MAX3507EGI Maxim, MAX3507EGI Datasheet
MAX3507EGI
Manufacturer Part Number
MAX3507EGI
Description
Upstream CATV Amplifier with On-Chip Anti-Alias Filter
Manufacturer
Maxim
Datasheet
1.MAX3507EGI.pdf
(12 pages)
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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).
19-2092; Rev 0; 7/01
SPI is a trademark of Motorola, Inc.
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.
Cable Modem Upstream Transmitter
Set-Top Box Upstream Transmitter
Telephony Over Cable
________________________________________________________________ Maxim Integrated Products
General Description
V
CC
CONTROL
BIASF
DIGITAL
GND
DC+
DC-
V
LINES
IN+
IN-
CC
Applications
1
2
3
4
5
6
7
28
8
EQUALIZER
OPTIONAL
Upstream CATV Amplifier with
27
9
SERIAL DATA
ELLIPTIC
5-POLE
FILTER
10
26
25
11
V
CONTROL
CIRCUIT
On-Chip Anti-Alias Filter
CC
BIAS
GAIN
MAX3507
12
24
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
Pin Configuration appears at end of data sheet.
Transmit Band
MAX3507EGI
13
23
PART
22
14
V
CC
V
CC
21
20
19
18
17
16
15
Typical Operating Circuit
TXEN
N.C.
OUT+
OUT-
N.C.
CEXT
N.C.
TEMP. RANGE
-40°C to +85°C
Ordering Information
V
CC
IMPEDANCE
RATIO
4:1
PIN-PACKAGE
28 QFN
Features
1
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