LOG114
- 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
- STABILE OVER TEMPERATURE
- LOW QUIESCENT CURRENT: 10mA
- DUAL OR SINGLE SUPPLY: ±5V, +5V
- PACKAGE: Small QFN-16 (4mm x 4mm)
- SPECIFIED TEMPERATURE RANGE: –5°C to +75°C
- APPLICATIONS
- ONET ERBIUM-DOPED FIBER OPTIC AMPLIFIER (EDFA)
- LASER OPTICAL DENSITY MEASUREMENT
- PHOTODIODE SIGNAL COMPRESSION AMP
- LOG, LOG-RATIO FUNCTION
- ANALOG SIGNAL COMPRESSION IN FRONT OF ANALOG-TO-DIGITAL (ADC) CONVERTER
- ABSORBANCE MEASUREMENT
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 ensured 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 may 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 out per decade of input current, which limits the output so that it fits within a 5V or 10V range. The output can be scaled and offset with one of the available additional amplifiers, so it 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.
기술 자료
유형 | 직함 | 날짜 | ||
---|---|---|---|---|
* | Data sheet | Single-Supply, High-Speed, Precision Logarithmic Amplifier datasheet (Rev. A) | 2007/03/19 | |
EVM User's guide | LOG114EVM User Guide | 2011/09/29 |
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패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
---|---|---|
VQFN (RGV) | 16 | Ultra Librarian |
주문 및 품질
- RoHS
- REACH
- 디바이스 마킹
- 납 마감/볼 재질
- MSL 등급/피크 리플로우
- MTBF/FIT 예측
- 물질 성분
- 인증 요약
- 지속적인 신뢰성 모니터링
- 팹 위치
- 조립 위치