IQ Demodulator. LTC5584 Datasheet

LTC5584 Demodulator. Datasheet pdf. Equivalent


Part LTC5584
Description 30MHz to 1.4GHz IQ Demodulator
Feature Features n I/Q Bandwidth of 530MHz or Higher n High IIP3: 31dBm at 450MHz, 28dBm at 900MHz n H.
Manufacture Linear Technology
Datasheet
Download LTC5584 Datasheet


Features n I/Q Bandwidth of 530MHz or Higher n High IIP3 LTC5584 Datasheet
Recommendation Recommendation Datasheet LTC5584 Datasheet




LTC5584
Features
n I/Q Bandwidth of 530MHz or Higher
n High IIP3: 31dBm at 450MHz, 28dBm at 900MHz
n High IIP2: 70dBm at 450MHz, 65dBm at 900MHz
n User Adjustable IIP2 to >80dBm
n User Adjustable DC Offset Null
n High Input P1dB: 13.1dBm at 900MHz
n Image Rejection: 45dB at 900MHz
n Noise Figure: 9.9dB at 450MHz
10dB at 900MHz
n Conversion Gain: 5.4dB at 450MHz
5.7dB at 900MHz
n Shutdown Mode
n Operating Temperature Range (TC): –40°C to 105°C
n 24-Lead 4mm × 4mm QFN Package
Applications
n LTE/W-CDMA/TD-SCDMA Base Station Receivers
n Wideband DPD Receivers
n Point-To-Point Broadband Radios
n High Linearity Direct Conversion I/Q Receivers
n Image Rejection Receivers
LTC5584
30MHz to 1.4GHz IQ
Demodulator with IIP2 and
DC Offset Control
Description
The LTC®5584 is a direct conversion quadrature demodu-
lator optimized for high linearity receiver applications in
the 30MHz to 1.4GHz frequency range. It is also usable
in the 10MHz to 30MHz and 1.4GHz to 2GHz ranges with
reduced performance. It is suitable for communications
receivers where an RF signal is directly converted into I
and Q baseband signals with bandwidth of 530MHz or
higher. The LTC5584 incorporates balanced I and Q mix-
ers, LO buffer amplifiers and a precision, high frequency
quadrature phase shifter. In addition, the LTC5584 provides
four analog control voltage interface pins for IIP2 and DC
offset correction, greatly simplifying system calibration.
The high linearity of the LTC5584 provides excellent spur-
free dynamic range for the receiver. This direct conversion
demodulator can eliminate the need for intermediate fre-
quency (IF) signal processing, as well as the corresponding
requirements for image filtering and IF filtering. These
I/Q outputs can interface directly to channel-select filters
(LPFs) or to baseband amplifiers.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
Typical Application
Direct Conversion Receiver with IIP2 and DC Offset Calibration
BPF
LNA BPF
RF
INPUT
RF+
RF
5V
VCC
I+ LPF
I
VGA
IP2 AND DC
OFFSET CAL
IP2 ADJUST
DC OFFSET
LO INPUT
LO
LTC5584
90°
IP2 AND DC
OFFSET CAL
DC OFFSET
IP2 ADJUST
ENABLE
EN
Q+ LPF
Q
VGA
A/D
D/A
D/A
D/A
D/A
A/D
5584 TA01a
IIP2 vs IP2I, IP2Q Trim Voltage
130
120
I, –40°C
I, 25°C
I, 85°C
Q, –40°C
Q, 25°C
Q, 85°C
fRF = 450MHz
I, 105°C
Q, 105°C
110
100
90
80
70
60
50
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
IP2I, IP2Q (V)
5584 TA01b
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LTC5584
LTC5584
Absolute Maximum Ratings
(Note 1)
VCC Supply Voltage.................................... –0.3V to 5.5V
IV–C, AIP+, VQo+l,taQge,..C..M...I.,..C...M...Q...V..o..l.t.a..g..e....................2....5..V...t.o. VVCCCC±+0.00.53VV
VLOol+t,aLgOe o,nRAFn+,yROFtheInrpPuint ..P..o..w..e..r................–...0....3..V...t.o...V..C..C.2+0d0B.3mV
RF+, RFInput DC Voltage......................... –0.3V to 2.7V
Maximum Junction Temperature (TJMAX).............. 150°C
Operating Temperature Range (TC)
(Note 3)................................................... –40°C to 105°C
Storage Temperature Range................... –65°C to 150°C
Pin Configuration
TOP VIEW
IP2Q 1
DCOQ 2
DCOI 3
IP2I 4
RF+ 5
RF6
24 23 22 21 20 19
18 CMQ
17 VCAP
25 16 LO
GND 15 LO+
14 GND
13 GND
7 8 9 10 11 12
UF PACKAGE
24-LEAD (4mm × 4mm) PLASTIC QFN
TJMAX = 150°C, θJC = 7°C/W
EXPOSED PAD (PIN 25) IS GND, MUST BE SOLDERED TO PCB
Order Information
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LTC5584IUF#PBF
LTC5584IUF#TRPBF
5584
24-Lead (4mm x 4mm) Plastic QFN
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
TEMPERATURE RANGE
–40°C to 105°C
Electrical Characteristics= 0.5V, PRF = –5dBm (–5dBm/tone for 2-tone IIP2 and IIP3 teTsCts=),2P5°LCO,=V6CdCB=m5,V,unElNes=s5oVt,hEeDrCwi=seEInPo2te=d0.V(,NRoEteFs=2I,P32,I
= IP2Q =
5, 6, 9)
DCOI
=
DCOQ
SYMBOL PARAMETER
CONDITIONS
fRF(RANGE) RF Input Frequency Range
(Note 12)
fLO(RANGE) LO Input Frequency Range
(Note 12)
PLO(RANGE) LO Input Power Range
(Note 12)
fRF1 = 140MHz, fRF2 = 141MHz, fLO = 130MHz, L6 = 68nH, C19 = 8.0pF, L5 = 82nH
fRF(MATCH) RF Input Frequency Range
Return Loss > 10dB
fLO(MATCH) LO Input Frequency Range
Return Loss > 10dB
GV Voltage Conversion Gain
Loaded with 100Ω Pull-Up (Note 8)
NF Noise Figure
Double-Side Band (Note 4)
NFBLOCKING Noise Figure Under Blocking Conditions
IIP3 Input 3rd Order Intercept
Double-Side Band, PRF = 0dBm (Note 7)
IIP2 Input 2nd Order Intercept
Unadjusted, EIP2 = 0V
IIP2OPT
P1dB
Optimized Input 2nd Order Intercept
Input 1dB Compression
EIP2 = 5V, IP2I, IP2Q Adjusted for Minimum IM2
DCOFFSET
G
DC Offset at I/Q Outputs
I/Q Gain Mismatch
Unadjusted, EDC = 0V (Note 13)
∆φ I/Q Phase Mismatch
MIN TYP MAX
30 to 1400
30 to 1400
0 to 10
95 to 190
105 to 180
5.7
9.9
15.5
33
70
80
12
1.5
0.02
0.2
UNITS
MHz
MHz
dBm
MHz
MHz
dB
dB
dB
dBm
dBm
dBm
dBm
mV
dB
Deg
5584f
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