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PDF XR-8038ACP Data sheet ( Hoja de datos )
| Número de pieza | XR-8038ACP | |
| Descripción | Precision Waveform Generator | |
| Fabricantes | Exar Corporation | |
| Logotipo |  |
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...the analog plus companyTM
XR-8038A
Precision Waveform
Generator
FEATURES
D Low Frequency Drift, 50ppm/°C, Typical
D Simultaneous Sine, Triangle, and Square Wave
Outputs
D Low Sine Wave Distortion - THD ] 1%
D High FM and Triangle Linearity
D Wide Frequency Range 0.001Hz to 200KHz
D Variable Duty Cycle, 2% to 98%
D Low Distortion Variation with Temperature
APPLICATIONS
June 1997-3
D Precision Waveform Generation
D Sweep and FM Generation
D Tone Generation
D Instrumentation and Test Equipment Design
D Precision PLL Design
GENERAL DESCRIPTION
The XR-8038A is a precision waveform generator IC
capable of producing sine, square, triangular, sawtooth,
and pulse waveforms, with a minimum number of external
components and adjustments. The XR-8038A allows the
elimination of the external distortion adjusting resistor
which greatly improves the temperature drift of distortion,
as well as lowering external parts count. Its operating
frequency can be selected over eight decades of
frequency, from 0.001Hz to 200kHz, by the choice of
external R-C components. 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
waveform outputs, (i.e., sine, triangle and square) are
simultaneously available from independent output
terminals.
The XR-8038A monolithic waveform generator uses
advanced processing technology and Schottky-barrier
diodes to enhance its frequency performance.
ORDERING INFORMATION
Part No.
XR-8038ACP
Package
14 Lead 300 mil PDIP
Operating
Temperature Range
0°C to 70°C
Rev. 2.01
E1992
EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 z (510) 668-7000 z FAX (510) 668-7017
1
1 page  
XR-8038A
DC ELECTRICAL CHARACTERISTICS (CONT’D)
Test Conditions: VS = +5V to +15V, TA = 25°C, RL = 1MW, RA = RB = 10kW, C1 = 3300pF, S1 closed, unless
otherwise specified. (See Figure 2.)
Parameter
Output Characteristics (Cont’d)
Output Impedance
Sine-Wave Amplitude
(Peak-to-Peak)
Distortion
Unadjusted
Adjusted
Min.
0.2
Typ.
200
0.22
0.8
0.5
0.3
Max.
Unit Conditions
W
x VSPLY
IOUT = 5mA
RL = 100kW
3 % RL = 1MW4,5
% RL = 1MW4,5
%
Notes
4 Triangle duty cycle set at 50%, use RA and RB.
5 As RL is decreased distortion will increase, RL min [ 50KW.
Bold face parameters are covered by production test and guaranteed over operating temperature range.
Specifications are subject to change without notice
ABSOLUTE MAXIMUM RATINGS
Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36V
Power Dissipation (package limitation)
Plastic Package . . . . . . . . . . . . . . . . . . 625mW
Derate Above +25°C . . . . . . . . . . . . . 5mW/°C
Storage Temperature Range . . . . . . -65°C to +150°C
Rev. 2.01
5
5 Page 
XR-8038A
+15V
RA RB
45
1 12 6
RL
DCA1 DCA2 SA1 SA2 VCC
C1 10 TC Timing
Circuitry
Sine
Converter
2 Sine Wave
SWO
7 FMBI
U1
3 Triangle Wave
TWO
8 FMSI
Square Wave
Converter
9 Square Wave
SQO
FM VEE
XR-8038A
11
–15V
Figure 8. Frequency Modulator
+15V
C1
Sweep Voltage
VCC - (VSUP - 2)
< = VIN & < = VCC
RA RB
45
1 12
6
DCA1 DCA2 SA1 SA2 VCC
10
TC Timing
Circuitry
Sine
Converter
2
SWO
7 FMBI
U1
3
TWO
8 FMSI
VEE
11
Square Wave
Converter
9
SQO
XR-8038A
RL
Sine Wave
Triangle Wave
Square Wave
–15V
Figure 9. Frequency Sweep
Rev. 2.01
11
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet XR-8038ACP.PDF ] | |
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