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參數(shù)資料
| 型號： | EL2227CYZ-T7 |
| 廠商： | INTERSIL CORP |
| 元件分類： | 運算放大器 |
| 英文描述： | Dual Very Low Noise Amplifier |
| 中文描述： | DUAL OP-AMP, 3000 uV OFFSET-MAX, 137 MHz BAND WIDTH, PDSO8 |
| 封裝： | 3 MM, ROHS COMPLIANT, PLASTIC, MO-187AA, MSOP-8 |
| 文件頁數(shù)： | 10/11頁 |
| 文件大小： | 255K |
| 代理商： | EL2227CYZ-T7 |
10
Applications Information
Product Description
The EL2227 is a dual voltage feedback operational amplifier
designed especially for DMT ADSL and other applications
requiring very low voltage and current noise. It also features
low distortion while drawing moderately low supply current
and is built on Elantec's proprietary high-speed
complementary bipolar process. The EL2227 use a classical
voltage-feedback topology which allows them to be used in a
variety of applications where current-feedback amplifiers are
not appropriate because of restrictions placed upon the
feedback element used with the amplifier. The conventional
topology of the EL2227 allows, for example, a capacitor to
be placed in the feedback path, making it an excellent choice
for applications such as active filters, sample-and-holds, or
integrators.
ADSL CPE Applications
The low noise EL2227 amplifier is specifically designed for
the dual differential receiver amplifier function with ADSL
transceiver hybrids as well as other low-noise amplifier
applications. A typical ADSL CPE line interface circuit is
shown in Figure 1. The EL2227 is used in receiving DMT
down stream signal. With careful transceiver hybrid design
and the EL2227 1.9nV/
√
Hz voltage noise and 1.2pA/
√
Hz
current noise performance, -140dBm/Hz system background
noise performance can be easily achieved.
Disable Function
The EL2227 is in the standard dual amplifier package
without the enable/disable function. A simple way to
implement the enable/disable function is depicted below.
When disabled, both the positive and negative supply
voltages are disconnected (see Figure 2 below.)
Power Dissipation
With the wide power supply range and large output drive
capability of the EL2227, it is possible to exceed the 150°C
maximum junction temperatures under certain load and
power-supply conditions. It is therefore important to
calculate the maximum junction temperature (T
JMAX
) for all
applications to determine if power supply voltages, load
conditions, or package type need to be modified for the
EL2227 to remain in the safe operating area. These
parameters are related as follows:
where:
PD
MAXTOTAL
is the sum of the maximum power
dissipation of each amplifier in the package (PD
MAX
)
PD
MAX
for each amplifier can be calculated as follows:
where:
T
MAX
= Maximum Ambient Temperature
θ
JA
= Thermal Resistance of the Package
PD
MAX
= Maximum Power Dissipation of 1 Amplifier
V
S
= Supply Voltage
I
MAX
= Maximum Supply Current of 1 Amplifier
V
OUTMAX
= Maximum Output Voltage Swing of the
Application
R
L
= Load Resistance
To serve as a guide for the user, we can calculate maximum
allowable supply voltages for the example of the video
cable-driver below since we know that T
JMAX
= 150°C,
T
MAX
= 75°C, I
SMAX
= 9.5mA, and the package
θ
JA
s are
shown in Table 1. If we assume (for this example) that we
FIGURE 1. TYPICAL LINE INTERFACE CONNECTION
-
+
-
+
-
+
-
+
Receive
Out -
Receive
Out +
Driver
Input
R
G
R
F
R
F
R
F
R
R
IN
R
R
IN
R
F
R
OUT
R
OUT
Line +
Line -
Receive
Amplifie
Z
LINE
-
+
1μF
4.7μF
1μF
+12V
1k
10k
10k
75k
1k
1k
FIGURE 2.
T
JMAX
T
MAX
θ
JA
PD
MAXTOTAL
×
(
)
+
=
PD
MAX
2
V
S
I
SMAX
V
S
(
V
OUTMAX
)
V
L
----------------------------
×
–
+
×
×
=
EL2227
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| EL2228 | Dual Low Noise Amplifier |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| EL2228 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Dual Low Noise Amplifier |
| EL2228_07 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Dual Low Noise Amplifier |
| EL2228C | 制造商:ELANTEC 制造商全稱:ELANTEC 功能描述:Dual Low Noise Amplifier |
| EL2228CS | 功能描述:IC AMP DUAL LOW NOISE 8-SOIC RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝:1 系列:- 放大器類型:通用 電路數(shù):4 輸出類型:滿擺幅 轉(zhuǎn)換速率:0.6 V/µs 增益帶寬積:1MHz -3db帶寬:- 電流 - 輸入偏壓:2pA 電壓 - 輸入偏移:1000µV 電流 - 電源:85µA 電流 - 輸出 / 通道:20mA 電壓 - 電源，單路/雙路(±):1.8 V ~ 6 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:14-SOIC（0.154"，3.90mm 寬） 供應商設備封裝:14-SOICN 包裝:剪切帶 (CT) 產(chǎn)品目錄頁面:680 (CN2011-ZH PDF) 其它名稱:MCP6L04T-E/SLCT |
| EL2228CS-T13 | 功能描述:IC AMP DUAL LOW NOISE 8-SOIC RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝:1 系列:- 放大器類型:通用 電路數(shù):4 輸出類型:滿擺幅 轉(zhuǎn)換速率:0.6 V/µs 增益帶寬積:1MHz -3db帶寬:- 電流 - 輸入偏壓:2pA 電壓 - 輸入偏移:1000µV 電流 - 電源:85µA 電流 - 輸出 / 通道:20mA 電壓 - 電源，單路/雙路(±):1.8 V ~ 6 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:14-SOIC（0.154"，3.90mm 寬） 供應商設備封裝:14-SOICN 包裝:剪切帶 (CT) 產(chǎn)品目錄頁面:680 (CN2011-ZH PDF) 其它名稱:MCP6L04T-E/SLCT |
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