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| 型号： | LTC5100EUF |
| 厂商： | Linear Technology |
| 文件页数： | 41/52页 |
| 文件大小： | 0K |
| 描述： | IC DRIVER VCSEL 3.2GBPS 16QFN |
| 标准包装： | 91 |
| 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： | 管件 |
| 安装类型： | 表面贴装 |
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LTC5100
REGISTER DEFI ITIO S
Table 20. Register: FLT_CONFIG—Fault Configuration (Refer also to Table 1) (I 2 C Command Code 0x13)
REGISTER
RESET VALUE
.BITFIELD
.Reserved
Rep_flt_inhibit
BIT
15:12
11
(BIN)
0
FUNCTION AND VALUES
Repeated Fault Inhibit
0: Allow Repeated Attempts to Clear a Fault and Re-enable the Transmitter.
1: Inhibit Repeated Attempts to Clear a Fault. Only One Attempt to Clear a Fault is Allowed. If the Fault
Recurs Within 25ms of Re-enabling the Transmitter, the Transmitter is Disabled Until Power is
Cycled.
Rapid_restart_en
10
1
Rapid_restart_en
0: Rapid Restart Disabled: The Servo Controller Settings for the Laser Bias and Modulation Currents
are Reset to Zero when the Transmitter is Disabled. When Re-enabled, the Laser Currents Start from
Zero and Settle Typically Within the 300ms Standard Initialization Time, t_int, from the GBIC
Specification.
1: Rapid Restart Enabled: The Servo Controller Settings for the Laser Bias and Modulation Currents are
Retained when the Transmitter is Disabled. When Re-enabled, the Retained Servo Values are Loaded
into the SRC_DAC and MOD_DAC, Allowing Settling Typically Within the 1ms Standard Turn-On
Time, t_on, from the GBIC Specification.
Flt_drv_mode
9
8
0
0
FAULT Pin Drive Mode
00: Open Drain (3.3mA Sink Capability)
01: Open Drain, 280 μ A Internal Pull Up
10: Open Drain, 425 μ A Internal Pull Up
11: Push-Pull (3.3mA Source and Sink Capability)
Lpc_en
7
1
Laser Power Controller (LPC) Enable
0: LPC Disabled: Allows External Control of the SRC_DAC and MOD_DAC Registers from the Serial
Interface. This Setting Gives an External Microprocessor or Test Computer Full Control of the
SRC_DAC and MOD_DAC Registers.
1: LPC Enabled: The LPC Continuously Updates the SRC_DAC and MOD_DAC Registers to Servo
Control the Laser. (Any Values Written to These Registers Over the Serial Interface Will be
Overwritten by the LPC.)
Auto_shutdn_en
6
1
Automatic Transmitter Shutdown Enable
0: Disabled: When a Fault Occurs the LTC5100 Continues to Drive the Laser. This Mode Allows a
Microprocessor or Test Computer to Mediate the Decision to Shut Down the Transmitter. The
Microprocessor can Turn Off the Transmitter by Driving the EN Pin Inactive or by Clearing the
Soft_en Bit in the SYS_CONFIG Register.
1: Enabled: When a Fault Occurs, the Transmitter is Automatically Disabled.
Flt_pin_polarity
5
1
FAULT Pin Polarity
0: Active Low: The FAULT Pin is Driven Low to Signal a Fault.
1: Active High: The FAULT Pin is Driven High to Signal a Fault.
Flt_pin_override
4
0
FAULT Pin Override
0: The FAULT Pin is Driven Active when a Fault Occurs.
1: Internal Control of the FAULT Pin is Overridden. When a Fault Occurs, the Fault is Detected and
Latched Internally, but the FAULT Pin Remains Inactive. This Mode Allows a Microprocessor or Test
Computer to Mediate Fault Handling. The Microprocessor can Drive the FAULT Pin Active by Setting
the Force_flt Bit.
Force_flt
3
0
Force the FAULT Pin Output.
Force_flt Gives a Microprocessor or Test Computer Full Control of the FAULT Pin, Allowing External
Mediation of Fault Handling.
0: Force the FAULT Pin Inactive.
1: Force the FAULT Pin Active.
This Bit Has No Effect Unless Flt_pin_override = 1.
Over_pwr_en
2
1
Enables Detection of a Laser Overpower Fault.
0: Disabled, 1: Enabled
Under_pwr_en
1
1
Enables Detection of a Laser Underpower Fault.
0: Disabled, 1: Enabled
Over_current_en
0
1
Enables Detection of a Laser Overcurrent Fault.
0: Disabled, 1 Enabled
sn5100 5100fs
41
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