FN7177.2 March 31, 2011 Description of Operation and Applications Information Product Description The EL5144 series is a f" />
參數(shù)資料
型號(hào)： EL5244CYZ-T13
廠商： Intersil
文件頁(yè)數(shù)： 8/24頁(yè)
文件大?。?/td> 0K
描述： IC AMP VFA DUAL 100MHZ 8-MSOP
標(biāo)準(zhǔn)包裝： 2,500
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： 200 V/µs
增益帶寬積： 60MHz
-3db帶寬： 100MHz
電流 - 輸入偏壓： 2nA
電壓 - 輸入偏移： 25000µV
電流 - 電源： 7mA
電流 - 輸出 / 通道： 120mA
電壓 - 電源，單路/雙路(±)： 4.75 V ~ 5.25 V，±2.38 V ~ 2.63 V
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 10-TFSOP，10-MSOP（0.118"，3.00mm 寬）
供應(yīng)商設(shè)備封裝： 8-MSOP
包裝： 帶卷 (TR)
16
FN7177.2
March 31, 2011
Description of Operation and Applications
Information
Product Description
The EL5144 series is a family of wide bandwidth, single
supply, low power, rail-to-rail output, voltage feedback
operational amplifiers. The family includes single, dual, and
quad configurations. The singles and duals are available
with a power-down pin to reduce power to 2.6A typically. All
the amplifiers are internally compensated for closed loop
feedback gains of +1 or greater. Larger gains are acceptable
but bandwidth will be reduced according to the familiar Gain
Bandwidth Product.
Connected in voltage follower mode and driving a high
impedance load, the EL5144 series has a -3dB bandwidth of
100MHz. Driving a 150
Ω load, they have a -3dB bandwidth
of 60MHz while maintaining a 200V/s slew rate. The input
common mode voltage range includes ground while the
output can swing rail-to-rail.
Power Supply Bypassing and Printed Circuit
Board Layout
As with any high-frequency device, good printed circuit
board layout is necessary for optimum performance. Ground
plane construction is highly recommended. Lead lengths
should be as short as possible. The power supply pin must
be well bypassed to reduce the risk of oscillation For normal
single supply operation, where the GND pin is connected to
the ground plane, a single 4.7F tantalum capacitor in
parallel with a 0.1F ceramic capacitor from VS to GND will
suffice. This same capacitor combination should be placed
at each supply pin to ground if split supplies are to be used.
In this case, the GND pin becomes the negative supply rail.
For good AC performance, parasitic capacitance should be
kept to a minimum. Use of wire wound resistors should be
avoided because of their additional series inductance. Use
of sockets, particularly for the SO package, should be
avoided if possible. Sockets add parasitic inductance and
capacitance that can result in compromised performance.
Input, Output and Supply Voltage Range
The EL5144 series has been designed to operate with a
single supply voltage of 5V. Split supplies can be used so
long as their total range is 5V.
The amplifiers have an input common mode voltage range
that includes the negative supply (GND pin) and extends to
within 1.5V of the positive supply (VS pin). They are
specified over this range.
The output of the EL5144 series amplifiers can swing rail to
rail. As the load resistance becomes lower in value, the
ability to drive close to each rail is reduced. However, even
with an effective 150
Ω load resistor connected to a voltage
halfway between the supply rails, the output will swing to
within 150mV of either rail.
Figure 48 shows the output of the EL5144 series amplifier
swinging rail to rail with RF = 1kΩ, AV = +2 and RL = 1MΩ.
Figure 49 is with RL = 150Ω.
2
3
CEA
Enable Amplifier A
(Enabled when high)
(Reference Circuit 3)
4
5
CEB
Enable Amplifier B
(Enabled when high)
(Reference Circuit 3)
1, 5
2, 6,
10, 12
NC
No Connect.
Not internally
connected.
Pin Descriptions (Continued)
EL5144
5 Ld
SOT23
EL5146
8 Ld
SO/PDIP
EL5244
8 Ld SO/
PDIP/MSOP
EL5246
10 Ld
MSOP
EL5246
14 Ld
SO/PDIP
EL5444
14 Ld
SO/PDIP
EL5444
16 Ld
QSOP NAME
FUNCTION
EQUIVALENT CIRCUIT
0V
5V
FIGURE 48.
0V
5V
FIGURE 49.
EL5144, EL5146, EL5244, EL5246, EL5444
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