Datasheet

LT1881/LT1882
3
18812fb
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS
C/I Grades H/MP Grades
UNITSMIN TYP MAX MIN TYP MAX
V
OS
Input Offset Voltage (LT1881A)
0°C < T
A
< 70°C
–40°C < T
A
< 85°C
l
l
25 50
85
110
μV
μV
μV
Input Offset Voltage (LT1881/LT1882)
0°C < T
A
< 70°C
–40°C < T
A
< 85°C
–40°C < T
A
< 125°C
–55°C < T
A
< 125°C
l
l
l
l
30 80
125
150
30 80
300
300
μV
μV
μV
μV
μV
ΔV
OS
/ΔT
Input Offset Voltage Drift
(Note 6)
0°C < T
A
< 70°C
–40°C < T
A
< 85°C
–40°C < T
A
< 125°C
–55°C < T
A
< 125°C
l
l
l
l
0.3
0.3
0.8
0.8
0.3
0.3
0.8
0.8
μV/°C
μV/°C
μV/°C
μV/°C
ΔV
OS
/
ΔTIME
Long-Term Input Offset
Voltage Stability
0.3 0.3 μV/month
I
OS
Input Offset Current (LT1881A)
0°C < T
A
< 70°C
–40°C < T
A
< 85°C
l
l
100 200
250
300
pA
pA
pA
Input Offset Current (LT1881/LT1882)
0°C < T
A
< 70°C
–40°C < T
A
< 85°C
–40°C < T
A
< 125°C
–55°C < T
A
< 125°C
l
l
l
l
150 500
600
700
150 500
2000
2000
pA
pA
pA
pA
pA
I
B
Input Bias Current (LT1881A)
0°C < T
A
< 70°C
–40°C < T
A
< 85°C
l
l
100 200
250
300
pA
pA
pA
Input Bias Current (LT1881/LT1882)
0°C < T
A
< 70°C
–40°C < T
A
< 85°C
–40°C < T
A
< 125°C
–55°C < T
A
< 125°C
l
l
l
l
150 500
600
700
150 500
3000
3000
pA
pA
pA
pA
pA
Input Noise Voltage 0.1Hz to 10Hz 0.5 0.5 μV
P-P
e
n
Input Noise Voltage Density f = 1kHz 14 14 nV/√Hz
i
n
Input Noise Current Density f = 1kHz 0.03 0.03 pA/√Hz
R
IN
Input Resistance Differential Mode
Common Mode
l
l
20
100
20
100
MΩ
GΩ
C
IN
Input Capacitance
l
22pF
V
CM
Input Voltage Range
l
V
–
+ 1.0
V
–
+ 1.2
V+ – 1.0
V+ – 1.2
V
–
+ 1.0
V
–
+ 1.2
V+ – 1.0
V+ – 1.2
V
V
CMRR Common Mode Rejection Ratio 1V < V
CM
< 4V
1.2V < V
CM
< 3.8V
l
106
104
128 106
102
128 dB
dB
PSRR Power Supply Rejection Ratio V
–
= 0V, V
CM
= 1.5V
0°C < T
A
< 85°C, 2.7V < V
+
< 32V
0°C < T
A
< 125°C, 2.7V < V
+
< 32V
T
A
= –40°C, 3V < V
+
< 32V
T
A
= –55°C, 3V < V
+
< 32V
l
l
106
106
106
106
dB
dB
dB
dB
Minimum Operating Supply Voltage
l
2.4 2.7 2.4 2.7 V
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. Single supply operation V
S
= 5V, 0V; V
CM
= V
S
/2 unless otherwise noted.
(Note 5)