參數(shù)資料
型號(hào)： AD8551ARMZ
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 9/24頁(yè)
文件大?。?/td> 0K
描述： IC OPAMP CHOPPER R-R 30MA 8MSOP
標(biāo)準(zhǔn)包裝： 50
放大器類(lèi)型： 斷路器（零漂移）
電路數(shù)： 1
輸出類(lèi)型： 滿(mǎn)擺幅
轉(zhuǎn)換速率： 0.4 V/µs
增益帶寬積： 1.5MHz
電流 - 輸入偏壓： 10pA
電壓 - 輸入偏移： 1000µV
電流 - 電源： 850µA
電流 - 輸出 / 通道： 30mA
電壓 - 電源，單路/雙路(±)： 2.7 V ~ 5.5 V
工作溫度： -40°C ~ 125°C
安裝類(lèi)型： 表面貼裝
封裝/外殼： 8-TSSOP，8-MSOP（0.118"，3.00mm 寬）
供應(yīng)商設(shè)備封裝： 8-MSOP
包裝： 管件
Data Sheet
AD8551/AD8552/AD8554
Rev. E | Page 17 of 24
1/f NOISE CHARACTERISTICS
Another advantage of auto-zero amplifiers is their ability to
cancel flicker noise. Flicker noise, also known as 1/f noise, is
noise inherent in the physics of semiconductor devices, and it
increases 3 dB for every octave decrease in frequency. The 1/f
corner frequency of an amplifier is the frequency at which the
flicker noise is equal to the broadband noise of the amplifier.
At lower frequencies, flicker noise dominates, causing higher
degrees of error for sub-Hertz frequencies or dc precision
applications.
Because the AD855x amplifiers are self-correcting op amps, they
do not have increasing flicker noise at lower frequencies. In
essence, low frequency noise is treated as a slowly varying offset
error and is greatly reduced as a result of autocorrection. The
correction becomes more effective as the noise frequency
approaches dc, offsetting the tendency of the noise to increase
exponentially as frequency decreases. This allows the AD855x
to have lower noise near dc than standard low noise amplifiers
that are susceptible to 1/f noise.
INTERMODULATION DISTORTION
The AD855x can be used as a conventional op amp for gain/
bandwidth combinations up to 1.5 MHz. The auto-zero correction
frequency of the device is fixed at 4 kHz. Although a trace amount
of this frequency feeds through to the output, the amplifier can
be used at much higher frequencies. Figure 56 shows the spectral
output of the AD8552 with the amplifier configured for unity
gain and the input grounded.
The 4 kHz auto-zero clock frequency appears at the output with
less than 2 μV of amplitude. Harmonics are also present, but at
reduced levels from the fundamental auto-zero clock frequency.
The amplitude of the clock frequency feedthrough is proportional
to the closed-loop gain of the amplifier. Like other autocorrection
amplifiers, at higher gains there is more clock frequency
feedthrough. Figure 57 shows the spectral output with the
amplifier configured for a gain of 60 dB.
FREQUENCY (kHz)
0
–140
0
10
1
OU
TP
U
T
S
IGN
A
L
(
dB
)
–20
–40
–60
–80
–100
–120
2
3
4
5
6
7
8
9
VSY = 5V
AV = 0dB
01101-
056
Figure 56. Spectral Analysis of AD8552 Output in Unity Gain Configuration
FREQUENCY (kHz)
0
–140
0
10
1
OU
TP
U
T
S
IGN
A
L
(
dB
)
–20
–40
–60
–80
–100
–120
2
3
4
5
6
7
8
9
VSY = 5V
AV = 60dB
01101-
057
Figure 57. Spectral Analysis of AD855x Output with +60 dB Gain
When an input signal is applied, the output contains some
degree of intermodulation distortion (IMD). This is another
characteristic feature of all autocorrection amplifiers. IMD
appears as sum and difference frequencies between the input
signal and the 4 kHz clock frequency (and its harmonics) and is
at a level similar to, or less than, the clock feedthrough at the
output. The IMD is also proportional to the closed-loop gain of
the amplifier. Figure 58 shows the spectral output of an AD8552
configured as a high gain stage (+60 dB) with a 1 mV input signal
applied. The relative levels of all IMD products and harmonic
distortion add up to produce an output error of 60 dB relative
to the input signal. At unity gain, these add up to only 120 dB
relative to the input signal.
