Intersil Corporation ICL8038 Datasheet
ICL8038
Data Sheet September 1998 File Number 2864.3
Precision Waveform Generator/Voltage
Controlled Oscillator
The ICL8038 waveform generator is a monolithic integrated
circuit capable of producing high accuracy sine, square,
triangular, sawtooth and pulse waveforms with a minimum of
external components. The frequency (or repetition rate) can
be selected externally from 0.001Hz to more than 300kHz
using either resistors or capacitors, and frequency
modulation and sweeping can be accomplished with an
external voltage. The ICL8038 is fabricated with advanced
monolithic technology, using Schottky barrier diodes and thin
film resistors, and the output is stable over a wide range of
temperature and supply variations. These devices may be
interfaced with phase locked loop circuitry to reduce
temperature drift to less than 250ppm/
o
C.
Features
• Low Frequency Drift with Temperature. . . . . . .250ppm/oC
• Low Distortion. . . . . . . . . . . . . . . . 1% (Sine Wave Output)
• High Linearity . . . . . . . . . . . 0.1% (Triangle Wave Output)
• Wide Frequency Range . . . . . . . . . . . 0.001Hz to 300kHz
• Variable Duty Cycle . . . . . . . . . . . . . . . . . . . . . 2% to 98%
• High Level Outputs. . . . . . . . . . . . . . . . . . . . . .TTL to 28V
• Simultaneous Sine, Square, and Triangle Wave
Outputs
• Easy to Use - Just a Handful of External Components
Required
Ordering Information
PART NUMBER STABILITY TEMP. RANGE (oC) PACKAGE PKG. NO.
ICL8038CCPD 250ppm/oC (Typ) 0 to 70 14 Ld PDIP E14.3
ICL8038CCJD 250ppm/oC (Typ) 0 to 70 14 Ld CERDIP F14.3
ICL8038BCJD 180ppm/oC (Typ) 0 to 70 14 Ld CERDIP F14.3
ICL8038ACJD 120ppm/oC (Typ) 0 to 70 14 Ld CERDIP F14.3
Pinout
Functional Diagram
ICL8038
SINE WAVE
ADJUST
WAVE OUT
TRIANGLE
DUTY CYCLE
FREQUENCY
ADJUST
FM BIAS
SINE
OUT
V+
(PDIP, CERDIP)
TOP VIEW
1
2
3
4
5
6
7
14
NC
13
NC
SINE WAVE
12
ADJUST
11
V- OR GND
TIMING
10
CAPACITOR
SQUARE
9
WAVE OUT
FM SWEEP
8
INPUT
CURRENT
SOURCE
CURRENT
SOURCE
#1
I
10
2I
C
#2
92
COMPARATOR
#1
COMPARATOR
#2
FLIP-FLOP
BUFFERBUFFER
SINE
CONVERTER
3
V+
6
V- OR GND
11
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
| Copyright © Intersil Corporation 1999
ICL8038
Absolute Maximum Ratings Thermal Information
Supply Voltage (V- to V+). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36V
Input Voltage (Any Pin) . . . . . . . . . . . . . . . . . . . . . . . . . . . . V- to V+
Input Current (Pins 4 and 5). . . . . . . . . . . . . . . . . . . . . . . . . . . 25mA
Output Sink Current (Pins 3 and 9) . . . . . . . . . . . . . . . . . . . . . 25mA
Operating Conditions
Temperature Range
ICL8038AC, ICL8038BC, ICL8038CC . . . . . . . . . . . . 0oC to 70oC
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTE:
1. θJA is measured with the component mounted on an evaluation PC board in free air.
Thermal Resistance (Typical, Note 1) θJA (oC/W) θJC (oC/W)
CERDIP Package. . . . . . . . . . . . . . . . . 75 20
PDIP Package . . . . . . . . . . . . . . . . . . . 115 N/A
Maximum Junction Temperature (Ceramic Package) . . . . . . . .175oC
Maximum Junction Temperature (Plastic Package) . . . . . . . .150oC
Maximum Storage Temperature Range. . . . . . . . . . -65oC to 150oC
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . 300oC
Die Characteristics
Back Side Potential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V-
Electrical Specifications V
PARAMETER SYMBOL
Supply Voltage Operating Range V
= ±10V or +20V, TA = 25oC, RL = 10kΩ, Test Circuit Unless Otherwise Specified
SUPPLY
TEST
CONDITIONS
SUPPLY
ICL8038CC ICL8038BC ICL8038AC
