MAX31091AUA/V+T330 [MAXIM]
Automotive Temperature Range Spread-Spectrum EconOscillatorâ¢;
| 型号： | MAX31091AUA/V+T330 |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Automotive Temperature Range Spread-Spectrum EconOscillator⢠|
| 文件： | 总8页 (文件大小：497K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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MAX31091
Automotive Temperature Range
Spread-Spectrum EconOscillator™
General Description
Benefits and Features
● Spread-Spectrum Clock Output from 200kHz to
The MAX31091 is a low-cost clock generator that is
factory trimmed to output frequencies from 200kHz to
66.6MHz with a nominal accuracy of ±0.25%. The device
can also produce a center-spread-spectrum output with
pin-selectable dither magnitude and rate. Assembled in
66.6MHz
● -40°C to +125°C Operating Temperature Range
● ±1.75% Accuracy Across Temperature
● Factory Trimmed
®
an 8-pin μMAX package, the MAX31091 is designed
to operate with a 3.0V to 3.6V power supply over the
automotive temperature range (-40°C to +125°C).
● Center-Dithered Spread-Spectrum Output
● Pin-Selectable Center-Dither Magnitude of 0%, ±1%,
±2%, or ±4%
Applications
● Pin-Selectable Dither Rate
● 3.0V to 3.6V Supply Operation
● Lead(Pb)-Free, 8-Pin μMAX Package
● AEC-Q100 Qualified
●
●
●
●
●
Automotive Infotainment
Navigation
Advanced Driver Assistance System (ADAS)
Engine Control Unit (ECU) Instrumentation
Automotive
Custom Frequency Options
Contact factory for available custom frequency options.
Typical Operating Circuit
V
CC
Ordering Information appears at end of data sheet.
f
OUT
DR
OUT
8
7
1
2
V
CC
N.C.
V
CC
DECOUPLING
CAPACITORS
MAX31091
GND
N.C.
V
CC
3
4
6
5
SEL0
SEL1
EconOscillator is a trademark and µMAX is a registered trademark of Maxim Integrated Products, Inc.
19-7303; Rev 2; 11/18
MAX31091
Automotive Temperature Range
Spread-Spectrum EconOscillator™
Absolute Maximum Ratings
Voltage Range on V
Voltage Range on DR, SEL0, SEL1
Relative to Ground...............................-0.5V to (V
Continuous Power Dissipation (T = +70°C)
Relative to Ground .........-0.5V to +4.0V
Operating Temperature Range......................... -40°C to +125°C
Storage Temperature Range............................ -55°C to +125°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow).......................................+260°C
CC
+ 0.5V)*
CC
A
µMAX (derate 4.8mW/°C above +70°C) .....................390mW
*This voltage must not exceed 4.0V.
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.
Package Information
8 μMAX
PACKAGE CODE
U8+4
Outline Number
21-0036
90-0092
Land Pattern Number
Thermal Resistance, Multi-Layer Board:
Junction to Ambient (θ
)
206°C/W
42°C/W
JA
Junction to Case (θ
)
JC
For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”,
“#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing
pertains to the package regardless of RoHS status.
Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board.
For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial.
Maxim Integrated
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MAX31091
Automotive Temperature Range
Spread-Spectrum EconOscillator™
Recommended Operating Conditions
(T = -40°C to +125°C, unless otherwise noted.)
A
PARAMETER
Supply Voltage
SYMBOL
CONDITIONS
MIN
3.0
TYP
MAX
UNITS
V
(Note 1)
3.3
3.6
V
CC
High-Level Input Voltage
(SEL0, SEL1, DR)
0.7 x
V
+
CC
0.3
V
V
V
IH
V
CC
Low-Level Input Voltage
(SEL0, SEL1, DR)
0.3 x
V
V
-0.3
IL
CC
DC Electrical Characteristics
(V
= +3.0V to +3.6V, T = -40°C to +125°C, unless otherwise noted.)
CC
A
PARAMETER
SYMBOL
CONDITIONS
= 3.0V
CC
MIN
TYP
MAX
UNITS
High-Level Output Voltage (OUT)
Low-Level Output Voltage (OUT)
V
I
I
= -4mA, V
= 4mA
2.4
V
V
OH
OH
OL
V
0.4
1
OL
High-Level Input Current
(SEL0, SEL1, DR)
I
V
= 3.6V
µA
IH
CC
Low-Level Input Current
(SEL0, SEL1, DR)
I
V = 0V
IL
-1
µA
IL
Supply Current (Active)
I
(Note 2)
16
mA
CC
AC Electrical Characteristics
(V
= +3.0V to +3.6V, T = -40°C to +125°C, unless otherwise noted.)
CC
A
PARAMETER
SYMBOL
CONDITIONS
MIN
0.200
-0.25
-1.75
-1.2
TYP
MAX
66.6
+0.25
+1.75
+1.2
0.1
UNITS
Output Frequency Range
f
(Note 3)
= 3.3V, T = +25°C
MHz
OUT
V
0
CC
A
Output Center Frequency
Tolerance
∆f
Across T and V = 3.3V
CC
%
OUT
A
0°C to +70°C and V
(Note 4)
= 3.3V
CC
Power-Up Time
t
ms
pF
PU
Load Capacitance
CL
15
50
50
< 33.3MHz (Note 3)
Duty Cycle
%
%
≥ 33.3MHz (Note 3)
40
60
Jitter (RMS), 50MHz
0.3
Note 1: All voltages are referenced to ground. Currents entering the IC are specified positive and currents exiting the IC are negative.
