參數(shù)資料
型號(hào): ISL28486EVAL1Z
廠商: Intersil
文件頁(yè)數(shù): 4/14頁(yè)
文件大?。?/td> 0K
描述: EVALUATION BOARD FOR ISL28486
標(biāo)準(zhǔn)包裝: 1
每 IC 通道數(shù): 4 - 四
放大器類型: 通用
輸出類型: 單端,滿擺幅
轉(zhuǎn)換速率: 0.17 V/µs
電流 - 輸出 / 通道: 31mA
工作溫度: -40°C ~ 125°C
電流供應(yīng)(主 IC): 240µA
電壓 - 電源,單路/雙路(±): 2.4 V ~ 5 V,±1.2 V ~ 2.5 V
板類型: 完全填充
已供物品:
已用 IC / 零件: ISL28486
12
FN6312.1
June 28, 2007
Current Limiting
The ISL28286 and ISL28486 have no internal current-
limiting circuitry. If the output is shorted, it is possible to
exceed the Absolute Maximum Rating for output current or
power dissipation, potentially resulting in the destruction of
the device.
Power Dissipation
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 (TJMAX) for all applications
to determine if power supply voltages, load conditions, or
package type need to be modified to remain in the safe
operating area. These parameters are related as follows:
where:
PDMAXTOTAL is the sum of the maximum power
dissipation of each amplifier in the package (PDMAX)
PDMAX for each amplifier can be calculated as follows:
where:
TMAX = Maximum ambient temperature
θ
JA = Thermal resistance of the package
PDMAX = Maximum power dissipation of 1 amplifier
VS = Supply voltage (Magnitude of V+ and V-)
IMAX = Maximum supply current of 1 amplifier
VOUTMAX = Maximum output voltage swing of the
application
RL = Load resistance
IN
V+
FIGURE 38. GUARD RING EXAMPLE FOR UNITY GAIN
AMPLIFIER
HIGH IMPEDANCE INPUT
T
JMAX
T
MAX
θ
JAxPDMAXTOTAL
()
+
=
(EQ. 1)
PD
MAX
2*V
S
I
SMAX
V
S
(
- V
OUTMAX )
V
OUTMAX
R
L
----------------------------
×
+
×
=
(EQ. 2)
ISL28286, ISL28486
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