TZA3031U Philips Semiconductors, TZA3031U Datasheet - Page 12

• Manufacturer Part Number: TZA3031U
• Description: SDH/SONET STM1/OC3 laser drivers
• Manufacturer: Philips Semiconductors

Philips Semiconductors
Notes
1. Remarks to the supply current:
2. Remarks to the power dissipation:
3. The minimum value of the capacitance on pin MONIN is required to prevent instability.
4. The reference currents can be set using a resistor connected between pins ONE or ZERO and V
5. The specified transconductance is the ratio between the modulation current at pins LA or LAQ and the voltage at
1999 Aug 24
Laser modulation outputs: pins LA and LAQ
I
I
V
t
t
J
Bias current output: pin BIAS
I
I
t
V
Alarm threshold inputs: pin ALARMHI and ALARMLO (on TZA3031AHL)
I
V
I
V
O
O(off)
r
f
O
O(off)
res(off)
ref(ALARMLO)
ref(ALARMHI)
o(p-p)
O
O
ref(ALARMLO)
ref(ALARMHI)
SYMBOL
SDH/SONET STM1/OC3 laser drivers
a) The value for I
b) Typical value for I
c) The maximum value of I
a) The value for P
b) The typical value for P
c) The maximum value for P
(see Section “Automatic laser control”). The corresponding ZERO level MPD current range is from 24 to 260 A.
The ONE level MPD current range is from 96 to 1040 A.
pin TONE, under small signal conditions.
V
V
BIAS
BIAS
= 1 V and typical process parameters.
= 1 V and worst case process parameters.
modulation output current
output current during laser
shutdown
output voltage
current rise time
current fall time
intrinsic electrical output jitter
(peak-to-peak value)
output current
output current during laser
shutdown
response time after laser
shutdown
output voltage
threshold reference current on
pin ALARMLO
optical reference voltage on
pin ALARMLO
threshold reference current on
pin ALARMHI
optical reference voltage on
pin ALARMHI
CC
tot
PARAMETER
does not include the modulation and bias currents through pins LA, LAQ and BIAS.
CC
includes the modulation and bias currents through pins LA, LAQ and BIAS.
refers to, but does not include, I
tot
CC
is the on-chip dissipation with I
tot
refers to, but does not include, I
is the on-chip dissipation with I
note 7
note 8
note 8
note 9
note 10
I
note 11
lower alarm; note 12 6
referenced to V
higher alarm;
note 12
referenced to V
BIAS
CONDITIONS
= 90 mA;
12
MOD
MOD
= 30 mA and I
MOD
CC(R)
CC(R)
MOD
= 30 mA and V
= 60 mA and V
= 60 mA and I
3
2
2.5
1
6
TZA3031AHL; TZA3031BHL;
1.55
1.55
MIN.
BIAS
LA
= 45 mA.
LA
BIAS
= V
= V
120
120
TYP.
1.5
1.5
LAQ
= 90 mA.
LAQ
= 2 V, I
= 2 V, I
Preliminary specification
60
10
5
300
300
50
90
10
1
5
65
65
1.45
1.45
TZA3031U
MAX.
BIAS
CC
BIAS
= 45 mA and
= 90 mA and
mA
V
ps
ps
mUI
mA
V
V
V
UNIT
A
A
s
A
A