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TZA3011AVH/C2,551

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30
9397 750 14437 © Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet Rev. 06 — 20 January 2005 10 of 30
Philips Semiconductors
TZA3011A; TZA3011B
30 Mbit/s up to 3.2 Gbit/s A-rate laser drivers
The maximum allowable capacitive load on pins AVR, ER, BIASOUT and MODOUT is
100 pF.
7.6 Average loop control
The average power control loop maintains a constant average power level of the monitor
current over temperature and lifetime of the laser. The average loop control is activated by
short-circuiting pin ER to ground.
7.7 Direct current setting
The TZA3011 can also operate in open-loop mode with direct setting of the bias and
modulation currents. The bias and modulation current sources are transconductance
amplifiers and the output currents are determined by the BIASIN and MODIN voltages
respectively. The bias current source has a bipolar output stage with minimum output
capacitance for optimum RF performance.
7.8 Soft start
At power-up the bias and modulation current sources are released when V
CCA
> 2.7 V
and the reference voltage has reached the correct value of 1.2 V.
The control loop starts with minimum bias and modulation current at power-up and when
the device is enabled. The current levels increase until the MON input current matches the
programmed average level and, in the case of dual-loop control, the extinction ratio.
7.9 Alarm functions
The TZA3011 features two alarm functions for the detection of excessive laser operating
current and monitor diode current due to laser ageing, laser malfunctioning or a too high
laser temperature. The alarm threshold levels are programmed by a resistor or a current
source. In the TZA3011A, for the AC-coupled application, the operating current is equal to
the bias current. In the TZA3011B, for the DC-coupled application, the operating current
equals the bias current plus half of the modulation current.
7.10 Enable
A LOW-level on the enable input disables the bias and modulation current sources: the
laser is off. A HIGH-level on the enable input or an open enable input switches both
current sources on: the laser is operational.
7.11 Reference block
The reference voltage is derived from a band gap circuit and is available at pin RREF. An
accurate (1 %) 10 kΩ resistor has to be connected to pin RREF to provide the internal
reference current. The maximum capacitive load on pin RREF is 100 pF.
The reference voltage on the setting pins (MAXOP, MAXMON, PWA, ER and AVR) is
buffered and derived from the band gap voltage.
The output voltage on pin VTEMP reflects the junction temperature of the TZA3011, the
temperature coefficient of V
VTEMP
equals −2.2 mV/K.
9397 750 14437 © Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet Rev. 06 — 20 January 2005 11 of 30
Philips Semiconductors
TZA3011A; TZA3011B
30 Mbit/s up to 3.2 Gbit/s A-rate laser drivers
8. Limiting values
Table 5: Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134). All voltages are referenced
to ground; positive currents flow into the IC.
Symbol Parameter Conditions Min Max Unit
V
CCD
digital supply voltage −0.5 +3.5 V
V
CCA
analog supply voltage −0.5 +3.5 V
V
CCO
output stage supply voltage 3.3 V laser supply −0.5 +3.5 V
5 V laser supply
(TZA3011B only)
−0.5 +5.3 V
V
o(LA)
output voltage at pin LA TZA3011A;
V
CCO
= 3.3 V
