+ ] ù ; | 1 k 4 10 - maxim integrated3117 d $ Þ ] 2/6& È 3117 d $ Þ 29/6& Þ j å ù | w ¡ } ò...
TRANSCRIPT
-
2
3
10
14
18
COMPARATOR A
SW1
VDD
OUT-
SW2
VDD
CON
OUT+
LE
RE
RON
COMPARATOR B
-
“
”
©
http://www.maxim-ic.com.cn/NewsBrief
-
“ ”
3
RL
GATE-DRIVEAMPLIFIER
TRIANGLE-WAVEOSCILLATOR
GND
COUT
t
VO(t)
VDD VDD
VO_AVGCF
VL
LF
VAUDIO+
-
++
-
-
-
4
|A| A OFFON =
0(0)I)(TI(t)dtVL
1LSWL
T
0
L
SW
=-=∫
∫= (t)dtVL1
(t)I LL
TSW
VDDVO
GND
NOTE: FOR CLARITY, SIGNAL PERIODS ARE NOT SHOWN TO SCALE.
INPUTSIGNAL
TRIANGLE-WAVEOSCILLATOR SIGNAL
-
5
Σ ΔVDD
AOFFAOFF
AON
AON = - (VDD - VO) x tONAOFF = - VO x tOFFS
AL (t)
VDD - VO
VO (t)
- VO
IL (t)
tON
AON
tOFF
IAVG
TSW
t
t
t
VIN (s)
En (s)
En (s) = NOISE DUE TO PWM NONLINEARITIES, OUTPUT-STAGE NONLINEARITIES, AND SUPPLY DEVIATIONS
+
+
+
-
1
s
FEEDBACKNETWORK
PWMSIGNAL-TRANSFER
FUNCTIONNOISE-TRANSFER
FUNCTION
OUTPUT LPFRESPONSE
SHAPED NOISE
f
POW
ER S
PECT
RAL
DENS
ITY
= 1
(s)Es1
s(s)V
s11
(s)V nINO ++×
+=
-
—
Ω
Ω
—
6
-
7
OFF
OUT-
ON
RSPKR LFLF
IL
VDD
OUT+
ON
OFFPWMOUTPUTCF CF
ON
OUT-
OFF
RSPKR LFLF
IL
VDD
OUT+
OFF
ONPWMOUTPUT CF CF
OUT+
OUT-
DIFFERENTIAL OUTPUT(OUT+ - OUT-)
VDD
VDD
VDD
-VDD
GND
GND
2 x VDD
-
8
COMPARATOR A
SW1
VDD
OUT-
SW2
VDD
CON
OUT+
LE
RE
RON
COMPARATOR B
VIN-
VIN+
-VDD
VDD
VDD
VDD
VOUT+ - VOUT-
TSW
OUT-
OUT+ t ON(
MIN
)
0V
GND
GND
-
9
*
±
*
20
-801M 10M 100M 1G
-60
FREQUENCY (Hz)
OUTP
UT M
AGNI
TUDE
(dBV
)
-40
-20
0
-10
-30
-50
-70
10RBW = 10kHzMEASURED BETWEEN OUT+ OROUT- AND GROUND
20
-801M 10M 100M 1G
-60
FREQUENCY (Hz)
OUTP
UT M
AGNI
TUDE
(dBV
)
-40
-20
0
-10
-30
-50
-70
10RBW = 10kHzMEASURED BETWEEN OUT+ OROUT- AND GROUND
-
10
—
“ ”
—
® ®
-
11
—
®
•
•
•
•
DS3600
SPI™ BUS
HIGH
-SPE
ED C
LEAR
DEVICEREGISTERS
64-BYTEENCRYPTION-
KEY SRAM
TEMP SENSOR
RTC OSCILLATOR
TAMPERCOMPARATORS
POR AND BATTERYCONTROL
SYSTEMPROCESSOR
EXTERNALSRAM
RESI
STIV
E M
ESH
TAM
PER
SENS
OR
SYST
EM V
OLTA
GE
-
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
—
•
•
•
•
•
“ ”
•
•
•
•
•
12
-
13
-
14
μ
μ
W
CS
•
• μ
• “ ” “ ”
•
μ
•
• μ μ
•
•
®
( )
1-Wire,LIN bus,
SensorPath
RS-485, LVDS,CAN, USB 2.0,
FireWire®
I2C, SMBus™SPI™,
MICROWIRE™
-
15
“ ”
μ μ μ
μ μ
“ ”
-
CS
16
-
17
®
“ ”
“
”
“ ”
“ ”
“ ”
“ ”
“ ”
“ ”
“”
“ ”
“ ”
“ ”
“ ”
“ ”
“ ’”
’ “ ”
“”
“”
“ ”
“ — ”
“ ®
”
http://www.interbusclub.com/http://www.m-bus.com/http://www.maxim-ic.com.cn/AN1796http://www.lin-subbus.org/http://www.national.com/nationaledge/jan04/article.htmlhttp://www.maxim-ic.com.cn/AN244http://www.maxim-ic.com.cn/AN244http://www.maxim-ic.com.cn/AN148http://www.maxim-ic.com.cn/AN155http://www.maxim-ic.com.cn/AN155http://www.maxim-ic.com.cn/AN3829http://www.maxim-ic.com.cn/AN178http://www.maxim-ic.com.cn/AN186http://www.maxim-ic.com.cn/AN3675http://www.maxim-ic.com.cn/AN3826http://www.maxim-ic.com.cn/AN3826http://www.nxp.com/acrobat_download/literature/9398/39340011.pdfhttp://www.nxp.com/acrobat_download/literature/9398/39340011.pdfhttp://www.smbus.org/specs/http://www.freescale.com/files/microcontrollers/doc/data_sheet/M68HC11E.pdfhttp://www.freescale.com/files/microcontrollers/doc/data_sheet/M68HC11E.pdfhttp://www.national.com/an/AN/AN-452.pdfhttp://www.ausairpower.net/OSR-0201.htmlhttp://www.usb.org/developers/docshttp://www.national.com/appinfo/lvds/files/ownersmanual.pdfhttp://www.lammertbies.nl/comm/info/RS-485.htmlhttp://www.semiconductors.bosch.de/pdf/can2spec.pdfhttp://www.can-cia.org/downloads/ciaspecifications/?269pdfserv.maxim-ic.com/cn/ej/DallasEJ2.pdfpdfserv.maxim-ic.com/cn/ej/DallasEJ2.pdf
-
18
“ ”
“ ”
1-WireDEVICE
VCC
R
PIO
1-Wire HOST(µC)
1-WireDEVICE
GNDTXD
RXD
PARASITEPOWERSUPPLY
INTERFACECONTROL
64-BIT ID
DEVICEFUNCTION
INTERNAL VDD
1-WIRE
PORTCONTROL
PIO PIN
-
“ ”
19
WRITE 0 WRITE 1 READ 1
MS: MASTER SAMPLESS: SLAVE SAMPLE
MASTER-INITIATEDREAD/WRITE TIME SLOTS
MS
READ 0
MSSS
SS
http://www.maxim-ic.com.cn/1-Wire