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參數資料
| 型號： | TZA3041U |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 其它接口 |
| 英文描述： | Gigabit Ethernet/Fibre Channel laser drivers |
| 中文描述： | SPECIALTY INTERFACE CIRCUIT, UUC40 |
| 封裝： | 2 X 2 X 0.38 MM, DIE-40 |
| 文件頁數： | 15/32頁 |
| 文件大小： | 153K |
| 代理商： | TZA3041U |
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2002 Aug 13
15
Philips Semiconductors
Product specification
Gigabit Ethernet/Fibre Channel laser
drivers
TZA3041AHL; TZA3041BHL;
TZA3041U
Loop mode for TZA3041BHL
The loop mode allows the total system application to be
tested. It allows for uninhibited optical transmission
through the fibre front-end (from the MPD through the
transimpedance stage and the data and clock recovery
unit, to the laser driver and via the laser back to the fibre).
Note that the optical receiver used in conjunction with the
TZA3041BHL must have a loop mode output in order to
complete the test loop.
The loop mode is selected by a HIGH level on pin ENL.
By default, pin ENL is pulled to a LOW level by a 25 k
pull-down resistor (see Fig.16).
Power supply connections
Refer to application diagrams Figs 18 and 19. Three
separate supply domains (labelled V
CC(G)
, V
CC(B)
, and
V
CC(R)
) provide isolation between the MPD current input,
the high-current outputs, and the PECL or CML inputs.
Each supply domain should be connected to a central V
CC
viaseparatefiltersasshownin Figs 18 and 19.
Allsupply
pins must be connected
. The voltage supply levels
should be equal to, and in accordance with, the values
specified in Chapter “Characteristics”.
To maximize power supply isolation, the cathode of the
MPD should be connected to V
CC(G)
and the anode of the
laser diode should be connected to V
CC(B)
. It is
recommended that the laser diode anode is also
connected to a separate decoupling capacitor C9.
Generally, the inverted laser modulation output (pin LAQ)
is not used. To correctly balance the output stage, an
equalization network (Z1) with an impedance comparable
to the laser diode is connected between pin LAQ and
V
CC(B)
.
All external components should be surface mounted
devices, preferably of size 0603 or smaller.
The components must be mounted as close to the IC as
possible.
It is especially recommended to mount the following
components very close to the IC:
Power supply decoupling capacitors C2, C3 and C4
Inputmatchingnetworkonpins DIN,DINQ,DLOOPand
DLOOPQ
Capacitor C5 on pin MONIN
Output matching network Z1 at the unused output
The laser.
Bare die ground
In addition to the separate V
CC
domains, the bare die
contains three corresponding ground (GND) domains.
Isolation between the GND domains is limited due to the
finite substrate conductance.
Mount the die preferably on a large and highly conductive
grounded die pad.
All GND pads must be bonded to the
die pad.
The external ground is thus ideally combined with
the die ground to avoid ground bounce problems.
Layout recommendations
Layout recommendations for the TZA3041AHL and
TZA3041BHL can be found in application note “AN98090
Fiber optic transceiverboard STM1/4/8, OC3,12,24,
FC/GE”
handbook, halfpage
MGS912
25 k
VCC(R)
GND
ENL
600
Fig.16 ENL input.
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相關代理商/技術參數 |
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| TZA3043 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Gigabit Ethernet/Fibre Channel transimpedance amplifier |
| TZA3043B | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Gigabit Ethernet/Fibre Channel transimpedance amplifier |
| TZA3043BT | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Gigabit Ethernet/Fibre Channel transimpedance amplifier |
| TZA3043BU | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Gigabit Ethernet/Fibre Channel transimpedance amplifier |
| TZA3043T | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Gigabit Ethernet/Fibre Channel transimpedance amplifier |
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