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MAX3507 Datasheet(PDF) 1 Page - Maxim Integrated Products

Part No. MAX3507
Description  Upstream CATV Amplifier with On-Chip Anti-Alias Filter
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
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General Description
The MAX3507 is a variable-gain power amplifier for use
in CATV upstream transmitters. The variable-gain fea-
ture has 55dB of dynamic range and is controlled by a
3-wire SPI™ bus. The device is capable of generating
+64dBmV output (16QAM/QPSK) when driven with a
+34dBmV nominal input signal. The on-chip anti-alias
lowpass filter with 75MHz cutoff frequency saves sys-
tem design cost and space. The optional positive slope
generator provides system design flexibility.
The device operates from a single +5V supply and
draws 220mA nominal during transmit at max gain
(100% duty cycle). For burst-type transmissions, the
device is shut off between bursts to minimize noise and
save power while still maintaining a match at the output.
The device is optimized for high linearity with harmonic
levels below -55dBc.
The MAX3507 is available in a 28-pin QFN package
and operates over the extended industrial temperature
range (-40°C to +85°C).
Applications
Cable Modem Upstream Transmitter
Set-Top Box Upstream Transmitter
Telephony Over Cable
Features
o Built-In 5th-Order Elliptic Anti-Aliasing Filter
o 5MHz to 65MHz Operation
o 55dB Gain Control Range
o Optional Positive Slope Generator
o 55dB Spurious-Free Dynamic Range Over
Transmit Band
Upstream CATV Amplifier with
On-Chip Anti-Alias Filter
________________________________________________________________ Maxim Integrated Products
1
Ordering Information
28
26
25
24
23
22
27
16
17
15
20
21
18
19
10
812
13
911
14
5
4
3
2
1
7
6
VCC
VCC
BIASF
DC+
DC-
GND
IN+
IN-
VCC
4:1
IMPEDANCE
RATIO
TXEN
N.C.
N.C.
CEXT
N.C.
OUT+
OUT-
DIGITAL
CONTROL
LINES
VCC
OPTIONAL
EQUALIZER
5-POLE
ELLIPTIC
FILTER
VCC
VCC
SERIAL DATA
GAIN
CONTROL
BIAS
CIRCUIT
MAX3507
Typical Operating Circuit
19-2092; Rev 0; 7/01
Pin Configuration appears 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.
PART
TEMP. RANGE
PIN-PACKAGE
MAX3507EGI
-40°C to +85°C
28 QFN
SPI is a trademark of Motorola, Inc.




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