Datasheet

REV. B
–7–
OP90
+18V
–18V
2
3
4
6
7
OP90
Figure 2. Burn-In Circuit
APPLICATION INFORMATION
Battery-Powered Applications
The OP90 can be operated on a minimum supply voltage of 1.6 V,
or with dual supplies ±0.8 V, and draws only 14 pA of supply
current. In many battery-powered circuits, the OP90 can be
continuously operated for thousands of hours before requiring
battery replacement, reducing equipment down time and
operating cost.
High-performance portable equipment and instruments frequently
use lithium cells because of their long shelf-life, light weight, and
high-energy density relative to older primary cells. Most lithium
cells have a nominal output voltage of 3 V and are noted for a
flat discharge characteristic. The low-supply voltage requirement
of the OP90, combined with the flat discharge characteristic of
the lithium cell, indicates that the OP90 can be operated over
the entire useful life of the cell. Figure 1 shows the typical dis-
charge characteristic of a 1Ah lithium cell powering an OP90
which, in turn, is driving full output swing into a 100 kΩ load.
FREQUENCY – Hz
POWER SUPPLY REJECTION – dB
120
100
20
11k
10 100
T
A
= 25ⴗC
60
80
40
POSITIVE SUPPLY
NEGATIVE SUPPLY
TPC 10. Power Supply Rejection
vs. Frequency
FREQUENCY – Hz
CURRENT NOISE DENSITY – pA/ 兹Hz
100
0.1
0.1 1k
110
10
1
V
S
= ⴞ15V
T
A
= 25ⴗC
100
TPC 13. Current Noise Density
vs. Frequency
FREQUENCY – Hz
COMMON-MODE REJECTION – dB
140
120
40
11k
10 100
V
S
= ⴞ15V
T
A
= 25ⴗC
80
100
60
TPC 11. Common-Mode Rejection
vs. Frequency
T
A
= 25ⴗC
V
S
= ⴞ15V
A
V
= +1
R
L
= 10k⍀
C
L
= 500pF
TPC 14. Small-Signal Transient
Response
FREQUENCY – Hz
NOISE VOLTAGE DENSITY – nV/
兹Hz
1000
1
0.1 1k
110
100
10
V
S
= ⴞ15V
T
A
= 25ⴗC
100
TPC 12. Noise Voltage Density
vs. Frequency
T
A
= 25ⴗC
V
S
= ⴞ15V
A
V
= +1
R
L
= 10k⍀
C
L
= 500pF
TPC 15. Large-Signal Transient
Response