- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄373973 > ADA4841-1 (Analog Devices, Inc.) Low Power, Low Noise and Distortion, Rail-to-Rail Output Amplifier PDF資料下載
參數(shù)資料
| 型號(hào)： | ADA4841-1 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Low Power, Low Noise and Distortion, Rail-to-Rail Output Amplifier |
| 中文描述： | 低功耗，低噪聲和失真，軌到軌輸出放大器 |
| 文件頁數(shù)： | 14/20頁 |
| 文件大小： | 442K |
| 代理商： | ADA4841-1 |
ADA4841-1/ADA4841-2
The output noise spectral density can be calculated by
Rev. C | Page 14 of 20
[
]
2
2
2
2
2
2
2
4
4
1
4
F
G
F
S
G
F
R
ien
kTRg
R
R
ven
R
ien
kTRs
R
R
kTRf
en
vout
+
+
+
+
+
+
=
_
(6)
where:
k
is Boltzmann’s Constant.
T
is the absolute temperature, degrees Kelvin.
ien
is the amplifier input current noise spectral density, pA/√Hz.
ven
is the amplifier input voltage spectral density, nV/√Hz.
R
S
is the source resistance as shown in Figure 40.
R
F
and
R
G
are the feedback network resistances, as shown in
Figure 40.
Source resistance noise, amplifier voltage noise (ven), and the
voltage noise from the amplifier current noise (ien × R
S
) are
all subject to the noise gain term (1 + R
F
/R
G
). Note that with a
2.1 nV/√Hz input voltage noise and 1.4 pA/√Hz input current,
the noise contributions of the amplifier are relatively small for
source resistances between approximately 200 Ω and 30 kΩ.
Figure 41 shows the total RTI noise due to the amplifier vs. the
source resistance. In addition, the value of the feedback resistors
used impacts the noise. It is recommended to keep the value of
feedback resistors between 250 Ω and 1 kΩ to keep the total
noise low.
1000
0.1
10
100k
0
SOURCE RESISTANCE (
Ω
)
N
100
10
1
100
1k
10k
TOTAL AMPLIFIER NOISE
SOURCE RESISTANCE NOISE
AMPLIFIER + RESISTOR NOISE
Figure 41. RTI Noise vs. Source Resistance
HEADROOM CONSIDERATIONS
The ADA4841-1/ADA4841-2 are designed to provide maximum
input and output signal ranges with 16-bit to 18-bit dc linearity.
As the input or output headroom limits are reached, the signal
linearity degrades.
The input stage positive limit is almost exactly a volt below the
positive supply at room temperature. Input voltages above that
start to show clipping behavior. The positive input voltage limit
increases with temperature with a coefficient of about 2 mV/°C.
The lower supply limit is nominally below the minus supply;
therefore, in a standard gain configuration, the output stage
limits the signal headroom on the negative supply side. Figure 42
and Figure 43 show the nominal CMRR behavior at the limits of
the input headroom for three temperatures—this is generated
using the subtractor topology shown in Figure 44, which avoids
the output stage limitation.
300
260
220
180
140
100
60
20
–20
–60
–100
–140
–180
–220
–260
–300
3.00
5.00
0
COMMON-MODE VOLTAGE (V)
C
μ
V
3.20
3.40
3.60
3.80
4.00
4.20
4.40
4.60
4.80
–40°C
+25°C
+125°C
Figure 42. +CMV vs. Common-Mode Error vs. V
OS
0
–800
–6.00
–4.00
0
COMMON-MODE VOLTAGE (V)
C
μ
V
–50
–100
–150
–200
–250
–300
–350
–400
–450
–500
–550
–600
–650
–700
–750
–5.80 –5.60 –5.40 –5.20 –5.00 –4.80 –4.60 –4.40 –4.20
–40°C
+25°C
+125°C
Figure 43. CMV vs. Common-Mode Error vs. V
OS
+ V
OUT
–
– V
CM
+
0
Figure 44. Common-Range Subtractor
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ADA4841-1YRJZ-R2 | Low Power, Low Noise and Distortion, Rail-to-Rail Output Amplifier |
| ADA4841-1YRJZ-R7 | Low Power, Low Noise and Distortion, Rail-to-Rail Output Amplifier |
| ADA4841-1YRJZ-RL | Low Power, Low Noise and Distortion, Rail-to-Rail Output Amplifier |
| ADA4841-1YRZ | Low Power, Low Noise and Distortion, Rail-to-Rail Output Amplifier |
| ADA4841-1YRZ-R7 | Low Power, Low Noise and Distortion, Rail-to-Rail Output Amplifier |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADA4841-1YR-EBZ | 制造商:AD 制造商全稱:Analog Devices 功能描述:Low Power, Low Noise and Distortion ail-to-Rail Output Amplifiers |
| ADA4841-1YRJ-EBZ | 功能描述:BOARD EVAL FOR ADA4841-1YRJ RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評(píng)估板 - 運(yùn)算放大器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- |
| ADA4841-1YRJZ | 制造商:Analog Devices 功能描述:OP AMP VF R-R LP LN SOT23-6 制造商:Analog Devices 功能描述:OP AMP, VF, R-R, LP, LN, SOT23-6 制造商:Analog Devices 功能描述:OP AMP, VF, R-R, LP, LN, SOT23-6, Op Amp Type:Rail to Rail, No. of Amplifiers:1, 制造商:Analog Devices 功能描述:OP AMP, VF, R-R, LP, LN, SOT23-6, Op Amp Type:Rail to Rail, No. of Amplifiers:1, Slew Rate:13V/s, Supply Voltage Range:2.7V to 12V, Amplifier Case Style:SOT-23, No. of Pins:6, Bandwidth:80MHz, Operating Temperature Min:-40C, , RoHS Compliant: Yes |
| ADA4841-1YRJZ-R2 | 制造商:Analog Devices 功能描述:OP Amp Single Volt Fdbk R-R O/P ±6V/12V 6-Pin SOT-23 T/R 制造商:Analog Devices 功能描述:OP AMP SGL VOLT FDBK R-R O/P 6V/12V 6PIN SOT-23 - Tape and Reel 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述:IC OP AMPVFR-RLPLNSOT23-6 制造商:Analog Devices 功能描述:IC, OP-AMP, 80MHZ, 13V/ us, SOT-23-6, Op Amp Type:Low Power, No. of Amplifiers:1 |
| ADA4841-1YRJZ-R2 | 制造商:Analog Devices 功能描述:IC OP-AMP 80MHZ 13V/S SOT-23-6 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。