NTE890 Datasheet, PDF (1/2 Pages) NTE Electronics – Integrated Circuit Voltage to Frequency Converter

NTE890
Integrated Circuit
Voltage to Frequency Converter
Description:
The NTE890 is an integrated circuit in an 8–Lead DIP type package and provides a simple method
of A/D conversion. It has all the inherent advantages of the voltage–to–frequency conversion tech-
nique. The output is a series of constant duration pulses. The frequency of the pulses is proportional
to the applied input voltage. This converter is designed for use in a wide range of data conversion
and remote sensing applications.
Absolute Maximum Ratings: (T_A = +25°C unless otherwise specified)
Supply Voltage, V+ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8V to 22V
Output Sink Current, I_SINK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20mA
Power Dissipation, P_D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500mW
Input Voltage, V_i . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.2V to V+(V)
Operating Temperature Range, T_opr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20° to +75°C
Storage Temperature Range, T_stg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40° to +125°C
Electrical Characteristics: (V+ = +15V, T_A = +25°C unless otherwise specified)
Parameter
Test Conditions
Min
Typ
Max
Supply Current
8V < V+ < 15V
2.0
3.5
6.0
15V < V+ < 22V
2.0
4.5
7.5
Conversion Accuracy Scale Factor
Drift with Temperature
Drift with V+
Input Comparator Offset Voltage
V_IN = 10V, R_S = 14kΩ
V_IN = 10V
V_IN = 1V, 8V < V+ < 18V
0.9
1.0
1.1
–
±100
–
–
0.2
1.0
–
5
10
Offset Current
–
±50
±100
Input Bias Current
–
–100
–300
Common Mode Range
Note 1
0 to V+ –3 0 to V+ –2
–
One–Shot Threshold Voltage
Pin5
0.63
0.66
0.70
Input Bias Current
Pin5
–
–100
–500
Reset V_SAT
Pin5, I = 2.2mA
–
0.15
0.50
Note 1 Input Common Mode Range includes GND.
Unit
mA
mA
kHz/V
ppM/°C
%/V
mV
nA
nA
V
x V+
nA
V