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Preliminary Technical Data
FEATURES
I/Q Demodulator RF frequency 400 MHz to 6000MHz IIP3 +31 dBm IIP2 +60dBm Input P1dB +12dBm NF 13.2 dB @ 2.5GHz Voltage Conversion Gain of 4dB Quadrature demodulation accuracy Phase accuracy <0.5 Amplitude balance <0.25 dB LO Input -10 to +6 dBm Demodulation Bandwidth ~500 MHz I/Q Drive 2Vpp into 200
400 to 6000MHz Quadrature Demodulator ADL5380
APPLICATIONS
QAM/QPSK demodulator W-CDMA/CDMA/CDMA2000/GSM Point-to-(Multi)Point Radio WiMax/LTE
Figure 1. Functional Block Diagram
GENERAL DESCRIPTION
The ADL5380 is a high performance quadrature I-Q demodulator that covers an RF input frequency range from 400 MHz to 6 GHz. With a NF = 13dB, IP1dB = 12dBm and IIP3 = 31dBm at 2.5GHz, the demodulator offers good dynamic range suitable for the demanding infrastructure direct-conversion requirements. The differential RF inputs provide a well-behaved broad-band input impedance of 50 and should be driven from a 1:1 balun for best performance. Excellent quadrature accuracy is achieved using on-chip polyphase filters for LO quadrature generation. Over a wide range of local oscillator (LO) levels, excellent demodulation accuracy is achieved with phase and amplitude balances < 0.25 dB and < 0.5o, respectively. The demodulated in-phase (I) and quadrature (Q) differential outputs are fully buffered. The ADL5380 provides a typical voltage conversion gain of 4dB independent of differential load impedances as low as 100 with a drive capability exceeding 2Vpp in to 200 . The fully balanced design minimizes effects from 2nd order distortion. The leakage from the LO port to the RF port is <60dBc. Differential DC-offsets at the I and Q outputs are <10mV. Both of these factors contribute to the excellent IIP2 of >60dBm. The ADL5380 operates off a 4.75V to 5.25V supply with a typical supply current of 200mA. The ADL5380 is fabricated using Analog Devices' advanced Silicon-Germanium bipolar process and is available in a 24-lead exposed paddle LFCSP package. Performance is specified over a -40oC to +85oC temperature range.
Rev. PrB
Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.326.8703 (c) 2008 Analog Devices, Inc. All rights reserved.
AD5380 SPECIFICATIONS
Preliminary Technical Data
Table 1. VS = 5 V, TA = 25oC, RBIAS = 1.5k for RF 3GHz, RBIAS = 200 for RF 3GHz, Zo= 50 unless otherwise noted. I & Q are loaded to 50 using a 9:1 balun. Loss of RF input balun de-embedded from measurements. M/A COM ETC1-1-13 used for RF 3GHz. Johanson 3600BL14M050 used for 3GHz RF 4GHz.
Parameter OPERATING CONDITIONS LO Frequency Range RF input Impedance RF Frequency Range RF INPUT @ 700MHz Input P1dB Voltage Conversion Gain Second Order Input Intercept (IIP2) Third Order Input Intercept (IIP3) Noise Figure Condition Min 0.4 50 0.4 RFIP, RFIN 450 load on QHI, QLO, IHI, ILO -5 dBm Each Tone -5 dBm Each Tone 11.2 4.3 72 28 11.5 TBD 11 3.5 67 27 12.8 TBD 12 2.9 60 31 13.2 TBD 11 4.5 54 22 14.7 TBD dBm dB dBm dBm dB With a -4dBm interferer 5MHz away RF INPUT @ 1900MHz Input P1dB Voltage Conversion Gain Second Order Input Intercept (IIP2) Third Order Input Intercept (IIP3) Noise Figure RFIP, RFIN 450 load on QHI, QLO, IHI, ILO -5 dBm Each Tone -5 dBm Each Tone dBm dB dBm dBm dB dB dBm dB dBm dBm dB dB dBm dB dBm dBm dB dB dB 6 Typ Max 6 Unit GHz GHz
RF INPUT @ 2500MHz Input P1dB Voltage Conversion Gain Second Order Input Intercept (IIP2) Third Order Input Intercept (IIP3) Noise Figure
With a -4dBm interferer 5MHz away RFIP, RFIN 450 load on QHI, QLO, IHI, ILO -5 dBm Each Tone -5 dBm Each Tone
