参数资料
| 型号： | SY88793VKG |
| 厂商： | Micrel Inc |
| 文件页数： | 5/8页 |
| 文件大小： | 0K |
| 描述： | IC POST AMP PECL LP LIMIT 10MSOP |
| 标准包装： | 100 |
| 类型： | 限幅后置放大器 |
| 应用： | 光纤学网络 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 10-MSOP |
| 包装： | 管件 |
| 产品目录页面： | 1089 (CN2011-ZH PDF) |
| 其它名称： | 576-2547 SY88793VKG-ND |
5
SY88793V
Micrel, Inc.
M9999-072505
hbwhelp@micrel.com or (408) 955-1690
DETAILED DESCRIPTION
The SY88793V 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 622Mbps
and as small as 5mVp-p can be amplified. Figure 1 shows
the allowed input voltage swing. The SY88793V generates
an SD output. SD
LVL sets the sensitivity of the input
amplitude detection.
Input Amplifier/Buffer
Figure 2 shows a simplified schematic of the SY88793V'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 SY88793V outputs typically 1500mV
PP voltage-limited
waveforms for input signals that are greater than 18mV
PP.
Applications requiring the SY88793V to operate with high-
gain should have the upstream TIA placed as close as
possible to the SY88793V’s input pins to ensure the best
performance of the device.
Output Buffer
The SY88793V’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.
Signal-Detect
The SY88793V generates a chatter-free SD open-collector
TTL output with internal 6.75k
pullup resistor as shown in
Figure 4. SD is used to determine that the input amplitude
is large enough to be considered a valid input. SD asserts
high if the input amplitude rises above the threshold set by
SD
LVL and deasserts low otherwise. SD 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 6dB SD
hysteresis is provided to prevent chattering.
Signal-Detect Level Set
A programmable SD level set pin (SDLVL) sets the
threshold of the input amplitude detection. Connecting an
external resistor between V
CC and SDLVL sets the voltage
at SD
LVL. This voltages ranges from VCC to VREF. The
external resistor creates a voltage divider between V
CC and
V
REF as shown in Figure 5. If desired, an appropriate
external voltage may be applied rather than using a resistor.
The smaller the external resistor, implying a smaller voltage
difference from SD
LVL to VCC, the smaller the SD sensitivity.
Hence, larger input amplitude is required to assert SD.
“Typical Operating Characteristics” shows the relationship
between the input amplitude detection sensitivity and the
SDLVL voltage.
Hysteresis
The SY88793V provides typically 6dB SD 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 SY88793V provides typically 3dB SD
optical hysteresis. As the SY88793V is an electrical device,
this datasheet refers to hysteresis in electrical terms. With
6dB SD hysteresis, a voltage factor of two is required to
assert or deassert SD.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SY88793VKG TR | 功能描述:限幅放大器 3.3V/5V 622Mbps PECL Post Amplifier: 1xSD gain/1xTC/10 MSOP/Indus’l/T+R (I Temp, Green) RoHS:否 制造商:Micrel 输入电压范围（最大值）:3.6 V 工作电源电压:3.3 V 电源电流:40 mA 工作温度范围:- 40 C to + 85 C 封装 / 箱体:MSOP-10 封装:Tube |
| SY88793VKGTR | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:3.3V/5V 622Mbps PECL LOW-POWER LIMITING POST AMPLIFIER WITH TTL SIGNAL DETECT |
| SY88793VKI | 功能描述:IC AMP POST PECL 3.3/5V 10-MSOP RoHS:否 类别:集成电路 (IC) >> 线性 - 放大器 - 专用 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:60 系列:- 类型:可变增益放大器 应用:CATV 安装类型:表面贴装 封装/外壳:20-WQFN 裸露焊盘 供应商设备封装:20-TQFN-EP（5x5） 包装:托盘 |
| SY88793VKI TR | 功能描述:IC AMP POST PECL 3.3/5V 10-MSOP RoHS:否 类别:集成电路 (IC) >> 线性 - 放大器 - 专用 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:60 系列:- 类型:可变增益放大器 应用:CATV 安装类型:表面贴装 封装/外壳:20-WQFN 裸露焊盘 供应商设备封装:20-TQFN-EP（5x5） 包装:托盘 |
| SY88802 | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:5V 155Mbps LASER DIODE DRIVER WITH OUTPUT ENABLE |
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