参数资料
型号: AMP02FPZ
厂商: Analog Devices Inc
文件页数: 2/12页
文件大小: 0K
描述: IC AMP INST PREC LDRIFT 8DIP
标准包装: 50
放大器类型: 仪表
电路数: 1
转换速率: 6 V/µs
-3db带宽: 1.2MHz
电流 - 输入偏压: 4nA
电压 - 输入偏移: 40µV
电流 - 电源: 5mA
电流 - 输出 / 通道: 32mA
电压 - 电源,单路/双路(±): ±4.5 V ~ 18 V
工作温度: -40°C ~ 85°C
安装类型: 通孔
封装/外壳: 8-DIP(0.300",7.62mm)
供应商设备封装: 8-PDIP
包装: 管件
产品目录页面: 771 (CN2011-ZH PDF)
REV. E
–10–
AMP02
Overvoltage Protection
Instrumentation amplifiers invariably sit at the front end of
instrumentation systems where there is a high probability of
exposure to overloads. Voltage transients, failure of a transducer,
or removal of the amplifier power supply while the signal source is
connected may destroy or degrade the performance of an unpro-
tected device. A common technique is to place limiting resistors in
series with each input, but this adds noise. The AMP02 includes
internal protection circuitry that limits the input current to
±4 mA
for a 60 V differential overload (see Figure 5) with power off,
±2.5 mA with power on.
DIFFERENTIAL INPUT VOLTAGE
4
–100
LEAKA
GE
CURRENT
mA
3
1
–1
–3
–4
2
0
–2
–80
–60
–40
–20
0
20
40
60
80
100
POWER ON
POWER OFF
TA = 25 C
VS = 15V
Figure 5. AMP02’s Input Protection Circuitry Limits Input
Current During Overvoltage Conditions
Power Supply Considerations
Achieving the rated performance of precision amplifiers in a
practical circuit requires careful attention to external influences.
For example, supply noise and changes in the nominal voltage
directly affect the input offset voltage. A PSR of 80 dB means
that a change of 100 mV on the supply (not an uncommon
value) will produce a 10
V input offset change. Consequently,
care should be taken in choosing a power unit that has a low
output noise level, good line and load regulation, and good
temperature stability. In addition, each power supply should be
properly bypassed.
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