RF INPUT @ 3500MHz Input P1dB Voltage Conversion Gain Second Order Input Intercept (IIP2) Third Order Input Intercept (IIP3) Noise Figure
With a -4dBm interferer 5MHz away RFIP, RFIN 450 load on QHI, QLO, IHI, ILO -5 dBm Each Tone -5 dBm Each Tone
With a -4dBm interferer 5MHz away LO INPUT Input Return Loss LO input level LO-RF Leakage LOIP, LOIN AC-coupled into LOIP with LOIN bypassed, measured at 2GHz -10 RFIN,RFIP terminated in 50 , LO Power= 0dBm
9 5 -57
dB dBm dBm
Rev. PrB | Page 2 of 10
Preliminary Technical Data
I/Q BASEBAND OUTPUTS Voltage Conversion Gain Demodulation Bandwidth Quadrature Phase Error I/Q Amplitude Imbalance Output DC Offset (Differential) 0dBm LO input Output Common-Mode Group Delay Flatness Gain Flatness Output Swing Peak Output Current POWER SUPPLIES Voltage Current Current Any 20 MHz Any 20 MHz Differential 200 load 1k load Each pin VPOS 4.75 With RAdj = 1.5k With RAdj = 200 240 250 Vpos-3 TBD TBD 2 TBD 10 QHI, QLO, IHI, ILO 450 load on QHI, QLO, IHI, ILO @ 1900MHz 200 load Small Signal 3 dB Bandwidth 1Vp-p Signal 3 dB Bandwidth 400 Mhz to 6000 Mhz
ADL5380
4.3 TBD 500 TBD TBD TBD 10
dB dB MHz MHz deg dB mV V ns p-p dB p-p Vp-p Vp-p mA 5.25 V mA mA
Rev. PrB | Page 3 of 10
AD5380 ABSOLUTE MAXIMUM RATINGS
Parameter Supply Voltage VPOS1, VPOS2, VPOS3 LO Input Power RF/IF Input Power Internal Max Power Dissipation JA Maximum Junction Temperature Operating Temperature Range Storage Temperature Range Lead Temperature (Soldering, 60 sec) Rating 5.5 V 10 dBm (re: 50 ) TBD dBm (re: 50 ) TBD mW TBDC/W TBDC -40C to +85C -65C to +125C 300C
Preliminary Technical Data
Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those listed in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
ESD CAUTION
Rev. PrB | Page 4 of 10
Preliminary Technical Data PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
24 1 2 3 4 5 6 VCC GND GND IHI ILO GND VCC ENBL GND 7 8 LOIP LOIN GND 9 10 11 23 GND 22 21 20 GND 19 ADJ GND 18 GND 17 QHI 16 QLO 15 GND 14 VCC 13 NC 12 RFIP RFIN
ADL5380
ADL5380
TOP VIEW (Not to Scale)
Figure 2. Pin Configuration
Table 2. Pin Function Descriptions
Pin No. 1,2,5,8,11,14,17,18,20,23 6, 13, 24 Mnemonic GND VCC Description Ground Connect. Supply. Positive supply for LO, IF, biasing, and baseband sections. These pins should be decoupled to the board ground using appropriate-sized capacitors. o a low impedance ground plane. Do not connect these pins. Enable Control. current. The default setting for this pin is open. Local Oscillator Input. Pins must be ac-coupled. A differential drive through a balun (recommended balun is the M/A-COM ETC1-1-13 for lower frequecies and Johanson xxxx for higher frequecies) is necessary to achieve optimal performance. I Channel and Q Channel Mixer Baseband Outputs. These outputs have a 50 differential output impedance (25 per pin). Each output pair can swing 2 V p-p (differential) into a load of 200 . Output 3 dB bandwidth is ~ 500 MHz. A resistor to VPOS that optimizes third order intercept. For operation < 3GHz, RADJ = 1.5 k. For operation from 3GHz to 4GHz, RADJ = 200. RF Input. A single-ended 50 signal can be applied to the RF inputs through a 1:1 balun (recommended balun is the M/A-COM ETC1-1-13 for lower frequecies and Johanson xxxx for higher frequecies). Exposed Paddle. Connect to a low impedance thermal and electrical ground plane.
12, 7 9,10
NC ENBL LOIP, LOIN
3,4,15,16
IHI, ILO, QLO, QHI ADJ RFIN, RFIP
19 21, 22
EP
Rev. PrB | Page 5 of 10
AD5380 TYPICAL PERFORMANCE CHARACTERISTICS
Preliminary Technical Data
VS = 5 V, T = 25C, RADJ = 1.5 k, ZO = 50 , ETC1-1-13 balun on RF input. Balun loss de-embedded.
