参数资料
型号: LTC5100EUF#TR
厂商: Linear Technology
文件页数: 27/52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
LTC5100
OPERATIO
by an on-chip temperature sensor or by an external
microprocessor, according to the setting of Ext_temp_en.
The temperature compensated expression for Ib_set is
given by:
TRANSMIT ENABLE, FAULT DETECTION
AND EYE SAFETY
The LTC5100 is compatible with the Gigabit Interface
Converter (GBIC) specification, but includes additional
? Ib _ tc 2 ? 2 – 18 ? ? T 2 ?
Ib _ set = Ib _ nom ? ? ?
? + Ib _ tc 1 ? 2 – 13 ? ? T + 1 ?
(29)
features and safety interlocks. Figure 27 shows the state
diagram for enabling the transmitter and detecting faults.
The EN pin and Soft_en control bit enable and disable the
Ib_tc1 and Ib_tc2 are the first and second order tempera-
ture coefficients for the laser bias current.
POWER ON RESET OR
Operating_mode = 0
transmitter. The EN pin may be programmed for active
high or active low operation with the En_polarity bit.
1
READ
EEPROM
SUCCEEDED OR
Operating_mode = 1
2
READY
(DISABLED)
ENABLE
4
SETTLING
TIMEOUT
FAILED
Mem_load_error = 1
Transmitter_enabled = 0
ENABLE
FAULT DETECTION DISABLED
3
WAIT
64ms
Operating_mode = 1
(ENABLED) Transmitter_enabled = 1
100ms
ENABLE AND
Rep_flt_inhibit = 0
ENABLE AND
TIMEOUT
Rapid_restart_en = 0
5
SETTLED
(ENABLED)
ENABLE AND
Rapid_restart_en = 1
FAULT
FAULT DETECTION ENABLED
Transmit_ready = 1
8 FAULT PIN ASSERTED
FAULTED Transmitter_enabled = 0
(DISABLED) Transmit_ready = 0
Faulted = 1
ENABLE AND
Rep_flt_inhibit = 1
6
READY
(SETTLED
Transmitter_enabled = 0
9
READY Faulted = 0
(DISABLED) Faulted_once = 1
AND
DISABLED)
Transmit_ready = 0
ENABLE
ENABLE
ENABLE
40ms
7
ENABLE
10
SETTLING
(ENABLED)
FAULT DETECTION DISABLED
Transmitter_enabled = 1
TIMEOUT
SETTLING
(ENABLED)
FAULT DETECTION DISABLED
Transmit_ready = 1
25ms
TIMEOUT
11
100ms
TIMEOUT
FAULT DETECTION ENABLED
SETTLING
Transmit_ready = 1
(ENABLED)
Faulted_once = 0
FAULT
ENABLE = EN AND Soft_en
FAULT = Over_current OR
12
POWER ON RESET
Over_power OR
Under_power
FAULTED
TWICE
(DISABLED) Faulted = 1
5100 F27
Faulted_once = 1
Faulted_twice = 1
Figure 27. State Diagram for Transmitter Enable and Fault Detection
sn5100 5100fs
27
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