IDTF1370NBGI
Datasheet
DPD Demodulator for PA Linearization
1300MHz to 2900MHz
G
ENERAL
D
ESCRIPTION
This document describes the specification for the
IDTF1370
Digital Pre-Distortion
Demodulator for PA
linearization. This series of devices is offered in 2
variants to cover common UTRA bands. See part
number matrix below for additional detail.
F
EATURES
(I
OR
Q
PATH
)
Wide flat performance IF BW
Wide RF and LO BWs (~ 1.6 GHz)
Ideal for Multi-Carrier Systems
Drives ADC directly
Ultra linear
+41 dBm IP3
O
Low Noise Figure
Excellent ACLR performance
200 Ω
output impedance
Fully integrated DPD demodulator
6x6 36 pin package
Standby Mode w/Fast Recovery
I
CC
:
275 mA
C
OMPETITIVE
A
DVANTAGE
In typical basestation transmitters digital pre-distortion is
employed to improve the Transmitter performance. The
signal coming out of the PA is sampled and the incoming
Tx chain I&Q data is pre-distorted to counteract the
distortion inherent in the PA. The PA signal 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 IDTF1370, the ACLR and/or power
consumption of the full Tx system can be improved
significantly.
DPD full path ACLR:
1 dB
Icc: DPD function Power
Consumption
40%
Zero-Distortion
TM
Demod
eliminates 2 IF amps
Integrates 2 BPFs, 2 Baluns,
SPDT RF switch
D
EVICE
B
LOCK
D
IAGRAM
CSb SDI CLK
SPI
DEC
IF
I
SPLIT
STBY
Bias
Control
.
I
SET
2
90
O
I
BIAS
RF
IN_Y
RF
IN_X
LO
IN
RF VCO
IF
Q
O
RDERING
I
NFORMATION
Glitch-Free
TM
TM
Glitch-Free
TM
gain control
Omit IDT
prefix
0.8 mm height Tape &
package
Reel
P
ART
# M
ATRIX
Part#
RF range
UTRA
bands
5,6,8,12,13,
14,17
1,2,3,4,9,10
7,21, 24, 38
IF freq
range
20 - 35 0
Typ.
Gain
12.5
Injection
High Side
or Low Side
High Side
or Low Side
IDTF1370NBGI8
RF product Line
Green
Industrial
Temp range
20 - 50 0
12.5
F1320
550 - 1150
F1370
1300 - 2900
IDT Zero-Distortion
TM
, Glitch-Free
TM
DPD Receiver
1
Rev4, January 2014
IDTF1370NBGI
Datasheet
DPD Demodulator for PA Linearization
1300MHz to 2900MHz
PRELIMINARY DATASHEET
-0.3V to +5.5V
0V to 3.6V
0V to V
CC
1V to (Vcc + 0.3V)
-0.3V to +0.3V
-0.3V to +0.3V
-0.3V to +1.2V
2.1V to 4.0V
+27 dBm
2.5W
+40°C/W
+3°C/W
T
C
= -40°C to +105°C
150°C
-65°C to +150°C
1
+260°C
A
BSOLUTE
M
AXIMUM
R
ATINGS
V
CC
to GND
SW_Latch, DATA, CSb, CLK
STBY
IF_I+, IF_I-, IF_Q+, IF_Q-
LO_IN
RF_INX, RF_INY
IF_BiasI, IF_BiasQ to GND
LO_ADJ to GND
RF Input Power (Into RFIN_X or RFIN_Y)
Continuous Power Dissipation
θ
JA
(Junction – Ambient)
θ
JC
(Junction – Case)
The Case is defined as the exposed paddle
Operating Temperature Range (Case Temperature)
Maximum Junction Temperature
Storage Temperature Range
Moisture Sensitivity Level
Lead Temperature (soldering, 10s)
Stresses above those listed above may cause permanent damage to the device. Functional operation of the
device at these or any other conditions above those indicated in the operational section of this specification is
not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
ESD Caution
This product features proprietary protection circuitry. However, it may be damaged if
subjected to high energy ESD. Please use proper ESD precautions when handling to
avoid damage or loss of performance.
