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參數(shù)資料
| 型號(hào)： | MAX3268CUB+T |
| 廠商： | Maxim Integrated Products |
| 文件頁(yè)數(shù)： | 5/17頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC AMP LIMITING 1.25GBPS 10-UMAX |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 類型： | 限幅放大器 |
| 應(yīng)用： | 光纖學(xué)網(wǎng)絡(luò) |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 10-TFSOP，10-MSOP（0.118"，3.00mm 寬）裸露焊盤(pán) |
| 供應(yīng)商設(shè)備封裝： | 10-µMAX-EP |
| 包裝： | 帶卷 (TR) |
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MAX3264/MAX3265/MAX3268/MAX3269/MAX3765/MAX3768
+3.0V to +5.5V, 1.25Gbps/2.5Gbps
Limiting Amplifiers
______________________________________________________________________________________
13
Applications Information
Optical Hysteresis
In an optical receiver, the electrical power change at
the limiting amplifier is 2x the optical power change.
As an example, if a receiver’s optical input power (x)
increases by a factor of two, and the preamplifier is lin-
ear, then the voltage input to the limiting amplifier also
increases by a factor of two.
The optical power change is 10log(2x / x) = 10log(2) =
+3dB.
At the limiting amplifier, the electrical power change is:
The MAX3264/MAX3265/MAX3268/MAX3269/MAX3765s’
typical voltage hysteresis is 4.4dB. This provides an opti-
cal hysteresis of 2.2dB.
GBIC Loss of Signal
In a GBIC application, the GBIC’s LOS output must be
high impedance when VCC_MODULE = GND. Figure 8
shows the recommended circuit to maintain high
impedance. ESD protection diodes on the MAX3264/
MAX3265/MAX3268/MAX3269/MAX3765/MAX3768
LOS outputs can be turned on when VCC_HOST >
VCC_MODULE.
PECL Terminations
The standard PECL termination (50 to VCC - 2V) is
recommended for best performance and output char-
acteristics (see Figure 1). The data outputs operate at
high speed and should always drive transmission lines
with matched, balanced terminations.
Figure 9 shows an alternate method for terminating the
data outputs. The technique provides approximately
8mA DC bias current, with a 45 AC load, for the out-
put termination. This technique is useful for viewing the
output on an oscilloscope or changing the PECL refer-
ence voltage.
Wire Bonding Dice
For high current density and reliable operation, the
MAX3264/MAX3265/MAX3268/MAX3269 use gold met-
alization. Make connections to the dice with gold wire
only, and use ballbonding techniques (wedge bonding
is not recommended). Die-pad size is 4-mils square,
with a 6-mil pitch. Die thickness is 15 mils (0.375mm).
10log
2V
/ R
V/ R
10log(2 )
20log(2)
6dB
IN
2
IN
2
IN
2
()
==
= +
VCC_MODULE
GBIC MODULE
VCC_HOST
4.7k
HOST
LOS
GENERAL-
PURPOSE
NPN
MAX3264
MAX3265
MAX3268
MAX3269
MAX3765
MAX3768
Figure 8. Recommended GBIC LOS Circuit
470
DRIVING 50 TO GROUND
470
50
OUT+
OUT-
MAX3268
MAX3269
MAX3768
Figure 9. Alternative PECL Termination
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX3269C/D | 功能描述:限幅放大器 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 |
| MAX3269C/D DIE | 制造商:Maxim Integrated Products 功能描述: |
| MAX3269CUB | 功能描述:限幅放大器 3-5.5V 1.25/2.5Gbps Limiting Amplifier 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 |
| MAX3269CUB+ | 功能描述:限幅放大器 3-5.5V 1.25/2.5Gbps Limiting Amplifier 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 |
| MAX3269CUB+T | 功能描述:限幅放大器 3-5.5V 1.25/2.5Gbps Limiting Amplifier 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 |
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