PulseCore ASM3P2590A Low power peak emi reducing solution Datasheet

ASM3P2590A
September 2006
rev 0.4
Low Power Peak EMI Reducing Solution
Features
•
The ASM3P2590A uses the most efficient and optimized
modulation profile approved by the FCC and is
Generates a 1X low EMI optimized clock signal at the
implemented by using a proprietary all digital method.
output.
•
Integrated loop filter components.
•
Operates with a 3.3 / 2.5V Supply.
•
Operating current less than 5mA.
•
Low power CMOS design.
•
Input frequency range
The ASM3P2590A modulates the output of a single PLL
in order to “spread” the bandwidth of a synthesized clock,
and more importantly, decreases the peak amplitudes of
its harmonics. This results in significantly lower system
EMI compared to the typical narrow band signal produced
60MHz to 120MHz for 2.5V
by oscillators and most frequency generators. Lowering
60MHz to 120MHz for 3.3V
EMI by increasing a signal’s bandwidth is called ‘spread
• Frequency deviation: ±0.75% (Typ) @85MHz Output
spectrum clock generation’.
frequency.
•
Available in 6-pin TSOT-23 Package.
Applications
Product Description
The ASM3P2590A is targeted towards all portable
devices with very low power requirements like MP3
The ASM3P2590A is a versatile spread spectrum
frequency modulator designed specifically for a wide
range of clock frequencies. The ASM3P2590A reduces
electromagnetic interference (EMI) at the clock source,
allowing system wide reduction of EMI of
all clock
dependent signals. The ASM3P2590A allows significant
players,MFP, LCD Panel Module and digital still cameras.
Key Specifications
Description
Specification
system cost savings by reducing the number of circuit
Supply voltages
VDD = 3.3V / 2.5V
board layers ferrite beads, shielding that are traditionally
Cycle-to-Cycle Jitter
360pS (Typ)
required to pass EMI regulations.
Output Duty Cycle
45/55%
Modulation Rate Equation
FIN/2560
±0.75% (Typ) @85MHz
Output
Frequency Deviation
Block Diagram
VDD
SSON
PLL
Modulation
CLKIN
Frequency
Divider
Feedback
Divider
Phase
Detector
Loop
Filter
VCO
Output
Divider
VSS
PulseCore Semiconductor Corporation
1715 S. Bascom Ave Suite 200 Campbell, CA 95008 • Tel: 408-879-9077 • Fax: 408-879-9018
www.pulsecoresemi.com
Notice: The information in this document is subject to change without notice.
ModOUT
ASM3P2590A
September 2006
rev 0.4
Pin Configuration (6-pin TSOT- 23 Package)
SSON
1
NC
2
ASM3P2590A
CLKIN 3
6
VSS
5
ModOUT
4
VDD
Pin Description
Pin#
Pin Name
Type
Description
1
SSON
I
When SSON is HIGH, the spread spectrum is enabled and when LOW, it turns off the
spread spectrum. Connect the pin to ground When Spread Spectrum feature is not
required.
2
NC
-
No Connect
3
CLKIN
I
Clock Input
4
VDD
P
Power supply for the entire chip.
5
ModOUT
O
Spread spectrum clock output.
6
VSS
P
Ground connection.
Modulation Profile
Specifications
Description
Frequency Range
Specification
For 2.5V Supply
For 3.3V Supply
60MHz < CLKIN < 120MHz
60MHz < CLKIN < 120MHz
Modulation Equation
FIN/2560
Frequency Deviation
±0.75% (Typ) @ 85MHz Output
Low Power Peak EMI Reducing Solution
Notice: The information in this document is subject to change without notice.
2 of 7
ASM3P2590A
September 2006
rev 0.4
Absolute Maximum Ratings
Symbol
Parameter
VDD, VIN
Rating
Unit
Voltage on any pin with respect to Ground
-0.5 to +4.6
V
Storage temperature
-65 to +125
°C
TA
Operating temperature
-40 to +85
°C
Ts
Max. Soldering Temperature (10 sec)
260
°C
TJ
Junction Temperature
150
°C
2
KV
TSTG
Static Discharge Voltage
TDV
(As per JEDEC STD22- A114-B)
Note: These are stress ratings only and are not implied for functional use. Exposure to absolute maximum ratings for prolonged periods of time may affect
device reliability.
