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參數(shù)資料
| 型號： | EL5427CRZ-T7 |
| 廠商： | Intersil |
| 文件頁數(shù)： | 5/17頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC BUFFER LP 12CH 2.5MHZ 28TSSOP |
| 標(biāo)準(zhǔn)包裝： | 1,000 |
| 放大器類型： | 緩沖器 |
| 電路數(shù)： | 12 |
| 輸出類型： | 滿擺幅 |
| 轉(zhuǎn)換速率： | 2.2 V/µs |
| -3db帶寬： | 2.5MHz |
| 電流 - 輸入偏壓： | 2nA |
| 電壓 - 輸入偏移： | 1000µV |
| 電流 - 電源： | 1.6mA |
| 電流 - 輸出 / 通道： | 120mA |
| 電壓 - 電源，單路/雙路(±)： | 4.5 V ~ 16.5 V，±2.25 V ~ 8.25 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 28-TSSOP（0.173"，4.40mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 28-TSSOP |
| 包裝： | 帶卷 (TR) |
13
FN7111.4
May 4, 2007
Driving Capacitive Loads
The EL5127, EL5227, EL5327, and EL5427 can drive a wide
range of capacitive loads. As load capacitance increases,
however, the -3dB bandwidth of the device will decrease and
the peaking increase. The buffers drive 10pF loads in
parallel with 10k
Ω with just 1.5dB of peaking, and 100pF
with 6.4dB of peaking. If less peaking is desired in these
applications, a small series resistor (usually between 5
Ω and
50
Ω) can be placed in series with the output. However, this
will obviously reduce the gain slightly. Another method of
reducing peaking is to add a “snubber” circuit at the output.
A snubber is a shunt load consisting of a resistor in series
with a capacitor. Values of 150
Ω and 10nF are typical. The
advantage of a snubber is that it does not draw any DC load
current or reduce the gain.
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, and the power supply pins
must be well bypassed to reduce the risk of oscillation. For
normal single supply operation, where the VS- pin is
connected to ground, a 0.1F ceramic capacitor should be
placed from VS+ pin to VS- pin. A 4.7F tantalum capacitor
should then be connected from VS+ pin to ground. One
4.7F capacitor may be used for multiple devices. This same
capacitor combination should be placed at each supply pin
to ground if split supplies are to be used.
EL5127, EL5227, EL5327, EL5427
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