LOG101 Datasheet, PDF (3/13 Pages) Burr-Brown (TI) – Precision LOGARITHMIC AND LOG RATIO AMPLIFIER

ELECTRICAL CHARACTERISTICS (Cont.)
Boldface limits apply over the specified temperature range, T_A = –5°C to +75°C.
At T_A = +25°C, V_S = ±5V, and R_L = 10kΩ, unless otherwise noted.
PARAMETER
CONDITION
LOG101AID
MIN
TYP
MAX
UNITS
TOTAL ERROR⁽⁴⁾⁽⁵⁾
Initial
vs Temperature
vs Supply
FREQUENCY RESPONSE, CORE LOG⁽⁶⁾
BW, 3dB
I₂ = 10nA
I₂ = 1µA
I₂ = 10µA
I₂ = 1mA
Step Response
Increasing
I₂ = 1µA to 1mA
I₂ = 100nA to 1µA
I₂ = 10nA to 100nA
Decreasing
I₂ = 1mA to 1µA
I₂ = 1µA to 100nA
I₂ = 100nA to 10nA
POWER SUPPLY
Operating Range
Quiescent Current
TEMPERATURE RANGE
Specified Range, T_MIN to T_MAX
Operating Range
Storage Range
Thermal Resistance, θ_JA SO-8
I₁ or I₂ remains fixed while other varies.
Min to Max
I₁ or I₂ = 3.5mA
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 = 350pA
I₁ or I₂ = 100pA
I₁ or I₂ = 3.5mA
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 = 350pA
I₁ or I₂ = 100pA
I₁ or I₂ = 3.5mA
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 = 350pA
I₁ or I₂ = 100pA
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
V_S
I_O = 0
±4.5
–5
–40
–55
±1.2
±0.4
±0.1
±0.05
±0.05
±0.09
±0.2
±0.3
±0.1
±0.3
±3.0
±0.1
±0.1
±0.1
±0.1
±0.1
±0.1
±0.25
±0.1
±0.1
0.1
38
40
45
11
7
110
45
20
550
±1
150
±75
±20
±20
±20
±20
±20
±20
±20
±20
±20
±18
±1.5
75
85
125
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV/ °C
mV/ °C
mV/ °C
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
mV/V
mV/ V
mV/ V
kHz
kHz
kHz
kHz
µs
µs
µs
µs
µs
µs
V
mA
°C
°C
°C
°C/W
NOTES: (1) Log Conformity Error is peak deviation from the best-fit straight line of V_OUT versus log (I₁/ I₂) curve expressed as a percent of peak-to-peak full-scale.
(2) May require higher supply for full dynamic range.
(3) Output core log function is trimmed to 1V output per decade change of input current.
(4) Worst-case Total Error for any ratio of I₁/I₂ is the largest of the two errors, when I₁ and I₂ are considered separately.
(5) Total I₁ + I₂ should be kept below 4.5mA on ±5V supply.
(6) Bandwidth (3dB) and transient response are a function of both the compensation capacitor and the level of input current.
LOG101
SBOS242B
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