Maxim MAX038CPP, MAX038EPP, MAX038CWP, MAX038C-D, MAX038EWP Datasheet

KIT EVALUATION

AVAILABLE

Generator

Description

precision function high-frequency triangle, waveforms with a

. The output frequency range of 0.1Hz to 5V bandgap voltage and capacitor. The

wide range by applying pulse-width modulasawtooth waveforms. sweeping are

. The duty cycle and

.

can be selected at code at two output signal for all

is symmetrical around output can drive up

from the internal cycle—regardless of —to synchronize internal oscillator can

be synchronized to an external TTL clock connected to PDI.

____________________________Features

♦0.1Hz to 20MHz Operating Frequency Range

♦Triangle, Sawtooth, Sine, Square, and Pulse Waveforms

♦Independent Frequency and Duty-Cycle Adjustments

♦350 to 1 Frequency Sweep Range

♦15% to 85% Variable Duty Cycle

♦Low-Impedance Output Buffer: 0.1Ω

♦Low-Distortion Sine Wave: 0.75%

♦Low 200ppm/°C Temperature Drift

______________Ordering Information

PART	TEMP. RANGE	PIN-PACKAGE
MAX038CPP	0°C to +70°C	20 Plastic DIP
MAX038CWP	0°C to +70°C	20 SO
MAX038C/D	0°C to +70°C	Dice*
MAX038EPP	-40°C to +85°C	20 Plastic DIP
MAX038EWP	-40°C to +85°C	20 SO

*Contact factory for dice specifications.

MAX038

________________________Applications				__________________Pin Configuration
	Precision Function Generators
	Voltage-Controlled Oscillators
	Frequency Modulators			TOP VIEW
	Pulse-Width Modulators			REF	1					0	V-
	Phase-Locked Loops			GND	2					9	OUT
	Frequency Synthesizer			A0	3					8	GND
	FSK Generator—Sine and Square Waves			A1	4	MAX038				7	V+
				COSC	5					6	DV+
				GND	6					5	DGND
				DADJ	7					4	SYNC
				FADJ	8					3	PDI
				GND	9					2	PDO
				IIN	1					1	GND
						DIP/SO
			________________________________________________________________ Maxim Integrated Products 1

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High-Frequency Waveform Generator

MAX038

ABSOLUTE MAXIMUM RATINGS

V+ to GND ................................................................		- 0.3V to +6V	Continuous Power Dissipation (TA = +70°C)
DV+ to DGND...........................................................		- 0.3V to +6V	Plastic DIP (derate 11.11mW/°C above +70°C)		..........889mW
V- to GND .................................................................		+0.3V to -6V	SO (derate 10.00mW/°C above +70°C).......................		800mW
Pin Voltages			CERDIP (derate 11.11mW/°C above +70°C)...............		889mW
IIN, FADJ, DADJ, PDO .....................	(V- - 0.3V) to (V+ + 0.3V)		Operating Temperature Ranges
COSC .....................................................................		+0.3V to V-	MAX038C_ _ .......................................................		0°C to +70°C
A0, A1, PDI, SYNC, REF.........................................		- 0.3V to V+	MAX038E_ _ ....................................................	-40°C to +85°C
GND to DGND ................................................................		±0.3V	Maximum Junction Temperature .....................................		+150°C
Maximum Current into Any Pin .........................................		±50mA	Storage Temperature Range .............................	-65°C to +150°C
OUT, REF Short-Circuit Duration to GND, V+, V-		...............30sec	Lead Temperature (soldering, 10sec) .............................		+300°C

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

ELECTRICAL CHARACTERISTICS

(Circuit of Figure 1, GND = DGND = 0V, V+ = DV+ = 5V, V- = -5V, VDADJ = VFADJ = VPDI = VPDO = 0V, CF = 100pF, RIN = 25kΩ , RL = 1kΩ , CL = 20pF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)

