19-3648; Rev 0; 4/05
KIT
ATION
EVALU
E
BL
AVAILA
SiGe High-Linearity, 400MHz to 1000MHz
Downconversion Mixer with LO Buffer/Switch
General Description
The MAX9984 high-linearity downconversion mixer pro-
vides 8.1dB gain, +25dBm IIP3, and 9.3dB NF for
400MHz to 1000MHz base-station receiver applica-
tions*. With an optimized 570MHz to 850MHz LO fre-
quency range, this particular mixer is ideal for low-side
LO injection receiver architectures in the cellular band.
High-side LO injection is supported by the MAX9986,
which is pin-for-pin and functionally compatible with the
MAX9984.
In addition to offering excellent linearity and noise perfor-
mance, the MAX9984 also yields a high level of compo-
nent integration. This device includes a double-balanced
passive mixer core, an IF amplifier, a dual-input LO selec-
table switch, and an LO buffer. On-chip baluns are also
integrated to allow for single-ended RF and LO inputs.
The MAX9984 requires a nominal LO drive of 0dBm, and
supply current is guaranteed to be below 265mA.
The MAX9984/MAX9986 are pin compatible with the
MAX9994/MAX9996 1700MHz to 2200MHz mixers,
making this entire family of downconverters ideal for
applications where a common PC board layout is used
for both frequency bands. The MAX9984 is also func-
tionally compatible with the MAX9993.
The MAX9984 is available in a compact, 20-pin, thin
QFN package (5mm x 5mm) with an exposed paddle.
Electrical performance is guaranteed over the extended
-40°C to +85°C temperature range.
Features
♦
400MHz to 1000MHz RF Frequency Range*
♦
325MHz to 850MHz LO Frequency Range*
(MAX9984)
♦
960MHz to 1180MHz LO Frequency Range
(MAX9986)
♦
50MHz to 250MHz IF Frequency Range
♦
8.1dB Conversion Gain
♦
+25dBm Input IP3
♦
+13dBm Input 1dB Compression Point
♦
9.3dB Noise Figure
♦
71dBc 2RF-2LO Spurious Rejection at
P
RF
= -10dBm
♦
Integrated LO Buffer
♦
Integrated RF and LO Baluns for Single-Ended
Inputs
♦
Low -3dBm to +3dBm LO Drive
♦
Built-In SPDT LO Switch with 54dB LO1 to LO2
Isolation and 50ns Switching Time
♦
Pin Compatible with MAX9994/MAX9996 1700MHz
to 2200MHz Mixers
♦
Functionally Compatible with MAX9993
♦
External Current-Setting Resistors Provide Option
for Operating Mixer in Reduced Power/Reduced
Performance Mode
♦
Lead-Free Package Available
MAX9984
Applications
850MHz W-CDMA Base Stations
GSM 850/GSM 900 2G and 2.5G EDGE Base Stations
cdmaOne™ and
cdma2000
®
Base Stations
Ordering Information
PART
MAX9984ETP
MAX9984ETP-T
MAX9984ETP+D
TEMP RANGE PIN-PACKAGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PKG
CODE
iDEN
®
Base Stations
400MHz to 700MHz OFDM/WiMAX CPE and
Base-Station Equipment
Predistortion Receivers
Fixed Broadband Wireless Access
Wireless Local Loop
Private Mobile Radios
Military Systems
Microwave Links
Digital and Spread-Spectrum Communication Systems
cdma2000 is a registered trademark of the Telecommunications
Industry Association.
cdmaOne is a trademark of CDMA Development Group.
iDEN is a registered trademark of Motorola, Inc.
20 Thin QFN-EP**
T2055-3
5mm
×
5mm
20 Thin QFN-EP**
T2055-3
5mm
×
5mm
20 Thin QFN-EP**
T2055-3
5mm
×
5mm
20 Thin QFN-EP**
T2055-3
5mm
×
5mm
MAX9984ETP+TD -40°C to +85°C
*For
an RF frequency range below 815MHz (LO frequency below
570MHz), appropriate tuning is required. See Table 2 for details.
**EP
= Exposed paddle.
+
= Lead free. D = Dry pack. T = Tape-and-reel.
Pin Configuration/Functional Diagram and Typical
Application Circuit appear at end of data sheet.
