LOG112

AKTIV

Präziser logarithmischer und Log-Ratio-Verstärker mit integrierter Referenzspannung für 2,5 V;

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Datenblatt

document-pdfAcrobat Precision Logarithmic and Log Ratio Amplifier datasheet (Rev. D) (Englisch)

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LOG112

AKTIV

Datenblatt

Jetzt bestellen

Produktdetails

Scale factor (V/decade)

0.5

Input current range (min) (nA)

Input current range (max) (mA)

3.5

Offset voltage (input amplifiers) (max) (mV)

1.5

Vs (±) (min) (V)

4.5

Vs (±) (max) (V)

Iq (max) (mA)

1.75

Dynamic range (typ) (dB)

150

Reference type

Internal

Auxiliary op amps

Full-scale output voltage (min) (±V)

-3.8

Full-scale output voltage (max) (±V)

3.5

Conformity error (initial 5 decades) (max) (%)

0.2

Conformity error (initial 5 decades) (typ. over temp) (%/°C)

0.0001

Operating temperature range (°C)

-40 to 85

Specified voltage (±V)

Rating

Catalog

Scale factor (V/decade)

0.5

Input current range (min) (nA)

Input current range (max) (mA)

3.5

Offset voltage (input amplifiers) (max) (mV)

1.5

Vs (±) (min) (V)

4.5

Vs (±) (max) (V)

Iq (max) (mA)

1.75

Dynamic range (typ) (dB)

150

Reference type

Internal

Auxiliary op amps

Full-scale output voltage (min) (±V)

-3.8

Full-scale output voltage (max) (±V)

3.5

Conformity error (initial 5 decades) (max) (%)

0.2

Conformity error (initial 5 decades) (typ. over temp) (%/°C)

0.0001

Operating temperature range (°C)

-40 to 85

Specified voltage (±V)

Rating

Catalog

SOIC (D)

51.9 mm² 8.65 x 6

EASY-TO-USE COMPLETE FUNCTION
OUTPUT SCALING AMPLIFIER
ON-CHIP 2.5V VOLTAGE REFERENCE
HIGH ACCURACY: 0.2% FSO Over 5 Decades
WIDE INPUT DYNAMIC RANGE:
7.5 Decades, 100pA to 3.5mA
LOW QUIESCENT CURRENT: 1.75mA
WIDE SUPPLY RANGE: ±4.5V to ±18V
PACKAGES: SO-14 (narrow) and SO-16
APPLICATIONS
- LOG, LOG RATIO:
  Communication, Analytical, Medical, Industrial, Test, General Instrumentation
- PHOTODIODE SIGNAL COMPRESSION AMP
- ANALOG SIGNAL COMPRESSION IN FRONT OF ANALOG-TO-DIGITAL (A/D) CONVERTER
- ABSORBANCE MEASUREMENT
- OPTICAL DENSITY MEASUREMENT

All trademarks are the property of their respective owners.

EASY-TO-USE COMPLETE FUNCTION
OUTPUT SCALING AMPLIFIER
ON-CHIP 2.5V VOLTAGE REFERENCE
HIGH ACCURACY: 0.2% FSO Over 5 Decades
WIDE INPUT DYNAMIC RANGE:
7.5 Decades, 100pA to 3.5mA
LOW QUIESCENT CURRENT: 1.75mA
WIDE SUPPLY RANGE: ±4.5V to ±18V
PACKAGES: SO-14 (narrow) and SO-16
APPLICATIONS
- LOG, LOG RATIO:
  Communication, Analytical, Medical, Industrial, Test, General Instrumentation
- PHOTODIODE SIGNAL COMPRESSION AMP
- ANALOG SIGNAL COMPRESSION IN FRONT OF ANALOG-TO-DIGITAL (A/D) CONVERTER
- ABSORBANCE MEASUREMENT
- OPTICAL DENSITY MEASUREMENT

All trademarks are the property of their respective owners.

The LOG112 and LOG2112 are versatile integrated circuits that compute the logarithm or log ratio of an input current relative to a reference current. V_LOGOUT of the LOG112 and LOG2112 are trimmed to 0.5V per decade of input current, ensuring high precision over a wide dynamic range of input signals.

The LOG112 and LOG2112 features a 2.5V voltage reference that may be used to generate a precision current reference using an external resistor.

Low DC offset voltage and temperature drift allow accurate measurement of low-level signals over the specified temperature range of –5°C to +75°C.

The LOG112 and LOG2112 features a 2.5V voltage reference that may be used to generate a precision current reference using an external resistor.

Low DC offset voltage and temperature drift allow accurate measurement of low-level signals over the specified temperature range of –5°C to +75°C.

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	Typ	Titel		Datum
*	Data sheet	Precision Logarithmic and Log Ratio Amplifier datasheet (Rev. D)		04 Apr 2005

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