LT1125CS 查看數據表（PDF） - Linear Technology
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LT1125CS Datasheet PDF : 16 Pages
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LT1124/LT1125
PERFOR A CE CO PARISO
Table 2 summarizes the performance of the LT1124/
LT1125 compared to the low cost grades of alternate
approaches.
The comparison shows how the specs of the LT1124/
LT1125 not only stand up to the industry standard OP-27,
but in most cases are superior. Normally dual and quad
performance is degraded when compared to singles, for
the LT1124/LT1125 this is not the case.
Table 2. Guaranteed Performance, VS = ±15V, TA = 25°C, Low Cost Devices
LT1124CN8
PARAMETER/UNITS
LT1125CN
OP-27 GP
Voltage Noise, 1kHz
4.2
100% Tested
4.5
Sample Tested
Slew Rate
2.7
100% Tested
1.7
Not Tested
Gain Bandwidth Product
8.0
100% Tested
5.0
Not Tested
Offset Voltage LT1124
100
100
LT1125
140
–
Offset Current LT1124
20
75
LT1125
30
–
Bias Current
30
80
Supply Current/Amp
2.75
5.67
Voltage Gain, RL = 2k
1.5
0.7
Common Mode Rejection Ratio
106
100
Power Supply Rejection Ratio
110
94
SO-8 Package
Yes - LT1124
Yes
OP-270 GP
–
No Limit
1.7
–
No Limit
250
–
20
–
60
3.25
0.35
90
104
No
OP-470 GP
5.0
Sample Tested
1.4
–
No Limit
–
1000
–
30
60
2.75
0.4
100
105
–
UNITS
nV/√Hz
V/µs
MHz
µV
µV
nA
nA
nA
mA
V/µV
dB
dB
TYPICAL APPLICATI S
Gain 1000 Amplifier with 0.01% Accuracy, DC to 1Hz
340k
15k
20k
1%
5% TRIM
365Ω
1%
15V
6 (S0-8)
2–
8 (N8)
1/2 LT1124
3+
4
7 (SO-8)
1 (N8)
OUTPUT
INPUT
RN60C FILM RESISTORS
–15V
THE HIGH GAIN AND WIDE BANDWIDTH OF THE LT1124/LT1125, IS USEFUL IN LOW
FREQUENCY HIGH CLOSED-LOOP GAIN AMPLIFIER APPLICATIONS. A TYPICAL
PRECISION OP AMP MAY HAVE AN OPEN-LOOP GAIN OF ONE MILLION WITH 500kHz
BANDWIDTH. AS THE GAIN ERROR PLOT SHOWS, THIS DEVICE IS CAPABLE OF 0.1%
AMPLIFYING ACCURACY UP TO 0.3Hz ONLY. EVEN INSTRUMENTATION RANGE
SIGNALS CAN VARY AT A FASTER RATE. THE LT1124/LT1125 “GAIN PRECISION —
BANDWIDTH PRODUCT” IS 75 TIMES HIGHER, AS SHOWN.
1124/25 TA03
10
Gain Error vs Frequency Closed-Loop Gain = 1000
1.0
TYPICAL
PRECISION
OP AMP
0.1
LT1124/LT1125
0.01
0.001
0.1
GAIN
ERROR
=
CLOSED-LOOP GAIN
OPEN-LOOP GAIN
1
10
FREQUENCY (Hz)
100
1124/25 TA04
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