- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄373784 > ZL40518LDG (Zarlink Semiconductor Inc.) 3 Channel Laser Diode Driver PDF資料下載
參數(shù)資料
| 型號(hào)： | ZL40518LDG |
| 廠商： | Zarlink Semiconductor Inc. |
| 英文描述： | 3 Channel Laser Diode Driver |
| 中文描述： | 3通道激光二極管驅(qū)動(dòng)器 |
| 文件頁數(shù)： | 3/16頁 |
| 文件大?。?/td> | 330K |
| 代理商： | ZL40518LDG |
ZL40518
Data Sheet
3
Zarlink Semiconductor Inc.
signal will be clipped on the negative cycle of the signal. This will increase the harmonic content of the output signal
and reduce the pk to pk amplitude output.
Thermal Considerations
Package thermal resistance is 40
°
C/W under the EIA/JESD51-3 compliant PCB test board condition. Users should
ensure that the junction temperature does not exceed 150
°
C. Thermal resistance from junction to case and to
ambient is very much dependent on how the IC is mounted onto the board, on the PCB layout and on any heat
extraction arrangements. Power consumption and system ambient operating temperature limits should be noted
and careful thermal gradient calculations undertaken to ensure that the junction temperature never exceeds 150
°
C.
Electrical and Optical Pulse Response
Figure 3 - Pulse Response Model
Figure 3 illustrates a simplified model of the typical ZL40518 and the application. The ZL40518 consist of an ideal
switched current source and an equivalent model of the ZL40518 output stage. The Electrical Model for the Laser
Diode is a Voltage source Vd (V_on) in series with the On Resistance Rd all in parallel with the Junction
Capacitance Cd. This simplified model approximately represents the Laser Diode Electrical load when operated
beyond the Laser Threshold. To a first approximation, the Optical output is proportional to the current flow in the
Resistor Rd.
The Laser Diode and the ZL40518 are connected together by interconnect tracks with the return current passing
through the supply decoupling bypass capacitor between ground and output Vcc. The ZL40518 will typically switch
the programmed output current in 400 ps and can be approximated to an ideal switch with a propagation delay of
Iout_on (1.2 nS). The electrical pulse response parameters, Trise, Tfall, Overshoot and Undershoot are determined
by the combined electrical network as illustrated in Figure 3.
For example, the Rise Time and Fall time for large current steps can be slew rate limited by the combined
interconnect and fixed interconnect inductance. The Fixed Inductance represents that associated with packaging
and minimum interconnect distance . The Interconnect Inductance is that associated with the additional tracking
between Laser Diode and the ZL40518 to accommodate application physical limitations.
For example, if a pulse of 260 mA amplitude (40 mA to 300 mA) is to be switched in a time of 1 ns with the Vd =
1.6 V, then the maximum volt drop across the interconnect inductance is approximately 3.5 V (maximum Vpin for
300 mA output) - 1.6 V (Vdiode) = 1.9 V. Consequently, L*di/dt < 1.9 V. Hence , L < 1.9/ (0.26A/1ns)
= 7.3 nH.
En
Iout
500
17p
15
2p
ZL40518 Model
Vd
Rd
Cd
Lint
C_out
Lfix
= 3nH
Lint=5nH , BW = 460MHz, Rd=7, Q=j20/(15+7) =0.9
Lint=5nH, BW = 460MHz, Rd=3, Q=j20/(15+3) = 1.11
Lint=7nH, BW = 411MHz, Rd=7, Q=j18/(15+7) = 0.8
Lint=7nH, BW = 411MHz,
Rd=3, Q=j18/(15+3) = 1.0
Lint
Lfix
= 3nH
C_bypass
K
K
Vcc
_A
OutA
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ZL40518DGE1 | 3 Channel Laser Diode Driver |
| ZL40539 | Dual Output CD and DVD 4 Channel Laser Diode Driver |
| ZL40539LCF | Dual Output CD and DVD 4 Channel Laser Diode Driver |
| ZL40539LCG | Dual Output CD and DVD 4 Channel Laser Diode Driver |
| ZL40800 | 6 GHz Fixed Modulus Prescalers |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ZL40539 | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:Dual Output CD and DVD 4 Channel Laser Diode Driver |
| ZL40539LCF | 制造商:Microsemi Corporation 功能描述: 制造商:Microsemi Corporation 功能描述:LASER DRVR 4-CH 32QFN - Trays |
| ZL40539LCG | 制造商:Microsemi Corporation 功能描述: 制造商:Microsemi Corporation 功能描述:4 CHAN LVDS LDD C3C31C - Trays 制造商:Rochester Electronics LLC 功能描述: 制造商:Zarlink Semiconductor Inc 功能描述: 制造商:ZARLINK 功能描述: |
| ZL40800 | 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:6 GHz Fixed Modulus Prescalers |
| ZL40800/DCA | 制造商:Microsemi Corporation 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。