LOG114 具有 2.5V 参考和非约束输出运算放大器的精密高速对数放大器
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
|
LOG114 |
| Scale Factor (V/decade) |
0.375 |
| Input Current Range (Min) (nA) |
0.1 |
| Input Current Range (Max) (mA) |
10 |
| Conformity Error (initial 5 decades) (Max) (%) |
0.2 |
| Conformity Error (initial 5 decades) (typ. over temp) (%/degree C) |
0.1 |
| Offset Voltage (Input Amplifiers) (Max) (mV) |
4 |
| Vs (+/-) (Min) (V) |
4.8 |
| Vs (+/-) (Max) (V) |
11 |
| Iq (Max) (mA) |
15 |
| Reference Type |
Internal |
| Auxiliary Op Amps |
2 |
| Operating Temperature Range (C) |
0 to 70 |
| Pin/Package |
16VQFN |
| Rating |
Catalog |
LOG114 特性
- 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
LOG114 芯片订购指南
| 器件 |
状态 |
温度 |
价格 |
封装 | 引脚 |
封装数量 | 封装载体 |
丝印标记 |
| LOG114AIRGVR |
ACTIVE |
0 to 70 |
4.50 | 1ku |
VQFN (RGV) | 16 |
2500 | LARGE T&R |
|
| LOG114AIRGVRG4 |
ACTIVE |
0 to 70 |
4.50 | 1ku |
VQFN (RGV) | 16 |
2500 | LARGE T&R |
|
| LOG114AIRGVT |
ACTIVE |
0 to 70 |
5.20 | 1ku |
VQFN (RGV) | 16 |
250 | SMALL T&R |
|
| LOG114AIRGVTG4 |
ACTIVE |
0 to 70 |
5.20 | 1ku |
VQFN (RGV) | 16 |
250 | SMALL T&R |
|
LOG114 质量与无铅数据
| 器件 |
环保计划* |
铅/焊球涂层 |
MSL 等级/回流焊峰 |
环保信息与无铅 (Pb-free) |
DPPM / MTBF / FIT 率 |
| LOG114AIRGVR |
Green (RoHS & no Sb/Br) |
CU NIPDAUAG |
Level-2-260C-1 YEAR |
LOG114AIRGVR |
LOG114AIRGVR |
| LOG114AIRGVRG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAUAG |
Level-2-260C-1 YEAR |
LOG114AIRGVRG4 |
LOG114AIRGVRG4 |
| LOG114AIRGVT |
Green (RoHS & no Sb/Br) |
CU NIPDAUAG |
Level-2-260C-1 YEAR |
LOG114AIRGVT |
LOG114AIRGVT |
| LOG114AIRGVTG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAUAG |
Level-2-260C-1 YEAR |
LOG114AIRGVTG4 |
LOG114AIRGVTG4 |
LOG114 应用技术支持与电子电路设计开发资源下载
- LOG114 数据资料 dataSheet 下载.PDF
- TI 德州仪器特殊功能放大器产品选型与价格 . xls
- 所选封装材料的热学和电学性质 (PDF 645 KB)
- 高速数据转换 (PDF 1967 KB)
- 使您的仪器放大器设计达到最佳效果 (zhct011.PDF, 897 KB)
- 低成本电流并联监视器 IC 使动圈式仪表设计复兴 (zhct030.PDF, 1.04 MB)
- Demystifying the Operational Transconductance Amplifier (sboa117.HTM, 8 KB)
- Using the LOG114 with the LOG114 to Generate 4mA to 20mA Output (PDF 167 KB)
- 在 PSPICE 中使用德州仪器 (TI) SPICE 模型 (zhca088.HTM, 8 KB)
- PowerPAD™ Thermally Enhanced Package (slma002g.HTM, 8 KB)
- 运算放大器的单电源操作 (PDF 2174 KB)
- Tuning in Amplifiers (PDF 44 KB)
- Op Amp Performance Analysis (PDF 76 KB)
- An Error Analysis of the ISO102 in a Small Signal Measuring Application (PDF 29 KB)
- Level Shifting Signals with Differential Amplifiers (PDF 23 KB)
- Operational Amplifier Macromodels: A Comparison (PDF 59 KB)
LOG114 工具与软件
| 培训内容 |
型号 |
软件/工具类型 |
| LOG114EVM 评估模块 |
LOG114EVM |
开发电路板/EVM |
