MAX3262 Maxim, MAX3262 Datasheet - Page 4

• Manufacturer Part Number: MAX3262
• Description: Single +5V / Fully Integrated / 155Mbps Laser Diode Driver
• Manufacturer: Maxim

Single +5V, Fully Integrated,
155Mbps Laser Diode Driver
4
______________________________________________________________Pin Description
17, 19, 21
_______________________________________________________________________________________
PIN
4, 7
10
11
12
13
14
15
16
18
20
22
23
24
1
2
3
5
6
8
9
IBIASOUT
SLWSTRT
IMODSET
IBIASSET
FAILOUT
IBIASFB
IPINSET
OSADJ
VREF2
VREF1
NAME
GNDB
GNDA
VCCB
OUT+
VCCA
ENB+
VIN+
ENB-
OUT-
VIN-
IPIN
Temperature-Compensated Reference Output. VREF2 is internally connected to VREF1.
Monitor Photodiode Programming Input. Connect INPINSET to VREF1 or VREF2 through a
resistor to set the monitor current when using automatic power control (see Typical Operating
Characteristics ).
Failout Output. Active-low, open-collector TTL output indicates if automatic power-control
loop is out of regulation due to insufficient monitor-diode current (when VPIN is below the
2.6V threshold). Connect FAILOUT to VCC through a 2.7kΩ pull-up resistor.
Ground for Voltage Reference and Automatic Power-Control Circuitry
Noninverting PECL Data Input
Inverting PECL Data Input
+5V Supply Voltage for Voltage Reference and Automatic Power-Control Circuitry. Connect
VCCB to the same potential as VCCA, but provide separate bypassing for VCCA and VCCB.
Inverting Enable TTL Input. Output currents are enabled only when ENB+ is high and ENB- is low.
Noninverting Enable TTL Input. Output currents are enabled only when ENB+ is high and
ENB- is low.
Temperature-Compensated Reference Output. VREF1 is internally connected to VREF2.
Overshoot-Adjust Input. Connect to internal voltage reference through a resistor to adjust the
overshoot of the modulation output signal (see Typical Operating Characteristics ).
Bias-Feedback Current Output. Output from automatic power-control circuit. Connect to
I
Laser Bias Current-Programming Input. Connect to internal voltage reference through a resis-
tor to set bias current (see Typical Operating Characteristics ).
I
Laser Modulation Current-Programming Input. Connect to internal voltage reference through
a resistor to set modulation current (see Typical Operating Characteristics ).
I
Laser Bias Current Output. Connect to laser cathode through an R-L filter network (see the
Bias Network Compensation section).
Ground for Bias and Modulation Current Drivers
Modulation Output. When VIN+ is high and VIN- is low, OUT- sinks I
Modulation Output. When VIN+ is low and VIN- is high, OUT+ sinks I
+5V Supply Voltage for Bias and Modulation Current Drivers. Connect VCCA to the same
potential as VCCB, but provide separate bypassing for VCCA and VCCB.
Monitor Photodiode Current Input. Connect IPIN to photodiode’s anode.
Slow-Start Capacitor Input. Connect capacitor to ground or leave unconnected to set start-up
time, t
BIASSET
BIASOUT
MOD
= 20 x I
STARTUP
when using APC.
= 40 x (I
MODSET
= 25.4kΩ (C
BIASSET
.
+ I
SLWSTRT
BIASFB
).
2pF).
FUNCTION
MOD
MOD
.
.