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參數(shù)資料
| 型號： | SY88803VKC |
| 廠商： | Micrel Inc |
| 文件頁數(shù)： | 5/8頁 |
| 文件大小： | 0K |
| 描述： | IC AMP POST PECL 3.3V/5V 10-MSOP |
| 標(biāo)準(zhǔn)包裝： | 100 |
| 類型： | 限幅后置放大器 |
| 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） |
| 供應(yīng)商設(shè)備封裝： | 10-MSOP |
| 包裝： | 管件 |
5
SY88803V
Micrel, Inc
M9999-051706
hbwhelp@micrel.com or (408) 955-1690
DETAILED DESCRIPTION
The SY88803V low-power limiting post-amplifier operates
from a single +3.3V or +5V power supply, over temperatures
from –40
°C to +85°C. Signals with data rates up to 155Mbps
and as small as 5mV
PP can be amplified. Figure 1 shows
the allowed input voltage swing. The SY88803V generates
an LOS output. LOS
LVL sets the sensitivity of the input
amplitude detection.
Input Amplifier/Buffer
Figure 2 shows a simplified schematic of the SY88803V's
input stage. The high-sensitivity of the input amplifier allows
signals as small as 5mV
PP to be detected and amplified.
The input amplifier allows input signals as large as
1800mV
PP. Input signals are linearly amplified with a typically
38dB differential voltage gain. Since it is a limiting amplifier,
the SY88803V outputs typically 1500mV
PP voltage-limited
waveforms for input signals that are greater than 18mV
PP.
Applications requiring the SY88803V to operate with high-
gain should have the upstream TIA placed as close as
possible to the SY88803V’s input pins to ensure the best
performance of the device.
Output Buffer
The SY88803V’s PECL output buffer is designed to drive
50
lines. The output buffer requires appropriate termination
for proper operation. An external 50
resistor to V
CC–2V
for each output pin provides this. Figure 3 shows a simplified
schematic of the output stage and includes an appropriate
termination method.
Loss-of-Signal
The SY88803V generates a chatter-free TTL LOS. A
recommended 2.5k
pullup resistor to V
CC is required for
proper operation, as shown in Figure 4. LOS is used to
determine that the input amplitude is too small to be
considered a valid input. LOS asserts high if the input
amplitude falls below the threshold set by LOS
LVL and
deasserts low otherwise. LOS can be fed back to the enable
(/EN) input to maintain output stability under a loss of signal
condition. /EN deasserts the true output signal without
removing the input signals. Typically 4.6dB LOS hysteresis
is provided to prevent chattering.
Loss-of-Signal Level Set
A programmable loss-of-signal level set pin (LOSLVL) sets
the threshold of the input amplitude detection. Setting a
voltage on LOSLVL between VCC and VREF sets this
threshold. If desired, a resistor divider between V
CC and
V
REF, as shown in Figure 5, also creates this threshold.
The smaller the voltage difference from LOS
LVL to VCC, the
smaller the LOS sensitivity. Hence, larger input amplitude is
required to deassert LOS. “Typical Operating Characteristics”
shows the relationship between the input amplitude detection
sensitivity and the LOSLVL voltage.
Hysteresis
The SY88803V provides typically 4.6dB LOS electrical
hysteresis. By definition, a power ratio measured in dB is
10log(power ratio). Power is calculated as V2
IN/R for an
electrical signal. Hence the same ratio can be stated as
20log(voltage ratio). While in linear mode, the electrical
voltage input changes linearly with the optical power and
hence the ratios change linearly. Therefore, the optical
hysteresis in dB is half the electrical hysteresis in dB given
in the datasheet. The SY88803V provides typically 2.3dB
LOS optical hysteresis. As the SY88803V is an electrical
device, this datasheet refers to hysteresis in electrical terms.
With 6dB LOS hysteresis, a voltage factor of two is required
to assert or deassert LOS.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SY88803VKC TR | 功能描述:IC AMP POST PECL 3.3V/5V 10-MSOP RoHS:否 類別:集成電路 (IC) >> 線性 - 放大器 - 專用 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:60 系列:- 類型:可變增益放大器 應(yīng)用:CATV 安裝類型:表面貼裝 封裝/外殼:20-WQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:20-TQFN-EP（5x5） 包裝:托盤 |
| SY88803VKCTR | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:3.3V/5V 155Mbps PECL LOW POWER LIMITING POST AMPLIFIER W/TTL LOS |
| SY88803VKG | 功能描述:限幅放大器 3.3V/5V 155Mbps PECL Post Amplifier: 1xLOS 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 |
| SY88803VKG TR | 功能描述:限幅放大器 3.3V/5V 155Mbps PECL Post Amplifier: 1xLOS 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 |
| SY88803VKGTR | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:3.3V/5V 155Mbps PECL LOW POWER LIMITING POST AMPLIFIER W/TTL LOS |
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