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LOG104

現行

比例因子為 0.5-V/十年的精密對數和對數比放大器

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產品規格表

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功能相同，但引腳輸出與所比較的裝置不同
LOG200 預覽 具有光二極體偏壓和暗電流修正的高速精密對數放大器 Upgraded performance and with integrated features. Smaller QFN package option.

LOG104

現行
產品規格表 立即訂購

產品詳細資料

Scale factor (V/decade) 0.5 Input current range (min) (nA) 100 Input current range (max) (mA) 3.5 Offset voltage (input amplifiers) (max) (mV) 1.5 Vs (±) (min) (V) 4.5 Vs (±) (max) (V) 18 Iq (max) (mA) 1.5 Dynamic range (typ) (dB) 150 Reference type External Auxiliary op amps 0 Full-scale output voltage (min) (±V) 1.2 Full-scale output voltage (max) (±V) 1.5 Conformity error (initial 5 decades) (max) (%) 0.2 Conformity error (initial 5 decades) (typ. over temp) (%/°C) 0.0001 Operating temperature range (°C) -40 to 85 Specified voltage (±V) 5 Rating Catalog
Scale factor (V/decade) 0.5 Input current range (min) (nA) 100 Input current range (max) (mA) 3.5 Offset voltage (input amplifiers) (max) (mV) 1.5 Vs (±) (min) (V) 4.5 Vs (±) (max) (V) 18 Iq (max) (mA) 1.5 Dynamic range (typ) (dB) 150 Reference type External Auxiliary op amps 0 Full-scale output voltage (min) (±V) 1.2 Full-scale output voltage (max) (±V) 1.5 Conformity error (initial 5 decades) (max) (%) 0.2 Conformity error (initial 5 decades) (typ. over temp) (%/°C) 0.0001 Operating temperature range (°C) -40 to 85 Specified voltage (±V) 5 Rating Catalog
SOIC (D) 8 29.4 mm² 4.9 x 6
  • 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

Note: Protected under US Patent #6,667,650; other patents pending.
All trademarks are the property of their respective owners.
  • 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

Note: Protected under US Patent #6,667,650; other patents pending.
All trademarks are the property of their respective owners.

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.

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.
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類型 標題 日期
* Data sheet Precision Logarithmic and Log Ratio Amplifier datasheet (Rev. C) 2005年 4月 4日

設計與開發

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模擬型號

LOG104 PSpice Model (Rev. A)

SBOC043A.ZIP (55 KB) - PSpice Model
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模擬型號

LOG104 TINA-TI Reference Design (Rev. B)

SBOC076B.TSC (134 KB) - TINA-TI Reference Design
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模擬型號

LOG104 TINA-TI Spice Model (Rev. A)

SBOM162A.ZIP (6 KB) - TINA-TI Spice Model
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模擬工具

PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
要求
模擬工具

TINA-TI — 基於 SPICE 的類比模擬程式

TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
使用指南: PDF
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SOIC (D) 8 Ultra Librarian
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訂購與品質

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  • 認證摘要
  • 進行中持續性的可靠性監測
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