参数资料
型号: LT1677CN8
厂商: LINEAR TECHNOLOGY CORP
元件分类: 运动控制电子
英文描述: Low Noise, Rail-to-Rail Precision Op Amp
中文描述: OP-AMP, 120 uV OFFSET-MAX, 6.2 MHz BAND WIDTH, PDIP8
封装: 0.300 INCH, PLASTIC, DIP-8
文件页数: 12/16页
文件大小: 239K
代理商: LT1677CN8
12
LT1677
APPLICATIOU
voltage noise of the op amp, i.e., the low voltage noise
specification is completely wasted. In this region the
LT1792 or LT1793 is the best choice.
W
U
U
Microvolt Comparator with Hysteresis
+
LT1677
3
7
1677 TA02
4
6
8
2
15V
–15V
OUTPUT
POSITIVE FEEDBACK TO ONE OF THE NULLING TERMINALS
CREATES APPROXIMATELY 5
μ
V OF HYSTERESIS. OUTPUT
CAN SINK 16mA
INPUT OFFSET VOLTAGE IS TYPICALLY CHANGED LESS THAN
5
μ
V DUE TO THE FEEDBACK
INPUT
10M
5%
365
1%
15k
1%
TYPICAL APPLICATIO
U
Rail-to-Rail Input
The LT1677 has the lowest voltage noise, offset voltage
and highest gain when compared to any rail-to-rail op
amp. The input common mode range for the LT1677 can
exceed the supplies by at least 100mV. As the common
mode voltage approaches the positive rail (V
CC
– 0.7V),
the tail current for the input pair (Q1, Q2) is reduced,
which prevents the input pair from saturating (refer to the
Simplified Schematic). The voltage drop across the load
resistors R
C1
, R
C2
is reduced to less than 200mV, degrad-
ing the slew rate, bandwidth voltage noise, offset voltage
and input bias current (the cancellation is shut off).
When the input common mode range goes below 1.5V
above the negative rail, the NPN input pair (Q1, Q2) shuts
off and the PNP input pair (Q8, Q9) turns on. The offset
voltage, input bias current, voltage noise and bandwidth
are also degraded. The graph of Offset Voltage vs Com-
mon Mode Range shows where the knees occur by
displaying the change in offset voltage. The change-over
points are temperature dependent, see Common Mode
Range vs Temperature.
相关PDF资料
PDF描述
LT1677CS8 Low Noise, Rail-to-Rail Precision Op Amp
LT1677I Low Noise, Rail-to-Rail Precision Op Amp
LT1678 Dual/Quad Low Noise, Rail-to-Rail, Precision Op Amps
LT1678IS8 Dual/Quad Low Noise, Rail-to-Rail, Precision Op Amps
LT1679IS Dual/Quad Low Noise, Rail-to-Rail, Precision Op Amps
相关代理商/技术参数
参数描述
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