MAX3967AETG+ Maxim Integrated Products, MAX3967AETG+ Datasheet

IC LED DRIVER 24-TQFN

MAX3967AETG+

Manufacturer Part Number
MAX3967AETG+
Description
IC LED DRIVER 24-TQFN
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX3967AETG+

Constant Current
Yes
Number Of Outputs
2
Internal Driver
Yes
Type - Primary
General Purpose
Voltage - Supply
2.97 V ~ 5.5 V
Mounting Type
Surface Mount
Package / Case
24-TQFN Exposed Pad
Operating Temperature
-40°C ~ 85°C
Current - Output / Channel
100mA
Internal Switch(s)
Yes
Number Of Segments
1
Operating Supply Voltage
2.97 V to 5.5 V
Maximum Supply Current
39 mA
Maximum Power Dissipation
1354 mW
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Output
-
Frequency
-
Efficiency
-
Topology
-
Lead Free Status / Rohs Status
 Details
The MAX3967A is a programmable LED driver for fiber
optic transmitters operating at data rates up to
270Mbps. The circuit contains a high-speed current dri-
ver with programmable temperature coefficient (temp-
co), adjustments for LED prebias voltage, and a disable
feature. The circuit accepts PECL data inputs, and
operates from a single +2.97V to +5.5V power supply.
The SFP LED driver can switch up to 100mA into typical
high-speed light-emitting diodes. As temperature
increases, the device’s modulation current increases
with a tempco that is programmable from 2500ppm/°C
to 12,000ppm/°C. The modulation current is pro-
grammed with a single external resistor.
The MAX3967A’s LED prebias voltage is programmable
from 400mV to 925mV. The prebias circuit produces
peaking current, which improves the LED switching
speed.
Complementary current outputs help to maintain a con-
stant supply current, reducing EMI and supply noise
generated by the transmitter module. The MAX3967A is
available in die form, or in a 4mm x 4mm, 24-pin thin
QFN package.
19-3629; Rev 0; 3/05
Typical Operating Circuits appear at end of data sheet.
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Multimode LED Transmitters
Fast Ethernet/FDDI
155Mbps LAN ATM Transceivers
ESCON Receivers
SFP Transceivers
________________________________________________________________ Maxim Integrated Products
General Description
Applications
270Mbps SFP LED Driver
♦ TX_DISABLE for SFP Compatibility
♦ Single +2.97V to +5.5V Power Supply
♦ Adjustable Temperature Compensation
♦ Adjustable Modulation Current
♦ Complementary Output Reduces Supply Noise
♦ Programmable LED Prebias Voltage
♦ Available in 24-Pin Thin QFN or Die
*Dice are tested and guaranteed only at T
MAX3967AETG
MAX3967AE/D
TOP VIEW
TX_DISABLE
PART
TCMIN
V
IN+
V
IN-
CC
EE
THE EXPOSED PAD MUST BE CONNECTED TO GROUND FOR
PROPER THERMAL AND ELECTRICAL PERFORMANCE
19
20
21
22
23
24
18
1
THIN QFN (4mm x 4mm)
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
17
Ordering Information
2
MAX3967A
16
3
Pin Configuration
15
4
14
A
5
= +25°C.
PIN-PACKAGE
24 Thin QFN
Dice*
13
Features
6
12
11
10
9
8
7
N.C.
OUT-
OUT-
OUT+
OUT+
V
EEOUT
1

Related parts for MAX3967AETG+

MAX3967AETG+ Summary of contents

Page 1

... LAN ATM Transceivers ESCON Receivers SFP Transceivers Typical Operating Circuits appear at end of data sheet. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 270Mbps SFP LED Driver ♦ TX_DISABLE for SFP Compatibility ♦ ...

Page 2

SFP LED Driver ABSOLUTE MAXIMUM RATINGS Supply Voltage CCOUT ( 0V) ..............................................-0.5V to +7V EE EEOUT Current into OUT+, OUT- ................................-40mA to +160mA Differential Output Voltage (OUT+ to OUT-) .........-3.3V ...

Page 3

AC ELECTRICAL CHARACTERISTICS (Load as specified in Figure 1, unless otherwise noted. V +85°C. Input data shaped by 470MHz 4-pole filter, PB1 = PB2 = V to TCMIN +25°C.) (Note 4) A PARAMETER SYMBOL Data Input Range Output-Current ...

Page 4

SFP LED Driver (MAX3967AETG in Maxim evaluation board, V 1kΩ +25°C, unless otherwise noted.) A SUPPLY CURRENT vs. TEMPERATURE 40 EXCLUDES CURRENT INTO OUT+ AND OUT 5. ...

Page 5

Maxim evaluation board, V 1kΩ +25°C, unless otherwise noted.) A EYE DIAGRAM (OPTICAL) 155Mbps MAX3967 toc10 1ns/div = +85 ° C, RECEIVER BW = 200MHz 5.5V -17.1dBm, PATTERN = ...

Page 6

SFP LED Driver PIN NAME 1 TCNOM Shorting TC to TCNOM provides a modulation tempco of approximately 3600ppm/°C. A resistor ( current. Leaving PB1, PB2, PB3 Programs the Prebias Voltage at the OUT+ ...

Page 7

INPUT BUFFER IN+ IN- REFERENCE-VOLTAGE GENERATOR 1.2V V TEMP TCMIN TCNOM TC Figure 2. Functional Diagram Modulation-Current Generator The modulation-current generator circuit provides con- trol of the modulation-current amplitude. This amplitude is determined by the voltage at the MODSET pin ...

Page 8

SFP LED Driver Table 1. LED Prebias Voltage PB1 PB2 PB3 Open Open Open V Open Open EE Open V Open Open EE EE Open Open V V Open V EE Open ...

Page 9

Input Terminations PECL OUTPUT 50Ω NON-PECL OUTPUT 3.3 82 130 5.0 68 180 SINGLE-ENDED TERMINATION IS SHOWN. IN- SHOULD BE TERMINATED SIMILARLY. Figure 3. Input ...

Page 10

SFP LED Driver 82Ω DIFFERENTIAL DATA C IN 120Ω +3.3V 82Ω DIFFERENTIAL DATA C IN 120Ω DIAGNOSTIC 10 ______________________________________________________________________________________ SFP TRANSMITTER +3.3V 10kΩ DISABLE TX_DISABLE +3.3V +3.3V 82Ω MAX3967A IN+ IN- PB1 PB2 ...

Page 11

SFF TRANSMITTER WITH DISABLE V CC DISABLE TX_DISABLE IN+ PECL DATA IN- MON PB1 PB2 PB3 TCNOM TCMIN *OPTIONAL COMPONENT SFF TRANSMITTER WITHOUT DISABLE V CC TX_DISABLE IN+ PECL DATA IN- MON PB1 PB2 PB3 TCNOM ______________________________________________________________________________________ 270Mbps SFP LED ...

Page 12

SFP LED Driver Chip Topography TX_DISABLE V IN+ IN- EE TCMIN TCNOM TC PB1 PB2 PB3 V EEOUT V EEOUT OUT+ OUT- (0, 0) OUT+ OUT- 1.21mm (48 mils) 12 ______________________________________________________________________________________ PAD PAD NAME NUMBER BP1 TCMIN BP2 TCNOM ...

Page 13

For the latest package outline information www.maxim-ic.com/packages.) PART PACKAGE TYPE 24 thin QFN MAX3967AETG (4mm x 4mm x 0.8mm) ______________________________________________________________________________________ 270Mbps SFP LED Driver ...

Page 14

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 14 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2005 Maxim Integrated Products ...

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