15
14
80
35
12 10
75
30
10
70
25
IP 1 d B (d B )
G a in (d B )
IIP 2 (d B m )
5 6
60
15
0
4
55 10
2
50 5
-5 500
1000
1500
2000
2500
0 3000
RF Frequency (MHz)
45 500
1000
1500
2000
2500
0 3000
RF Frequency (MHz)
Figure 3. Gain & IP1dB vs. Frequency
Figure 6 IIP3 and IIP2 vs. Frequency
15 14 13
1 0.8 0.6 0.4
NF (dB)
12 11 10 9 8 500
M agnitude Error (dB)
+85 Deg +25 Deg -40 Deg
0.2 0 -0.2 -0.4 -0.6 -0.8
1000
1500
2000
2500
3000
LO Frequency (MHz)
-1 500
1000
1500
2000
2500
IIP 3 (d B m )
8
65
20
3000
RF Frequency (MHz)
Figure 4. Noise Figure vs. Frequency
Figure 7.Magnitude Imbalance vs. Frequency
5 4
70
60
3 2 P h a s e E rro r (D e g re e s ) 1 0 -1 -2 -3 -4 -5 500
Im ag e R ejectio n (d B ) 50
40
30
20
10
0 400
600
800
1000
1200
1400
1600
1800
2000
2200
2400
2600
2800
3000
1000
1500
2000 RF Frequency (MHz)
2500
3000
Frequency (Mhz)
Figure 5. Phase Imbalance vs. Frequency
Rev. PrB | Page 6 of 10
Figure 8. Image Rejection vs. Frequency
Preliminary Technical Data
VS = 5 V, T = 25C, RADJ = 200, ZO = 50 , Johanson 3600BL14M050 balun used on RF input. Balun loss de-embedded.
15 9
55 60
ADL5380
25
7 10 5
50
20
IP1dB (dB)
IIP2 (dBm)
Gain (dB)
5
3 1
45
40
10
0
-1 -3
35
5
30
-5 3000
3200
3400
3600
3800
4000
-5 4200
25 3000
0
3200 3400 3600 3800 4000 4200
RF Frequency (MHz)
RF Frequency (MHz)
Figure 9. Gain & IP1dB vs. Frequency
1 0.8 0.6 0.4 M a g n itu d e E rro r (d B ) 0.2 0 -0.2 -0.4 -0.6 -0.8 -1 3000
Figure 12 IIP3 and IIP2 vs. Frequency
18 17 16 15 14
NF (dB)
13 12 11 10 9 8 3000
+85 Deg +25 Deg -40 Deg
3200
3400
3600
3800
4000
4200
LO Frequency (MHz)
3200
3400
3600 RF Frequency (MHz)
3800
4000
Figure 10. Noise Figure vs. Frequency
Figure 13. Magnitude Imbalance vs. Frequency
5
0
4 3 2
-20 -10
P h a s e E rro r (d e g re e s )
1 0 -1
-40 E V M (d B ) -30 3.5GHz
-2 -3 -4 -5 3000
-60 -70 -60 -50 -40 -30 -20 -10 0 -50 700MHz
3200
3400
3600 RF Frequency (MHz)
3800
4000
4200
RF Input Power (dBm)
Figure 11. Phase Balance vs. Frequency
Figure 14. WiMAX EVM vs. RF Input Powerr a 16QAM, 10MHz BW signal at 700Mhz and 3.5Ghz
Rev. PrB | Page 7 of 10
IIP3(dBm)
4200
15
AD5380 EVALUATION BOARD
Preliminary Technical Data
The ADL5382 evaluation board is available. There are two versions of the board, optimized for performance for separate frequency ranges. For operation < 3GHz, an FR4 material based board with the ETC1-1-13 balun footprint is available. For operation between 3GHz to 4GHz, a Rogers material based board with the Johanson 3600BL14M050 balun footprint is available. The board can be used for single-ended or differential baseband analysis. The default configuration of the board is for single-ended baseband analysis.
