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| 型号： | ADA4841-1YRZ-R7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 7/21页 |
| 文件大小： | 0K |
| 描述： | IC OPAMP VF R-R LP LN 60MA 8SOIC |
| 标准包装： | 1 |
| 放大器类型： | 电压反馈 |
| 电路数： | 1 |
| 输出类型： | 满摆幅 |
| 转换速率： | 13 V/µs |
| -3db带宽： | 80MHz |
| 电流 - 输入偏压： | 3µA |
| 电压 - 输入偏移： | 40µV |
| 电流 - 电源： | 1.5mA |
| 电流 - 输出 / 通道： | 60mA |
| 电压 - 电源，单路/双路(±)： | 2.7 V ~ 12 V，±1.35 V ~ 6 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SO |
| 包装： | 标准包装 |
| 产品目录页面： | 768 (CN2011-ZH PDF) |
| 其它名称： | ADA4841-1YRZ-R7DKR |
ADA4841-1/ADA4841-2
Rev. E | Page 14 of 20
The output noise spectral density can be calculated by
[]
2
4
1
4
F
G
F
S
G
F
R
ien
kTRg
R
ven
R
ien
kTRs
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.
RF and RG are the feedback network resistances, as shown in
Source resistance noise, amplifier voltage noise (ven), and the
voltage noise from the amplifier current noise (ien × RS) are
all subject to the noise gain term (1 + RF/RG). 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.
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
05614-007
SOURCE RESISTANCE (
Ω)
NOISE
(
n
V/
Hz)
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
–300
3.00
5.00
05614
-055
COMMON-MODE VOLTAGE (V)
C
O
M
O
N-
M
O
DE
E
RRO
R
(
μV)
260
220
180
140
100
60
20
–20
–60
–100
–140
–180
–220
–260
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. VOS
0
–800
–6.00
–4.00
05614-054
COMMON-MODE VOLTAGE (V)
COMMON-
MODE
ERROR
(
μV)
–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. VOS
+ VOUT –
– VCM +
05614-
051
Figure 44. Common-Range Subtractor
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADA4841-1YRZ-R7 | 制造商:Analog Devices 功能描述:IC OP-AMP 80MHZ 13V/S SOIC-8 |
| ADA4841-1YRZ-RL | 功能描述:IC OPAMP VF R-R LP LN 60MA 8SOIC RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:50 系列:- 放大器类型:通用 电路数:2 输出类型:满摆幅 转换速率:1.8 V/µs 增益带宽积:6.5MHz -3db带宽:4.5MHz 电流 - 输入偏压:5nA 电压 - 输入偏移:100µV 电流 - 电源:65µA 电流 - 输出 / 通道:35mA 电压 - 电源，单路/双路(±):1.8 V ~ 5.25 V，±0.9 V ~ 2.625 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-MSOP 包装:管件 |
| ADA4841-2 | 制造商:AD 制造商全称:Analog Devices 功能描述:Low Power, Low Noise and Distortion ail-to-Rail Output Amplifiers |
| ADA4841-2YCPZ-R2 | 功能描述:IC OPAMP VF R-R LP 60MA 8LFCSP RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:1,000 系列:- 放大器类型:电压反馈 电路数:4 输出类型:满摆幅 转换速率:33 V/µs 增益带宽积:20MHz -3db带宽:30MHz 电流 - 输入偏压:2nA 电压 - 输入偏移:3000µV 电流 - 电源:2.5mA 电流 - 输出 / 通道:30mA 电压 - 电源，单路/双路(±):4.5 V ~ 16.5 V，±2.25 V ~ 8.25 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-SOIC（0.154"，3.90mm 宽） 供应商设备封装:14-SOIC 包装:带卷 (TR) |
| ADA4841-2YCPZ-R7 | 功能描述:运算放大器 - 运放 Dual Low Power Low Noise Rail-Rail OpAmp RoHS:否 制造商:Texas Instruments 通道数量:1 共模抑制比（最小值）:120 dB 输入补偿电压:6 V 输入偏流（最大值）:1400 pA 工作电源电压:4 V to 36 V 安装风格:SMD/SMT 封装 / 箱体:SOT-23-5 转换速度:0.8 V / us 关闭:No 输出电流: 最大工作温度:+ 125 C 封装:Reel |
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