1.2 4.5 V
TZA3011B;
V
CCO
= 3.3 V
0.8 4.1 V
TZA3011B;
V
CCO
=5V
1.2 4.5 V
V
o(LAQ)
output voltage at pin LAQ TZA3011A;
V
CCO
= 3.3 V
1.8 4.5 V
TZA3011B;
V
CCO
= 3.3 V
1.6 4.5 V
TZA3011B;
V
CCO
=5V
2.0 5.2 V
V
BIAS
bias voltage TZA3011A;
V
CCO
= 3.3 V
0.4 3.6 V
TZA3011B;
V
CCO
= 3.3 V
0.4 3.6 V
TZA3011B;
V
CCO
=5V
0.8 4.1 V
V
n
voltage on other input and
output pins
analog inputs and outputs −0.5 V
CCA
+
0.5
V
digital inputs and outputs −0.5 V
CCD
+
0.5
V
I
n
input current on pins
MAXOP, MAXMON,
RREF, PWA, ER and AVR
−1.0 0 mA
VTEMP, BIASOUT and
MODOUT
−1.0 +1.0 mA
ALOP, ALMON and MON 0 5.0 mA
T
amb
ambient temperature −40 +85 °C
T
j
junction temperature −40 +125 °C
T
stg
storage temperature −65 +150 °C
9397 750 14437 © Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet Rev. 06 — 20 January 2005 12 of 30
Philips Semiconductors
TZA3011A; TZA3011B
30 Mbit/s up to 3.2 Gbit/s A-rate laser drivers
9. Thermal characteristics
10. Static characteristics
Table 6: Thermal characteristics
In compliance with JEDEC standards JESD51-5 and JESD51-7.
Symbol Parameter Conditions Typ Unit
R
th(j-a)
thermal resistance
from junction to
ambient
4 layer printed circuit board in still air with 9 plated vias connected with
the heatsink and the first ground plane in the printed circuit board
35 K/W
HBCC32 die pad soldered to printed circuit board 60 K/W
Table 7: Characteristics
T
amb
=
−
40
°
C to +85
°
C; R
th(j-a)
= 35 K/W; P
tot
= 400 mW; V
CCA
= 3.14 V to 3.47 V; V
CCD
= 3.14 V to 3.47 V; V
CCO
= 3.14 V
to 3.47 V; R
AVR
= 7.5 k
Ω
;R
ER
=62k
Ω
;R
MODIN
= 6.2 k
Ω
;R
BIASIN
= 6.8 k
Ω
;R
PWA
=10k
Ω
;R
RREF
=10k
Ω
;R
MAXMON
=13k
Ω
;
R
MAXOP
=20k
Ω
; positive currents flow into the IC; all voltages are referenced to ground; unless otherwise specified.
Symbol Parameter Conditions Min Typ Max Unit
Supplies: pins V
CCA
,V
CCD
and V
CCO
V
CCA
analog supply voltage 3.14 3.3 3.47 V
V
CCD
digital supply voltage 3.14 3.3 3.47 V
V
CCO
RF output supply voltage 3.3 V laser supply 3.14 3.3 3.47 V
5 V laser supply 4.75 5.0 5.25 V
I
CCA
analog supply current 30 40 50 mA
I
CCD
digital supply current 35 45 55 mA
I
CCO
RF output supply current pins LA and LAQ open-circuit
3.3 V laser supply 8 15 25 mA
5 V laser supply - 20 - mA
P
core
core power dissipation core excluding output currents I
o(LA)
,
I
o(LAQ)
and I
BIAS
; PWA and retiming
off
- 264 - mW
P
tot
total power dissipation V
BIAS
= 3.3 V; I
BIAS
=20mA;
I
mod
=16mA
[1]
330 400 500 mW
Data and clock inputs: pins DIN and CIN
V
i(p-p)
input voltage swing
(peak-to-peak value)
V
i(DIN)
=(V
CCD
− 2V)toV
CCD
;
V
i(CIN)
=(V
CCD
− 2V)toV
CCD
100 - 1000 mV
V
int(cm)
internal common mode
voltage
AC-coupled inputs - V
CCD
− 1.32 - V
V
IO
input offset voltage
[2]
−10 0 +10 mV
Z
i(dif)
differential input impedance 80 100 125 Ω
Z
i(cm)
common mode input
impedance
810 13kΩ
V
i(CIN)(dis)
input voltage for disabled
retiming
V
CIN
=V
CINQ
- - 0.3 V
Monitor photodiode input: pin MON
V
i(MON)
input voltage I
MON
=50µA to 2500 µA 0.9 1.1 1.3 V
Z
i(MON)
input impedance I
MON
= 50 µA to 2500 µA - 27 - Ω
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30

TZA3011AVH/C2,551

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Buy TZA3011AVH/C2,551
Manufacturer:
NXP Semiconductors
Description:
IC LASER DRIVER 3.2GBPS 32-HBCC
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New from this manufacturer.
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