- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄9569 > MAX3676EHJ (Maxim Integrated Products)IC RECOV/RETIME 622MBPS 32-TQFP PDF資料下載
參數(shù)資料
| 型號： | MAX3676EHJ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 3/15頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC RECOV/RETIME 622MBPS 32-TQFP |
| 產(chǎn)品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 360 |
| 類型： | 時鐘和數(shù)據(jù)恢復（CDR），多路復用器 |
| PLL： | 是 |
| 主要目的： | SONET/SDH |
| 輸入： | PECL |
| 輸出： | PECL |
| 電路數(shù)： | 1 |
| 比率 - 輸入:輸出： | 2:2 |
| 差分 - 輸入:輸出： | 是/是 |
| 頻率 - 最大： | 622.08MHz |
| 電源電壓： | 3 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 32-TQFP |
| 供應商設備封裝： | 32-TQFP（5x5） |
| 包裝： | 托盤 |
MAX3676
622Mbps, 3.3V Clock-Recovery and
Data-Retiming IC with Limiting Amplifier
______________________________________________________________________________________
11
Reduced Power Consumption
Without the Limiting Amplifier
The limiting amplifier is biased independently from the
clock recovery circuitry. Grounding INSEL turns off the
limiting amplifier and selects the PECL DDI inputs.
Converting Average Optical Power
to Signal Amplitude
Many of the MAX3676’s specifications relate to input-
signal amplitude. When working with fiber optic
receivers, the input is usually expressed in terms of
average optical power and extinction ratio. The rela-
tions given in Table 2 and Figure 6 are helpful for con-
verting optical power to input signal when designing
with the MAX3676.
In an optical receiver, the input voltage to the limiting
amplifier can be found by multiplying the relationship in
Table 2 by the photodiode responsivity and transim-
pedance amplifier gain.
Optical Hysteresis
Power and hysteresis are often expressed in decibels.
By definition, decibels are always 10log (power). At the
inputs to the MAX3676 limiting amplifier, the power is
VIN2/R. If a receiver’s optical input power (x) increases
by a factor of two, and the preamplifier is linear, then the
voltage at the input to the MAX3676 also increases by a
factor of two.
The optical power increase is:
10log(2x/x) = 10log(2) = +3dB
At the MAX3676, the voltage increase is:
In an optical receiver, the decibel change at the
MAX3676 always equals 2x the optical decibel change.
The MAX3676’s typical voltage hysteresis is 3.0dB. This
provides an optical hysteresis of 1.5dB.
Jitter in Optical Receivers
Timing jitter, edge speeds, aberrations, optical disper-
sion, and attenuation all impact the performance of
high-speed clock recovery for SDH/SONET receivers
(Figure 7). These effects decrease the time available
for error-free data recovery by reducing the received
“eye opening” of nonreturn-to-zero (NRZ) transmitted
signals.
10
2
20
2
log
log(
)
log(
2V
/ R
V/ R
=
IN
()
=
))
=+6dB
TIME
P0
P1
PAVE
Figure 6. Optical Power Relations
Table 2. Optical-Power Relations*
*Assuming a 50% average input-data duty cycle.
SYMBOL
RELATION
Average
Power
PAVG
Extinction
Ratio
re
PARAMETER
Optical Power
of a “1”
P1
Optical Power
of a “0”
P0
Signal
Amplitude
PIN
P
= P0 + P1 / 2
AVG
()
r =
1 / P0
e
P
PP
r
AVG
e
12
1
=
+
P0
2P
/ r
1
AVG
e
=+
()
PP
P
r
IN
AVG
e
=
()
+
10
2
1
AMPLITUDE
EYE DIAGRAM WITH NO TIMING JITTER
EFFECTS OF TIMING JITTER ON EYE DIAGRAM
TIME
MIDPOINT
TIME
MIDPOINT
Figure 7. Eye Diagram With and Without Timing Jitter
相關PDF資料 |
PDF描述 |
|---|---|
| MS3450W16-10PW | CONN RCPT 3POS WALL MNT W/PINS |
| MS27467T25F19SB | CONN PLUG 19POS STRAIGHT W/SCKT |
| GTC030-32-1P | CONN RCPT 5POS PANEL MNT W/PINS |
| MS27467E25F19SC | CONN PLUG 19POS STRAIGHT W/SCKT |
| MS27473E16F35SA | CONN PLUG 55POS STRAIGHT W/SCKT |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX3676EHJ+ | 功能描述:時鐘發(fā)生器及支持產(chǎn)品 622Mbps 3.3V Clock Recovery RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-56 |
| MAX3676EHJ+T | 功能描述:時鐘發(fā)生器及支持產(chǎn)品 622Mbps 3.3V Clock Recovery RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-56 |
| MAX3676EHJ-T | 功能描述:時鐘發(fā)生器及支持產(chǎn)品 622Mbps 3.3V Clock Recovery RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-56 |
| MAX3677CTJ+ | 制造商:Microsemi Corporation 功能描述:+3.3V, LOW-JITTER CLOCK GEN W/MULT OUT - Trays 制造商:Microsemi Corporation 功能描述:Microsemi MAX3677CTJ+ Clocks - Timers 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC CLOCK GENERATOR PROGR 32TQFN 制造商:Microsemi Corporation 功能描述:IC CLOCK GENERATOR PROGR 32TQFN |
| MAX3677CTJ+T | 制造商:Microsemi Corporation 功能描述:+3.3V, LOW-JITTER CLOCK GEN W/MULT OUT - Tape and Reel |
發(fā)布緊急采購，3分鐘左右您將得到回復。