参数资料
| 型号： | SY88303BLEY TR |
| 厂商： | Micrel Inc |
| 文件页数： | 9/11页 |
| 文件大小： | 0K |
| 描述： | IC AMP CML LIMITING POST 10MSOP |
| 标准包装： | 1,000 |
| 放大器类型： | 限制 |
| 电路数： | 1 |
| 输出类型： | 差分 |
| -3db带宽： | 2GHz |
| 电流 - 电源： | 38mA |
| 电流 - 输出 / 通道： | 50mA |
| 电压 - 电源，单路/双路(±)： | 3 V ~ 3.6 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 |
| 供应商设备封装： | 10-MSOP 裸露焊盘 |
| 包装： | 带卷 (TR) |
Micrel, Inc.
SY88303BL
November 2007
7
M9999-110207-A
hbwhelp@micrel.com or (408) 955-1690
Functional Block Diagram
Detailed Description
The SY88303BL low-power limiting post amplifiers
operate from a single +3.3V power supply, over
temperatures from –40
oC to +85oC. Signals with data
rates up to 3.2Gbps and as small as 10mVPP can be
amplified. Figure 1 shows the allowed input voltage
swing. The SY88303BL generates a LOS output
allowing feedback to /EN for output stability. LOSLVL sets
the sensitivity of the input amplitude detection.
Input Amplifier Buffer
Figure 2 shows a simplified schematic of the input
stage. The high-sensitivity of the input amplifier allows
signals as small as 10mVPP to be amplified. The input
amplifier
also
allows
input
signals
as
large
as
1800mVPP. Input signals below 12mVpp are linearly
amplified with a typical 42dB differential voltage gain.
Since it is a limiting amplifier, these devices output
typically 800mVPP voltage-limited waveforms for input
signals greater than 12mVPP. Applications requiring the
SY88303BL to operate with strong signals should have
the upstream TIA placed as close as possible to the
devices’ input pins. This ensures the best performance
of the device.
Output Buffer
The SY88303BL CML output buffers are designed to
drive 50
lines. The output buffer requires appropriate
termination for proper operation. An external 50
resistor to VCC for each output pin provides this. Figure 3
shows a simplified schematic of the output stage.
Loss-of-Signal
The SY88303BL generates a chatter-free LOS open-
collector TTL output, as shown in Figure 4. LOS is used
to determine that the input amplitude is large enough to
be considered a valid input. LOS asserts high if the input
amplitude falls below the threshold sets by LOSLVL and
de-asserts low otherwise. LOS can be fed back to the
enable bar (/EN) input to maintain output stability under
a loss-of-signal condition. /EN de-asserts the true output
signal without removing the input signals.
Loss-of-Signal Level Set
Programmable LOS level-set pin (LOSLVL) sets the
threshold of the input amplitude detection. Connecting
an external resistor between VCC and LOSLVL set the
voltage at LOSLVL. This voltage ranges from VCC to VREF.
The external resistor creates a voltage divider between
VCC and VREF, as shown in Figure 5.
Hysteresis
The SY88303BL typically provides 3.5dB LOS electrical
hysteresis. By definition, a power ratio measured in dB
is 10log (power ratio). Power is calculated as V
2
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 therefore, the ratios change linearly. Thus,
the optical hysteresis in dB is half the electrical
hysteresis in dB given in the data sheet. Since the
SY88303BL is an electrical device, this data sheet refers
to hysteresis in electrical terms. With 3.5dB LOS
hysteresis, a voltage factor of 1.5 is required to assert or
de-assert LOS.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SY88303BLMG | 功能描述:限幅放大器 3.3V 155-3200 Mbps CML Post Amp: 0.5xLOSgain/20xTC/16 MLF (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 |
| SY88303BLMG TR | 功能描述:限幅放大器 3.3V 155-3200 Mbps CML Post Amp: 0.5xLOSgain/20xTC/16 MLF (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 |
| SY88303BLMGTR | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:3.3V, 3.2Gbps CML Limiting Post Amplifier with Wide Loss-of-Signal Detection Range |
| SY88305BL | 制造商:MICREL 制造商全称:Micrel Semiconductor 功能描述:3.3V, 3.2Gbps CML Limiting Post Amplifier with Wide Signal-Detect Range |
| SY88305BLEY | 功能描述:限幅放大器 3.3V, 3.2Gbps CML Limiting Post Amplifier with Wide Signal-Detect Range 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 |
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