IDTF1320NBGI
F1300
DatasheetDATASHEET
DPD Demodulator for PA Linearization
550MHz to 1150MHz
FEATURES (I OR Q PATH)
GENERAL DESCRIPTION
Wide flat performance IF BW
Wide RF and LO BWs (~ 0.8 GHz)
Ideal for Multi-Carrier Systems
Drives ADC directly
Ultra linear +43 dBm IP3O
Low Noise Figure
Excellent ACLR performance
200 Ω output impedance
Fully integrated DPD demodulator
6x6 36 pin package
Standby Mode w/Fast Recovery
ICC: 262 mA
This document describes the specification for the
IDTF1320 Digital Pre-Distortion Demodulator for PA
linearization. This device is one of 2 variants to cover
common UTRA bands. See the Part# Matrix below for
details.
COMPETITIVE ADVANTAGE
In typical basestation transmitters a digital pre-distortion
loop is employed to improve the Transmitter
performance. The signal coming out of the PA is
sampled so that the I&Q data at Baseband can be pre-
distorted before being sent to the Tx DAC to counteract
the distortion inherent in the downstream PA. The signal
coupled from the PA is adjusted via a digital step
attenuator to a lower level and then sub-sampled at an
IF frequency of ~200 MHz which necessitates the need
for a highly linear demodulator to downmix to
quadrature IF from the Transmit frequency. By
sampling IF_I and IF_Q independently and then digitally
combining these signals, an effective doubling of the
sample rate can be achieved. Any distortion in this path
will degrade the performance of the DPD algorithm. By
utilizing an ultra-linear demodulator w/integrated DSA
such as the IDTF1320, the ACLR and/or power
consumption of the full Tx system can be improved
significantly.
DEVICE BLOCK DIAGRAM
CSb SDI CLK
SPI
DEC
IFI
SPLIT
STBY
ISET
Bias
Control
2
90O
.
IBIAS
RFSW
LOSW
RFIN_Y
RFIN_X
IFQ
LOIN_A
LOIN_B
DPD full path ACLR: 1 dB
Icc: DPD function Power
Consumption 40%
RF VCO
Zero-DistortionTM Demod
eliminates 2 IF amps
ORDERING INFORMATION
Integrates 2 BPFs, 2 Baluns,
2 SP2Ts
Omit IDT
prefix
0.8 mm height
Tape &
Reel
Glitch-FreeTM gain control
package
TM
Glitch-FreeTM
IDTF1320NBGI8
PART# MATRIX
RF product Line
Green Industrial
Part#
RF range
UTRA
bands
IF freq
range
Typ.
Gain
Injection
Temp range
5,6,8,12,13,
14,17
High Side
or Low Side
F1320
550 - 1150
20 - 350
12.5
1,2,3,4,9,10
7,21, 24, 38
High Side
or Low Side
F1370
1300 - 2900
20 - 500
12.5
IDT Zero-DistortionTM, Glitch-FreeTM DPD Receiver
1
Rev4 January 2014