Data Sheet
FEATURES
Integrated baluns for single-ended receiver (Rx) inputs and
local oscillator (LO) input
Rx channel gain: 22 dB
Noise figure (NF): 10 dB
P1dB: −10 dBm
LO input range: −8 dBm to +5 dBm
Rx to IF isolation: 30 dB
RF signal bandwidth: 250 MHz
Rx output impedance: 900 Ω differential
LO input buffer: 24 GHz
RF and LO S11 at 50 Ω: −5 dB
Temperature sensor with analog output: ±5°
Electrostatic discharge (ESD) performance
Human body model (HBM): 2000 V
Charged device model (CDM): 500 V
Qualified for automotive applications
4-Channel, 24 GHz,
Receiver Downconverter
ADF5904
GENERAL DESCRIPTION
The
ADF5904
is a 4-channel, 24 GHz, receiver downconverter.
Each channel contains a single-ended RF input with an on-chip
balun followed by a differential low noise amplifier (LNA) and a
downconverter mixer with differential output buffers. The RF
LO path also has an on-chip balun.
Control of the on-chip registers is through a simple 3-wire
interface.
The
ADF5904
comes in a compact 32-lead, 5 mm × 5 mm
LFCSP package.
APPLICATIONS
Automotive radars
Industrial radars
Microwave (µW) radar sensors
FUNCTIONAL BLOCK DIAGRAM
AV
DD
ATEST
CE
CLK
DATA
LE
DOUT
32-BIT DATA
REGISTER
RX1_RF
RX2_RF
RX3_RF
RX4_RF
TEMP
SENSOR
BALUN
LNA
BALUN
LNA
BALUN
LNA
BALUN
LNA
LO_IN
BALUN
ADF5904
RX1_OB
RX2_OB
RX3_OB
RX4_OB
RX1_O
RX2_O
RX3_O
RX4_O
GND
Figure 1.
Rev. A
Document Feedback
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2015–2016 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
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.
12885-001
ADF5904
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Timing Characteristics ................................................................ 4
Absolute Maximum Ratings............................................................ 5
ESD Caution .................................................................................. 5
Pin Configuration and Function Descriptions ............................. 6
Typical Performance Characteristics ............................................. 7
Theory of Operation ........................................................................ 9
RF Path ........................................................................................... 9
LO Path .......................................................................................... 9
Data Sheet
Input Shift Register .......................................................................9
Program Modes .............................................................................9
Register Map ................................................................................... 10
Register 0 ..................................................................................... 11
Register 1 ..................................................................................... 12
Register 2 ..................................................................................... 12
Initialization Sequence .............................................................. 13
Temperature Sensor ................................................................... 13
Application Information ................................................................ 14
Application of the ADF5904 in FMCW Radar ...................... 14
Outline Dimensions ....................................................................... 15
Ordering Guide .......................................................................... 15
Automotive Products ................................................................. 15
REVISION HISTORY
2/16—Rev. 0 to Rev. A
Changes to Features Section............................................................ 1
Change to Parameter HBM, Table 3 .............................................. 5
Change to Temperature Sensor Section....................................... 13
Changes to Ordering Guide .......................................................... 15
3/15—Revision 0: Initial Version
Rev. A | Page 2 of 15
Data Sheet
SPECIFICATIONS
ADF5904
AV
DD
= 3.3 V ± 5%, GND = 0 V, dBm referred to 50 Ω, T
A
= T
MAX
to T
MIN
, unless otherwise noted. Operating temperature range is −40°C
to +105°C.
Table 1.
