MAX3669ETG+T Maxim Integrated Products, MAX3669ETG+T Datasheet - Page 6

• Manufacturer Part Number: MAX3669ETG+T
• Description: IC LASR DRVR 622MBPS 5.5V 24TQFN
• Manufacturer: Maxim Integrated Products
• Type: Laser Diode Driver (Fiber Optic)r

Specifications of MAX3669ETG+T

• Data Rate: 622Mbps
• Number Of Channels: 1
• Voltage - Supply: 3.14 V ~ 5.5 V
• Current - Supply: 40mA
• Current - Modulation: 75mA
• Current - Bias: 80mA
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 24-TQFN Exposed Pad
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

+3.3V, 622Mbps SDH/SONET
Laser Driver with Current Monitors and APC
6
1, 13, 16,
4, 8, 11,
17, 22
TQFN
_______________________________________________________________________________________
19
10
12
14
15
18
20
21
23
24
EP
2
3
5
6
7
9
PIN
1, 2, 6, 15,
12, 13, 26,
17, 20, 24
21, 22, 30
5, 10, 14,
27, 28
TQFP
11
16
18
19
23
25
29
31
32
—
3
4
7
8
9
MODMON
BIASMON
BIASMAX
MODSET
ENABLE
APCSET
Exposed
DATA+
Paddle
NAME
DATA-
OUT+
CAPC
OUT-
GND
BIAS
FAIL
N.C.
V
MD
CC
Positive Supply Voltage
Positive PECL Data Input
Negative PECL Data Input
Ground
Sink Current Source. Proportional to the laser bias current.
Sink Current Source. Proportional to the laser modulation current.
TTL/CMOS Enable Input. High for normal operation, low to disable laser bias and
modulation currents. Internally pulled high.
TTL Output. Indicates APC failure when low. Internally pulled high through a 6kΩ resistor.
No Connection. Leave unconnected.
Laser Bias Current Output. Isolate from laser with a ferrite bead.
Positive Modulation Current Output. I
high. Connect this pad to AC-coupling network.
Negative Modulation Current Output. I
low. Connect this pad to V
Monitor Photodiode Connection. Connect this pad to the monitor photodiode anode.
A capacitor to ground is required to filter high-speed AC monitor photocurrent.
APC Compensation Capacitor. A 0.1µF capacitor connected from this pad to ground
controls the dominant pole of the APC feedback loop.
APC Set Resistor. A resistor connected from this pad to ground sets the desired average
optical power. The resulting current is equal to the desired DC monitor diode current.
Connect a 100kΩ resistor from this pad to ground if APC is not used.
Modulation Set Resistor. A resistor from this pad to ground sets the laser modulation
current.
Maximum Bias Set Resistor. A resistor from this pad to ground sets the maximum laser
bias current. The APC function can subtract from this maximum value but cannot add to
it. This resistor controls the bias-current level when the APC loop is not used.
The exposed paddle must be soldered to ground.
CC
through a 6.3Ω resistor.
MOD
MOD
FUNCTION
flows into this pad when the input signal is
flows into this pad when the input signal is
Pin Description