IDT Zero-Distortion
TM
, Glitch-Free
TM
DPD Receiver
2
Rev4, January 2014
IDTF1370NBGI
Datasheet
DPD Demodulator for PA Linearization
1300MHz to 2900MHz
PRELIMINARY DATASHEET
IDTF1370 S
PECIFICATION
Parameter
Logic Input High
Logic Input Low
Logic Current
Supply Voltage(s)
Temperature Range
Supply Current
Supply Current
RF Freq Range
IF center Freq Range
Oversample RF Range
Specifications apply at V
CC
= +5.0V, T
C
= 25C,
F
RF
= 2100 MHz, F
LO
= 2300 MHz,
Gain = G
MAX
, P
LO
= 0
dBm,
T
C
= +25°C, STBY = GND
unless otherwise noted. Full Lineup measured through to I or Q path. IF Transformers and
RF input trace losses
de-embedded.
Comment
For
STBY, DATA, CSb, CLK, SW_Latch
For
STBY, DATA, CSb, CLK, SW_Latch
V
H
= 2.3V, V
L
= 0V
Symbol
V
IH
V
IL
I
IH,
I
IL
V
CC
T
CASE
I
SUPP
STBY > V
IH
min
2.3
typ
max
0.5
units
V
V
μA
V
-120
4.75 to
5.25
-40
275
30
1450
100
1300
+100
All V
CC
(operating range)
Operating Range
Total V
CC
Standby Mode:
Sets LO freq range
Sets LO freq range
Measure Gain at I&Q
Gain setting = G
MAX
F
LO
= 1800 MHz, 2920 MHz
Gain Delta < 2.5 dB
Measure Gain at I&Q
Gain setting = G
MAX
F
LO
= 1800 MHz, 2920 MHz
Gain Delta < 2.5 dB
RF Freq = 2100 MHz
IP3O > +38 dBm
From RF_INX to I+,I- & Q+,Q-
Pin = -11 dBm/Tone;
Gain setting = G
MAX
IF Freq = 200 MHz
IP3O > +39 dBm
From RF_INX to I+,I- & Q+,Q-
Pin = -11 dBm/Tone
Gain setting = G
MAX
Operating Range
+105
325
40
2700
300
2900
degC
mA
mA
MHz
MHz
MHz
I
STBY
F
RF
F
IF
F
RFD
Oversample IF Range
F
IFD
20
500
MHz
IF Linearity BW
IF
LIN
100
300
MHz
RF Linearity BW
LO Freq Range
LO Power
RF Input Impedance
IF Output Impedance
LO port Impedance
Gain maximum
RF
LIN
F
LO
P
LO
Z
RF
Z
IF
Z
LO
G
MAX
1600
1400
-3 to +3
50
200
50
10.8
1
12.5
2700
2900
MHz
MHz
dBm
Ω
Ω
Ω
Single Ended (RL > 10 dB)
Differential (RL > 10 dB)
Single Ended (RL > 10 dB)
From RF_INX to I+,I- & Q+,Q-
Gain setting = G
MAX
Pin = -11 dBm
From RF_INX to I+,I- & Q+,Q-
Gain setting = G
MAX
Pin = -11 dBm
RF = 2000MHz
LO = 1800MHz
From RF_INX to I+,I- & Q+,Q-
Gain setting = G
MIN
Pin = +14 dBm
13.8
dB
Gain maximum Low
Side Injection
G
MAX_LSLO
12.7
dB
Gain minimum
G
MIN
-13.5
-12.8
-12
dB
IDT Zero-Distortion
TM
, Glitch-Free
TM
DPD Receiver
3
Rev4, January 2014
IDTF1370NBGI
Datasheet
DPD Demodulator for PA Linearization
1300MHz to 2900MHz
PRELIMINARY DATASHEET
IDTF1370 S
PECIFICATION
- C
ONTINUED
Parameter
Noise Figure
Output IP3 – G
MAX
Specifications apply at V
CC
= +5.0V, T
C
= 25C,
F
RF
= 2100 MHz, F
LO
= 2300 MHz,
Gain = G
MAX
, P
LO
= 0
dBm,
T
C
= +25°C, STBY = GND
unless otherwise noted. Full Lineup measured through to I or Q path. IF Transformers and
RF input trace losses
de-embedded.
