OP-AMP, 750 uV OFFSET-MAX, 10 MHz BAND WIDTH, PDSO6 |
| 封裝： | MO-178AB, SOT-23, 6 PIN |
| 文件頁數(shù)： | 9/15頁 |
| 文件大小： | 585K |
| 代理商： | MAX4475AUT-T |
Detailed Description
The MAX4475
–
MAX4478/MAX4488/MAX4489 single-
supply operational amplifiers feature ultra-low noise
and distortion. Their low distortion and low noise make
them ideal for use as preamplifiers in wide dynamic-
range applications, such as 16-bit analog-to-digital
converters (see
Typical Operating Circuit
). Their high-
input impedance and low noise are also useful for sig-
nal conditioning of high-impedance sources, such as
piezoelectric transducers.
These devices have true rail-to-rail ouput operation,
drive loads as low as 1k
while maintining DC accura-
cy, and can drive capactive loads up to 200pF without
oscillation. The input common-mode voltage range
extends from (V
DD
- 1.6V) to 200mV below the negative
rail. The push-pull output stage maintains excellent DC
characteristics, while delivering up to ±5mA of current.
The MAX4475
–
MAX4478 are unity-gain stable, while
the MAX4488/MAX4489 have a higher slew rate and
are stable for gains
≥
5V/V. The MAX4475/MAX4488
feature a low-power shutdown mode, which reduces
the supply current to 0.01μA and disables the outputs.
Low Distortion
Many factors can affect the noise and distortion that the
device contributes to the input signal. The following
guidelines offer valuable information on the impact of
design choices on Total Harmonic Distortion (THD).
Choosing proper feedback and gain resistor values for
a particular application can be a very important factor
in reducing THD. In general, the smaller the closed-
loop gain, the smaller the THD generated, especially
when driving heavy resistive loads. The THD of the part
normally increases at approximately 20dB per decade,
as a function of frequency. Operating the device near
or above the full-power bandwidth significantly
degrades distortion.
Referencing the load to either supply also improves the
part
’
s distortion performance, because only one of the
MOSFETs of the push-pull output stage drives the out-
put. Referencing the load to midsupply increases the
part
’
s distortion for a given load and feedback setting.
(See the Total Harmonic Distortion vs. Frequency graph
in the
Typical Operating Characteristics
.)
For gains
≥
5V/V, the decompensated devices
MAX4488/MAX4489 deliver the best distortion perfor-
mance, since they have a higher slew rate and provide
a higher amount of loop gain for a given closed-loop
gain setting. Capacitive loads below 100pF do not sig-
nificantly affect distortion results. Distortion perfor-
mance is relatively constant over supply voltages.
M
SOT23, Low-Noise, Low-Distortion, Wide-Band,
Rail-to-Rail Op Amps
_______________________________________________________________________________________
9
C
Z
R
F
V
OUT
V
IN
R
G
V
OUT
100mV/div
V
IN
100mV/div
100mV
0V
A
V
= +2
R
F
= R
G
= 100k
2
μ
s/div
Figure 1. Adding Feed-Forward Compensation
Figure 2a. Pulse Response with No Feed-Forward
Compensation
V
OUT
100mV/div
V
IN
100mV/div
A
V
= +2
R
F
= R
G
= 100k
2
μ
s/div
Figure 2b. Pulse Response with 10pF Feed-Forward
Compensation
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX4476ATT+ | 制造商:Maxim Integrated Products 功能描述:OP AMP SGL GP R-R O/P 5.5V 6TDFN EP - Rail/Tube |
| MAX4476ATT+T | 功能描述:運(yùn)算放大器 - 運(yùn)放 Wide-Band Rail-Rail 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 |
| MAX4476AUT | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX4476AUT#G16 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX4476AUT#TG16 | 功能描述:運(yùn)算放大器 - 運(yùn)放 Wide-Band Rail-Rail 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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