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參數(shù)資料
| 型號： | ADA4896-2ARMZ-R7 |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 11/29頁 |
| 文件大小： | 0K |
| 描述： | IC OPAMP GP R-R 50MHZ LP 8MSOP |
| 特色產(chǎn)品： | Rail-to-Rail Input/Output Amplifiers |
| 標(biāo)準(zhǔn)包裝： | 1,000 |
| 放大器類型： | 電壓反饋 |
| 電路數(shù)： | 2 |
| 輸出類型： | 滿擺幅 |
| 轉(zhuǎn)換速率： | 120 V/µs |
| -3db帶寬： | 230MHz |
| 電流 - 輸入偏壓： | 11µA |
| 電壓 - 輸入偏移： | 28µV |
| 電流 - 電源： | 3mA |
| 電流 - 輸出 / 通道： | 80mA |
| 電壓 - 電源，單路/雙路(±)： | 3 V ~ 10 V，±1.5 V ~ 5 V |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 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： | 帶卷 (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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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADA4896-2ARMZ-RL | 制造商:AD 制造商全稱:Analog Devices 功能描述:1 nV/√Hz, Low Power |
| ADA4897-1 | 制造商:AD 制造商全稱:Analog Devices 功能描述:1 nV/√Hz, Low Power |
| ADA4897-1AR-EBZ | 功能描述:BOARD EVAL FOR ADA4897 SOIC RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 運算放大器 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:- |
| ADA4897-1ARJ-EBZ | 制造商:AD 制造商全稱:Analog Devices 功能描述:1 nV/√Hz, Low Power |
| ADA4897-1ARJZ-R2 | 制造商:Analog Devices 功能描述:LOW NOISE LOW POWER R/R OP AMP SINGLE - Tape and Reel |
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