tza3047a NXP Semiconductors, tza3047a Datasheet - Page 19

• Manufacturer Part Number: tza3047a
• Description: 30 Mbits/s Up To 1.25 Gbits/s Laser Drivers
• Manufacturer: NXP Semiconductors

Philips Semiconductors
12.3
A simplified application using the TZA3047B with dual-loop control and with a DC-coupled laser at 3.3 V or 5 V laser
voltage is illustrated in Fig.8. The average power level and the extinction ratio are determined by the resistors R
R
The open-drain outputs ALOP and ALMON are short-circuited with pin ENABLE causing an active alarm to disable the
bias and modulation current sources. The ALRESET input will reset the alarm latches and enable normal operation.
2003 Jun 05
handbook, full pagewidth
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30 Mbits/s up to 1.25 Gbits/s laser drivers
. The MODOUT and BIASOUT outputs are connected to the MODIN and the BIASIN inputs respectively.
TZA3047B with dual-loop control
3.3 V
3.3 V
ALRESET
V CCA
V CCD
TEST
DINQ
CINQ
GND
DIN
CIN
Fig.8 TZA3047B with DC-coupled laser and dual-loop control.
1
2
3
4
5
6
7
8
9
10
32
11
31
12
30
TZA3047B
29
13
14
28
3.3 V or 5 V
27
15
19
16
26
25
24
23
22
21
20
19
18
17
MDB316
BIAS
GND
LA
LA
LAQ
LAQ
GND
TZA3047A; TZA3047B
laser with
monitor diode
Product specification
AVR
and