LM331 [FAIRCHILD]
V-F Converter; V -F转换器
| 型号： | LM331 |
| 厂家： | 
FAIRCHILD SEMICONDUCTOR |
| 描述： | V-F Converter |
| 文件： | 总6页 (文件大小：52K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
www.fairchildsemi.com
LM331
V-F Converter
Features
Description
• Guaranteed linearity: 0.01% max.
This voltage to frequency converter provides the output
pulse train at a frequency precisely proportional to the
applied input voltage. The LM331 can operate at power
supplies as low as 4.0V and be changed output frequency
from 1Hz to 100KHz. It is ideally suited for use 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.
• Low power dissipation: 15mW at 5V
• Wide range of full scale frequency: 1Hz to 100KHz
• Pulse output compatible with all logic forms
• Wide dynamic range: 100dB min at 10KHz full scale
frequency
8-DIP
1
Internal Block Diagram
Rev. 1.0.0
©2001 Fairchild Semiconductor Corporation
LM331
Absolute Maximum Ratings (T = 25°C)
A
Parameter
Symbol
Value
40
Unit
V
Supply Voltage
Input Voltage
V
CC
V
-0.2 ~ + V
V
I
CC
Operating Temperature Range
Power Dissipation
T
0 ~ +70
500
°C
OPR
P
D
mW
Electrical Characteristics
Parameter
Symbol
VFCNL
ACCUR
Conditions
Min. Typ.
Max.
Unit
VFC Non-Linearity
4.5 ≤ V
≤ 20V
-
±0.003 ±0.01 % Full-Scale
CC
Conversion Accuracy Scale Factor
V = -10V, R = 14KΩ 0.90 1.00
1.10
0.1
0.06
-
KHz/V
%/V
I
S
Chang Of Gain With V
V
∆G/V
4.5V ≤ V
≤ 10V
≤ 40V
-
-
0.01
0.006
-
CC
CC
CC
CC
10V ≤ V
CC
Rated Full - Scale Frequency
INPUT COMPARATOR
Offset Voltage
f
V = -10V
10.0
KHz
I
V
0°C ≤ T ≤ +70°C
-
-
-
±3
-80
±8
±10
-300
±100
mV
nA
nA
IO
A
Bias Current
I
-
-
BIAS
Offset Current
I
IO
V
CC
2.0
-
Common-Mode Range
V
0°C ≤ T ≤ +70°C
-0.2
-
V
CM
A
TIMER (PIN 5)
Timer Threshold Voltage
V
-
0.63 0.667 0.701
×V
CC
TH
V
= 15V,
5
CC
0V ≤ V ≤ 9.9V
Input Bias Current
I
-
±10
±100
nA
BIAS
V = 10V
5
-
-
200
1000
0.5
nA
V
Saturation Voltage
V
I = 5mA
0.22
SAT
CURRENT SOURCE (PIN 1)
Output Current
I
R = 14KΩ, V = 0V 116 136
156
1.0
µA
µA
nA
O
S
1
Change with Voltage
∆I /∆V
O
0V ≤ V ≤ 10V
-
-
0.2
1
1
Current Source Off Leakage
REFERENCE VOLTAGE (PIN 2)
Reference Voltage
I
-
0.02
10.0
LKG
V
-
-
-
1.70 1.89
2.08
V
DC
REF
Stability vs Temperature
Stability vs Time, 1000Hours
LOGIC OUTPUT (Pin 3)
ST
-
-
±60
-
-
ppm/°C
T
T
ST
±0.1
%
I = 5mA
I = 3.2mA
-
-
-
-
0.15
0.10
0.50
0.40
1.0
Saturation Voltage
V
V
SAT
Off Leakage
I
±0.05
µA
LKG
SUPPLY CURRENT
V
V
= 5V
1.5
2.0
3.0
4.0
6.0
8.0
CC
CC
Supply Current
I
mA
CC
= 40V
2
LM331
Typical Applications
LM331
Figure 1. Precision Voltage-to-Frequency Converter, 100KHz Full-Scale
LM331
Figure 2. Simple Frequency-to-Voltage Converter, 10KHz Full-Scale
LM331
Figure 3. Light Intensity to Frequency Converter
3
LM331
Mechanical Dimensions
Package
Dimensions in millimeters
8-DIP
6.40 ±0.20
0.252 ±0.008
#1
#4
#8
#5
3.30 ±0.30
0.130 ±0.012
5.08
0.200
MAX
7.62
0.300
3.40 ±0.20
0.134 ±0.008
0.33
MIN
0.013
4
LM331
Ordering Information
Product Number
Package
8-DIP
Operating Temperature
LM331N
0 ~ + 70°C
5
LM331
DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY
PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY
LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER
DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES
OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR
CORPORATION. As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the body,
or (b) support or sustain life, and (c) whose failure to
perform when properly used in accordance with
instructions for use provided in the labeling, can be
reasonably expected to result in a significant injury of the
user.
2. A critical component in any component of a life support
device or system whose failure to perform can be
reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
www.fairchildsemi.com
5/22/01 0.0m 001
Stock#DSxxxxxxxx
2001 Fairchild Semiconductor Corporation
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