MAX2009 Maxim Integrated Products, MAX2009 Datasheet - Page 12

• Manufacturer Part Number: MAX2009
• Description: 1200MHz to 2500MHz Adjustable RF Predistorter The MAX2009 Adjustable RF Predistorter is Designed to Improve Power Amplifier (PA) Adjacent-channel Power Rejection (ACPR) BY Introducing Gain And Phase Expansion in a pa Chain to Compensate For The Pa's
• Manufacturer: Maxim Integrated Products

The MAX2009 adjustable predistorter can provide up to
12dB of ACPR improvement for high-power amplifiers by
introducing gain and phase expansion to compensate
for the PA’s gain and phase compression. The MAX2009
enables real-time software-controlled distortion correc-
tion, as well as set-and-forget tuning through the adjust-
ment of the expansion starting point (breakpoint) and the
rate of expansion (slope). The gain and phase break-
1200MHz to 2500MHz Adjustable
RF Predistorter
12
8, 10, 16, 20,
1, 2, 4, 5, 7,
22, 26, 28
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PIN
11
12
13
14
15
17
18
19
21
23
24
25
27
EP
3
6
9
PBRAW
PDCS1
PDCS2
PBEXP
NAME
OUTG
OUTP
V
PFS1
PFS2
V
PBIN
GND
GND
GBP
GCS
GFS
ING
INP
CCG
CCP
Detailed Description
Ground. Internally connected to the exposed paddle.
RF Gain Input. Connect ING to a coupling capacitor if it is not connected to OUTP. ING is
interchangeable with OUTG.
RF Phase Output. Connect OUTP to a coupling capacitor if it is not connected to INP. OUTP is
interchangeable with INP.
RF Phase Input. Connect INP to a coupling capacitor. This pin is interchangeable with OUTP.
Fine Phase-Slope Control Input 1. See the Typical Application Circuit.
Fine Phase-Slope Control Input 2. See the Typical Application Circuit.
Digital Coarse Phase-Slope Control Range Input 1. Set to logical zero for the steepest slope.
Digital Coarse Phase-Slope Control Range Input 2. Set to logical zero for the steepest slope.
Phase Breakpoint Control Input
Phase Expansion Output. Connect PBEXP to PBRAW to use PBIN as the breakpoint control voltage.
Uncompensated Phase Breakpoint Input
Gain-Control Supply Voltage. Bypass with a 0.01µF capacitor to ground as close to the device as
possible. Gain section can operate without V
Gain Breakpoint Control Input
Fine Gain-Slope Control Input
Coarse Gain-Slope Control Input
RF Gain Output. Connect OUTG to a coupling capacitor. OUTG is interchangeable with ING.
Exposed Ground Paddle. Solder EP to the ground plane.
Phase-Control Supply Voltage. Bypass with a 0.01µF capacitor to ground as close to the device as
possible. Phase section can operate without V
points can be set over a 20dB input power range. The
phase expansion slope is variable from 0.3°/dB to
2.0°/dB and can be adjusted for a maximum of 24° of
phase expansion. The gain expansion slope is variable
from 0.1dB/dB to 0.6dB/dB and can be adjusted for a
maximum of 7dB gain expansion.
The following sections describe the tuning methodology
best implemented with a class A amplifier. Other classes
of operation may require significantly different settings.
CCP
FUNCTION
CCG
.
.
Pin Description