Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.COM

X  

Preview PDF Download HTML

MAX3748 Datasheet(PDF) 6 Page - Maxim Integrated Products

Part No. MAX3748
Description  Compact 155Mbps to 3.2Gbps Limiting Amplifier
Download  11 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
Logo 

MAX3748 Datasheet(HTML) 6 Page - Maxim Integrated Products

Zoom Inzoom in Zoom Outzoom out
 6 / 11 page
background image
Detailed Description
The limiting amplifier consists of an input buffer, a multi-
stage amplifier, offset correction circuitry, an output
buffer, power-detection circuitry, and signal-detect cir-
cuitry (see Functional Diagram).
Input Buffer
The input buffer is shown in Figure 3. It provides 50
termination for each input signal IN+ and IN-. The
MAX3748/MAX3748A can be DC- or AC-coupled to a
TIA (TIA output offset degrades receiver performance if
DC-coupled). The CML input buffer is optimized for the
MAX3744 TIA.
Gain Stage
The high-bandwidth gain stage provides approximately
53dB of gain.
Compact 155Mbps to 3.2Gbps
Limiting Amplifier
6
_______________________________________________________________________________________
Pin Description
PIN
NAME
FUNCTION
1, 4, 12
VCC
Supply Voltage
2
IN+
Noninverted Input Signal, CML
3
IN-
Inverted Input Signal, CML
5TH
Loss-of-Signal Threshold Pin. Resistor to ground (RTH) sets the LOS threshold. Connecting this pin to
VCC disables the LOS circuitry and reduces power consumption.
6
DISABLE
Disable Input, CMOS/TTL. The data outputs are held static when this pin is asserted high. The LOS
function remains active when the outputs are disabled, CMOS. On the MAX3748, this pin does not
include ESD protection. If routed through the DS1858/DS1859 controller IC, no additional ESD protection
is required. On the MAX3748A, this pin has ESD protection.
7
LOS
Noninverted Loss-of-Signal Output. LOS is asserted high when the signal drops below the assert
threshold set by the TH input. The output is open collector (Figure 5). On the MAX3748, this pin does not
include ESD protection. If routed through the DS1858/DS1859 controller IC, no additional ESD protection
is required. On the MAX3748A, this pin has ESD protection.
8, 16
GND
Supply Ground
9
OUTPOL
Output Polarity Control Input. Connect to GND for an inversion of polarity through the limiting amplifier
and connect to VCC for normal operation.
10
OUT-
Inverted Data Output, CML
11
OUT+
Noninverted Data Output, CML
13
RSSI
Received-Signal-Strength Indicator. This current output can be used to obtain a ground-referenced
voltage proportional to photodiode current with the MAX3744 by connecting an external resistor between
this pin and GND.
14
CAZ2
Offset Correction Loop Capacitor Connection. A capacitor connected between this pin and CAZ1
extends the time constant of the offset correction loop. Typical value of CAZ is 0.1µF. The offset
correction is disabled when the CAZ1 and CAZ2 pins are shorted together.
15
CAZ1
Offset Correction Loop Capacitor Connection. A capacitor connected between this pin and CAZ2 extends
the time constant of the offset correction loop. Typical value of CAZ is 0.1µF. The offset correction is disabled
when the CAZ1 and CAZ2 pins are shorted together.
EP
Exposed
paddle
Connect the exposed paddle to board ground for optimal electrical and thermal performance.
VCC
ICC (SUPPLY CURRENT)
IOUT (CML
OUTPUT CURRENT)
50
RTH
50
MAX3748/
MAX3748A
Figure 1. Power-Supply Current Measurement


Html Pages

1  2  3  4  5  6  7  8  9  10  11 


Datasheet Download




Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ]  

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Alldatasheet API   |   Link Exchange   |   Manufacturer List
All Rights Reserved© Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn