- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄378286 > ADN2525ACPZ-R2 (ANALOG DEVICES INC) 10.7 Gbps Active Back-Termination, Differential Laser Diode Driver PDF資料下載
參數(shù)資料
| 型號(hào)： | ADN2525ACPZ-R2 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 其它接口 |
| 英文描述： | 10.7 Gbps Active Back-Termination, Differential Laser Diode Driver |
| 中文描述： | SPECIALTY INTERFACE CIRCUIT, QCC16 |
| 封裝： | 3 X 3 MM, LEAD FREE, MO-220VEED-2, LFCSP-16 |
| 文件頁(yè)數(shù)： | 9/16頁(yè) |
| 文件大?。?/td> | 531K |
| 代理商： | ADN2525ACPZ-R2 |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)當(dāng)前第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)
ADN2525
THEORY OF OPERATION
As shown in Figure 1, the ADN2525 consists of an input stage
and two voltage controlled current sources for bias and modula-
tion. The bias current is available at the IBIAS pin. It is controlled
by the voltage at the BSET pin, and can be monitored at the
IBMON pin. The differential modulation current is available at
the IMODP and IMODN pins. It is controlled by the voltage at
the MSET pin. The output stage implements the active back-
match circuitry for proper transmission line matching and
power consumption reduction. The ADN2525 can drive a load
having differential resistance ranging from 5 to 50 . The
excellent back-termination in the ADN2525 absorbs signal
reflections from the TOSA end of the output transmission lines,
enabling excellent optical eye quality to be achieved even when
the TOSA end of the output transmission lines is significantly
mis-terminated.
Rev. 0 | Page 9 of 16
INPUT STAGE
The input stage of the ADN2525 converts the data signal applied
to the DATAP and DATAN pins to a level that ensures proper
operation of the high speed switch. The equivalent circuit of the
input stage is shown in Figure 17.
VCC
50
50
VCC
DATAP
DATAN
0
VCC
Figure 17. Equivalent Circuit of the Input Stage
The DATAP and DATAN pins are terminated internally with a
100 differential termination resistor. This minimizes signal
reflections at the input, which could otherwise lead to degrada-
tion in the output eye diagram. It is not recommended to drive
the ADN2525 with single-ended data signal sources.
The ADN2525 input stage must be ac-coupled to the signal
source to eliminate the need for matching between the common-
mode voltages of the data signal source and the input stage of
the driver (see Figure 18). The ac-coupling capacitors should
have an impedance less than 50 over the required frequency
range. Generally this is achieved using 10 nF to 100 nF capacitors.
0
ADN2525
DATAP
DATAN
C
C
50
50
DATA SIGNAL SOURCE
Figure 18. AC-Coupling the Data Source to the
ADN2525 Data Inputs
BIAS CURRENT
The bias current is generated internally using a voltage-to-current
converter consisting of an internal operational amplifier and a
transistor as shown in Figure 19.
0
GND
200
800
2
R
R
VCC
IBMON
BSET
I
BMON
ADN2525
I
BIAS
200
IBIAS
Figure 19. Voltage-to-Current Converter Used to Generate IBIAS
The voltage-to-current conversion factor is set at 100 mA/V by
the internal resistors, and the bias current is monitored using a
current mirror with a gain equal to 1/100. By connecting a 1 k
resistor between IBMON and GND, the bias current can be
monitored as a voltage across the resistor. A low temperature
coefficient precision resistor must be used for the IBMON
resistor (R
IBMON
). Any error in the value of R
IBMON
due to toler-
ances, or drift in its value over temperature, contributes to the
overall error budget for the IBIAS monitor voltage. If the IBMON
voltage is being connected to an ADC for A/D conversion,
R
IBMON
should be placed close to the ADC to minimize errors
due to voltage drops on the ground plane.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ADN2525ACPZ-REEL7 | 10.7 Gbps Active Back-Termination, Differential Laser Diode Driver |
| ADN2525ACPZ-WP | 10.7 Gbps Active Back-Termination, Differential Laser Diode Driver |
| ADP3415 | Dual MOSFET Driver with Bootstrapping |
| ADP3415LRM-REEL | Dual MOSFET Driver with Bootstrapping |
| ADP3415LRM-REEL7 | Dual MOSFET Driver with Bootstrapping |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADN2525ACPZ-REEL7 | 功能描述:IC LASER DRIVER 10.7GBPS 16LFCSP RoHS:是 類別:集成電路 (IC) >> PMIC - 激光驅(qū)動(dòng)器 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:激光二極管驅(qū)動(dòng)器 數(shù)據(jù)速率:- 通道數(shù):4 電源電壓:3.3V 電流 - 電源:- 電流 - 調(diào)制:- 電流 - 偏置:- 工作溫度:0°C ~ 70°C 封裝/外殼:40-TQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:40-TQFN EP 包裝:托盤 安裝類型:表面貼裝 |
| ADN2525ACPZ-WP | 制造商:Analog Devices 功能描述:Laser Driver 10.7Gbps 1-CH 16-Pin LFCSP EP Waffle 制造商:Analog Devices 功能描述:LASER DRVR 10.7GBPS 1CH 16LFCSP - Waffle Pack |
| ADN2526 | 制造商:AD 制造商全稱:Analog Devices 功能描述:11.3 Gbps Active Back-Termination, Differential Laser Diode Driver |
| ADN2526ACPZ | 功能描述:IC LASER DRIVER 11.3GBPS 16LFCSP RoHS:是 類別:集成電路 (IC) >> PMIC - 激光驅(qū)動(dòng)器 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:激光二極管驅(qū)動(dòng)器 數(shù)據(jù)速率:- 通道數(shù):4 電源電壓:3.3V 電流 - 電源:- 電流 - 調(diào)制:- 電流 - 偏置:- 工作溫度:0°C ~ 70°C 封裝/外殼:40-TQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:40-TQFN EP 包裝:托盤 安裝類型:表面貼裝 |
| ADN2526ACPZ-R2 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述: |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。