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參數(shù)資料
| 型號(hào)： | MCP601-IP |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | 2.7V to 5.5V Single Supply CMOS Op Amps |
| 中文描述： | 2.7V至5.5V單電源CMOS運(yùn)算放大器 |
| 文件頁數(shù)： | 12/20頁 |
| 文件大?。?/td> | 448K |
| 代理商： | MCP601-IP |
MCP601/602/603/604
DS21314D-page 12
2000 Microchip Technology Inc.
3.4
The Chip Select Option of the MCP603
The MCP603 is a single amplifier with a Chip Select
option. When CS is pulled high the supply current
drops to 0.7
μ
A (typ), which is pulled through the CS pin
to V
SS
. In this state, the amplifier is put into a high
impedance state. By pulling CS low or letting the pin
float, the amplifier is enabled. Figure 3-6 shows the out-
put voltage and supply current response to a CS pulse.
FIGURE 3-6:
Timing Diagram for the CS Function of the MCP603 Amplifier
3.5
Layout Considerations
In applications where low input bias current is critical,
PC board surface leakage effects and signal coupling
from trace to trace need to be taken into consideration.
3.5.1
SURFACE LEAKAGE
Surface leakage across a PC board is a consequence
of differing DC voltages between two traces combined
with high humidity, dust or contamination on the board.
For instance, the typical resistance from PC board
trace to pad is approximately 10
12
under low humidity
conditions. If an adjacent trace is biased to 5V and the
input pin of the amplifier is biased at or near zero volts,
a 5pA leakage current will appear on the amplifier
’
s
input node. This type of PCB leakage is five times the
room temperature input bias current (1pA, typ) of the
MCP601/602/603/604 family of amplifiers.
The simplest technique that can be used to reduce the
effects of PC board leakage is to design a ring around
sensitive pins and traces. An example of this type of
layout is shown in Figure 3-7.
FIGURE 3-7:
MCP601, the A-amplifier of the MCP602 or the
MCP603 in a PC Board Layout
Example of Guard Ring for the
V
IL
Hi-Z
t
ON
V
IH
t
OFF
Hi-Z
Output
2.0nA (typ)
2.0nA (typ)
V
DD
Supply
Current
230
μ
A (typ)
0.7
μ
A (typ)
0.7
μ
A (typ)
GND
Current
230
μ
A (typ)
0.7
μ
A (typ)
0.7
μ
A (typ)
CS
Current
2nA(typ)
CS
-In
+In
V-
Guard Ring
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MCP601-ISN | 300000 SYSTEM GATE 2.5 VOLT FPGA - NOT RECOMMENDED for NEW DESIGN |
| MCP601-IST | 300000 SYSTEM GATE 2.5 VOLT FPGA - NOT RECOMMENDED for NEW DESIGN |
| MCP602 | 2.7V to 5.5V Single Supply CMOS Op Amps |
| MCP602-I | 2.7V to 5.5V Single Supply CMOS Op Amps |
| MCP602-IOT | 300000 SYSTEM GATE 2.5 VOLT FPGA - NOT RECOMMENDED for NEW DESIGN |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MCP601-ISL | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:2.7V to 5.5V Single Supply CMOS Op Amps |
| MCP601-ISN | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:2.7V to 6.0V Single Supply CMOS Op Amps |
| MCP601-IST | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:2.7V to 5.5V Single Supply CMOS Op Amps |
| MCP601R | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:2.7V to 6.0V Single Supply CMOS Op Amps |
| MCP601RT | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:2.7V to 5.5V Single-Supply CMOS Op Amps |
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