NTE864 Datasheet, PDF (1/3 Pages) NTE Electronics – Integrated Circuit Precision Waveform Generator

NTE864
Integrated Circuit
Precision Waveform Generator
Description:
The NTE864 is a precision waveform generator in a 14–Lead DIP type package capable of producing
sine, square, triangular, sawtooth and pulse waveform. Its operating frequency can be selected over
eight decades of frequency, from 0.001Hz to 200kHz. The frequency of oscillation is highly stable over
a wide range of temperature and supply voltage changes. Both full frequency sweeping as well as
smaller frequency variations (FM) can be accomplished with an external control voltage. Each of the
three basic waveforms, i.e., sinewave, triangle and square wave outputs are available simultaneously,
from independent output terminals.
Applications:
D Precision Waveform Generation: Sine, Triangle, Square, Pulse
D Sweep and FM Generation
D Tone Generation
D Instrumentation and Test Equipment Design
D Precision PLL Design
Absolute Maximum Ratings:
Power Supply Voltage, V_CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36V
Power Dissipation, P_D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 625mW
Derate Above +25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mW/°C
Storage Temperature Range, T_stg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65° to +150°C
Operating Temperature Range, T_opr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0° to +70°C
System Description:
The NTE864 precision waveform generator produces highly stable and sweepable square, triangle,
and sine waves across eight frequency decades. The device time base employs resistors and a ca-
pacitor for frequency and duty cycle determination. The generator contains dual comparators, a flip–
flop driving a switch, current sources, buffers, and a sine wave converter. Three identical frequency
waveforms are simultaneously available. Supply voltage can range from 10V to 30V, or ±5V to ±15V
with dual supplies.
Unadjusted sine wave distortion is typically less than 0.7%, with Pin1 open and 82kΩ from Pin12 to
Pin11 (–V or GND). Sine wave distortion may be improved by including two 100kΩ potentiometers
between V_CC and –V (or GND), with one wiper connected to Pin1 and the other connected to Pin12.
Small frequency deviation (FM) is accomplished by applying modulation voltage to Pin7 and Pin8;
large frequency deviation (sweeping) is accomplished by applying voltage to Pin8 only. Sweep range
is typically 1000:1.