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參數(shù)資料
| 型號： | ISO166P |
| 英文描述： | Precision, Isolated OPERATIONAL AMPLIFIER |
| 中文描述： | 精密，隔離運算放大器 |
| 文件頁數(shù)： | 6/8頁 |
| 文件大?。?/td> | 202K |
| 代理商： | ISO166P |
6
ISO166/ISO176
MOD
Shield 1
Ext Osc
+V
S1
+V
S2
GND 1
20
–V
S1
3
–V
S2
13
–V
S2
+V
S2
–V
S1
+V
S1
V
IN+
R
LOAD
GND 2
12
23
5
22
0.1μF
1μF
4
15
Shield 2
OUT
Com2
14
11
10
V
OUT
V
IN–
V
IN+
21
2
24
1
Com 1
1μF
0.1μF
1μF
0.1μF
0.1μF
1μF
–
+
–
+
–
+
–
+
INPUT BIAS CURRENT CANCELLATION
The input stage base current of the uncommitted op amp is
internally compensated with an equal and opposite cancella-
tion current. The resulting input bias current is the difference
between the input stage base current and the cancellation
current. This residual input bias current can be positive or
negative.
When the bias current is cancelled in this manner, the input
bias current and input offset current are approximately the
same magnitude. As a result, it is not necessary to balance
the DC resistance seen at the two input terminals.
A resistor
added to balance the input resistances may actually
increase offset and noise.
SYNCHRONIZED OPERATION
ISO166 and ISO176 can be synchronized to an external
signal source. This capability is useful in eliminating trouble-
some beat frequencies in multichannel systems and in reject-
ing AC signals and their harmonics. To use this feature, an
external signal must be applied to the Ext Osc pin. ISO166
can be synchronized over the 100kHz to 200kHz range and
ISO176 can be synchronized over the 400kHz to 700kHz
range.
The ideal external clock signal for ISO166 and ISO176 is a
±
4V sine wave or
±
4V, 50% duty-cycle triangle wave. The
Ext Osc pin of the ISO166 and ISO176 can be driven
directly with a
±
3V to
±
5V sine or 25% to 75% duty-cycle
triangle wave and the ISO amp’s internal modulator/de-
modulator circuitry will synchronize to the signal.
BASIC OPERATION
ISO166 and ISO176 isolation amplifiers are comprised of a
precision uncommitted operational amplifier followed by an
isolation amplifier. The input and output isolation sections
are galvanically isolated by matched and EMI shielded
capacitors.
Signal and Power Connections
Figure 1 shows power and signal connections. Each power
supply pin should be bypassed with a 1
μ
F tantalum capaci-
tor located as close to the amplifier as possible. All ground
connections should be run independently to a common
point. Signal Common on both input and output sections
provide a high-impedance point for sensing signal ground in
noisy applications. Com 1 and Com 2 must have a path to
ground for bias current return and should be maintained
within
±
1V of GND1 and GND2, respectively.
INPUT PROTECTION
The amplifier inputs of ISO166 and ISO176 are protected
with 500
series input resistors and diode clamps. The
inputs can withstand
±
30V differential inputs without dam-
age. The protection diodes will, of course, conduct current
when the inputs are over-driven. This may disturb the
slewing behavior of unity-gain follower applications, but it
will not damage the op amp. The MOD input is a 200k
resistor and can withstand
±
100V without damage.
FIGURE 1. Basic Connections.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ISO166 | |
| ISO175P | Single Supply, Rail-to-Rail, Low Cost Instrumentation Amplifier |
| ISO175 | Single Supply, Rail-to-Rail, Low Cost Instrumentation Amplifier |
| ISO176P | Precision, Isolated OPERATIONAL AMPLIFIER |
| ISO176 | |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISO16-GM-391 | 功能描述:繼電器插座與硬件 RELAY ISO x16 GADGETEER MODULE RoHS:否 制造商:TE Connectivity / Schrack 附件類型:Socket 相關(guān)繼電器系列:RP, RT, RY 端接類型:PCB 極數(shù):1 |
| ISO175 | 制造商:BB 制造商全稱:BB 功能描述:Precision, Isolated INSTRUMENTATION AMPLIFIER |
| ISO175P | 制造商:BB 制造商全稱:BB 功能描述:Precision, Isolated INSTRUMENTATION AMPLIFIER |
| ISO176 | 制造商:BB 制造商全稱:BB 功能描述:Precision, Isolated OPERATIONAL AMPLIFIER |
| ISO176P | 制造商:Texas Instruments 功能描述:ISOLATION AMPLIFIER, 16 Pin, Plastic, DIP |
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