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| 型号： | ADA4897-1ARZ-RL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 11/29页 |
| 文件大小： | 0K |
| 描述： | IC OPAMP GP RR 230MHZ LN 8SOIC |
| 特色产品： | Rail-to-Rail Input/Output Amplifiers |
| 标准包装： | 2,500 |
| 放大器类型： | 电压反馈 |
| 电路数： | 1 |
| 输出类型： | 满摆幅 |
| 转换速率： | 120 V/µs |
| -3db带宽： | 230MHz |
| 电流 - 输入偏压： | 11µA |
| 电压 - 输入偏移： | 28µV |
| 电流 - 电源： | 3mA |
| 电流 - 输出 / 通道： | 80mA |
| 电压 - 电源，单路/双路(±)： | 3 V ~ 10 V，±1.5 V ~ 5 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： | 带卷 (TR) |
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ADA4896-2/ADA4897-1/ADA4897-2
Data Sheet
Rev.
| Page 18 of 28
DC ERRORS
Figure 46 shows a typical connection diagram and the major
dc error sources.
RG
– VIN +
RS
– VIP +
IB+
IB–
+ VOUT –
RF
+ VOS –
094
47
-03
1
Figure 46. Typical Connection Diagram and DC Error Sources
The ideal transfer function (all error sources set to 0 and
infinite dc gain) can be written as
IN
G
F
IP
G
F
OUT
V
R
V
R
V
×
×
+
= 1
(1)
This equation reduces to the familiar forms for noninverting
and inverting op amp gain expressions, as follows:
For noninverting gain (VIN = 0 V)
IP
G
F
OUT
V
R
V
×
+
= 1
(2)
For inverting gain (VIP = 0 V)
IN
G
F
OUT
V
R
V
×
=
(3)
The total output voltage error is the sum of errors due to the
amplifier offset voltage and input currents. The output error
due to the offset voltage can be estimated as
+
×
+
+
=
G
F
OUT
PNOM
P
CM
OFFSET
OUT
R
A
V
PSRR
V
CMRR
V
NOM
ERROR
1
(4)
where:
is the offset voltage at the specified supply voltage,
which is measured with the input and output at midsupply.
VCM is the common-mode voltage.
VP is the power supply voltage.
VPNOM is the specified power supply voltage.
CMRR is the common-mode rejection ratio.
PSRR is the power supply rejection ratio.
A is the dc open-loop gain.
NOM
OFFSET
V
The output error due to the input currents can be estimated as
+
×
+
×
×
+
×
=
B
G
F
S
B
G
F
G
F
OUT
I
R
I
R
V
ERROR
1
)
||
(
(5)
BIAS CURRENT CANCELLATION
To cancel the output voltage error due to unmatched bias
RG
RS
RBP
RBN
RF
09
44
7-
04
8
Figure 47. Using RBP and RBN to Cancel Bias Current Error
To compensate for the unmatched bias currents at the two
Table 11. Setting RBN and RBP to Cancel Bias Current Errors
Value of RF||RG
Value of RBP (Ω)
Value of RBN (Ω)
Greater Than RS
RF||RG RS
0
Less Than RS
0
RS RF||RG
and when RF||RG < RS.
Table 12. Examples of RBN and RBP Settings
Gain
RF (Ω)
RG (Ω)
RS (Ω)
RBP (Ω)
RBN (Ω)
+2
249
50
74.5
0
+10
249
27.4
50
0
25.3
B
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADA4897-1SRJZ-EPR7 | 制造商:Analog Devices 功能描述:LOW NOISE LOW POWER R/R OP AMP SINGLE - Tape and Reel 制造商:Analog Devices 功能描述:IC OPAMP GP 230MHZ RRO SOT23-6 |
| ADA4897-2 | 制造商:AD 制造商全称:Analog Devices 功能描述:1 nV/√Hz, Low Power |
| ADA4897-2ARM-EBZ | 制造商:AD 制造商全称:Analog Devices 功能描述:1 nV/√Hz, Low Power |
| ADA4897-2ARMZ | 功能描述:IC OPAMP RR 230MHZ LP 10MSOP RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:1 系列:- 放大器类型:通用 电路数:4 输出类型:满摆幅 转换速率:0.028 V/µs 增益带宽积:105kHz -3db带宽:- 电流 - 输入偏压:3nA 电压 - 输入偏移:100µV 电流 - 电源:3.3µA 电流 - 输出 / 通道:12mA 电压 - 电源，单路/双路(±):2.7 V ~ 12 V，±1.35 V ~ 6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:14-TSSOP 包装:剪切带 (CT) 其它名称:OP481GRUZ-REELCT |
| ADA4897-2ARMZ_PROMO | 制造商:Analog Devices 功能描述:OP AMP 230MHZ 20V/US 500UV |
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