Datasheet

LOG112, 2112
6
SBOS246D
www.ti.com
TYPICAL CHARACTERISTICS (Cont.)
At T
A
= +25°C, V
S
= ±5V, and R
L
= 10kΩ, unless otherwise noted.
MINIMUM VALUE OF COMPENSATION CAPACITOR
100M
10M
1M
100k
10k
1k
100
10
1
C
C
(pF)
100pA 1nA 10nA 100nA 1µA10µA 100µA 1mA 10mA
I
2
I
1
= 100pA
I
1
= 1nA
I
1
= 10nA
I
1
= 100nA
1µA
I
1
= 10µA
100µA
1mA
Select C
C
for I
1
min.
and I
2
max. Values
below 2pF may be ignored.
3dB FREQUENCY RESPONSE
3dB Frequency Response (Hz)
0.1
1M
100k
10k
1k
100
10
1
100µA
100µA
1mA
I
1
= 1mA
1µA
1mA
to 10µA
100nA
10nA
I
1
= 1nA
10nA
C
C
= 1000pF
C
C
= 1
µF
10µA to 1
µA
C
C
= 10pF
1nA
100µA
100pA 1nA 10nA 100nA 1µA10µA 100µA 1mA
I
2
1µA
10µA
100µA
I
1
= 1nA
10nA
17
15
13
11
9
7
5
3
1
–1
Input Current (I
1
or I
2
)
Log Conformity (mV)
LOG CONFORMITY vs INPUT CURRENT
+85°C
+75°C
–40°C to +25°C
100pA 1nA 10nA 100nA 1µA10µA 100µA1mA
LOG CONFORMITY vs TEMPERATURE
Log Conformity (m%)
700
600
500
400
300
200
100
0
–40 –20 0 20 40 60 80
Temperature (°C)
7.5 Decade
7 Decade
6 Decade
5 Decade