©2001 Fairchild Semiconductor Corporation
学会说话
印堂凹陷Rev. 1.0.0
Features
•Guaranteed linearity: 0.01% max.•Low power dissipation: 15mW at 5V
•Wide range of full scale frequency: 1Hz to 100KHz •Pul output compatible with all logic forms
•
Wide dynamic range: 100dB min at 10KHz full scale frequency
Description
This voltage to frequency converter provides the output pul train at a frequency precily proportional to the applied input voltage. The KA331 can operate at power supplies as low as 4.0V and be changed output frequency from 1Hz to 100KHz. It is ideally suited for u in simple low-cost circuit for analog-to digital conversion, long term integration, linear frequency modulation or demodulation,frequency-to-voltage conversion, and many other functions.
Internal Block Diagram
KA331
V-F Converter
8-DIP
1
KA331
2
Absolute Maximum Ratings (T A = 25°C)
Electrical Characteristics
Parameter
Symbol Value Unit Supply Voltage V CC 40V Input Voltage金融的作用
V I -0.2 ~ + V CC V Operating Temperature Range T OPR 0 ~ +70°C Power Dissipation
不敢造次的意思
P D
赵括纸上谈兵500
mW
Parameter
Symbol Conditions Min.Typ.Max.Unit VFC Non-Linearity
VFCNL 4.5 ≤ V CC ≤ 20V -±0.003±0.01% Full-Scale Conversion Accuracy Scale Factor ACCUR V I = -10V, R S = 14K Ω0.90
1.00 1.10KHz/V Chang Of Gain With V CC V CC ∆G/V CC
4.5V ≤ V CC ≤ 10V -0.010.1%/V
10V ≤ V CC ≤ 40V -0.0060.06 Rated Full - Scale Frequency f
V I = -10V
10.0
--KHz INPUT COMPARATOR Offt Voltage V IO 0°C ≤ T A ≤ +70°C
-±3±10mV Bias Current I BIAS ---80-300nA Offt Current I IO --±8±100nA Common-Mode Range V CM
0°C ≤ T A ≤ +70°C
-0.2
-V CC -2.0
V
流浪的孩子
TIMER (PIN 5)
Timer Threshold Voltage V TH -0.630.6670.701×V CC Input Bias Current
I BIAS
V CC = 15V, 0V ≤ V 5 ≤ 9.9V -±10±100nA V 5 = 10V
-2001000nA Saturation Voltage
V SAT
I = 5mA
-0.22
0.5
V
CURRENT SOURCE (PIN 1) Output Current I O R S = 14K Ω, V 1 = 0V 116136156µA Change with Voltage ∆I O /∆V 1 0V ≤ V 1≤ 10V
-0.2 1.0µA Current Source Off Leakage I LKG
--0.02
10.0
儿童白斑nA
REFERENCE VOLTAGE (PIN 2) Reference Voltage V REF - 1.70 1.89 2.08V DC Stability vs Temperature ST T --±60-ppm/°C Stability vs Time, 1000Hours ST T
--±0.1
-%
LOGIC OUTPUT (Pin 3) Saturation Voltage V SAT I = 5mA -0.150.50V I = 3.2mA
学科计划
-0.100.40 Off Leakage I LKG
--±0.05
1.0
µA
SUPPLY CURRENT Supply Current
I CC
V CC = 5V 1.5 3.0 6.0mA
V CC = 40V
2.0
4.0
8.0
KA331
3
Typical Applications
Figure 1.Precision Voltage-to-Frequency Converter, 100KHz Full-Scale
Figure 2.Simple Frequency-to-Voltage Converter, 10KHz Full-Scale
Figure 3.
Light Intensity to Frequency Converter
KA331
Mechanical Dimensions
Package
Dimensions in millimeters
8-DIP
4
KA331 Ordering Information
Product Number Package Operating Temperature
KA3318-DIP0 ~ + 70°C
5
