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Maxim Integrated - Upstream CATV Amplifiers

Numéro de référence MAX3517EEP
Description Upstream CATV Amplifiers
Fabricant Maxim Integrated 
Logo Maxim Integrated 





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MAX3517EEP fiche technique
19-1826; Rev 2; 9/01
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Upstream CATV Amplifiers
General Description
The MAX3514/MAX3516/MAX3517 programmable-gain
amplifiers are designed for use in CATV upstream
applications. The MAX3514/MAX3517 drive up to
+61dBmV (QPSK) into a 75load when driven with a
+34dBmV nominal input signal. The MAX3516 drives
up to +64dBmV (QPSK). Both input and output ports
are differential, requiring that an external balun be used
at the output port. The variable gain feature provides
greater than 56dB of dynamic range, which is con-
trolled by an SPI™ 3-wire interface. Gain control is
available in 0.5dB steps. The devices operate over a
frequency range of 5MHz to 65MHz.
The MAX3514 is a pin-for-pin compatible upgrade for
the MAX3510. Like the MAX3510, the MAX3514 is inter-
nally matched for use with a 2:1 (voltage ratio) balun.
The MAX3517 utilizes an external output resistor for
greater load-matching flexibility, and offers the same
performance as the MAX3514. The MAX3516 is a high-
er power version of the MAX3514 with 3dB more gain
and output power capability, and is offered in a smaller
thermally enhanced TSSOP-EP package.
These devices operate from a single +5VDC supply and
draw 120mA during transmit (100% duty cycle,
+61dBmV out). The MAX3516 can be operated at up to
+9VDC supply for improved harmonic distortion perfor-
mance. The bias current is automatically adjusted based
on the output level to increase efficiency. Additionally,
the devices are shut off between bursts to minimize
noise and save power while still maintaining a match at
the output port. Shutdown mode disables all circuitry and
reduces current consumption to 10µA (typ).
The MAX3514/MAX3517 are available in a 20-pin QSOP
package and the MAX3516 is available in a 20-pin
TSSOP-EP package. All devices operate in the extend-
ed industrial temperature range (-40°C to +85°C).
________________________Applications
DOCSIS/EuroDOCSISand DVB Cable
Modems
OpenCableSet-Top Box
Telephony over Cable
CATV Status Monitor
Typical Operating Circuit appears at end of data sheet.
SPI is a trademark of Motorola Corp.
DOCSIS/EuroDOCSIS/OpenCable are trademarks of
CableLabs.
Features
o Accurate Gain Control
o Gain Programmable in 0.5dB Steps
o 56dB of Gain Control Range
o -55dBc Harmonic Distortion at 65MHz Input
o Low Burst On/Off Transient
o High Efficiency:
35mA at +34dBmV Out
8mA Transmit Disable Mode
Ordering Information
PART
MAX3514EEP
MAX3516EUP
MAX3517EEP
*Exposed paddle
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-
PACKAGE
20 QSOP
20 TSSOP-EP*
20 QSOP
Pin Configuration
TOP VIEW
GND 1
VCC 2
GND 3
GND 4
IN+ 5
IN- 6
GND 7
CS 8
SDA 9
SCLK 10
MAX3514
MAX3516
MAX3517
EXPOSED
PADDLE*
20 GND
19 VCC
18 TXEN
17 N.C.
16 OUT+
15 OUT-
14 CEXT (N.C.)
13 N.C.
12 SHDN
11 GND ( ) FOR MAX3517 ONLY
* MAX3516 ONLY
QSOP/TSSOP-EP
________________________________________________________________ Maxim Integrated Products 1
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.

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