MAX3524 Datasheet, PDF (1/7 Pages) Maxim Integrated Products – Low-Noise, High-Linearity Broadband Amplifier

19-1764; Rev 2; 6/05
Low-Noise, High-Linearity
Broadband Amplifier
General Description
The MAX3524 broadband amplifier is designed specifi-
cally for cable television receiver and cable modem
applications. The MAX3524 is a single-ended input, dif-
ferential-output low-noise amplifier (LNA) that offers
15dB of gain. It operates from a +4.75V to +5.25V sin-
gle supply from 44MHz to 880MHz. The MAX3524
includes an operational amplifier that is used to control
an off-chip PIN attenuator circuit at the input of the LNA.
The attenuator is typically used to regulate the input
signal to a value that maintains high linearity for large
signals. The MAX3524 is available in a 10-pin µMAX^®
package with an exposed paddle (EP) and operates in
the extended temperature range (-40°C to +85°C).
Features
o Single-Ended Input, Differential Output
o +4.75V to +5.25V Single-Supply Operation
o Broadband Operation: 44MHz to 880MHz
o Low Noise Figure: 4.2dB
o High Linearity: IIP2 (42dBm), IIP3(14dBm)
o Voltage Gain: 15dB
o Independent On-Chip Op Amp
Cable Modems
Cable Set-Top Boxes
Broadband Amplifiers
CATV Infrastructures
Applications
µMAX is a registered trademark of Maxim Integrated Products, Inc.
Ordering Information
PART
MAX3524EVB
MAX3524EVB+
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
*EP = Exposed paddle.
+Denotes lead-free package.
PIN-PACKAGE
10 µMAX-EP*
10 µMAX-EP*
Typical Application Circuit
INPUT:
44-880MHz
75Ω TO 2kΩ
V_CC = 5V
10µF
PIN
ATTENUATOR
1
0.1µF
2
V_CC
RFOUT- 10
MAX3524
RFIN
V_CC ⁹
0.1µF _{L1 = 0.5nH TO 1nH}
C_L < 1.8pF
OUTPUT TO TUNER
(DIFFERENTIAL DRIVE)
V_CC = 5V
10µF
10nF
3
RFGND
8
RFOUT+
0.1µF _{L2 = 0.5nH TO 1nH}
4 OPOUT
OPIN+ 7
FROM DEMOD IC
TO CONTROL PIN
R1
0.1µF ^ATTENUATOR
3kΩ
OP AMP
D2
CMDSH-3
5 OPIN-
6
L_BIAS = 680nH
BIAS
GND
R_BIAS = 5.9Ω
R2
*
3kΩ
D1
CMDSH-3
*EXPOSED PADDLE
Pin Configuration appears at end of data sheet.
________________________________________________________________ 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.