LOG104 对数放大器
The LOG104 is a versatile integrated circuit that computes the logarithm or log ratio of an input current relative to a reference current.
The LOG104 is tested over a wide dynamic range of input signals. In log ratio applications, a signal current can come from a photodiode, and a reference current from a resistor in series with a precision external reference.
The output signal at VOUT is trimmed to 0.5V per decade of input current, allowing seven decades of input current, dynamic range.
Low DC offset voltage and temperature drift allow accurate measurement of low-level signals over a wide environmental temperature range. The LOG104 is specified over the temperature range –5°C to +75°C, with operation over –40°C to +85°C
| LOG104 | |
| Scale Factor (V/decade) | 0.5 |
| Input Current Range (Min) (nA) | 100 |
| Input Current Range (Max) (mA) | 3.5 |
| Conformity Error (initial 5 decades) (Max) (%) | 0.2 |
| Conformity Error (initial 5 decades) (typ. over temp) (%/degree C) | 0.0001 |
| Offset Voltage (Input Amplifiers) (Max) (mV) | 1.5 |
| Vs (+/-) (Min) (V) | 4.5 |
| Vs (+/-) (Max) (V) | 18 |
| Iq (Max) (mA) | 1.5 |
| Reference Type | External |
| Full-Scale Output Voltage (Min) (+/- V) | 1.2 |
| Full-Scale Output Voltage (Max) (+/- V) | 1.5 |
| Operating Temperature Range (C) | -40 to 85 |
| Pin/Package | 8SOIC |
| Rating | Catalog |
LOG104 特性
- EASY-TO-USE COMPLETE CORE FUNCTION
- HIGH ACCURACY: 0.01% FSO Over 5 Decades
- WIDE INPUT DYNAMIC RANGE:
7.5 Decades, 100pA to 3.5mA - LOW QUIESCENT CURRENT: 1mA
- WIDE SUPPLY RANGE: ±4.5V to ±18V
- APPLICATIONS
- LOG, LOG RATIO, ANTI-LOG COMPUTATION:
Communication, Analytical, Medical, Industrial, Test, General Instrumentation - PHOTODIODE SIGNAL COMPRESSION AMP
- ANALOG SIGNAL COMPRESSION IN FRONT OF ANALOG-TO-DIGITAL(A/D)CONVERTER
- LOG, LOG RATIO, ANTI-LOG COMPUTATION:
LOG104 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 |
| LOG104AID | ACTIVE | -40 to 85 | 8.35 | 1ku | SOIC (D) | 8 | 75 | TUBE | |
| LOG104AIDE4 | ACTIVE | -40 to 85 | 8.35 | 1ku | SOIC (D) | 8 | 75 | TUBE | |
| LOG104AIDG4 | ACTIVE | -40 to 85 | 8.35 | 1ku | SOIC (D) | 8 | 75 | TUBE |
LOG104 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 |
| LOG104AID | Green (RoHS & no Sb/Br) | CU NIPDAUAG | Level-3-260C-168 HR | LOG104AID | LOG104AID |
| LOG104AIDE4 | Green (RoHS & no Sb/Br) | CU NIPDAUAG | Level-3-260C-168 HR | LOG104AIDE4 | LOG104AIDE4 |
| LOG104AIDG4 | Green (RoHS & no Sb/Br) | CU NIPDAUAG | Level-3-260C-168 HR | LOG104AIDG4 | LOG104AIDG4 |
LOG104 应用技术支持与电子电路设计开发资源下载
- LOG104 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 LOG104 with the LOG104 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)
LOG104 工具与软件
| 培训内容 | 型号 | 软件/工具类型 |
| LOG104EVM 评估模块 | LOG104EVM | 开发电路板/EVM |
