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TZA3001U 데이터시트 PDF




NXP Semiconductors에서 제조한 전자 부품 TZA3001U은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


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부품번호 TZA3001U 기능
기능 SDH/SONET STM4/OC12 laser drivers
제조업체 NXP Semiconductors
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TZA3001U 데이터시트 를 다운로드하여 반도체의 전기적 특성과 매개변수에 대해 알아보세요.



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TZA3001U 데이터시트, 핀배열, 회로
INTEGRATED CIRCUITS
DATA SHEET
TZA3001AHL; TZA3001BHL;
TZA3001U
SDH/SONET STM4/OC12 laser
drivers
Preliminary specification
Supersedes data of 1997 Sep 08
File under Integrated Circuits, IC19
1999 Aug 24




TZA3001U pdf, 반도체, 판매, 대치품
Philips Semiconductors
SDH/SONET STM4/OC12 laser drivers
Preliminary specification
TZA3001AHL; TZA3001BHL;
TZA3001U
PINNING
SYMBOL
GND
MONIN
GND
IGM
TONE
PIN
TZA3001AHL TZA3001BHL
11
22
33
−−
44
TZERO
5
5
BGAP
VCC(G)
VCC(G)
GND
GND
VCC(B)
VCC(B)
GND
LAQ
LA
GND
BIAS
GND
GND
GND
ALARMHI
VCC(R)
VCC(R)
DLOOP
VCC(R)
DLOOPQ
VCC(R)
ALARMLO
VCC(R)
ONE
ZERO
GND
GND
ALARM
ENL
VCC(R)
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
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27
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
PAD
TZA3001U
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
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DESCRIPTION
ground
monitor photodiode current input
ground
not used; leave unbonded
connection for external capacitor used to set optical
ONE control loop time constant (optional)
connection for external capacitor used to set optical
ZERO control loop time constant (optional)
connection for external band gap decoupling capacitor
supply voltage (green domain)
supply voltage (green domain)
ground
ground
supply voltage (blue domain)
supply voltage (blue domain)
ground
laser modulation output inverted
laser modulation output
ground
laser bias current output
ground
ground
ground
maximum bias current alarm reference level input
supply voltage (red domain)
supply voltage (red domain)
loop mode data input
supply voltage (red domain)
loop mode data input inverted
supply voltage (red domain)
minimum bias current alarm reference level input
supply voltage (red domain)
optical ONE reference level input
optical ZERO reference level input
ground
ground
alarm output
loop mode enable input
supply voltage (red domain)
1999 Aug 24
4

4페이지










TZA3001U 전자부품, 판매, 대치품
Philips Semiconductors
SDH/SONET STM4/OC12 laser drivers
Preliminary specification
TZA3001AHL; TZA3001BHL;
TZA3001U
DC reference currents are applied to pins ZERO and ONE
to set the MPD reference levels for laser LOW and laser
HIGH. A resistor connected between pin ZERO and VCC(R)
and a resistor connected between pin ONE and VCC(R) is
sufficient, but current DACs can also be used.
The voltages on pins ZERO and ONE are held constant at
a level of 1.5 V below VCC(R). The reference current
applied to pin ZERO is multiplied by 4 and the reference
current flowing into pin ONE is multiplied internally by 16.
The reference current and the resistor for the optical ONE
regulation loop (modulation current control) can be
calculated using the following formulae:
IONE = 1--1--6-- × IMPD (ONE)
[A]
(1)
RONE = I--1O----.N-5--E-- = -I-M----P---D-2---4-(-O----N---E---)
[Ω]
(2)
The reference current and resistor for the optical ZERO
regulation loop (bias current control) can be calculated
using the following formulae:
IZERO = 14-- × IMPD (ZERO)
[A]
(3)
RZERO = I--Z--1-E--.-R-5--O-- = I--M----P---D----6-(-Z---E---R---O----)
[Ω]
(4)
In these formulae, IMPD(ONE) and IMPD(ZERO) represent the
monitor photodiode current during an optical ONE and an
optical ZERO, respectively.
Example: A laser is operating at optical output power
levels of 0.3 mW for laser HIGH and 0.03 mW for laser
LOW (extinction ratio of 10 dB). Suppose the
corresponding MPD currents for this type of laser are
260 and 30 µA, respectively.
In this example the reference current is
IONE = 1--1--6-- × 260 = 16.25 µA and flows into pin ONE.
This current can be set using a current source or simply by
a resistor of the appropriate value connected between
pin ONE and VCC(R). In this example the resistor would be
RONE = 1----16---..--52---5---- = 92.3 k
The reference current at pin ZERO in this example is
IZERO = 14-- × 30 = 7.˙5 µA and can be set using a resistor
RZERO = 17----..--55--- = 200 k
It should be noted that the MPD current is stabilized, rather
than the actual laser optical output power. Deviations
between optical output power and MPD current, known as
‘tracking errors’, cannot be corrected.
Designing the modulation and bias loop
The optical ONE and ZERO regulation loop time constants
are determined by on-chip capacitances. If the resulting
time constants are found to be too small in a specific
application, they can be increased by connecting external
capacitors to pins TZERO and TONE, respectively.
The optical ONE loop time constant and bandwidth can be
estimated using the following formulae:
τONE = (40 × 1012 + CTONE) × -8-η--0--L---×A---S--1-E--0-R--3-
[s] (5)
BONE = 2----π-----×---1--τ---O---N----E-
[ Hz ]
(6)
BONE
=
----------------------------------------η----L---A---S---E---R-----------------------------------------
2π × (40 × 1012 + CTONE) × 80 × 103
The optical ZERO loop time constant and bandwidth can
be estimated using the following formulae:
τZERO = (40 × 1012 + CTZERO) × 5--η--0--L---×A---S--1-E--0-R--3-
[s] (7)
BZERO = 2----π-----×----1-τ---Z---E---R---O--
[ Hz ]
(8)
BZERO
=
------------------------------------------η---L---A---S---E---R-------------------------------------------
2π × (40 × 1012 + CTZERO) × 50 × 103
The term ηLASER (dimensionless) in the above formulae is
the product of the two terms:
• ηEO is the electro-optical efficiency which accounts for
the steepness of the laser slope. It is the amount of the
extra optical output power in W/A of modulation current
optical output power.
R is the monitor photodiode responsivity. It is the
amount of the extra monitor photodiode current in A/W
optical output power.
1999 Aug 24
7

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