LOG102 Datasheet, PDF (3/15 Pages) Texas Instruments – LOGARITHMIC AND LOG RATIO AMPLIFIER

ELECTRICAL CHARACTERISTICS (Cont.)
Boldface limits apply over the specified temperature range, T_A = 0°C to +70°C.
At T_A = +25°C, V_S = ±5V, R_L = 10kΩ, unless otherwise noted.
PARAMETER
CONDITION
LOG102AID
MIN
TYP
MAX
UNITS
TOTAL ERROR⁽³⁾⁽⁴⁾
Initial
vs Temperature
vs Supply
FREQUENCY RESPONSE, core log ⁽⁵⁾
BW, 3dB
I₂ = 10nA
I₂ = 1µA
I₂ = 10µA
I₂ = 1mA
Step Response
Increasing
I₂ = 1µA to 1mA (3 decade)
I₂ = 100nA to 1µA (1 decade)
I₂ = 10nA to 100nA (1 decade)
Decreasing
I₂ = 1mA to 1µA (3 decade)
I₂ = 1µA to 100nA (1 decade)
I₂ = 100nA to 10nA (1 decade)
OP AMPS, A3 AND A4
Input Offset Voltage
vs Temperature
vs Power Supply
Input Bias Current⁽⁵⁾
Input Offset Current
Input Voltage Range
Common-Mode Rejection
Input Noise, f = 0.1Hz to 10Hz
f = 1kHz
Open Loop Voltage Gain
Gain-Bandwidth Product
Slew Rate
Settling Time, 0.01%
Rated Output
Short-Circuit Current
–I_SC / +I_SC
POWER SUPPLY
Operating Range
Quiescent Current
TEMPERATURE RANGE
Specified Range, T_MIN to T_MAX
Operating Range
Storage Range
Thermal Resistance, θ_JA
SO-14
I₁ or I₂ remains fixed while other varies
min to max
I₁ or I₂ = 1mA
I₁ or I₂ = 100µA
I₁ or I₂ = 10µA
I₁ or I₂ = 1µA
I₁ or I₂ = 100nA
I₁ or I₂ = 10nA
I₁ or I₂ = 1nA
I₁ or I₂ = 1mA
I₁ or I₂ = 100µA
I₁ or I₂ = 10µA
I₁ or I₂ = 1µA
I₁ or I₂ = 100nA
I₁ or I₂ = 10nA
I₁ or I₂ = 1nA
I₁ or I₂ = 1mA
I₁ or I₂ = 100µA
I₁ or I₂ = 10µA
I₁ or I₂ = 1µA
I₁ or I₂ = 100nA
I₁ or I₂ = 10nA
I₁ or I₂ = 1nA
C_C = 4500pF
C_C = 150pF
C_C = 150pF
C_C = 50pF
C_C = 150pF
C_C = 150pF
C_C = 150pF
C_C = 150pF
C_C = 150pF
C_C = 150pF
T_MIN to T_MAX
V_S = ±4.5V to ±18V
G = 1, 2.5V step
G = 1, 2.5V Step, C_L =100pF
V_S = 5V, R_L = 10kΩ
V_S
I_O = 0
(V–)
(V–) + 1.5
±4.5
0
–40
–40
±0.4
±0.07
±0.07
±0.07
±0.07
±0.07
±0.4
±0.15
±0.15
±0.25
±0.2
±0.2
±0.15
±0.25
0.1
38
40
45
11
7
110
45
20
550
±175
±2
10
–10
±0.5
86
1
28
88
1.4
0.5
16
–36 /+60
1.25
100
±55
±30
±25
±20
±25
±30
±37
±750
50
(V+) – 1.5
(V+) – 0.9
±18
2
70
+85
+125
mV
mV
mV
mV
mV
mV
mV
mV/ °C
mV/ °C
mV/ °C
mV/ °C
mV/ °C
mV/ °C
mV/ °C
mV/ V
mV/ V
mV/ V
mV/ V
mV/ V
mV/ V
mV/ V
kHz
kHz
kHz
kHz
µs
µs
µs
µs
µs
µs
µV
µV/ °C
µV/V
nA
nA
V
dB
µVp-p
nV/√Hz
dB
MHz
V/µs
µs
V
mA
V
mA
°C
°C
°C
°C/W
NOTES: (1) Log Conformity Error is peak deviation from the best-fit straight line of V_O versus Log (I₁/I₂) curve expressed as a percent of peak-to-peak full-scale
(2) Output core log function is trimmed to 1V output per decade change of input current. (3) Worst-case Total Error for any ratio of I₁/I₂, is the largest of the two
errors, when I₁ and I₂ are considered separately. (4) Total I₁ + I₂ should be kept below 1.1mA on ±5V supply. (5) Bandwidth (3dB) and transient response are a
function of both the compensation capacitor and the level of input current. (6) Positive conventional current flows into input terminals.
LOG102
SBOS211A
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