UNITSMIN TYP MAX MIN TYP MAX MIN TYP MAX
V+ Single Supply +10 - +30 +10 - +30 +10 - +30 V
V+, V- Dual Supplies ±5-±15 ±5-±15 ±5-±15 V
Supply Current I
SUPPLYVSUPPLY
= ±10V
12 20 - 12 20 - 12 20 mA
(Note 2)
FREQUENCY CHARACTERISTICS (All Waveforms)
Max. Frequency of Oscillation f
Sweep Frequency of FM Input f
MAX
SWEEP
100 - - 100 - - 100 - - kHz
-10- -10- -10- kHz
Sweep FM Range (Note 3) - 35:1 - - 35:1 - - 35:1 FM Linearity 10:1 Ratio - 0.5 - - 0.2 - - 0.2 - %
Frequency Drift with
∆f/∆T0oC to 70oC - 250 - - 180 - - 120 ppm/oC
Temperature (Note 5)
Frequency Driftwith Supply Voltage ∆f/∆V Over Supply
- 0.05 - - 0.05 - 0.05 - %/V
Voltage Range
OUTPUT CHARACTERISTICS
Square Wave
Leakage Current I
Saturation Voltage V
Rise Time t
Fall Time t
Typical Duty Cycle Adjust
OLK
∆D 2 98 2 - 98 2 - 98 %
V9 = 30V - - 1 - - 1 - - 1 µA
SATISINK
R
F
= 2mA - 0.2 0.5 - 0.2 0.4 - 0.2 0.4 V
RL = 4.7kΩ - 180 - - 180 - - 180 - ns
RL = 4.7kΩ -40- -40- -40- ns
(Note 6)
Triangle/Sawtooth/Ramp -
Amplitude V
TRIAN-
GLE
R
= 100kΩ 0.30 0.33 - 0.30 0.33 - 0.30 0.33 - xV
TRI
Linearity - 0.1 - - 0.05 - - 0.05 - %
Output Impedance Z
OUTIOUT
= 5mA - 200 - - 200 - - 200 - Ω
2
SUPPLY
ICL8038
Electrical Specifications V
PARAMETER SYMBOL
= ±10V or +20V, TA = 25oC, RL = 10kΩ, Test Circuit Unless Otherwise Specified (Continued)
SUPPLY
TEST
CONDITIONS
ICL8038CC ICL8038BC ICL8038AC
UNITSMIN TYP MAX MIN TYP MAX MIN TYP MAX
Sine Wave
Amplitude V
SINERSINE
THD THD RS = 1MΩ
= 100kΩ 0.2 0.22 - 0.2 0.22 - 0.2 0.22 - xV
- 2.0 5 - 1.5 3 - 1.0 1.5 %
SUPPLY
(Note 4)
THD Adjusted THD Use Figure 4 - 1.5 - - 1.0 - - 0.8 - %
NOTES:
2. RA and RB currents not included.
3. V
= 20V; RA and RB = 10kΩ, f ≅ 10kHz nominal; can be extended 1000 to 1. See Figures 5A and 5B.
SUPPLY
4. 82kΩ connected between pins 11 and 12, Triangle Duty Cycle set at 50%. (Use RA and RB.)
5. Figure 1, pins 7 and 8 connected, V
= ±10V. See Typical Curves for T.C. vs V
SUPPLY
SUPPLY
.
6. Not tested, typical value for design purposes only.
Test Conditions
PARAMETER R
A
Supply Current 10kΩ 10kΩ 10kΩ 3.3nF Closed Current Into Pin 6
Sweep FM Range (Note 7) 10kΩ 10kΩ 10kΩ 3.3nF Open Frequency at Pin 9
Frequency Drift with Temperature 10kΩ 10kΩ 10kΩ 3.3nF Closed Frequency at Pin 3
Frequency Drift with Supply Voltage (Note 8) 10kΩ 10kΩ 10kΩ 3.3nF Closed Frequency at Pin 9
Output Amplitude (Note 10)
Sine 10kΩ 10kΩ 10kΩ 3.3nF Closed Pk-Pk Output at Pin 2
Triangle 10kΩ 10kΩ 10kΩ 3.3nF Closed Pk-Pk Output at Pin 3
Leakage Current (Off) (Note 9) 10kΩ 10kΩ 3.3nF Closed Current into Pin 9
Saturation Voltage (On) (Note 9) 10kΩ 10kΩ 3.3nF Closed Output (Low) at Pin 9
Rise and Fall Times (Note 11) 10kΩ 10kΩ 4.7kΩ 3.3nF Closed Waveform at Pin 9
Duty Cycle Adjust (Note 11)
Max 50kΩ ~1.6kΩ 10kΩ 3.3nF Closed Waveform at Pin 9
Min ~25kΩ 50kΩ 10kΩ 3.3nF Closed Waveform at Pin 9
Triangle Waveform Linearity 10kΩ 10kΩ 10kΩ 3.3nF Closed Waveform at Pin 3
Total Harmonic Distortion 10kΩ 10kΩ 10kΩ 3.3nF Closed Waveform at Pin 2
NOTES:
7. The hi and lo frequencies can be obtained by connecting pin 8 to pin 7 (fHI) and then connecting pin 8 to pin 6 (fLO). Otherwise apply Sweep
Voltage at pin 8 (2/3V
SUPPLY
+2V) ≤ V
SWEEP
≤ V
SUPPLY
5.3V and 10V with respect to ground.
8. 10V ≤ V+ ≤ 30V, or ±5V ≤ V
SUPPLY
≤±15V.
9. Oscillation can be halted by forcing pin 10 to +5V or -5V.
10. Output Amplitude is tested under static conditions by forcing pin 10 to 5V then to -5V.
11. Not tested; for design purposes only.
where V
R
B
SUPPLY
R
L
CSW1MEASURE
is the total supply voltage. In Figure 5B, pin 8 should vary between
3
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