LOG114 Datasheet, PDF (8/30 Pages) Burr-Brown (TI) – Single-Supply, High-Speed, Precision LOGARITHMIC AMPLIFIER

LOG114
SBOS301A − MAY 2004 − REVISED MARCH 2007
TYPICAL CHARACTERISTICS: V_S = +5V (continued)
All specifications at T_A = +25°C, R_VLOGOUT = 10kΩ, V_CM = GND, unless otherwise noted.
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AVERAGE TOTAL ERROR AT +80_C
100
80
60
I₁ = 1mA
40
20
0
I₁ = 10µA _{I1 = 100µA}
−20
−40
−60
−80 ^{I1 = 10nA}
−100
I₁ = 1nA
100µA 200µA
I₁ = 100nA
I₁ = 1µA
400µA 600µA 800µA
I₂
1mA
100
80
60
40
20
0
−20
−40
−60
−80
−100
100µA
AVERAGE TOTAL ERROR AT +25_C
I₁ = 1mA
I₁ = 100µA _{I1 = 10µA}
200µA
I₁ = 1µA
I₁ = 1nA, 10nA,
100nA
400µA 600µA
I₂
800µA
1mA
AVERAGE TOTAL ERROR AT −10_C
100
80
60
I₁ = 1mA
40
20
I₁ = 1nA
0
−20
−40
−60
I₁ = 10nA _{I1 = 100µA}
I₁ = 10µA
I₁ = 100nA
−80
I₁ = 1µA
−100
100µA
200µA
400µA
600µA
800µA
1mA
I₂
LOG CONFORMITY vs TEMPERATURE
1.4
7.5 Decade
1.2
1.0
0.8
0.6
6 Decade
0.4
7 Decade
5 Decade
4 Decade
0.2
0
−10 0
10 20 30 40 50 60 70 80 90
Temperature (_ C)
0.09
4 DECADE LOG CONFORMITY vs I_REF
0.08
+90_ C
0.07
0.06
+80_ C
0_C
−10_ C
0.05
0.04
100pA 1nA
+25_C
+70_ C
10nA 100nA 1µA 10µA 100µA 1mA 10mA
I_REF (I₁)
0.40
5 DECADE LOG CONFORMITY vs I_REF
0.35
+90_ C
0.30
0.25
0.20
+80_ C
0.15
+70_ C
0.10
0.05
−10_C, 0_ C, +25_C
0
100pA 1nA 10nA 100nA 1µA
10µA 100µA 1mA
10mA
I_REF (I₁)
8