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LT1311

更新时间： 2024-11-04 22:55:51
品牌 Logo 应用领域
凌特 - Linear 驱动器转换器
页数 文件大小 规格书
8页 259K
描述
Quad 12MHz, 145ns Settling Precision Current-to-Voltage Converter for Optical Disk Drives

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中文翻译

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LT1311 数据手册

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LT1311  
Quad 12MHz, 145ns Settling  
Precision Current-to-Voltage  
Converter for Optical Disk Drives  
U
FEATURES  
DESCRIPTION  
The LT®1311 is a quad current-to-voltage converter de-  
signed for the demanding requirements of photo diode  
amplification. A new approach to current-to-voltage con-  
version provides excellent DC and AC performance with-  
out external DC trims or AC frequency compensation. The  
LT1311 is ideal for converting multiple photo diode cur-  
rents to voltages and for general purpose matched invert-  
ing amplifier applications.  
■
Four Complete Current-to-Voltage Converters  
■
14-Lead Small Outline Package  
■
Accurate Gain: 20mV/µA, ±4%  
■
■
■
■
■
■
■
Low Offset Error: 250nA Max  
Low Offset Drift: 2.5nA/°C Max  
Fast Settling: 145ns to 0.1% for a 2V Step  
Wide Bandwidth: 12MHz  
Low Noise: 5pA/√Hz  
Low Quiescent Current: 11mA Max  
Wide Supply Range: ±2V to ±18V or 4V to 36V  
The LT1311 contains four current feedback amplifiers,  
each with an internal 20k feedback resistor. A supply  
bypass capacitor is the only external component required  
to convert four signal currents to voltages. Unlike voltage  
feedback-based current-to-voltage converters that oper-  
ate with only a specified value of input capacitance, the  
current feedback LT1311 settles cleanly with any input  
capacitance up to 50pF. Only in the most demanding  
applications will the LT1311 need to be mounted close to  
the photo diodes.  
U
APPLICATIONS  
■
Optical Disk Drive  
Photo Diode Amplifiers  
Focus and Tracking Summing Amplifiers  
■
Color Scanners  
RGB Amplifiers  
Selectable Gain Amplifiers  
■
Matched Inverting Amplifiers  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
U
TYPICAL APPLICATION  
Transient Response  
Photo Diode Current-to-Voltage Converter  
1
2
3
4
5
6
7
14  
IN A  
OUT A  
V
CC  
–
+
10V  
0.1µF  
CIN = 1pF  
13  
12  
+
–
OUT B  
IN B  
BIAS  
IN C  
CIN = 20pF  
11  
5V  
LT1311  
–
+
CIN = 50pF  
OUT C 10  
9
+
–
INPUT = 100µA STEP  
S = ±5V  
IN D  
V
1311 TA02  
8
OUT D  
1311 TA01  
1
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