LT1881 Просмотр технического описания (PDF) - Linear Technology
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LT1881 Datasheet PDF : 18 Pages
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LT1881/LT1882
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. Single supply operation VS = 5V, 0V; VCM = VS/2 unless otherwise noted.
(Note 5)
C/I Grades
H/MP Grades
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX MIN TYP MAX UNITS
VOS
ΔVOS/ΔT
ΔVOS /
ΔTIME
Input Offset Voltage (LT1881A)
Input Offset Voltage (LT1881/LT1882)
Input Offset Voltage Drift
(Note 6)
Long-Term Input Offset
Voltage Stability
0°C < TA < 70°C
– 40°C < TA < 85°C
0°C < TA < 70°C
– 40°C < TA < 85°C
– 40°C < TA < 125°C
– 55°C < TA < 125°C
0°C < TA < 70°C
– 40°C < TA < 85°C
– 40°C < TA < 125°C
– 55°C < TA < 125°C
25 50
l
85
l
110
30 80
l
125
l
150
l
l
l
0.3 0.8
l
0.3 0.8
l
l
0.3
μV
μV
μV
30 80
μV
μV
μV
300
μV
300
μV
0.3 0.8
0.3 0.8
μV/°C
μV/°C
μV/°C
μV/°C
0.3
μV/month
IOS
Input Offset Current (LT1881A)
0°C < TA < 70°C
– 40°C < TA < 85°C
Input Offset Current (LT1881/LT1882)
0°C < TA < 70°C
– 40°C < TA < 85°C
– 40°C < TA < 125°C
– 55°C < TA < 125°C
IB
Input Bias Current (LT1881A)
0°C < TA < 70°C
– 40°C < TA < 85°C
Input Bias Current (LT1881/LT1882)
0°C < TA < 70°C
– 40°C < TA < 85°C
– 40°C < TA < 125°C
– 55°C < TA < 125°C
Input Noise Voltage
0.1Hz to 10Hz
en
Input Noise Voltage Density
in
Input Noise Current Density
RIN
Input Resistance
f = 1kHz
f = 1kHz
Differential Mode
Common Mode
100 200
l
250
l
300
150 500
l
600
l
700
l
l
100 200
l
250
l
300
150 500
l
600
l
700
l
l
0.5
14
0.03
l
20
l
100
150 500
2000
2000
150 500
3000
3000
0.5
14
0.03
20
100
pA
pA
pA
pA
pA
pA
pA
pA
pA
pA
pA
pA
pA
pA
pA
pA
μVP-P
nV/√Hz
pA/√Hz
MΩ
GΩ
CIN
Input Capacitance
VCM
Input Voltage Range
l
2
2
pF
V– + 1.0
V+ – 1.0 V– + 1.0
V+ – 1.0
V
l V– + 1.2
V+ – 1.2 V– + 1.2
V+ – 1.2
V
CMRR Common Mode Rejection Ratio
1V < VCM < 4V
106 128
106 128
dB
1.2V < VCM < 3.8V
l 104
102
dB
PSRR Power Supply Rejection Ratio
V– = 0V, VCM = 1.5V
0°C < TA < 85°C, 2.7V < V+ < 32V l 106
dB
0°C < TA < 125°C, 2.7V < V+ < 32V l
106
dB
TA = –40°C, 3V < V+ < 32V
106
dB
TA = –55°C, 3V < V+ < 32V
106
dB
Minimum Operating Supply Voltage
l
2.4 2.7
2.4 2.7
V
18812fb
3
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