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| 型号： | LTC5100EUF#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 42/52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 21. Register: FLT_STATUS—Fault Status (I 2 C Command Code 0x12)
REGISTER
RESET VALUE
.BITFIELD
.Reserved
.Transmit_ready
BIT
15:11
10
(BIN)
0
FUNCTION AND VALUES
Transmit Ready
Indicates that the Laser Bias and Modulation Currents Have Settled to Within Specification and the
LTC5100 is Ready to Transmit Data. A Fault Clears This Bit.
0: Not Ready, 1: Ready
.Transmitter_
enabled
9
0
Transmitter Enabled
Indicates That the Transmitter is Enabled and the Laser Bias and Modulation Currents Are on (Though
Not Necessarily Settled.) The Transmitter is Enabled When the EN pin and Soft_en Bits are Active and
No Faults Have Occurred. A Fault Clears This Bit.
0: Transmitter is Disabled, 1: Transmitter is Enabled.
.En_pin_state
8
Varies
EN Pin State
Indicates the Logic Level on the EN Pin. The En_polarity Bit Has No Effect on En_pin_state.
The Power-On Reset Value Reflects the State of the EN Pin.
0: EN Pin is Low.
1: EN Pin is High.
.Faulted_twice
7
0
Faulted Twice (Only Active When Rep_flt_inhibit is Set)
0: Either No Faults or Only One Fault Has Been Detected.
1: A Second Fault Has Been Detected Within 25ms of Attempting to Clear a First Fault. The Transmitter
is Disabled and Can Only be Re-enabled by Cycling the Power.
.Faulted_once
6
1
Faulted Once (Only Active When Rep_flt_inhibit is Set)
Indicates That a First Fault Has Been Detected. After a Fault Occurs, Faulted_once Will be Set at the
Moment the Transmitter is Disabled (by Setting the EN pin of Soft_en Bit Inactive). If the Transmitter
is Subsequently Re-enabled and a Second Fault Occurs Within 25ms, the Faulted_twice Bit is Set. If
No Fault Occurs Within 25ms, the Faulted_once Bit is Cleared.
0: A First Fault Has Not Been Detected or Has Been Cleared.
1: A First Fault Has Been Detected.
.Faulted
5
1
Faulted
0: The LTC5100 is Not in the Faulted State.
1: A Fault Has Occurred and the LTC5100 Has Entered the Faulted State (the Transmitter is Not
Disabled Unless Auto_shutdn_en is Set).
.Under_votlage
Cleared-on-read
4
1
Undervoltage Fault Indicator (Always Enabled)
Indicates That a Power Supply Undervoltage Event Occurred.
0: No Fault, 1: Undervoltage Fault Detected.
The Undervoltage Bit is Always Set at Power Up. Read the FLT_STATUS Register Immediately After
Power-Up to Clear This Bit.
.Mem_load_error
Cleared-on-read
3
0
Memory (EEPROM) Load Error Indicator (Always Enabled)
Indicates That an Attempt to Load the Registers from EEPROM Was Started But Did Not Complete
Successfully.
0: No Fault, 1: EEPROM Load Failed.
.Over_power
Cleared-on-read
2
0
Laser Overpower Fault Indicator (Enabled by Over_pwr_en)
Indicates That a Laser Overpower Fault Occurred. Overpower Occurs When the Monitor Diode Current
Exceeds its Set Point. An Overpower Fault Can Occur Only in APC Mode.
0: No Fault, 1: Overpower Fault Detected.
.Under_power
Cleared-on-read
1
0
Laser Underpower Fault Indicator (Enabled by Under_pwr_en)
Indicates That a Laser Underpower Fault Occurred. Underpower Occurs When the Monitor Diode
Current Falls Below its Set Point. An Underpower Fault Can Occur Only in APC Mode.
0: No Fault, 1: Underpower Fault Detected.
.Over_current
Cleared-on-read
0
0
Laser Overcurrent Fault Indicator (Enabled by Over_current_en)
Indicates That the Laser Bias Current Exceeded the Value Set in the IB_LIMIT Register.
0: No Fault, 1: Overcurrent Fault Detected.
sn5100 5100fs
42
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