Note 2: Supply current measured with C = 15pF, V
= 3.6V, T = +25°C, f
= 66.6MHz, no dither.
L
CC
A
OUT
Note 3: No dither.
Note 4: Guaranteed by design.
Note 5: For aging characteristics, contact factory.
Maxim Integrated
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MAX31091
Automotive Temperature Range
Spread-Spectrum EconOscillator™
Typical Operating Characteristics (continued)
(V
= 3.3V, T = +25°C, unless otherwise noted.)
CC
A
FREQUENCY VARIATION
vs. VOLTAGE
FREQUENCY VARIATION
vs. TEMPERATURE
SUPPLY CURRENT vs. TEMPERATURE
toc03
toc01
toc02
0.5
0.4
0.3
0.2
0.1
0
10
9.5
9
1.75
1.25
VCC = 3.6V
VCC = 3.3V
NO DITHER
0.75
8.5
8
0.25
VCC = 3.3V
VCC = 3.0V
fOUT = 66MHz
fOUT = 66MHz
-0.25
-0.75
-1.25
-1.75
-0.1
-0.2
-0.3
-0.4
-0.5
fOUT = 200kHz
7.5
7
fOUT= 200kHz
NO DITHER
fOUT = 66MHz
60 110
6.5
3
3.2
3.4
3.6
-40
10
TEMPERATURE (°C)
-40
10
60
110
VCC (V)
TEMPERATURE (°C)
DUTY CYCLE vs. TEMPERATURE
OUTPUT RISE TIME
DUTY CYCLE vs. SUPPLY VOLTAGE
toc05
toc06
toc04
52
51
50
49
48
47
46
45
44
51
3.5
50.5
50
fOUT = 200kHz
3
2.5
2
fOUT = 200kHz
49.5
49
RISE TIME
= 1.02nS
TYPICAL AT
12pF LOAD
48.5
48
fOUT = 66MHz
f
OUT = 66MHz
1.5
1
47.5
47
NO DITHER
NO DITHER
0.5
0
46.5
46
-40
10
60
110
3
3.2
3.4
3.6
TIME (ns)
VCC (V)
TEMPERATURE (°C)
SPECTRUM ATTENUATION vs. FREQUENCY
AT DIFFERNET DITHER AMPLITUDES
toc08
OUTPUT FALL TIME
toc07
5
0
3.5
3
fOUT = 33.3MHz
0%
1%
8dB
-5
RISE TIME
= 1.12nS
TYPICAL
AT 12pF
LOAD
11dB
2%
2.5
2
4%
14dB
-10
-15
-20
-25
-30
-35
1.5
1
RBW = 120kHz
CENTER DITHER
0.5
0
31.9
32.9
33.9
TIME (ns)
FREQUENCY (MHz)
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MAX31091
Automotive Temperature Range
Spread-Spectrum EconOscillator™
Pin Configuration
Pin Description
PIN
1
NAME
OUT
VCC
FUNCTION
Spread-Spectrum Clock Output
Supply Voltage
TOP VIEW
2
ꢀ
3
GND
Ground
OUT
1
2
3
4
8
7
6
5
DR
V
N.C.
N.C.
SEL0
Spread-Spectrum Dither Magnitude
Select Inputs. Selects dither magnitude
(see Table 1).
CC
4
SEL1
MAꢂꢃꢄꢅꢆꢄ
ꢁMAꢂ
GND
5
SEL0
N.C.
SEL1
6, 7
No Connection
Spread-Spectrum Dither Rate Selector.
Selects dither rate (see Table 2).
8
DR
Block Diagram
V
CC
f
MAꢀꢁꢂꢃꢄꢂ
MOSC
FACTORY-PROGRAMMED
MASTER OSCILLATOR
V
CC
f
OUT
f
f
DITHER
MOSC
OUT
TRIANGLE-WAVE GENERATOR
(DITHER %)
GND
DITHER RATE DIVIDER
DR
IS THE MASTER OSCILLATOR FREQUENCY.
SEL1
SEL0
f
MOSC
Maxim Integrated
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MAX31091
Automotive Temperature Range
Spread-Spectrum EconOscillator™
Power-Up
Detailed Description
Upon the application of power, the MAX31091 output is
held in the low state until t has elapsed. This removes
any possibility of erroneous output transitions during initial
power-up.
The MAX31091 clock generator is capable of output
frequencies from 200kHz to 66.6MHz over the full automotive
temperature range (-40°C to +125°C). The device can also
produce a spread-spectrum (dithered) square-wave output
using four pin-selectable dither percentages. The device also
features two selectable dither rates.
PU
Table 1. Dither Magnitude
The MAX31091 is shipped from the factory-programmed
to a customer-specified frequency.
