LOG112 片上电压参考为 2.5V 的精密对数和对数比放大器
The LOG112 and LOG2112 are versatile integrated circuits that compute the logarithm or log ratio of an input current relative to a reference current. VLOGOUT 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
|
LOG112 |
| Scale Factor (V/decade) |
0.5 |
| Input Current Range (Min) (nA) |
1 |
| 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) |
1.75 |
| Reference Type |
Internal |
| Auxiliary Op Amps |
1 |
| Full-Scale Output Voltage (Min) (+/- V) |
-3.8 |
| Full-Scale Output Voltage (Max) (+/- V) |
3.5 |
| Operating Temperature Range (C) |
-5 to 75 |
| Pin/Package |
14SOIC |
| Rating |
Catalog |
LOG112 特性
- 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
LOG112 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 |
| LOG112AID |
ACTIVE |
-5 to 75 |
9.50 | 1ku |
SOIC (D) | 14 |
50 | TUBE |
|
| LOG112AIDE4 |
ACTIVE |
-5 to 75 |
9.50 | 1ku |
SOIC (D) | 14 |
50 | TUBE |
|
| LOG112AIDR |
ACTIVE |
-5 to 75 |
7.90 | 1ku |
SOIC (D) | 14 |
2500 | LARGE T&R |
|
| LOG112AIDRE4 |
ACTIVE |
-5 to 75 |
7.90 | 1ku |
SOIC (D) | 14 |
2500 | LARGE T&R |
|
LOG112 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 |
| LOG112AID |
Green (RoHS & no Sb/Br) |
CU NIPDAUAG |
Level-3-260C-168 HR |
LOG112AID |
LOG112AID |
| LOG112AIDE4 |
Green (RoHS & no Sb/Br) |
CU NIPDAUAG |
Level-3-260C-168 HR |
LOG112AIDE4 |
LOG112AIDE4 |
| LOG112AIDR |
Green (RoHS & no Sb/Br) |
CU NIPDAUAG |
Level-3-260C-168 HR |
LOG112AIDR |
LOG112AIDR |
| LOG112AIDRE4 |
Green (RoHS & no Sb/Br) |
CU NIPDAUAG |
Level-3-260C-168 HR |
LOG112AIDRE4 |
LOG112AIDRE4 |
LOG112 应用技术支持与电子电路设计开发资源下载
- LOG112 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 LOG112 with the LOG112 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)
- PowerPADTM 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)
LOG112 工具与软件
| 培训内容 |
型号 |
软件/工具类型 |
| LOG112EVM 评估模块 |
LOG112EVM |
开发电路板/EVM |