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參數資料
| 型號： | SY88903 |
| 廠商： | Micrel Semiconductor,Inc. |
| 英文描述： | 1.25Gbps HIGH-SPEED LIMITING POST AMPLIFIER |
| 中文描述： | 達1.25Gbps高速限制后級放大器 |
| 文件頁數： | 1/8頁 |
| 文件大小： | 102K |
| 代理商： | SY88903 |
DESCRIPTION
I
Up to 1.25Gbps operation
I
Low noise
I
Chatter-Free LOS Generation
I
Open Collector TTL LOS Output
I
TTL /EN Input
I
Differential PECL inputs for data
I
Single power supply
I
Designed for use with SY88902 and SY88904
I
Available in a tiny 10-pin (3mm) MSOP
The SY88903 limiting post amplifier with its high gain
and wide bandwidth is ideal for use as a post amplifier in
fiber-optic receivers with data rates up to 1.25Gbps.
Signals as small as 5mVp-p can be amplified to drive
devices with PECL inputs. The SY88903 generates a
chatter-free Loss of Signal (LOS) open collector TTL
output.
The SY88903 incorporates a programmble level detect
function to identify when the input signal has been lost.
This information can be fed back to the /EN input of the
device to maintain stability under loss of signal conditions.
Using LOS
LVL
pin the sensitivity of the level detect can
be adjusted. The LOS
LVL
voltage can be set by
connecting a resistor divider between V
CC
and V
REF
,
Figure 3. Figure 4 shows the relationship between input
level sensitivity and the voltage set on LOS
LVL
. Figure 5
shows the relationship between input level sensitivity and
resistor divider ratio.
The LOS output is a TTL open collector output that
requires pull-up resistor for proper operation, Figure 1.
SY88903
LOS
+5V
2k
Figure 1. LOS Output with Desired Rise Time
FEATURES
1.25Gbps HIGH-SPEED
LIMITING POST AMPLIFIER
SY88903
APPLICATIONS
I
1.25Gbps Gigabit Ethernet
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531Mbps and 1062Mbps Fibre Channel
I
622Mbps SONET
I
Gigabit Interface Converter
BLOCK DIAGRAM
Limiting
Amplifier
D
IN
D
IN
Level
Detect
ECL
Buffer
Enable
D
OUT
D
OUT
LOS
LVL
LOS
GND
V
CC
EN
V
REF
PIN CONFIGURATION
1
/EN
D
IN
/D
IN
V
REF
LOS
LVL
10 V
CC
D
OUT
/D
OUT
LOS
GND
9
8
7
6
2
3
4
5
MSOP
K10-1
1
Rev.: G
Issue Date: July 2000
Amendment: /1
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相關代理商/技術參數 |
參數描述 |
|---|---|
| SY88903_07 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:1.25Gbps HIGH-SPEED LIMITING POST AMPLIFIER |
| SY88903AL | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:3.3V, Burst Mode 1.25Gbps PECL High-Sensitivity Limiting Post Amplifier with TTL Loss-of-Signal |
| SY88903ALKG | 功能描述:限幅放大器 3.3V 1.25Gbps PECL Post Amp: 4xLOS gain/1xTC /10 MSOP//Bulk (I Temp, Green) RoHS:否 制造商:Micrel 輸入電壓范圍（最大值）:3.6 V 工作電源電壓:3.3 V 電源電流:40 mA 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:MSOP-10 封裝:Tube |
| SY88903ALKG TR | 功能描述:限幅放大器 3.3V 1.25Gbps PECL Post Amp: 4xLOS gain/1xTC /10 MSOP//T+R (I Temp, Green) RoHS:否 制造商:Micrel 輸入電壓范圍（最大值）:3.6 V 工作電源電壓:3.3 V 電源電流:40 mA 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:MSOP-10 封裝:Tube |
| SY88903ALKGTR | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:3.3V, Burst Mode 1.25Gbps PECL High-Sensitivity Limiting Post Amplifier with TTL Loss-of-Signal |
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