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参数资料
| 型号： | LTC1043CSW#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 7/16页 |
| 文件大小： | 0K |
| 描述： | IC BUILDNG BLK SW-CAP DUAL18SOIC |
| 标准包装： | 1,000 |
| 应用： | 仪表 |
| 输入电压： | 3 V ~ 18 V |
| 输出数： | 2 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 18-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 18-SOIC |
| 包装： | 带卷 (TR) |
LTC1043
APPLICATIO S I FOR ATIO
recover from the latch mode when the input drops 3V to 4V
below the voltage value which caused the latch. For
instance, if an external resistor of 200 ? is connected in
series with an input pin, the input can be taken 1.3V above
the supply without latching the IC. The same applies for the
C + and C – pins.
C OSC Pin (16), Figure 6
The Cosc pin can be used with an external capacitor, Cosc,
connected from Pin 16 to Pin 17, to modify the internal
with an external clock to override the internal oscillator.
Although standard 7400 series CMOS gates do not
guarantee CMOS levels with the current source and sink
requirements of Pin 16, they will in reality drive the Cosc
pin. CMOS gates conforming to standard B series output
drive have the appropriate voltage levels and more than
enough output current to simultaneously drive several
LTC1043 C OSC pins. The typical trip levels of the Schmitt
trigger (Figure 6) are given below.
oscillator frequency. If Pin 16 is floating, the internal 24pF
SUPPLY
TRIP LEVELS
capacitor, plus any external interpin capacitance, set the
V + = 5V,
V – = 0V
V H = 3.4VV L = 1.35V
oscillator frequency around 190kHz with ± 5V supply. The
typical performance characteristics curves provide the
necessary information to set the oscillator frequency for
various power supply ranges. Pin 16 can also be driven
12
V+ = 15V
V– = 0V
10
8
V+ = 10V
V– = 0V
6
V + = 10V, V – = 0V
V + = 15V, V – = 0V
V H = 6.5VV L = 2.8V
V H = 9.5VV L = 4.1V
1
4
2
V+ = 5V
V– = 0V
OUTSIDE FOIL
C S
2
3
0
0
2
4
6
8
V IN (V)
10
12
14
16
PRINTED CIRCUIT
BOARD AREA
LTC1043
LTC1043 ? AI05
LTC1043 ? AI04
Figure 4. Individual Switch Charge Injection
vs Input Voltage
V+
4
38 μ F
Figure 5. Printed Circuit Board Layout
Showing Shielding the Sampling Capacitor
C OSC
(EXTERNAL)
C OSC
16
24pF
17
V–
TO CLK GENERATOR
f OSC = 190kHz ?
(24pF)
(24pF + C OSC )
LTC1043 * AI06
Figure 6. Internal Oscillator
1043fa
7
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