LOG114

활성

2.5V 레퍼런스 및 미완료 출력 연산 증폭기를 지원하는 정밀 고속 대수 증폭기

지금 주문하기

데이터 시트

document-pdfAcrobat LOG114 Single-Supply, High-Speed, Precision Logarithmic Amplifier datasheet (Rev. C) (영어) PDF | HTML

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대안 비교

다른 핀 출력을 지원하지만 비교 대상 장치와 동일한 기능.

LOG200

활성

포토다이오드 바이어스 및 다크 전류 보정을 지원하는 고속 정밀 대수 증폭기 Upgraded performance with smaller package option

LOG114

활성

데이터 시트

지금 주문하기

제품 상세 정보

Scale factor (V/decade)

0.375

Input current range (min) (nA)

0.1

Input current range (max) (mA)

10

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

4

Vs (±) (min) (V)

4.8

Vs (±) (max) (V)

11

Iq (max) (mA)

15

Dynamic range (typ) (dB)

160

Reference type

Internal

Auxiliary op amps

2

Full-scale output voltage (min) (±V)

-4.4

Full-scale output voltage (max) (±V)

4.4

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

0.2

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

0.1

Operating temperature range (°C)

0 to 70

Specified voltage (±V)

5

Rating

Catalog

Scale factor (V/decade)

0.375

Input current range (min) (nA)

0.1

Input current range (max) (mA)

10

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

4

Vs (±) (min) (V)

4.8

Vs (±) (max) (V)

11

Iq (max) (mA)

15

Dynamic range (typ) (dB)

160

Reference type

Internal

Auxiliary op amps

2

Full-scale output voltage (min) (±V)

-4.4

Full-scale output voltage (max) (±V)

4.4

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

0.2

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

0.1

Operating temperature range (°C)

0 to 70

Specified voltage (±V)

5

Rating

Catalog

VQFN (RGV)

16

16 mm² (4 mm × 4 mm)

Advantages:
- Tiny for high density systems
- Precision on one supply
- Fast over eight decades
- Fully-tested function
Two scaling amplifiers
Wide input dynamic range: eight decades, 100pA to 10mA
2.5V reference
Stable over temperature
Low quiescent current: 10mA
Dual or single supply: ±5V, 5V
Package: Small QFN-16 (4mm × 4mm)
Specified temperature range: −5°C to 75°C

Advantages:
- Tiny for high density systems
- Precision on one supply
- Fast over eight decades
- Fully-tested function
Two scaling amplifiers
Wide input dynamic range: eight decades, 100pA to 10mA
2.5V reference
Stable over temperature
Low quiescent current: 10mA
Dual or single supply: ±5V, 5V
Package: Small QFN-16 (4mm × 4mm)
Specified temperature range: −5°C to 75°C

The LOG114 is specifically designed for measuring low-level and wide dynamic range currents in communications, lasers, medical, and industrial systems. The device computes the logarithm or log-ratio of an input current or voltage relative to a reference current or voltage (logarithmic transimpedance amplifier).

High precision is verified over a wide dynamic range of input signals on either bipolar (±5V) or single (5V) supply. Special temperature drift compensation circuitry is included on-chip. In log-ratio applications, the signal current can be from a high impedance source such as a photodiode or resistor in series with a low impedance voltage source. The reference current is provided by a resistor in series with a precision internal voltage reference, photo diode, or active current source.

The output signal at VLOGOUT has a scale factor of 0.375V/decade of input current, which limits the output so that the output fits within a 5V or 10V range. The output can be scaled and offset with one of the available additional amplifiers, so the output matches a wide variety of ADC input ranges. Stable DC performance allows accurate measurement of low-level signals over a wide temperature range. The LOG114 is specified over a −5°C to 75°C temperature range and can operate from −40°C to 85°C.

The LOG114 is specifically designed for measuring low-level and wide dynamic range currents in communications, lasers, medical, and industrial systems. The device computes the logarithm or log-ratio of an input current or voltage relative to a reference current or voltage (logarithmic transimpedance amplifier).

High precision is verified over a wide dynamic range of input signals on either bipolar (±5V) or single (5V) supply. Special temperature drift compensation circuitry is included on-chip. In log-ratio applications, the signal current can be from a high impedance source such as a photodiode or resistor in series with a low impedance voltage source. The reference current is provided by a resistor in series with a precision internal voltage reference, photo diode, or active current source.

The output signal at VLOGOUT has a scale factor of 0.375V/decade of input current, which limits the output so that the output fits within a 5V or 10V range. The output can be scaled and offset with one of the available additional amplifiers, so the output matches a wide variety of ADC input ranges. Stable DC performance allows accurate measurement of low-level signals over a wide temperature range. The LOG114 is specified over a −5°C to 75°C temperature range and can operate from −40°C to 85°C.

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상위 문서	유형	직함	형식 옵션	최신 영어 버전 다운로드	날짜
*	데이터 시트	LOG114 Single-Supply, High-Speed, Precision Logarithmic Amplifier datasheet (Rev. C)	PDF \| HTML		2025. 12. 10

설계 및 개발

추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.

평가 보드

LOG114EVM — LOG114 평가 모듈

LOG114EVM은 다양한 구성에서 LOG114의 성능을 평가할 수 있는 즉시 사용 가능한 플랫폼입니다. LOG114EVM은 단일 5V 전원 공급 장치에서 작동하도록 구성되어 있습니다. LOG114EVM에 사용되는 회로는 광범위한 입력 전류(10nA~10mA)에서 작동하도록 설계되었으며 출력 전압을 1.15V~2.75V로 확장할 수 있습니다. 추가 회로에는 정밀 레벨 시프터 및 고전류 선형성 보정 섹션이 포함되어 있습니다.

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