Comment
From RF_INX to I+,I- & Q+,Q-
Gain setting = G
MAX
Measured at I+,I- and Q+,Q-
P
IN
= -11 dBm per tone
5 MHz Tone Separation
Gain setting = G
MAX
Measured at I+,I- and Q+,Q-
P
IN
= +9 dBm per tone
5 MHz Tone Separation
Gain setting = G
-20
Measured at I+,I- and Q+,Q-
P
IN
= -11 dBm
Gain setting = G
MAX
Measured at I+,I- and Q+,Q-
P
IN
= -11 dBm per tone
5 MHz Tone Separation
Gain setting = G
MAX
Measured at I+,I- and Q+,Q-
P
IN
= +4 dBm
Gain setting = G
MAX
Fixed LO = 2300 MHz
RF = 1800 to 2280 MHz
IF = 20 to 500 MHz
Fixed LO = 2300
RF = 1800 to 2280 MHz
IF = 20 to 500 MHz
Symbol
NF
IP3
MAX
min
typ
17.4
max
units
dB
dBm
36
41
Output IP3 – G
-20
2
nd
Harmonic
IP3
-20
38
2
40
dBm
H2
-68
-75
dBc
Output IP2
IP2
O
63
69
dBm
Output compression
Gain Ripple
Group Delay Distortion
Quadrature Amplitude
Balance
Quadrature Phase
Balance
Amplitude Balance over
environmentals
Quadrature Phase
Balance over
environmentals
LO to IF leakage
LO to RF leakage
RF to IF isolation
Attenuator Range
C
Ripple
GDD
BAL
G
BAL
Φ
BAL
G
BAL
Φ
ISO
LI
ISO
LR
-0.3
-2.6
-0.5
0.2
0.8
5
1
1.3
dB
dB
nsec
Calculated from Data from
Oversample RF range Tests
Measure with 20 GSa/sec scope
0.3
-1.5
0
+0.4
dB
degrees
dB
Tc = -40C to 105C
LO drive = -3 dBm to +3 dBm
Measure with 20 GSa/sec scope
Tc = -40C to 105C
LO drive = -3 dBm to +3 dBm
Measure with 20 GSa/sec scope
Output balun not de-embedded
-3
-33
-42
-54
25.5
+2
-28
degrees
dBm
dBm
Output balun not de-embedded
ISO
RI
Range
-46
dBc
dB
IDT Zero-Distortion
TM
, Glitch-Free
TM
DPD Receiver
4
Rev4, January 2014
IDTF1370NBGI
Datasheet
DPD Demodulator for PA Linearization
1300MHz to 2900MHz
PRELIMINARY DATASHEET
IDTF1370 S
PECIFICATION
- C
ONTINUED
Parameter
Attenuator Glitching
Attenuator Step Accuracy
Attenuator Abs. Accuracy
Attenuator Resolution
Serial Clock Speed
Data to Clock Setup
Data to Clock Hold
Clock to CS Setup
Clock Pulse Width
RF Switch Isolation
SPI 3 wire bus
SPI 3 wire bus
SPI 3 wire bus
SPI 3 wire bus
SPI 3 wire bus
F
RF
< 2.0 GHz
Specifications apply at V
CC
= +5.0V, T
C
= 25C,
F
RF
= 2100 MHz, F
LO
= 2300 MHz,
Gain = G
MAX
, P
LO
= 0
dBm,
T
C
= +25°C, STBY = GND
unless otherwise noted. Full Lineup measured through to I or Q path. IF Transformers and
RF input trace losses
de-embedded.
Comment
Step from 15.5 to 16 dB
Step from 16 to 15.5 dB
Measure maximum excursion
Symbol
ATTN
G
DNL
INL
LSB
F
CLOCK
T
S
T
H
T
EN
T
W
ISO
RFSW
min
typ
0.7
0.2
0.2
0.5
20
max
units
dB
dB
0.75
dB
dB
50
MHz
ns
ns
ns
ns
3
3
3
5
-41
dBc
RF Switch and attenuator settling times
3
EN bit on
EN bit off
RF switched X to Y (no Y
signal)
RF switched Y to X (no Y
signal)
Attenuator switched 0dB
to 25.5dB (max)
Attenuator switched
25.5dB (max) to 0dB
Attenuator switched
15.5dB to 16dB
Attenuator switched 16dB
to 15.5dB
EN
ON
EN
OFF
RF
SWXY
RF
SWYX
LO_INA: 2300MHz, 0dBm
RF_INX: 2100MHz, -11dBm
100
50
150
200
300
300
nsec
ATT
SETL
250
250
S
PECIFICATION
N
OTES
:
1 – Items in min/max columns in
bold italics
are Guaranteed by Test
2 – All other Items in min/max columns are Guaranteed by Design Characterization
3 – Excludes SPI write time
IDT Zero-Distortion
TM
, Glitch-Free
TM
DPD Receiver
5
Rev4, January 2014
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