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參數(shù)資料
| 型號(hào)： | MAX3877 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Half-Duplex LVDM Transceiver 8-SOIC -40 to 85 |
| 中文描述： | 2.5Gbps、+3.3V時(shí)鐘與數(shù)據(jù)再定時(shí)IC，帶有垂直調(diào)節(jié)閾值 |
| 文件頁數(shù)： | 9/16頁 |
| 文件大?。?/td> | 550K |
| 代理商： | MAX3877 |
M
2.5Gbps, +3.3V Clock and Data Retiming ICs
with Vertical Threshold Adjust
_______________________________________________________________________________________
9
Detailed Description
The MAX3877/MAX3878 consist of a fully integrated
phase-locked loop (PLL), input amplifier, data retiming
block, and CML output buffer (MAX3877) or PECL out-
put buffer (MAX3878). The PLL consists of a phase/fre-
quency detector (PFD), a loop filter, and a
voltage-controlled oscillator (VCO). Figure 5 shows the
functional diagram.
This device is designed to deliver the best combination
of jitter performance and power dissipation by using a
fully differential signal architecture and low-noise
design techniques.
SDI Input Amplifier
The SDI input amplifier accepts 2.488Gbps NRZ data
with differential input swing from 10mVp-p up to
1200mVp-p. The bit error rate is better than 1
10
-10
for
input signals as small as 4mVp-p, though the jitter toler-
ance performance will be degraded. This amplifier
allows for adjustment of the input threshold level. For
interfacing with PECL signal levels, see
Applications
Information
, or refer to Applications Note HFAN 1.0,
Interfacing Between CML, PECL, and LVDS.
SLBI Input Amplifier
The SLBI input amplifier accepts either 2.488Gbps
loopback data or a 155MHz reference clock. This
amplifier accepts data with differential input swing from
50mVp-p up to 1200mVp-p. For interfacing with PECL
signal levels, see
Applications Information.
Phase/Frequency Detector
The phase detector incorporated in the MAX3877 and
MAX3878 produces a voltage proportional to the phase
difference between the incoming data and the internal
clock. Because of its feedback nature, the PLL drives
the error voltage to zero, aligning the recovered clock
to the center of the incoming data eye for retiming.
The digital frequency detector (FD) aids frequency
acquisition during startup conditions. The frequency
difference between the received data and the VCO
clock is derived by sampling the in-phase and quadra-
ture VCO output on the rising edges of the data input
signal. The FD drives the VCO until the frequency dif-
ference is reduced to zero. Once frequency acquisition
is complete, the FD returns to a neutral state. False
locking is completely eliminated by this digital frequen-
cy detector.
While in holdover mode, a Type 4 phase/frequency
detector (PFD) is implemented to track the 155MHz ref-
erence clock signal. This PFD compares the incoming
155MHz reference clock with the divided down VCO
clock. The LREF input is used to enable holdover mode
(see
Applications Information
).
Figure 5. Functional Diagram
SDI-
V
CC
V
CC
THADJ
SDI+
SLBI-
SLBI+
SCLKO-
PHADJ
SCLKO+
SDO+
SDO-
DC-OFFSET/
PWD
CANCELLATION
CPWD-
FIL+
FIL-
LOSS OF
SIGNAL
DETECTOR
PHASE &
FREQUENCY
DETECTOR
THRESHOLD
ADJUST
LOL
LOS
LOL
LOS
CPWD+
GND
SIS
LREF
MUX
1
AMP
AMP
D
Q
VCO
AMP
AMP
LOOP
FILTER
/16
OR
/1
Φ
0
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX3877E/D | 功能描述:計(jì)時(shí)器和支持產(chǎn)品 RoHS:否 制造商:Micrel 類型:Standard 封裝 / 箱體:SOT-23 內(nèi)部定時(shí)器數(shù)量:1 電源電壓-最大:18 V 電源電壓-最小:2.7 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Reel |
| MAX3877EHJ | 功能描述:計(jì)時(shí)器和支持產(chǎn)品 2.5Gbps 3.3V Clock & Data Retiming IC RoHS:否 制造商:Micrel 類型:Standard 封裝 / 箱體:SOT-23 內(nèi)部定時(shí)器數(shù)量:1 電源電壓-最大:18 V 電源電壓-最小:2.7 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Reel |
| MAX3877EHJ-T | 功能描述:計(jì)時(shí)器和支持產(chǎn)品 2.5Gbps 3.3V Clock & Data Retiming IC RoHS:否 制造商:Micrel 類型:Standard 封裝 / 箱體:SOT-23 內(nèi)部定時(shí)器數(shù)量:1 電源電壓-最大:18 V 電源電壓-最小:2.7 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Reel |
| MAX3877EVKIT | 功能描述:計(jì)時(shí)器和支持產(chǎn)品 Evaluation Kit for the MAX3877 MAX3878 RoHS:否 制造商:Micrel 類型:Standard 封裝 / 箱體:SOT-23 內(nèi)部定時(shí)器數(shù)量:1 電源電壓-最大:18 V 電源電壓-最小:2.7 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Reel |
| MAX3878E/D | 功能描述:計(jì)時(shí)器和支持產(chǎn)品 2.5Gbps +3.3V Clock and Data Retiming ICs with vertical Threshold Adjust RoHS:否 制造商:Micrel 類型:Standard 封裝 / 箱體:SOT-23 內(nèi)部定時(shí)器數(shù)量:1 電源電壓-最大:18 V 電源電壓-最小:2.7 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Reel |
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