6.5 Electrical Characteristics

at TA = 25°C, VS = 5 V (±2.5 V) to 10 V (±5 V), RL = 2 kΩ connected to VS / 2, VCM = VREFA = VREFGND = VS / 2, II1 = 1 µA,

and II2 = 1 µA (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

LOG CONFORMITY ERROR

Logarithmic conformity

error (1)

II1 = 10 nA to 100 µA

TBD

0.017

dB

TBD

±0.2

%

TA = 0°C to 85°C

TBD

0.026

dB

TBD

±0.3

%

II1 = 10 nA to 1 mA

0.017

0.044

dB

0.2

±0.5

%

TA = 0°C to 85°C

TBD

0.087

dB

TBD

±1

%

II1 = 1 nA to 10 mA

0.028

0.065

dB

0.32

±0.75

%

TA = 0°C to 85°C

TBD

0.131

dB

TBD

±1.5

%

TA = –40°C to +125°C

TBD

0.265

dB

TBD

±3

%

TRANSFER FUNCTION (GAIN)

Initial scaling factor (2)

II1 = 100 pA to 10 mA

252

mV/decade

Scaling factor error

II1 = 1 nA to 100 µA

–0.7

0.7

%

TA = 0°C to 85°C

–0.9

0.9

II1 = 100 pA to 10 mA

–1

1

TA = 0°C to 85°C

–1.5

1.5

TA = –40°C to +125°C

–3.2

3.2

LOGARITHMIC AMPLIFIER INPUT

VOS

Offset voltage

VI1 – VCM

II1 = 1 nA

2

mV

II1 = 1 mA

50

II1 = 1 mA, TA = –40°C to

+125°C

TBD

VI2 – VCM

II2 = 1 nA

2

II2 = 1 mA

2

II1 = 1 mA, TA = –40°C to

+125°C

TBD

dVOS/dT

Offset voltage drift

VI1 – VCM

TBD

µV/°C

VI2 – VCM

TBD

VCM

Input common mode

voltage

(VS–) + 2.3

(VS+) – 2.0

V

CMRR

Common-mode rejection

ratio (2)

(VS–) + 2.3 < VCM < (VS+) – 2.0, II1 = II2 = 1 µA

60

dB

IBIAS ratio

II1 = 10 µA

1.143

A/A

II1 = 10 mA

1.175

IBIAS voltage

II1 = 10 µA and 10 mA

(VS–)

(VS+) – 1.0

V

In

Input current noise

f = 1 kHz

II1 = II2 = 1 nA

TBD

pA/√Hz

II1 = II2 = 1 µA

TBD

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LOG200

SBOSA28 – AUGUST 2023

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