DC Electrical Characteristics for 2.5V Supply
Symbol
Parameter
Min
Typ
Max
Unit
V
VIL
Input low voltage
VSS - 0.3
–
0.8
VIH
Input high voltage
2.0
–
VDD + 0.3
V
IIL
Input low current
–
–
-35
µA
IIH
Input high current
–
–
35
µA
Output low voltage (VDD = 2.5V, IOL = 8 mA)
–
–
0.6
V
VOH
Output high voltage (VDD = 2.5V, IOH = 8 mA)
1.8
–
–
V
IDD
Static supply current*
–
1.8
–
mA
mA
VOL
ICC
Dynamic supply current (2.5V, 85MHz and no load)
VDD
tON
ZOUT
–
4.0
–
2.375
2.5
2.625
V
Power-up time (first locked cycle after power-up)
–
–
5
mS
Output impedance
–
50
–
Ω
Min
Typ
Max
Unit
Input frequency
60
–
120
MHz
Output frequency
60
–
120
MHz
Operating voltage
* CLKIN pin is pulled low
AC Electrical Characteristics for 2.5V Supply
Symbol
CLKIN
ModOUT
fd
Parameter
Frequency Deviation
Input Frequency = 60MHz
–
±0.85
–
Input Frequency = 120MHz
–
±0.60
–
%
tLH*
Output rise time (measured from 0.7V to 1.7V)
0.7
1.8
2.6
nS
tHL*
Output fall time (measured from 1.7V to 0.7V)
0.4
0.9
1.1
nS
tJC
Jitter (Cycle to cycle)
–
360
–
pS
tD
Output duty cycle
45
50
55
%
* tLH and tHL are measured into a capacitive load of 15pF
Low Power Peak EMI Reducing Solution
Notice: The information in this document is subject to change without notice.
3 of 7
ASM3P2590A
September 2006
rev 0.4
DC Electrical Characteristics for 3.3V Supply
Symbol
Min
Typ
Max
Unit
VIL
Input low voltage
VSS - 0.3
–
0.8
V
VIH
Input high voltage
2.0
–
VDD + 0.3
V
IIL
Input low current
–
–
-35
µA
IIH
Parameter
Input high current
–
–
35
µA
VOL
Output low voltage (VDD = 3.3V, IOL = 8 mA)
–
–
0.4
V
VOH
Output high voltage (VDD = 3.3V, IOH = 8 mA)
2.5
–
–
V
IDD
Static supply current*
–
2.2
–
mA
ICC
Dynamic supply current (3.3V, 85MHz and no load)
–
4.5
–
mA
VDD
Operating voltage
tON
ZOUT
3.0
3.3
3.6
V
Power-up time (first locked cycle after power-up)
–
–
5
mS
Output impedance
–
45
–
Ω
* CLKIN pin is pulled low
AC Electrical Characteristics for 3.3V Supply
Symbol
CLKIN
ModOUT
fd
Parameter
Min
Typ
Max
Unit
Input frequency
60
–
120
MHz
Output frequency
60
–
120
MHz
Input Frequency = 60MHz
–
±0.85
–
Input Frequency = 120MHz
–
±0.60
–
Frequency Deviation
%
tLH*
Output rise time (measured from 0.8 to 2.0V)
0.5
1.2
1.8
nS
tHL *
Output fall time (measured at 2.0V to 0.8V)
0.3
0.8
1.1
nS
tJC
Jitter (cycle to cycle)
–
360
–
pS
tD
Output duty cycle
45
50
55
%
*tLH and tHL are measured into a capacitive load of 15pF
Low Power Peak EMI Reducing Solution
Notice: The information in this document is subject to change without notice.
4 of 7
ASM3P2590A
September 2006
rev 0.4
Package Information
6-pin TSOT-23 Package
Dimensions
Symbol
Inches
Min
A
Max
Millimeters
Min
Max
0.04
1.00
A1
0.00
0.004
0.00
0.10
A2
0.033
0.036
0.84
0.90
b
0.012
0.02
0.30
0.50
H
0.005 BSC
0.127 BSC
D
0.114 BSC
2.90 BSC
B
0.06 BSC
1.60 BSC
e
0.0374 BSC
0.950 BSC
C
0.11 BSC
2.80 BSC
L
0.0118
0.02
0.30
0.50
θ
0°
4°
0°
4°
Low Power Peak EMI Reducing Solution
Notice: The information in this document is subject to change without notice.