DITHER MAGNITUDE (%)
SEL1
SEL0
LOGIC LEVEL LOGIC LEVEL
MAX31091AUA
Spread Spectrum
0
0
1
1
0
1
0
1
No dither
Q1
The MAX31091 can reduce radiated emission peaks.
The dither percentage is controlled by the state of the
SEL0 and SEL1 pins. The output frequency can be dithered
at 0%, ±1%, ±2%, and ±4%, centered around the
programmed frequency.
Q2
Q4
The two select pins SEL0 and SEL1 provide a means of
selecting the dither magnitudes as follows:
Table 2. Value of n w.r.t. Output Frequency
OUTPUT FREQUENCY f
A triangle-wave generator injects a control signal into the
master oscillator to dither its output. The dither rate is
OUT
n
(MHz)
a function of the output frequency, f
setting of the DR pin (see the equation below). Figure 1
shows a plot of the output frequency vs. time.
, as well as the
OUT
DR = LOGIC DR = LOGIC
f
(min)
f
(max)
OUT
OUT
LEVEL 1
LEVEL 0
0.200
0.260
4
5
5
6
f
OUT
DITHER RATE =
0.261
0.522
1.043
2.084
4.168
8.334
16.668
33.334
0.521
1.042
2.083
4.167
8.333
16.667
33.333
66.667
n
2
6
7
where n is defined in Table 2 as a function of output
frequency. For example, for an output frequency of
27.0MHz, the dither rate would be 13.2kHz for DR = 1 and
6.6kHz for DR = 0.
7
8
8
9
9
10
11
12
13
10
11
12
MAX31091 Frequency Spreading Profile as a Function of Dither %
IF DITHER AMOUNT = 0%
PROGRAMMED f +
OUT
(1%, 2%, OR 4% OF f
)
OUT
DITHER
PROGRAMMED f
PROGRAMMED f
(1%, 2%, OR 4% OF f
AMOUNT
(±1%, ±2%,
OR ±4%)
OUT
-
)
OUT
OUT
1
DITHER FREQ
TIME
Figure 1. Center Dithered
Maxim Integrated
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MAX31091
Automotive Temperature Range
Spread-Spectrum EconOscillator™
Applications Information
Chip Information
SUBSTRATE CONNECTED TO GROUND
Power-Supply Decoupling
To achieve best results, it is highly recommended that
decoupling capacitors are used on the IC power-supply
pins. Typical values of decoupling capacitors are 0.01µF
and 0.1µF. Use a high-quality, ceramic, surface-mount
capacitor, and mount it as close as possible to the V
and GND pins of the IC to minimize lead inductance.
CC
Ordering Information
PART
TEMP RANGE
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
SPREAD SPECTRUM
Center
OUTPUT FREQUENCY (MHz)
PIN-PACKAGE
8 μMAX
8 μMAX
8 μMAX
8 μMAX
8 μMAX
8 μMAX
8 μMAX
8 μMAX
8 μMAX
8 μMAX
8 μMAX
8 μMAX
8 μMAX
8 μMAX
8 μMAX
8 μMAX
MAX31091AUA/V+033
MAX31091AUA/V+T033
MAX31091AUA/V+066
MAX31091AUA/V+T066
MAX31091AUA/V+172
MAX31091AUA/V+T172
MAX31091AUA/V+200
MAX31091AUA/V+T200
MAX31091AUA/V+330
MAX31091AUA/V+T330
MAX31091AUA/V+192
MAX31091AUA/V+T192
MAX31091AUA/V+400
MAX31091AUA/V+T400
MAX31091AUA/V+027
MAX31091AUA/V+T027
33.3
33.3
66.6
66.6
1.7
Center
Center
Center
Center
Center
1.7
Center
0.20
0.20
33.0
33.0
1.9
Center
Center
Center
Center
Center
1.9
Center
0.4
Center
0.4
Center
27
Center
27
/V denotes an automotive qualified part.
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
Package Information
For the latest package outline information and land patterns (foot-
prints), go to www.maximintegrated.com/packages. Note that
a “+”, “#”, or “-” in the package code indicates RoHS status only.
Package drawings may show a different suffix character, but the
drawing pertains to the package regardless of RoHS status.
PACKAGE
TYPE
PACKAGE
CODE
OUTLINE
LAND
PATTERN NO.
NO.
8 µMAX
U8+4
21-0036
90-0092
Maxim Integrated
│ 7
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MAX31091
Automotive Temperature Range
Spread-Spectrum EconOscillator™
Revision History
REVISION REVISION
PAGES
CHANGED
DESCRIPTION
NUMBER
DATE
0
3/14
Initial release
—
Added AEC-Q100 statement to Benefits and Features section, updated General Description
and updated Ordering Information table
1
2
9/17
1, 7
Updated Applications, Absolute Maximum Ratings, and Ordering Information, added
Package Information section
11/18
1, 2, 7
For pricing, delivery, and ordering information, please visit Maxim Integrated’s online storefront at https://www.maximintegrated.com/en/storefront/storefront.html.
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses
are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits)
shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
©
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
2018 Maxim Integrated Products, Inc.
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