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參數(shù)資料
| 型號： | CS8415A-CZZ |
| 廠商： | Cirrus Logic Inc |
| 文件頁數(shù)： | 8/11頁 |
| 文件大小： | 0K |
| 描述： | IC 96KHZ DGTL RCVR 28-TSSOP |
| 標(biāo)準(zhǔn)包裝： | 50 |
| 類型： | 數(shù)字音頻接口接收器 |
| 應(yīng)用： | 車載音頻 |
| 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： | 管件 |
| 其它名稱： | 598-1122-5 |
Micrel, Inc.
MIC841/842
October 29, 2013
6
Revision 4.1
Application Information
Output
The MIC841N and MIC842N outputs are an open-drain
MOSFET, so most applications will require a pull-up
resistor. The value of the resistor should not be too large
or leakage effects may dominate. 470kΩ is the maximum
recommended value. Note that the output of “N” version
may be pulled up as high as 6V regardless of the ICs
supply voltage. The “H” and “L” versions of the MIC841
and MIC842 have a push-pull output stage, with a diode
clamped to VDD. Thus, the maximum output voltage of
the
“H”
and
“L”
versions
is
When working with large resistors on the input to the
devices, a small amount of leakage current can cause
voltage offsets that degrade system accuracy. The
maximum recommended total resistance from VIN to
ground is 3MΩ. The accuracy of the resistors can be
chosen based upon the accuracy required by the system.
The inputs may be subjected to voltages as high as 6V
steady-state
without
adverse
effects
of
any
kind
regardless of the ICs supply voltage. This applies even if
the supply voltage is zero. This permits the situation in
which the IC’s supply is turned off, but voltage is still
present on the inputs (see Electrical Characteristics).
Programming the MIC841 Thresholds
The low-voltage threshold is calculated using Equation 1:
VIN(LO) = VREF
+
3
R
2
R
3
R
2
R
1
R
Eq. 1
The high-voltage threshold is calculated using Equation
2:
VIN(HI) = VREF
+
3
R
3
R
2
R
1
R
Eq. 2
Where, for both equations:
VREF = 1.240V
In order to provide the additional criteria needed to solve
for the resistor values, the resistors can be selected such
that they have a given total value, that is, R1 + R2 + R3 =
RTOTAL. A value such as 1M for RTOTAL is a reasonable
value because it draws minimum current but has no
significant effect on accuracy.
Figure 1. MIC841 Example Circuit
Once the desired trip points are determined, set the VIN(HI)
threshold first.
For example, use a total of 1M
= R1 + R2 + R3. For a
typical single-cell lithium ion battery, 3.6V is a good “high
threshold” because at 3.6V the battery is moderately
charged. Solving for R3:
VIN(HI) = 3.6V = 1.24V
3
R
M
1
Eq. 3
Where:
R3 = 344k
Once R3 is determined, the equation for VIN(LO) can be
used to determine R2. A single lithium-ion cell, for
example, should not be discharged below 2.5V. Many
applications limit the drain to 3.1V.
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|---|---|
| CS8415ACZZR | 制造商:Cirrus Logic 功能描述: |
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