MAX3795ETG Maxim Integrated Products, MAX3795ETG Datasheet - Page 8
MAX3795ETG
Manufacturer Part Number
MAX3795ETG
Description
Laser Driver 1Gbps to 4.25Gbps Mu ltirate VCSEL Driver
Manufacturer
Maxim Integrated Products
Type
Transmitterr
Datasheet
1.MAX3795ETG.pdf
(15 pages)
Specifications of MAX3795ETG
Operating Supply Voltage
3.3 V
Package / Case
TQFN-24 EP
Minimum Operating Temperature
- 40 C
Mounting Style
SMD/SMT
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MAX3795ETG+T
Manufacturer:
MAXIM/美信
Quantity:
20 000
1Gbps to 4.25Gbps Multirate VCSEL Driver
with Diagnostic Monitors
8
1, 10, 13
7, 16, 20
_______________________________________________________________________________________
PIN
EP
11
12
14
15
17
18
19
21
22
23
24
2
3
4
5
6
8
9
Exposed Pad
TX_DISABLE
SQUELCH
BIASMON
PWRMON
PEAKSET
MODSET
BIASSET
FAULT
NAME
COMP
OUT+
OUT-
GND
BIAS
V
TC1
TC2
REF
IN+
MD
IN-
CC
Ground
Transmit Disable. Driver output is disabled when TX_DISABLE is high or left unconnected. The
driver output is enabled when the pin is asserted low.
Noninverted Data Input
Inverted Data Input
Fault Indicator. Open-drain output with ESD protection. FAULT is asserted high during a
fault condition.
Squelch Enable. Squelch is enabled when the pin is set high. Squelch is disabled when the pin is
set low or left open.
+3.3V Supply Voltage
Temperature Compensation Set Pin 1. A resistor placed between TC1 and TC2 (R
temperature coefficient of the laser modulation current.
Temperature Compensation Set Pin 2. A resistor placed between TC1 and TC2 (R
temperature coefficient of the laser modulation current.
Modulation Set. A resistor connected from MODSET to ground (R
modulation current amplitude.
Peaking Current Set. A resistor connected between PEAKSET and ground (R
peaking current amplitude. To disable peaking, leave PEAKSET open.
Inverted Modulation Current Output
Noninverted Modulation Current Output
Bias-Current Set. When a closed-loop configuration is used, connect a 1.7kΩ resistor between
ground and BIASSET to program the maximum bias current. When an open configuration is used,
connect a resistor between BIASSET and ground (R
Bias-Current Output
Bias-Current Monitor. The output of BIASMON is a sourced current proportional to the bias current.
A resistor connected between BIASMON and ground (R
referenced bias monitor.
Compensation Pin. A capacitor between COMP and MD compensates the APC. A typical value of
0.047µF is recommended. For open-loop configuration, short the COMP pin to GND to deactivate
the APC circuit.
Monitor Diode Connection
Refer ence P i n. Refer ence m oni tor used for AP C . A r esi stor b etw een RE F and M D ( R
the p hotom oni tor cur r ent w hen the AP C l oop i s cl osed .
Average Power Monitor. The pin is used to monitor the transmit optical power. For open-loop
configuration, connect PWRMON to GND.
Ground. Must be soldered to the circuit board ground for proper thermal and electrical
performance. See the Layout Considerations section.
FUNCTION
BIASSET
BIASMON
) to program the VCSEL bias current.
) can be used to form a ground-
MODSET
) programs the desired
Pin Description
PEAKSET
P WRS E T
TC
TC
) programs the
) programs the
) programs the
) p r og r am s