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參數(shù)資料
| 型號： | AK2572 |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 英文描述： | APC for Burst Mode Applicable Direct Modulation Laser Diode |
| 中文描述： | apc的突發(fā)模式適用的直接調(diào)制激光器 |
| 文件頁數(shù)： | 25/50頁 |
| 文件大小： | 463K |
| 代理商： | AK2572 |
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ASAHI KASEI
[AK2572]
-25-
< MS0290-E-01>
2004/8
5.
Burst Mode Operation
The AK2572 is put into Burst mode support operation by setting RE_BURST_SET
＝
“1”.
When the Burst mode operation is enabled, do not use APC_FB function. Control the LD current by APC_FF
function only (RE_APC_FF_SET
＝
“3”, RE_APC_FB_SET
＝
“0”), and OPTALM and CURRALM should not
be selected as the target alarm on TXFAULT-pin (RE_OPTALM_SET
＝
“0”, RE_CURRALM_SET
＝
“0”).
Figure 5-1
Burst Mode Operation
Burst Signal
(BURST-pin)
Burst ON
(Active)
Burst OFF
(Inactive)
EXTALM1
EXTALM2
TEMPALM
ON
ON
I-DAC1, I-DAC2, V-DAC3
ON
(Output Current / Voltage)
Temperature Detection
ON
ON
APC_FF Operation
ON
(Update Data)
Hold Data
R_DACx
(x=1~3)
Update Data
61ns [typ]
ON/OFF
ON
ON
ON
(Output Current / Voltage)
ON
(Update Data)
(1) Alarm mask function
EXTALM1 and EXTALM2 can be masked for 61 ns [Typ.] at the rising edge of Burst signal by
RE_BURST_ALM setting. By enabling this masking operation, EXTALM1 and EXTALM2 for
TXFAULT-pin output (Logical “OR” function of alarms set by EEPROM / Register) is masked but output to
status register R_TXFLT_ST is not masked and ALM detect result is always retained in that register.
(2) APC operation masking function
Updating APC_FF data (R_BIAS_FF, R_MOD_FF) and temperature detection by the On-chip temperature
sensor are always executed. DAC setting data (R_DACx [x
＝
1~3]) are updated during the Burst OFF.
During the Burst ON, DAC setting data are not updated but the updated data made during the previous
Burst OFF period is held.
5. 1
Power Leveling
［
1
］
In Power Leveling [1] mode, the data to be loaded to register (R_MOD_FF) from one of two patterns of the
Modulation current temperature compensation data which are retained in EEPROM is selected by Hardware
pin control (MOD_CTRL-pin) and it can be used as APC_FF data.
EXTALM2 / MOD_CTRL-pin becomes MOD_CTRL control pin when both RE_PWR_LVL1_SET and
RE_SFP_SET are set to “1”, and Power Leveling [1] function is available. EEPROM data is set to each DAC by
MOD_CTRL-pin as shown in Table 5-1.
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|---|---|
| AK2573A | 125M / 156M Laser Diode Driver + APC |
| AK2573AVB | 125M / 156M Laser Diode Driver + APC |
| AK2574 | 156M Laser Diode Driver + APC for Burst Mode |
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| AK2573A | 制造商:AKM 制造商全稱:AKM 功能描述:125M / 156M Laser Diode Driver + APC |
| AK2573AVB | 制造商:AKM 制造商全稱:AKM 功能描述:125M / 156M Laser Diode Driver + APC |
| AK2574 | 制造商:AKM 制造商全稱:AKM 功能描述:156M Laser Diode Driver + APC for Burst Mode |
| AK2574VB | 制造商:AKM 制造商全稱:AKM 功能描述:156M Laser Diode Driver + APC for Burst Mode |
| AK2581HB-AT | 制造商:ADDA Corporation 功能描述:AC-FAN, 254X89 MM, 115/60 VOLT 制造商:ADDA Corporation 功能描述:AXIAL FAN 254MM 115VAC 620mA 制造商:ADDA Corporation 功能描述:AXIAL FAN, 254MM, 115VAC, 620mA 制造商:ADDA Corporation 功能描述:AK Series 2100/2000 RPM 254 x 89 mm 115 V 680/630 CFM Ball Bearing AC Fan 制造商:ADDA Corporation 功能描述:AXIAL FAN, 254MM, 115VAC, 620mA; Frame Dimensions:254mm x 89mm; Supply Voltage:115VAC; Current Rating:620mA; Flow Rate - Imperial:630cu.ft/min; Flow Rate - Metric:19.244m /min; Noise Rating:62dBA; Bearing Type:Ball; Series:AK25489 ;RoHS Compliant: Yes 制造商:ADDA 功能描述:AK Series 2100/2000 RPM 254 x 89 mm 115 V 680/630 CFM Ball Bearing AC Fan |
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