Datasheet

2
LT2078/LT2079
20789fa
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ABSOLUTE MAXIMUM RATINGS
W
WW
U
Supply Voltage ...................................................... ±22V
Differential Input Voltage ....................................... ±30V
Input Voltage ...............Equal to Positive Supply Voltage
............5V Below Negative Supply Voltage
Output Short-Circuit Duration.......................... Indefinite
Specified Temperature Range
Commercial ............................................. 0°C to 70°C
Industrial ............................................ –40°C to 85°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)..................300°C
T
JMAX
= 150°C, θ
JA
= 150°C/ W
T
JMAX
= 150°C, θ
JA
= 190°C/W
V
S
= 5V, 0V, V
CM
= 0.1V, V
O
= 1.4V, T
A
= 25°C, unless otherwise noted.
LT2078AC/LT2078AI LT2078C/LT2078I
LT2079AC/LT2079AI LT2079C/LT2079I
SYMBOL PARAMETER CONDITIONS (NOTE 2) MIN TYP MAX MIN TYP MAX UNITS
V
OS
Input Offset Voltage LT2078 30 70 40 120 µV
LT2079 35 110 40 150 µV
∆V
OS
Long Term Input Offset 0.4 0.5 µV/Mo
∆Time Voltage Stability
I
OS
Input Offset Current 0.05 0.25 0.05 0.35 nA
I
B
Input Bias Current 6 8 6 10 nA
e
n
Input Noise Voltage 0.1Hz to 10Hz (Note 3) 0.6 1.2 0.6 µV
P-P
Input Noise Voltage Density f
O
= 10Hz (Note 3) 29 45 29 nV√Hz
f
O
= 1000Hz (Note 3) 28 37 28 nV√Hz
i
n
Input Noise Current 0.1Hz to 10Hz (Note 3) 2.3 4.0 2.3 pA
P-P
Input Noise Current Density f
O
= 10Hz (Note 3) 0.06 0.10 0.06 pA√Hz
f
O
= 1000Hz 0.02 0.02 pA√Hz
Input Resistance (Note 4)
Differential Mode 400 800 300 800 MΩ
Common Mode 6 6 GΩ
Input Voltage Range 3.5 3.8 3.5 3.8 V
0 –0.3 0 –0.3 V
CMRR Common Mode Rejection Ratio V
CM
= 0V to 3.5V 95 110 92 108 dB
PSRR Power Supply Rejection Ratio V
S
= 2.3V to 12V 100 114 98 114 dB
ELECTRICAL CHARACTERISTICS
ORDER PART
NUMBER
LT2078ACS8
LT2078AIS8
LT2078CS8
LT2078IS8
2078A
2078AI
2078
2078I
PART MARKING
PACKAGE/ORDER INFORMATION
W
UU
ORDER PART
NUMBER
LT2079ACS
LT2079AIS
LT2079CS
LT2079IS
1
2
3
4
8
7
6
5
TOP VIEW
V
+
OUT B
–IN B
+IN B
OUT A
–IN A
+IN A
V
–
S8 PACKAGE
8-LEAD PLASTIC SO
A
B
TOP VIEW
S PACKAGE
14-LEAD PLASTIC SO
1
2
3
4
5
6
7
14
13
12
11
10
9
8
OUT A
–IN A
+IN A
V
+
+IN B
–IN B
OUT B
OUT D
–IN D
+IN D
V
–
+IN C
–IN C
OUT C
A
D
B
C
(Note 1)