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LOG114AIRGVTG4

更新时间： 2024-01-05 22:38:32
品牌 Logo 应用领域
BB 放大器
页数 文件大小 规格书
30页 606K
描述
Single-Supply, High-Speed, Precision LOGARITHMIC AMPLIFIER

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LOG114AIRGVTG4 技术参数

是否Rohs认证：符合生命周期：Obsolete
零件包装代码：QFN包装说明：4 X 4 MM, GREEN, PLASTIC, QFN-16
针数：16Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.32Is Samacsys：N
模拟集成电路 - 其他类型：LOG OR ANTILOG AMPLIFIERJESD-30 代码：S-PQCC-N16
JESD-609代码：e4长度：4 mm
湿度敏感等级：2负电源电压最大值（Vsup）：-5.5 V
负电源电压最小值（Vsup）：-2.4 V标称负供电电压 (Vsup)：-5 V
最大负输入电压：-4 V功能数量：1
端子数量：16最高工作温度：70 °C
最低工作温度：封装主体材料：PLASTIC/EPOXY
封装代码：HVQCCN封装等效代码：LCC16,.16SQ,25
封装形状：SQUARE封装形式：CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
峰值回流温度（摄氏度）：260最大正输入电压：4 V
电源：5 V认证状态：Not Qualified
座面最大高度：1 mm子类别：Analog Computational Functions
最大供电电流 (Isup)：15 mA最大供电电压 (Vsup)：5.5 V
最小供电电压 (Vsup)：2.4 V标称供电电压 (Vsup)：5 V
表面贴装：YES技术：BIPOLAR
温度等级：COMMERCIAL端子面层：Nickel/Palladium/Gold (Ni/Pd/Au)
端子形式：NO LEAD端子节距：0.65 mm
端子位置：QUAD处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：4 mmBase Number Matches：1

LOG114AIRGVTG4 数据手册

 浏览型号LOG114AIRGVTG4的Datasheet PDF文件第2页浏览型号LOG114AIRGVTG4的Datasheet PDF文件第3页浏览型号LOG114AIRGVTG4的Datasheet PDF文件第4页浏览型号LOG114AIRGVTG4的Datasheet PDF文件第5页浏览型号LOG114AIRGVTG4的Datasheet PDF文件第6页浏览型号LOG114AIRGVTG4的Datasheet PDF文件第7页 
LOG114  
SBOS301A − MAY 2004 − REVISED MARCH 2007  
Single-Supply, High-Speed, Precision  
LOGARITHMIC AMPLIFIER  
FD EATURES  
DESCRIPTION  
The LOG114 is specifically designed for measuring  
ADVANTAGES:  
− Tiny for High Density Systems  
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).  
− Precision on One Supply  
− Fast Over Eight Decades  
− Fully-Tested Function  
D
D
D
D
D
D
D
D
TWO SCALING AMPLIFIERS  
WIDE INPUT DYNAMIC RANGE:  
Eight Decades, 100pA to 10mA  
2.5V REFERENCE  
STABLE 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  
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 V  
has a scale factor of 0.375V  
LOGOUT  
AD PPLICATIONS  
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  
ONET ERBIUM-DOPED FIBER OPTIC  
AMPLIFIER (EDFA)  
D
D
D
D
LASER OPTICAL DENSITY MEASUREMENT  
PHOTODIODE SIGNAL COMPRESSION AMP  
LOG, LOG-RATIO FUNCTION  
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.  
ANALOG SIGNAL COMPRESSION IN FRONT  
OF ANALOG-TO-DIGITAL (ADC) CONVERTER  
R
R
5
6
D
ABSORBANCE MEASUREMENT  
−
V
IN  
4
+IN  
LOGOUT  
4
(2)  
10  
11  
9
LOG114  
Q
1
Ω
Ω
Ω
200  
1250  
I
1
(1)  
R
R
2
1
4
A
1
V
CM IN  
(3)  
5
A
A
V
4
O4  
5
12  
(4)  
A
3
Q
I
and I are current inputs  
2
2
1
+IN  
from a photodiode  
or other current source  
13  
15  
Ω
(1)  
200  
1250  
I
2
R
R
4
3
V
3
5
O5  
A
2
R
V
REF  
16  
I
REF  
REF  
1
NOTES: (1) Thermally dependent R and R  
1
3
REF  
provide temperature compensation.  
2.5V  
×
= 0.375 log(I /I ).  
1 2  
(2) V  
LOGOUT  
8
6
7
14  
V
Com  
×
×
K log(I /I )  
(3) V = 0.375  
REF GND  
O4  
1 2  
K = 1 + R /R .  
(4) Differential Amplifier (A ) Gain = 6.25  
−
−
IN  
V+  
V
6
5
5
3
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments  
semiconductor products and disclaimers thereto appears at the end of this data sheet.  
All trademarks are the property of their respective owners.  
ꢀꢁ ꢂ ꢃꢄ ꢅ ꢆꢇ ꢂꢈ ꢃ ꢉꢆꢉ ꢊꢋ ꢌꢍ ꢎ ꢏꢐ ꢑꢊꢍꢋ ꢊꢒ ꢓꢔ ꢎ ꢎ ꢕꢋꢑ ꢐꢒ ꢍꢌ ꢖꢔꢗ ꢘꢊꢓ ꢐꢑꢊ ꢍꢋ ꢙꢐ ꢑꢕꢚ ꢀꢎ ꢍꢙꢔ ꢓꢑꢒ  
ꢓ ꢍꢋ ꢌꢍꢎ ꢏ ꢑꢍ ꢒ ꢖꢕ ꢓ ꢊ ꢌꢊ ꢓ ꢐ ꢑꢊ ꢍꢋꢒ ꢖ ꢕꢎ ꢑꢛꢕ ꢑꢕ ꢎ ꢏꢒ ꢍꢌ ꢆꢕꢜ ꢐꢒ ꢇꢋꢒ ꢑꢎ ꢔꢏ ꢕꢋꢑ ꢒ ꢒꢑ ꢐꢋꢙ ꢐꢎ ꢙ ꢝ ꢐꢎ ꢎ ꢐ ꢋꢑꢞꢚ  
ꢀꢎ ꢍ ꢙꢔꢓ ꢑ ꢊꢍ ꢋ ꢖꢎ ꢍ ꢓ ꢕ ꢒ ꢒ ꢊꢋ ꢟ ꢙꢍ ꢕ ꢒ ꢋꢍꢑ ꢋꢕ ꢓꢕ ꢒꢒ ꢐꢎ ꢊꢘ ꢞ ꢊꢋꢓ ꢘꢔꢙ ꢕ ꢑꢕ ꢒꢑꢊ ꢋꢟ ꢍꢌ ꢐꢘ ꢘ ꢖꢐ ꢎ ꢐꢏ ꢕꢑꢕ ꢎ ꢒꢚ  
Copyright 2004−2007, Texas Instruments Incorporated  
www.ti.com  
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