PARAMETER	SYMBOL			CONDITIONS	MIN	TYP	MAX	UNITS
FREQUENCY CHARACTERISTICS
Maximum Operating Frequency		Fo		15pCF ≤ 15pF, IIN = 500µA	20.0	40.0		MHz
Frequency Programming		IIN		VFADJ = 0V	2.50		750	µA
Current				VFADJ = -3V	1.25		375
IIN Offset Voltage		VIN				±1.0	±2.0	mV
Frequency Temperature		Fo/°C		VFADJ = 0V		600		ppm/°C
Coefficient		Fo/°C		VFADJ = -3V		200
	( Fo/Fo)			V- = -5V, V+ = 4.75V to 5.25V		±0.4	±2.00
Frequency Power-Supply		V+
								%/V
Rejection	( Fo/Fo)			V+ = 5V, V- = -4.75V to -5.25V		±0.2	±1.00
		V-
OUTPUT AMPLIFIER (applies to all waveforms)
Output Peak-to-Peak Symmetry		VOUT				±4		mV
Output Resistance		ROUT				0.1	0.2	Ω
Output Short-Circuit Current		IOUT		Short circuit to GND		40		mA
SQUARE-WAVE OUTPUT (RL = 100Ω )
Amplitude		VOUT			1.9	2.0	2.1	VP-P
Rise Time		tR		10% to 90%		12		ns
Fall Time		tF		90% to 10%		12		ns
Duty Cycle		dc		VDADJ = 0V, dc = tON/t x 100%	47	50	53	%
TRIANGLE-WAVE OUTPUT (RL = 100Ω )
Amplitude		VOUT			1.9	2.0	2.1	VP-P
Nonlinearity				Fo = 100kHz, 5% to 95%		0.5		%
Duty Cycle		dc		VDADJ = 0V (Note 1)	47	50	53	%
SINE-WAVE OUTPUT (RL = 100Ω )
Amplitude		VOUT			1.9	2.0	2.1	VP-P
Total Harmonic Distortion		THD		Duty cycle adjusted to 50%		0.75		%
				Duty cycle unadjusted		1.50

2 _______________________________________________________________________________________

High-Frequency Waveform Generator

ELECTRICAL CHARACTERISTICS (continued)

(Circuit of Figure 1, GND = DGND = 0V, V+ = DV+ = 5V, V- = -5V, VDADJ = VFADJ = VPDI = VPDO = 0V, CF = 100pF, RIN = 25kΩ , RL = 1kΩ , CL = 20pF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)

PARAMETER	SYMBOL	CONDITIONS	MIN	TYP	MAX	UNITS
SYNC OUTPUT
Output Low Voltage	VOL	ISINK = 3.2mA		0.3	0.4	V
Output High Voltage	VOH	ISOURCE = 400µA	2.8	3.5		V
Rise Time	tR	10% to 90%, RL = 3kΩ , CL = 15pF		10		ns
Fall Time	tF	90% to 10%, RL = 3kΩ , CL = 15pF		10		ns
Duty Cycle	dcSYNC			50		%
DUTY-CYCLE ADJUSTMENT (DADJ)
DADJ Input Current	IDADJ		190	250	320	µA
DADJ Voltage Range	VDADJ			±2.3		V
Duty-Cycle Adjustment Range	dc	-2.3V ≤ VDADJ ≤ 2.3V	15		85	%
DADJ Nonlinearity	dc/VFADJ	-2V ≤ VDADJ ≤ 2V		2	4	%
Change in Output Frequency	Fo/VDADJ	-2V ≤ VDADJ ≤ 2V		±2.5	±8	%
with DADJ
Maximum DADJ Modulating	FDC			2		MHz
Frequency
FREQUENCY ADJUSTMENT (FADJ)
FADJ Input Current	IFADJ		190	250	320	µA
FADJ Voltage Range	VFADJ			±2.4		V
Frequency Sweep Range	Fo	-2.4V ≤ VFADJ ≤ 2.4V		±70		%
FM Nonlinearity with FADJ	Fo/VFADJ	-2V ≤ VFADJ ≤ 2V		±0.2		%
Change in Duty Cycle with FADJ	dc/VFADJ	-2V ≤ VFADJ ≤ 2V		±2		%
Maximum FADJ Modulating	FF			2		MHz
Frequency
VOLTAGE REFERENCE
Output Voltage	VREF	IREF = 0	2.48	2.50	2.52	V
Temperature Coefficient	VREF/°C			20		ppm/°C
Load Regulation	VREF/IREF	0mA ≤ IREF ≤ 4mA (source)		1	2	mV/mA
		-100µA ≤ IREF ≤ 0µA (sink)		1	4
Line Regulation	VREF/V+	4.75V ≤ V+ ≤ 5.25V (Note 2)		1	2	mV/V
LOGIC INPUTS (A0, A1, PDI)
Input Low Voltage	VIL				0.8	V
Input High Voltage	VIH		2.4			V
Input Current (A0, A1)	IIL, IIH	VA0, VA1 = VIL, VIH			±5	µA
Input Current (PDI)	IIL, IIH	VPDI = VIL, VIH			±25	µA
POWER SUPPLY
Positive Supply Voltage	V+		4.75		5.25	V
SYNC Supply Voltage	DV+		4.75		5.25	V
Negative Supply Voltage	V-		-4.75		-5.25	V
Positive Supply Current	I+			35	45	mA
SYNC Supply Current	IDV+			1	2	mA
Negative Supply Current	I-			45	55	mA