RFx T3x
C5x
C12x
R19x VPOS C11x C8x 24
VCC
R23x VPOS 23
GND
22
RFIP
21
RFIN
20
GND
19
ADJ
1 GND R5x IPx R17x T4x R16x C16x R15x INx 5 GND R4x VPOS C9x R10x C6x
ENBL
GND 18 R3x GND 17 QHI 16 R14x R6x C15x R13x GND 14 VCC 13
NC
2 GND 3 IHI R7x 4 ILO
QPx R18x T2x
ADL5380
QLO 15
GND
GND
LON
LOP
6 VCC
C12x C7x
VPOS C10x
R2x
QNx
7
8
9
10
11
12
R9x
R9x R11x VPOS
R1x
Note: x=A, for low frequency operation upto 3GHz, ETC1-1-13 balun on RF & LO ports.
C2x C1x C3x C4x
P1A VPOS LOPx LO_SE T1x LONx
=B, for frequency operation from 3GHz to 4GHz, Johanson 3600BL14M050 balun on RF & LO ports.
Figure 16. Evaluation Board Schematic
Rev. PrB | Page 8 of 10
Preliminary Technical Data
Table 3. Evaluation Board Configuration Options
Component VPOS, GND R10x, R12x, R19x C6x to C10x P1x, R11x, R9x, R1x R23x C1x to C5x, C12x R2x to R7x, R13x to R18x Function Power Supply and Ground Vector Pins. Power Supply Decoupling. Shorts or power supply decoupling resistors. The capacitors provide the required dc coupling up to 6 GHz. Device Enable. When connected to VPOS, the device is active. Adjust Pin. Resistor value here sets the bias voltage at this pin and optimizes third order distortion. AC Coupling Capacitors. These capacitors provide the required ac coupling from 400MHz to 4GHz. Single-Ended Baseband Output Path. This is the default configuration of the evaluation board. R13x to R18x are populated for appropriate balun interface. R2x to R5x are not populated. Baseband outputs are taken from QHI and IHI. The user can reconfigure the board to use full differential baseband outputs. R2x to R5x provide a means to bypass the 9:1 TCM9-1 transformer to allow for differential baseband outputs. Access the differential baseband signals by populating R2x to R5x with 0 and not populating R13x to R18x. This way the transformer does not need to be removed. The baseband outputs are taken from the SMAs of Q_HI, Q_LO, I_HI, and I_LO. R6x and R7x are provisions for applying a specific differential load across the baseband outputs IF Output Interface. TCM9-1 converts a differential high impedance IF output to a singleended output. When loaded with 50 , this balun presents a 450 load to the device. The center tap can be decoupled through a capacitor to ground. Decoupling Capacitors. C15x and C16x are the decoupling capacitors used to reject noise on the center tap of the TCM9-1. LO Input Interface. A 1:1 RF balun that converts the single-ended RF input to differential signal is used.
ADL5380
Default Condition Not Applicable R10x, R12x, R19x = 0 (0603) C6x, C7x, C8x = 100 pF (0402) C9x, C10x, C11x = 0.1 F (0603) P1A, R9x=DNI, R1x= DNI, R11x= 0 . R23A= 1.5k (0603) R23B= 200 (0603) C2x, C3x, C5x, C12x = 100 pF (0402), C1x, C4x = DNI R13x to R18x = 0 (0402), R2x to R7x = Open
T2x, T4x
T2x, T4x = TCM9-1, 9:1 (MiniCircuits) C15x, C16x = 0.1 F (0402) T1A = ETC1-1-13, 1:1 (M/A COM) for operation < 3GHz. T1B= Johanson 3600BL14M050 for operation from 3GHz to 4GHz. T3A = ETC1-1-13, 1:1 (M/A COM) for operation < 3GHz. T3B= Johanson 3600BL14M050 for operation from 3GHz to 4GHz.
C15x, C16x T1x
T3x
RF Input Interface. A 1:1 RF balun that converts the single-ended RF input to differential signal is used.
Rev. PrB | Page 9 of 10
AD5380 OUTLINE DIMENSIONS
Preliminary Technical Data
Figure 10. 24-Lead Lead Frame Chip Scale Package [LFCSP_VQ] 4 mm x 4 mm Body, Very Thin Quad (CP-24-2) Dimensions shown in millimeters
ORDERING GUIDE
Model ADL5380ACPZ-R7 ADL5380ACPZ-WP ADL5380-30A-EVALZ ADL5380-29A-EVALZ Temperature Range -40C to +85C -40C to +85C Package Description 7" Tape and Reel Waffle Pack Evaluation Board for operation < 3GHz Evaluation Board for operation from 3GHz to 4GHz Package Option
Rev. PrB | Page 10 of 10
PR07585-0-6/08(PrB)

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