IMD < 100V rms
OUTPUT SIGNAL
1V rms @ 200Hz
FREQUENCY (kHz)
0
10
1
OU
TP
U
T
S
IGN
A
L
(
dB
)
–20
–40
–60
–80
–100
–120
2
3
4
5
6
7
8
9
VSY = 5V
AV = 60dB
01101-
058
Figure 58. Spectral Analysis of AD8552 in High Gain with a 1 mV Input Signal
For most low frequency applications, the small amount of auto-
zero clock frequency feedthrough does not affect the precision
of the measurement system. If it is desired, the clock frequency
feedthrough can be reduced through the use of a feedback
capacitor around the amplifier. However, this reduces the
bandwidth of the amplifier. Figure 59 and Figure 60 show a
configuration for reducing the clock feedthrough and the
corresponding spectral analysis at the output. The 3 dB
bandwidth of this configuration is 480 Hz.
相關(guān)PDF資料
PDF描述
15-24-7243 CONN HEADER 24POS 4.2MM STR GOLD
CT0805M4G VARISTOR 4.0VRMS 0805 SMD
OP113FSZ-REEL7 IC OPAMP GP 3.4MHZ LN 40MA 8SOIC
CT0805K30G VARISTOR 30VRMS 0805 SMD
15-24-7183 CONN HEADER 18POS 4.2MM STR GOLD
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AD8551ARMZ-R2 制造商:Analog Devices 功能描述:SP Amp Zero Drift Amplifier Single R-R I/O 5V 8-Pin MSOP T/R 制造商:Analog Devices 功能描述:Operational Amplifier (Op-Amp) IC 制造商:Analog Devices 功能描述:IC OP AMP R/R SINGLE 8MSOP
AD8551ARMZ-REEL 功能描述:IC OPAMP CHOPPER R-R 30MA 8MSOP RoHS:是 類(lèi)別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 產(chǎn)品培訓(xùn)模塊:Differential Circuit Design Techniques for Communication Applications 標(biāo)準(zhǔn)包裝:1 系列:- 放大器類(lèi)型:RF/IF 差分 電路數(shù):1 輸出類(lèi)型:差分 轉(zhuǎn)換速率:9800 V/µs 增益帶寬積:- -3db帶寬:2.9GHz 電流 - 輸入偏壓:3µA 電壓 - 輸入偏移:- 電流 - 電源:40mA 電流 - 輸出 / 通道:- 電壓 - 電源，單路/雙路(±):3 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:16-VQFN 裸露焊盤(pán)，CSP 供應(yīng)商設(shè)備封裝:16-LFCSP-VQ 包裝:剪切帶 (CT) 產(chǎn)品目錄頁(yè)面:551 (CN2011-ZH PDF) 其它名稱(chēng):ADL5561ACPZ-R7CT
AD8551AR-REEL 制造商:Analog Devices 功能描述:SP Amp Zero Drift Amplifier Single R-R I/O 5V 8-Pin SOIC N T/R
AD8551AR-REEL7 制造商:Analog Devices 功能描述:SP Amp Zero Drift Amplifier Single R-R I/O 5V 8-Pin SOIC N T/R
AD8551ARZ 功能描述:IC OPAMP CHOPPER R-R 30MA 8SOIC RoHS:是 類(lèi)別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 產(chǎn)品培訓(xùn)模塊:Differential Circuit Design Techniques for Communication Applications 標(biāo)準(zhǔn)包裝:1 系列:- 放大器類(lèi)型:RF/IF 差分 電路數(shù):1 輸出類(lèi)型:差分 轉(zhuǎn)換速率:9800 V/µs 增益帶寬積:- -3db帶寬:2.9GHz 電流 - 輸入偏壓:3µA 電壓 - 輸入偏移:- 電流 - 電源:40mA 電流 - 輸出 / 通道:- 電壓 - 電源，單路/雙路(±):3 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:16-VQFN 裸露焊盤(pán)，CSP 供應(yīng)商設(shè)備封裝:16-LFCSP-VQ 包裝:剪切帶 (CT) 產(chǎn)品目錄頁(yè)面:551 (CN2011-ZH PDF) 其它名稱(chēng):ADL5561ACPZ-R7CT
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*