5 of 7
ASM3P2590A
September 2006
rev 0.4
Ordering Information
Part Number
Marking
Package Type
Temperature
ASM3P2590AF-06-OR
Y4
6-Pin TSOT-23, TAPE & REEL, Pb Free
Commercial
ASM3P2590AG-06-OR
Y3
6-Pin TSOT-23, TAPE & REEL, Green
Commercial
ASM3I2590AF-06-OR
Y5
6-Pin TSOT-23, TAPE & REEL, Pb Free
Industrial
ASM3I2590AG-06-OR
Y6
6-Pin TSOT-23, TAPE & REEL, Green
Industrial
Device Ordering Information
A S M 3 P 2 5 9 0 A G - 0 6 - 0 R
R = Tape & Reel, T = Tube or Tray
O = TSOT23
S = SOIC
T = TSSOP
A = SSOP
V = TVSOP
B = BGA
Q = QFN
U = MSOP
E = TQFP
L = LQFP
U = MSOP
P = PDIP
D = QSOP
X = SC-70
J=TSOT26
DEVICE PIN COUNT
F = LEAD FREE AND RoHS COMPLIANT PART
G = GREEN PACKAGE, LEAD FREE, and RoHS
PART NUMBER
X= Automotive
I= Industrial
P or n/c = Commercial
(-40C to +125C) (-40C to +85C)
(0C to +70C)
1 = Reserved
2 = Non PLL based
3 = EMI Reduction
4 = DDR support products
5 = STD Zero Delay Buffer
6 = Power Management
7 = Power Management
8 = Power Management
9 = Hi Performance
0 = Reserved
PulseCore Semiconductor Mixed Signal Product
Licensed under U.S Patent Nos 5,488,627 and 5,631,921
Low Power Peak EMI Reducing Solution
Notice: The information in this document is subject to change without notice.
6 of 7
ASM3P2590A
September 2006
rev 0.4
PulseCore Semiconductor Corporation
1715 S. Bascom Ave Suite 200
Campbell, CA 95008
Tel: 408-879-9077
Fax: 408-879-9018
www.pulsecoresemi.com
Copyright © PulseCore Semiconductor
All Rights Reserved
Part Number: ASM3P2590A
Document Version: 0.4
Note: This product utilizes US Patent # 6,646,463 Impedance Emulator Patent issued to PulseCore Semiconductor, dated 11-11-2003
© Copyright 2006 PulseCore Semiconductor Corporation. All rights reserved. Our logo and name are trademarks or registered
trademarks of PulseCore Semiconductor. All other brand and product names may be the trademarks of their respective
companies. PulseCore reserves the right to make changes to this document and its products at any time without notice.
PulseCore assumes no responsibility for any errors that may appear in this document. The data contained herein represents
PulseCore’s best data and/or estimates at the time of issuance. PulseCore reserves the right to change or correct this data at
any time, without notice. If the product described herein is under development, significant changes to these specifications are
possible. The information in this product data sheet is intended to be general descriptive information for potential customers
and users, and is not intended to operate as, or provide, any guarantee or warrantee to any user or customer. PulseCore does
not assume any responsibility or liability arising out of the application or use of any product described herein, and disclaims
any express or implied warranties related to the sale and/or use of PulseCore products including liability or warranties related
to fitness for a particular purpose, merchantability, or infringement of any intellectual property rights, except as express agreed
to in PulseCore’s Terms and Conditions of Sale (which are available from PulseCore). All sales of PulseCore products are
made exclusively according to PulseCore’s Terms and Conditions of Sale. The purchase of products from PulseCore does not
convey a license under any patent rights, copyrights; mask works rights, trademarks, or any other intellectual property rights of
PulseCore or third parties. PulseCore does not authorize its products for use as critical components in life-supporting systems
where a malfunction or failure may reasonably be expected to result in significant injury to the user, and the inclusion of
PulseCore products in such life-supporting systems implies that the manufacturer assumes all risk of such use and agrees to
indemnify PulseCore against all claims arising from such use.
Low Power Peak EMI Reducing Solution
Notice: The information in this document is subject to change without notice.
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