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參數(shù)資料
| 型號： | ISL55100BIRZ |
| 廠商： | INTERSIL CORP |
| 元件分類： | 外設(shè)及接口 |
| 英文描述： | Quad 18V Pin Electronics Driver/Window Comparator |
| 中文描述： | 0.6 A 4 CHANNEL, BUF OR INV BASED PRPHL DRVR, PQCC72 |
| 封裝： | 10 X 10 MM, ROHS COMPLIANT, PLASTIC, MO-220VNND-3, QFN-72 |
| 文件頁數(shù)： | 8/13頁 |
| 文件大?。?/td> | 497K |
| 代理商： | ISL55100BIRZ |
8
FN6229.0
March 17, 2006
comparators respectively. COMP HIGH and COMP LOW set
all the comparator output levels, and COMP HIGH must be
more positive than COMP LOW. These two inputs are
unbuffered supply pins, so the sources driving these pins
must provide adequate current for the expected load. COMP
HIGH and COMP LOW typically connect to the power
supplies of the logic device driven by the comparator outputs.
The truth table for the receivers is given on page 3. Receiver
outputs cannot be placed in a HIZ state, and do not
incorporate any on-chip short circuit current protection.
Momentary short circuits to GND, or any supply voltage, won’t
cause permanent damage, but care must be taken to avoid
longer duration short circuits. If tolerable to the application,
current limiting resistors can be inserted in series with the
QA(0-3) and QB(0-3) outputs to protect the receiver outputs
from damage due to overcurrent conditions.
Driver Features
The drivers are single ended outputs featuring a wide
voltage range, an output stage capable of delivering 125mA
while providing a low out resistance and HIZ capability. The
driver output can be toggled to drive one of two user defined
output levels High (VH) or Low (VL).
Driver waveforms are greatly affected by load
characteristics. The ISL55100B actually double bonds the
VH(0-3) and VL(0-3) supply pins for each channel. The
Driver Output Pins (DOUT(0-3)) are triple bonded. Multiple
bond wires help reduce the effects of Inductance between
the IC Die (Wafer) and the packaging. Also the QFN style of
packaging reduces inductance over other types of
packaging.
While the inductance of a bond wire might seem
insignificant, it can reduce high-frequency waveform fidelity.
So this should be borne in mind when doing PCB layout and
DUT interconnect. Lead lengths should be kept as short as
possible, maintaining as much decoupling on the drive rails
as possible and make sure scope measurements are made
properly. Often the inductance of a scope probe ground can
be the actual cause of the waveform distortion.
VH and VL (Driver Output Rails)
Sets of VH and VL pins are designated for each Driver.
These are unbuffered analog inputs that determine the Drive
High (VH) and Drive Low (VL) Voltages that the drivers will
deliver. These inputs are double bonded to reduce
inductance and decrease AC Impedance.
Each VH and VL should be decoupled with 4.7μF and 0.1μF
capacitors to ground. If all four Driver VH/VLs are bussed,
then one 4.7μF can be used. Layouts should also
accommodate the placement of capacitance “across” VH
and VL. So in addition to decoupling the VH/VL pins to
ground, they are also decoupled to each other.
Logic Inputs
The ISL55100B uses differential mode digital inputs, and can
therefore mate directly with LVDS or CML outputs. Single
ended logic families are handled by connecting one of the
digital input pins to an appropriate threshold voltage (e.g.,
1.4V for TTL compatibility).
LOSWING Circuit Option
The drivers include switchable circuitry that is optimized for
either low (VH-VL < 3V) or high output swings. Configuring
the part is accomplished via the LOSWING pin. Connecting
LOSWING to V
EE
selects the circuits optimized for low
overshoots at low swing operation. Connecting the pin to
V
CC
enables the large signal circuitry. (See Figure 6)
With LOSWING = V
EE
, the low swing circuitry activates
whenever VH < V
EE
+ 5V. Set LOSWING = V
EE
only if the
output swing (VH-VL) is less than 3V, and better than 10%
overshoots are required.
For the best small ( low swing) signal performance, the
VH/VL common mode voltage [(VH + VL)/2] must be V
EE
+
1.5V. So if V
EE
= 0V, and the desired swing is 500mV, set
VH = 1.75V, and VL = 1.25V.
Driver and Receiver Overload Protection
The ISL55100 is designed to provide minimum and balanced
Driver ROUT. Great care should be taken when making use
of the ISL55100B low ROUT drivers as there is no internal
protection. There is no short circuit protection built into either
the driver or the receiver/comparator outputs. Also there are
no junction temperature monitors or thermal shutdown
features.
The driver or receiver outputs may be damaged by more
than a momentary short circuit directly to any low impedance
voltage. Driver Protection can be obtained with a 50
Series
Termination Resistor that is properly rated.
External Logic Supply Option
(V
EXT
)
Connection of the V
EXT
Pin to a 5.5V DC Source
(Referenced to V
EE
) will reduce the V
CC
-V
EE
current drain.
Current drain is directly proportional to Data Rate. This
option will help with Power Supply/Dissipation should heat
distribution become an issue.
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 V
EE
pin is
connected to ground, one 0.1μF ceramic capacitor should be
placed from the V
CC
pin to ground. A 4.7μF tantalum
capacitor should then be connected from the V
CC
pin to
ground. This same capacitor combination should be placed
at each supply pin to ground if split supplies are to be used.
ISL55100B
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| ISL55100BIRZ-T | 功能描述:IC COMP DRVR/WINDOW 18V 72-QFN RoHS:是 類別:集成電路 (IC) >> 接口 - 驅(qū)動器，接收器，收發(fā)器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:發(fā)射器 驅(qū)動器/接收器數(shù):4/0 規(guī)程:RS422，RS485 電源電壓:4.75 V ~ 5.25 V 安裝類型:表面貼裝 封裝/外殼:16-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:16-SOIC 包裝:帶卷 (TR) |
| ISL55110 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Dual, High Speed MOSFET Driver |
| ISL55110_0712 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Dual, High Speed MOSFET Driver |
| ISL55110_11 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Dual, High Speed MOSFET Driver |
| ISL55110EVAL1Z | 功能描述:電源管理IC開發(fā)工具 ISL59532IKEZ32X32VID CROSPNT SNGL END IN RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
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