Datasheet

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LOG102
3
SBOS211B
TOTAL ERROR
(3)(4)
I
1
or I
2
remains fixed while other varies
Initial min to max
I
1
or I
2
= 1mA ±55 mV
I
1
or I
2
= 100µA ±30 mV
I
1
or I
2
= 10µA ±25 mV
I
1
or I
2
= 1µA ±20 mV
I
1
or I
2
= 100nA ±25 mV
I
1
or I
2
= 10nA ±30 mV
I
1
or I
2
= 1nA ±37 mV
vs Temperature I
1
or I
2
= 1mA ±0.4 mV/°C
I
1
or I
2
= 100µA ±0.07 mV/°C
I
1
or I
2
= 10µA ±0.07 mV/°C
I
1
or I
2
= 1µA ±0.07 mV/°C
I
1
or I
2
= 100nA ±0.07 mV/°C
I
1
or I
2
= 10nA ±0.07 mV/°C
I
1
or I
2
= 1nA ±0.4 mV/°C
vs Supply I
1
or I
2
= 1mA ±0.15 mV/V
I
1
or I
2
= 100µA ±0.15 mV/V
I
1
or I
2
= 10µA ±0.25 mV/V
I
1
or I
2
= 1µA ±0.2 mV/V
I
1
or I
2
= 100nA ±0.2 mV/V
I
1
or I
2
= 10nA ±0.15 mV/ V
I
1
or I
2
= 1nA ±0.25 mV/V
FREQUENCY RESPONSE, core log
(5)
BW, 3dB
I
2
= 10nA C
C
= 4500pF 0.1 kHz
I
2
= 1µAC
C
= 150pF 38 kHz
I
2
= 10µAC
C
= 150pF 40 kHz
I
2
= 1mA C
C
= 50pF 45 kHz
Step Response
Increasing
I
2
= 1µA to 1mA (3 decade) C
C
= 150pF 11 µs
I
2
= 100nA to 1µA (1 decade) C
C
= 150pF 7 µs
I
2
= 10nA to 100nA (1 decade) C
C
= 150pF 110 µs
Decreasing
I
2
= 1mA to 1µA (3 decade) C
C
= 150pF 45 µs
I
2
= 1µA to 100nA (1 decade) C
C
= 150pF 20 µs
I
2
= 100nA to 10nA (1 decade) C
C
= 150pF 550 µs
OP AMPS, A3 AND A4
Input Offset Voltage ±175 ±750 µV
vs Temperature T
MIN
to T
MAX
±2 µV/°C
vs Power Supply V
S
= ±4.5V to ±18V 10 50 µV/V
Input Bias Current
(5)
–10 nA
Input Offset Current ±0.5 nA
Input Voltage Range (V–) (V+) – 1.5 V
Common-Mode Rejection 86 dB
Input Noise, f = 0.1Hz to 10Hz 1 µV
PP
f = 1kHz 28 nV/√Hz
Open Loop Voltage Gain 88 dB
Gain-Bandwidth Product 1.4 MHz
Slew Rate G = 1, 2.5V step 0.5 V/µs
Settling Time, 0.01% G = 1, 2.5V Step, C
L
=100pF 16 µs
Rated Output V
S
= 5V, R
L
= 10kΩ (V–) + 1.5 (V+) – 0.9 V
Short-Circuit Current –I
SC
/+I
SC
–36/+60 mA
POWER SUPPLY
Operating Range V
S
±4.5 ±18 V
Quiescent Current I
O
= 0 1.25 2 mA
TEMPERATURE RANGE
Specified Range, T
MIN
to T
MAX
070°C
Operating Range –40 +85 °C
Storage Range –40 +125 °C
Thermal Resistance,
θ
JA
SO-14 100 °C/W
NOTES: (1) Log Conformity Error is peak deviation from the best-fit straight line of V
O
versus Log (I
1
/I
2
) 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 I
1
/I
2
, is the largest of the two
errors, when I
1
and I
2
are considered separately. (4) Total I
1
+ I
2
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.
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.
LOG102AID
PARAMETER CONDITION MIN TYP MAX UNITS