LOG112, 2112

4

SBOS246D

www.ti.com

BW, 3dB

0.1

kH

38

kH

40

kH

45

kHz

Step Response

Increasing

1.1

ms

1.6

µs

1.5

µs

Decreasing

2.1

ms

31.2

µs

µs

Increasing

2.6

ms

113

µs

1.2

ms

Decreasing

630

µs

6.6

µs

13.3

µs

OP AMP, A3

Input Offset Voltage

+250

±1000

µV

vs Temperature

vs Supply

=

±4.5V to ±18V

5

50

µV/V

Input Bias Current

–10

nA

Input Offset Current

±0.5

nA

Input Voltage Range

(V–)

(V+) – 1.5

V

Input Noise, f = 0.1Hz to 10Hz

1

µV

PP

f = 1kHz

28

Open-Loop Voltage Gain

88

dB

Gain-Bandwidth Product

1.4

MHz

Slew Rate

0.5

V/

µs

Settling Time, 0.01%

16

µs

Rated Output

(V–) + 1.5

(V+) – 0.9

V

Short-Circuit Current

±4mA

VOLTAGE REFERENCE

Bandgap Voltage

2.5

V

Error, Initial

±0.05

±0.5

%

vs Temperature

±25

ppm/

°C

vs Supply

±10

ppm/V

vs Load

±600

ppm/mA

Short-Circuit Current

16

mA

POWER SUPPLY

Operating Range

±4.5

±18

V

Quiescent Current

LOG112

±1.25

±1.75

mA

LOG2112

±2.5

±3.5

mA

TEMPERATURE RANGE

–575

°C

Operating Range

–40

85

°C

Storage Range

–55

125

°C

Thermal Resistance,

θ

110

°C/W

SO-16

80

°C/W

output. K, scale factor, equals 0.5V output per decade of input current. (2) Scale factor of core log function is trimmed to 0.5V output per decade change of input

voltage, bias current, gain, and log conformity. (5) Bandwidth (3dB) and transient response are a function of both the compensation capacitor and the level of input

current.

LOG112, LOG2112

PARAMETER

CONDITION

MIN

TYP

MAX

UNITS