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參數(shù)資料
| 型號(hào)： | EL5421TIYZ-T7 |
| 廠商： | Intersil |
| 文件頁(yè)數(shù)： | 2/13頁(yè) |
| 文件大小： | 0K |
| 描述： | IC BUFFER R-R 12MHZ 10MSOP |
| 標(biāo)準(zhǔn)包裝： | 1,500 |
| 放大器類型： | 緩沖器 |
| 電路數(shù)： | 4 |
| 輸出類型： | 滿擺幅 |
| 轉(zhuǎn)換速率： | 12 V/µs |
| -3db帶寬： | 12MHz |
| 電流 - 輸入偏壓： | 2nA |
| 電壓 - 輸入偏移： | 4000µV |
| 電流 - 電源： | 550µA |
| 電流 - 輸出 / 通道： | 70mA |
| 電壓 - 電源，單路/雙路(±)： | 4.5 V ~ 19 V，±2.25 V ~ 9.5 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： | 10-MSOP |
| 包裝： | 帶卷 (TR) |
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10
FN6922.0
September 25, 2009
Applications Information
Product Description
The EL5421T is a high voltage rail-to-rail input-output buffer
with low power consumption. The EL5421T contains four
buffers. Each buffer exhibits beyond the rail input capability,
rail-to-rail output capability and is unity gain stable.
The EL5421T features a slew rate of 12V/s. Also, the
device provides common mode input capability beyond the
supply rails, rail-to-rail output capability, and a bandwidth of
12MHz (-3dB). This enables the buffers to offer maximum
dynamic range at any supply voltage.
Operating Voltage, Input and Output Capability
The EL5421T can operate on a single supply or dual supply
configuration. The EL5421T operating voltage ranges from a
minimum of 4.5V to a maximum of 19V. This range allows for
a standard 5V (or ±2.5V) supply voltage to dip to -10%, or a
standard 18V (or ±9V) to rise by +5.5% without affecting
performance or reliability.
The input common-mode voltage range of the EL5421T
extends 500mV beyond the supply rails. Also, the EL5421T
is immune to phase reversal. However, if the common mode
input voltage exceeds the supply voltage by more than 0.5V,
electrostatic protection diodes in the input stage of the
device begin to conduct. Even though phase reversal will not
occur, to maintain optimal reliability it is suggested to avoid
input overvoltage conditions. Figure 25 shows the input
voltage driven 500mV beyond the supply rails and the device
output swinging between the supply rails.
The EL5421T output typically swings to within 50mV of
positive and negative supply rails with load currents of
±5mA. Decreasing load currents will extend the output
voltage range even closer to the supply rails. Figure 26
shows the input and output waveforms for the device in a
unity-gain configuration. Operation is from ±5V supply with a
10k
Ω load connected to GND. The input is a 10V
P-P
sinusoid and the output voltage is approximately 9.9VP-P.
Refer to the “Electrical Specifications” Table beginning on
page 2 for specific device parameters. Parameter variations
with operating voltage, loading and/or temperature are
shown in the “Typical Performance Curves” on page 5.
Output Current
The EL5421T is capable of output short circuit currents of
200mA (source and sink), and the device has built-in
protection circuitry which limits the short circuit current to
±200mA (typical).
To maintain maximum reliability the continuous output
current should never exceed ±70mA. This ±70mA limit is
determined by the characteristics of the internal metal
interconnects. Also, see “Power Dissipation” on page 11 for
detailed information on ensuring proper device operation
and reliability for temperature and load conditions.
Unused Buffers
It is recommended that any unused buffers have their inputs
tied to the ground plane.
Driving Capacitive Loads
As load capacitance increases, the -3dB bandwidth will
decrease and peaking can occur. Depending on the
application, it may be necessary to reduce peaking and to
improve device stability. To improve device stability a
snubber circuit or a series resistor may be added to the
output of the EL5421T.
A snubber is a shunt load consisting of a resistor in series
with a capacitor. An optimized snubber can improve the
FIGURE 25. OPERATION WITH BEYOND-THE-RAILS INPUT
1V
/DI
V
VS = ±2.5V, TA = +25°C, VINx = 6VP-P, RL = 10kΩ to GND
INPUT
OUTPUT
100
s/DIV
FIGURE 26. OPERATION WITH RAIL-TO-RAIL INPUT AND
VS = ±5V, TA = +25°C, VINx = 10VP-P, RL = 10kΩ to GND
5V
/DI
V
INPUT
OUT
P
UT
100
s/DIV
EL5421T
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