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參數(shù)資料
| 型號(hào)： | ISL55004IBZ-T7 |
| 廠商： | Intersil |
| 文件頁(yè)數(shù)： | 12/12頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC OPAMP 200MHZ UNITYGAIN 14SOIC |
| 產(chǎn)品培訓(xùn)模塊： | Solutions for Industrial Control Applications |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 放大器類型： | 電壓反饋 |
| 電路數(shù)： | 4 |
| 轉(zhuǎn)換速率： | 300 V/µs |
| 增益帶寬積： | 70MHz |
| -3db帶寬： | 200MHz |
| 電流 - 輸入偏壓： | 600nA |
| 電壓 - 輸入偏移： | 1200µV |
| 電流 - 電源： | 8.5mA |
| 電流 - 輸出 / 通道： | 140mA |
| 電壓 - 電源，單路/雙路(±)： | 4.5 V ~ 30 V，±2.25 V ~ 15 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 14-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 14-SOIC |
| 包裝： | 標(biāo)準(zhǔn)包裝 |
| 其它名稱： | ISL55004IBZ-T7DKR |
9
FN6219.2
July 27, 2006
For sourcing:
For sinking:
Where:
VS = Supply voltage
ISMAX = Maximum quiescent supply current
VOUT = Maximum output voltage of the application
RLOAD = Load resistance tied to ground
ILOAD = Load current
N = number of amplifiers (max = 4)
By setting the two PDMAX equations equal to each other, we
can solve the output current and RLOAD to avoid the device
overheat.
Caution: For supply voltages greater then 20V, the
maximum power dissipation at 85°C ambient temperature
could be exceeded. For higher supply voltages the
maximum ambient temperature must be de-rated according
to the Package Power Dissipation curve Figure 27. The
maximum power dissipation is highly dependent upon the
thermal conductivity of the PCB. For lower thermal
conductivity boards use Figure 26.
Power Supply Bypassing Printed Circuit Board
Layout
As with any high frequency device, a good printed circuit
board layout is necessary for optimum performance. 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 VS- 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 VS- pin becomes the negative
supply rail.
Printed Circuit Board Layout
For good AC performance, parasitic capacitance should be
kept to minimum. Use of wire wound resistors should be
avoided because of their additional series inductance. Use
of sockets should also be avoided if possible. Sockets add
parasitic inductance and capacitance that can result in
compromised performance. Minimizing parasitic capacitance
at the amplifier's inverting input pin is very important. The
feedback resistor should be placed very close to the
inverting input pin. Strip line design techniques are
recommended for the signal traces.
Application Circuits
Sallen Key Low Pass Filter
A common and easy to implement filter taking advantage of
the wide bandwidth, low offset and low power demands of
the ISL55004. A derivation of the transfer function is
provided for convenience (See Figure 28).
Sallen Key High Pass Filter
Again this useful filter benefits from the characteristics of the
ISL55004. The transfer function is very similar to the low
pass so only the results are presented (See Figure 29).
PD
MAX
V
S
I
SMAX
V
S
V
OUTi
–
()
i1
=
n
∑
V
OUTi
R
Li
-----------------
×
+
×
=
PD
MAX
V
S
I
SMAX
V
OUTi
V
S
–
()
i1
=
n
∑
I
LOADi
×
+
×
=
ISL55004
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