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参数资料
| 型号： | LTC5100EUF#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 36/52页 |
| 文件大小： | 0K |
| 描述： | IC DRIVER VCSEL 3.2GBPS 16QFN |
| 标准包装： | 2,500 |
| 类型： | 激光二极管驱动器 |
| 数据速率： | 3.2Gbps |
| 通道数： | 1 |
| 电源电压： | 3.135 V ~ 3.465 V |
| 电流 - 电源： | 54mA |
| 电流 - 调制： | 12mA |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 16-WQFN 裸露焊盘 |
| 供应商设备封装： | 16-QFN（4x4） |
| 包装： | 带卷 (TR) |
| 安装类型： | 表面贴装 |
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LTC5100
REGISTER DEFI ITIO S
Table 9. Register: LOOP_GAIN—Control Loop Gain (I 2 C Command Code 0x1E)
REGISTER
RESET VALUE
.BITFIELD
.Reserved
.Ib_gain
(.Apc_gain in APC
Mode)
BIT
15:8
7
6
5
4
3
(BIN)
0
0
1
0
0
FUNCTION AND VALUES
Bias Current or APC Loop Gain
This Bit Field Modifies the Open-Loop Gain of the Bias Current Servo Control Loop. The Effect of This
Bit Field Differs in Constant Current Control (CCC) Mode and in Automatic Power Control (APC) Mode.
In CCC Mode, This Bit Field is Called lb_gain. In APC Mode, This Bit Field is Called Apc_gain.
Constant Current Control (CCC) Mode (Apc_en = 0): The Loop Gain and Settling Time are Independent
of Is_rng. The Default Value of Ib_gain Yields Stable but Slow Settling of the Laser Bias Current for
Any Value of Is_rng.
Automatic Power Control (APC) Mode (Apc_en = 1): The Open-Loop Gain of the Bias Current Servo
Loop Depends on the Value of Is_rng. The Default Value of Apc_gain Yields Stable but Potentially Slow
Settling of the Laser Bias Current for any Value of Is_rng.
Im_gain
2
1
0
0
0
1
Modulation Current Loop Gain
This Bit Field Modifies the Open-Loop Gain of the Modulation Current Servo Loop. The Open-Loop.
Gain is Approximately Im_gain/32. The Loop Gain and Settling Time are Independent of Im_rng. The
Default Value of Im_gain Yields Stable but Slow Settling of the Laser Modulation Current.
Table 10. Register: PEAKING—High Speed Modulation Peaking (I 2 C Command Code 0x1F)
REGISTER
RESET VALUE
.BITFIELD
.Reserved
.Peaking
BIT
15:5
4
3
2
1
0
(BIN)
1
0
0
0
0
FUNCTION AND VALUES
Peaking Control for the Modulation Output
This Bit Field Controls the High Speed Peaking of the Modulation Output. Decreasing the Value of
Peaking Increases the Undershoot on the Falling Edge of the Modulation Signal. The Peaking Control
can be Used to Compensate for Slow Laser Turn-Off Characteristics.
Table 11. Register: Reserved—Reserved for Internal Use. This Register is for Test Puposes Only. Do Not Write to this Register
(I 2 C Command Code 0x08)
REGISTER
RESET VALUE
.BITFIELD
.Reserved
.Reserved
.Reserved
BIT
15:7
6
5
4
3
2
1
0
(BIN)
1
0
0
0
1
0
0
FUNCTION AND VALUES
Reserved for Internal Use, Do Not Write.
Reserved for Internal Use, Do Not Write.
sn5100 5100fs
36
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