Note 1: Guaranteed by duty-cycle test on square wave.

Note 2: VREF is independent of V-.

MAX038

_______________________________________________________________________________________ 3

High-Frequency Waveform Generator

MAX038

__________________________________________Typical Operating Characteristics

(Circuit of Figure 1, V+ = DV+ = 5V, V- = -5V, VDADJ = VFADJ = VPDI = VPDO = 0V, RL = 1kΩ , CL = 20pF, TA = +25°C, unless otherwise noted.)

100M

		10M
		1M
	(Hz)	100k
	FREQUENCY
		10k
	OUTPUT	1k
		100

10

1

0.1

OUTPUT FREQUENCY vs. IIN CURRENT

08-MAX038 33pF

100pF

330pF

3.3nF

33nF

100nF

1μF

3.3μF

10μF

47μF

100μF

1

10

100

1000

IIN CURRENT (μA)

NORMALIZED OUTPUT FREQUENCY vs. FADJ VOLTAGE

	2.0												09
	1.8												MAX038-
					IIN = 100μA, COSC = 1000pF
	1.6
NORMALIZED	1.4
	1.2
	1.0
OUT	0.8
	0.6
F
	0.4
	0.2
	0
	-3		-2		-1		0		1	2		3
							VFADJ (V)

DUTY CYCLE vs. DADJ VOLTAGE

	100													-16B
	90													MAX038
	80
(%)	70
	60
CYCLE
	50
DUTY
	40
	30
	20
	10
									IIN = 200μA
	0
			-2		-1		0		1				3
	-3										2
							DADJ (V)

NORMALIZED OUTPUT FREQUENCY vs. DADJ VOLTAGE

	1.10		17
			-
FREQUENCY		IIN = 10μA	MAX038
	1.05	IIN = 25μA
		IIN = 50μA
	1.00
OUTPUT
	0.95
NORMALIZED		IIN = 100μA
	0.90	IIN = 250μA
		IIN = 500μA
	0.85

DADJ (V)

DUTY-CYCLE LINEARITY ERROR (%)

2.0

1.5

1.0

0.5

0 -0.5 -1.0 -1.5 -2.0 -2.5

DUTY-CYCLE LINEARITY vs. DADJ VOLTAGE

			18-
	IIN = 500μA
			MAX038

				IIN = 250μA
				IIN = 100μA
		IIN = 50μA
		IIN = 25μA
	IIN = 10μA
-2.0	-1.0	0	1.0	1.5	2.5
		DADJ (V)

4 _______________________________________________________________________________________

High-Frequency Waveform Generator

____________________________Typical Operating Characteristics (continued)

(Circuit of Figure 1, V+ = DV+ = 5V, V- = -5V, VDADJ = VFADJ = VPDI = VPDO = 0V, RL = 1kΩ , CL = 20pF, TA = +25°C, unless otherwise noted.)

SINE-WAVE OUTPUT (50Hz)

SINE-WAVE OUTPUT (20MHz)

MAX038

TOP: OUTPUT 50Hz = Fo

BOTTOM: SYNC

IIN = 50μA

CF = 1μF

TRIANGLE-WAVE OUTPUT (50Hz)

IIN = 400μA

CF = 20pF

TRIANGLE-WAVE OUTPUT (20MHz)

TOP: OUTPUT 50Hz = Fo

BOTTOM: SYNC

IIN = 50μA

CF = 1μF

IIN = 400μA

CF = 20pF

SQUARE-WAVE OUTPUT (50Hz)

TOP: OUTPUT 50Hz = Fo

BOTTOM: SYNC

IIN = 50μA

CF = 1μF

_______________________________________________________________________________________ 5