Parameter
OPERATING CONDITIONS
LO and RF Frequency Range
LO INPUT
Input Return Loss (S11)
LO Input Level
BASEBAND OUTPUTS
Voltage Conversion Gain
Demodulation Bandwidth
Output DC Offset (Differential)
Output Common Mode
Output Swing
Channel to Channel Phase Mismatch over
Temperature
DYNAMIC PERFORMANCE, RF = 24.125 GHz
Conversion Gain
Input P1dB
RF Input Return Loss
Second-Order Input Intercept
Third-Order Input Intercept
LO to RF Isolation
RF to IF Isolation
Noise Figure
Noise Figure Under Blocking Conditions
LOGIC INPUTS
Input Voltage
High
Low
Input Current
Input Capacitance
LOGIC OUTPUTS
Output Voltage
High
Low
Output Current
High
Low
TEMPERATURE SENSOR
Analog Accuracy
Sensitivity
POWER SUPPLIES
AV
DD
Power-Down Current
Symbol
Min
24
−5
−5
22
10
±20
AV
DD
− 1.0
2
±5
Typ
Max
24.25
Unit
GHz
dB
dBm
dB
MHz
mV
V
V peak
Degrees
Measured differentially
Maximum capacitance = 10 pF
Test Conditions/Comments
−8
+5
Differential 900 Ω load
IIP2
IIP3
22
−10
−5
20
0
30
30
10
15
dB
dBm
dB
dBm
dBm
dB
dB
dB
dB
Terminated in 50 Ω
Double sideband (DSB) at 100 kHz
With a −30 dBm input interferer at
5 MHz offset from carrier (DSB)
V
IH
V
IL
I
INH
, I
INL
C
IN
1.4
0.6
±1
10
V
V
µA
pF
V
OH
V
OL
I
OH
I
OL
V
DD
− 0.4
0.4
500
500
±5
4.243
170
100
V
V
µA
µA
°C
mV/°C
mA
µA
V
DD
selected from the DOUT VSEL
bit (Bit DB8, Register 0)
Following one-point calibration
Rev. A | Page 3 of 15
ADF5904
TIMING CHARACTERISTICS
Data Sheet
AV
DD
= 3.3 V ± 5%, GND = 0 V, dBm referred to 50 Ω, T
A
= T
MAX
to T
MIN
, unless otherwise noted. Operating temperature range is −40°C
to +105°C.
Table 2.
Parameter
t
1
t
2
t
3
t
4
t
5
t
6
t
7
t
8
t
9
Limit at T
MIN
to T
MAX
20
10
10
25
25
10
20
10
15
Unit
ns min
ns min
ns min
ns min
ns min
ns min
ns min
ns max
ns max
Description
LE setup time
DATA to CLK setup time
DATA to CLK hold time
CLK high duration
CLK low duration
CLK to LE setup time
LE pulse width
LE setup time to DOUT
CLK setup time to DOUT
Timing Diagrams
t
4
CLK
t
5
t
2
DATA
DB31 (MSB)
DB30
t
3
DB2
(CONTROL BIT C3)
DB1
(CONTROL BIT C2)
DB0 (LSB)
(CONTROL BIT C1)
t
7
LE
t
1
t
6
DOUT
DB31
(MSB)
DB30
DB1
DB0
t
9
Figure 2. Timing Diagram
500µA
I
OL
TO DOUT PIN
C
L
10pF
V
DD
/2
500µA
I
OH
Figure 3. Load Circuit for DOUT Timing, C
L
= 10 pF
Rev. A | Page 4 of 15
12885-003
12885-002
t
8
Data Sheet
ABSOLUTE MAXIMUM RATINGS
T
A
= 25°C, unless otherwise noted.
Table 3.
Parameter
AV
DD
to GND
Digital Input/Output Voltage to GND
Analog Input/Output Voltage to GND
RXx_RF, LO_IN to GND
Operating Temperature Range
Storage Temperature Range
Maximum Junction Temperature
θ
JA
Thermal Impedance
1
(Pad Soldered)
Reflow Soldering
Peak Temperature
Time at Peak Temperature
Transistor Count
CMOS
Bipolar
ESD
CDM
HBM
1
ADF5904
Stresses at or above those listed under Absolute Maximum
Ratings may cause permanent damage to the product. This is a
stress rating only; functional operation of the product at these
or any other conditions above those indicated in the operational
section of this specification is not implied. Operation beyond
the maximum operating conditions for extended periods may
affect product reliability.
Rating
–0.3 V to +3.9 V
–0.3 V to AV
DD
+ 0.3 V
–0.3 V to AV
DD
+ 0.3 V
–0.3 V to AV
DD
+ 0.3 V
–40°C to +105°C
–65°C to +125°C
150°C
40.83°C/W
260°C
40 sec
65,100
2280
500 V
2000 V
ESD CAUTION
Two signal planes (that is, on the top and the bottom surfaces of the board),
two buried planes, and nine vias.
Rev. A | Page 5 of 15
京公网安备 11010802033920号
EEWORLD
