5.5 Electrical Characteristics

at TA = 25°C, VS = 5V (±2.5V) to 10V (±5V), OUTA RL = 10kΩ connected to VS / 2, OUTB RL = 2kΩ connected to VS / 2,

VCM = VREFA = VS / 2, VREFGND = VS–, II1 = 1µA, and II2 = 1µA (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

LOG CONFORMITY ERROR

Logarithmic conformity

error

II1 = 10nA to 100µA

0.004

0.017

dB

0.05

±0.2

%

TA = 0°C to 85°C

0.004

0.026

dB

0.05

±0.3

%

II1 = 10nA to 1mA

0.007

0.044

dB

0.08

±0.5

%

TA = 0°C to 85°C

0.007

0.087

dB

0.08

±1

%

II1 = 1nA to 10mA

0.022

0.065

dB

0.25

±0.75

%

TA = 0°C to 85°C

0.022

0.131

dB

0.25

±1.5

%

TA = –40°C to +125°C,

VS = 5V (1)

0.030

0.265

dB

0.35

±3

%

TA = –40°C to +125°C,

VS = 10V (1)

0.044

0.265

dB

0.5

±3

%

TRANSFER FUNCTION (GAIN)

Initial scaling factor

II1 = 100pA to 10mA

250

mV/decade

Scaling factor error

II1 = 1nA to 100µA

–1

0.15

1

%

TA = 0°C to 85°C

–1.1

1.1

II1 = 100pA to 10mA

0.4

TA = 0°C to 85°C, VS = 5V

0.5

TA = 0°C to 85°C, VS = 10V

0.7

TA = –40°C to +125°C,

VS = 5V (1)

3.8

TA = –40°C to +125°C,

VS = 10V (1)

6.3

LOGARITHMIC AMPLIFIER INPUT

VOS

Offset voltage

VI1 – VCM

II1 = 10nA, VS = 5V

–3

–0.84

3

mV

II1 = 10nA, VS = 10V

–4

–1.6

2

II1 = 100µA

32

50

II1 = 100µA,

TA = –40°C to +125°C

42

VI2 – VCM

II2 = 10nA, VS = 5V

–3

–0.89

3

II2 = 10nA, VS = 10V

–4

–1.4

2

II2 = 100µA, VS = 5V

–0.66

3

II2 = 100µA, VS = 10V

–1.2

2

II2 = 100µA,

TA = –40°C to +125°C

–1.5

dVOS/dT Offset voltage drift

VI1 – VCM

22

µV/°C

VI2 – VCM

–7

VCM

Input common mode

voltage

(VS–) + 2.3

(VS+) – 2.0

V

IBIAS ratio

VIBIAS = (VS+) – 1.0V,

VS = 5V

II1 = 100µA

1.069

1.127

1.185

A/A

II1 = 10mA

1.094

1.128

1.161

VIBIAS = (VS+) – 1.0V,

VS = 10V

II1 = 100µA

1.069

1.127

1.184

II1 = 10mA

1.128

1.162

1.195

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LOG200

SBOSA28A – AUGUST 2023 – REVISED DECEMBER 2024

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