1
________________________________________________________________
Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
SiGe High-Linearity, 400MHz to 1000MHz
Downconversion Mixer with LO Buffer/Switch
MAX9984
ABSOLUTE MAXIMUM RATINGS
V
CC
to GND ...........................................................-0.3V to +5.5V
IF+, IF-, LOBIAS, LOSEL, IFBIAS to GND...-0.3V to (V
CC
+ 0.3V)
TAP ........................................................................-0.3V to +1.4V
LO1, LO2, LEXT to GND........................................-0.3V to +0.3V
RF, LO1, LO2 Input Power .............................................+12dBm
RF (RF is DC shorted to GND through a balun) .................50mA
Continuous Power Dissipation (T
A
= +70°C)
20-Pin Thin QFN-EP (derate 26.3mW/°C above +70°C)...........2.1W
Note A:
T
C
is the temperature on the exposed paddle of the package.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
θ
JA
.................................................................................+38°C/W
θ
JC
.................................................................................+13°C/W
Operating Temperature Range (Note A) ....T
C
= -40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
DC ELECTRICAL CHARACTERISTICS
(MAX9984
Typical Application Circuit,
using component values in Table 1, V
CC
= +4.75V to +5.25V, no RF signal applied, IF+ and
IF- outputs pulled up to V
CC
through inductive chokes, R
1
= 953Ω, R
2
= 619Ω, T
C
= -40°C to +85°C, unless otherwise noted. Typical
values are at V
CC
= +5V, T
C
= +25°C, unless otherwise noted.)
PARAMETER
Supply Voltage
Supply Current
LO_SEL Input-Logic Low
LO_SEL Input-Logic High
SYMBOL
V
CC
I
CC
V
IL
V
IH
2
CONDITIONS
MIN
4.75
TYP
5.00
222
MAX
5.25
265
0.8
UNITS
V
mA
V
V
AC ELECTRICAL CHARACTERISTICS
(MAX9984
Typical Application Circuit,
using component values in Table 1, V
CC
= +4.75V to +5.25V, RF and LO ports are driven from
50Ω sources, P
LO
= -3dBm to +3dBm, P
RF
= -5dBm, f
RF
= 815MHz to 1000MHz, f
LO
= 570MHz to 850MHz, f
IF
= 160MHz, f
RF
> f
LO
,
T
C
= -40°C to +85°C, unless otherwise noted. Typical values are at V
CC
= +5V, P
RF
= -5dBm, P
LO
= 0dBm, f
RF
= 910MHz, f
LO
=
750MHz, f
IF
= 160MHz, T
C
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER
RF Frequency Range
SYMBOL
f
RF
(Note 2)
(Notes 2, 3)
(Note 2)
LO Frequency Range
IF Frequency Range
Conversion Gain
Gain Variation Over Temperature
f
LO
f
IF
G
C
(Notes 2, 3)
MAX9986
(Note 2)
f
RF
= 910MHz, f
LO
= 750MHz, T
C
= +25°C
T
C
= -40°C to +85°C
Flatness over any one of three frequency bands:
f
RF
= 824MHz to 849MHz
f
RF
= 869MHz to 894MHz
f
RF
= 880MHz to 915MHz
P
1dB
(Note 4)
f
LO
= 570MHz to 850MHz, f
IF
= 160MHz,
P
LO
= 0dBm, T
C
= +25°C (Note 5)
Input Third-Order Intercept Point
IIP3
Two tones:
f
RF1
= 910MHz, f
RF2
= 911MHz,
P
RF
= -5dBm/tone, f
LO
= 750MHz,
P
LO
= 0dBm, T
C
= +25°C
19
dBm
22
25
CONDITIONS
MIN
815
400
570
325
960
50
7.2
8.1
-0.0079
1180
250
9.2
MHz
dB
dB/°C
850
MHz
TYP
MAX
1000
UNITS
MHz
Conversion Gain Flatness
±0.25
dB
Input Compression Point
13
dBm
2
_______________________________________________________________________________________
SiGe High-Linearity, 400MHz to 1000MHz
Downconversion Mixer with LO Buffer/Switch
AC ELECTRICAL CHARACTERISTICS (continued)
(MAX9984
Typical Application Circuit,
using component values in Table 1, V
CC
= +4.75V to +5.25V, RF and LO ports are driven from
50Ω sources, P
LO
= -3dBm to +3dBm, P
RF
= -5dBm, f
RF
= 815MHz to 1000MHz, f
LO
= 570MHz to 850MHz, f
IF
= 160MHz, f
RF
> f
LO
,
T
C
= -40°C to +85°C, unless otherwise noted. Typical values are at V
CC
= +5V, P
RF
= -5dBm, P
LO
= 0dBm, f
RF
= 910MHz, f
LO
=
750MHz, f
IF
= 160MHz, T
C
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER
Input IP3 Variation Over
Temperature
Noise Figure
NF
SYMBOL
CONDITIONS
T
C
= +25°C to -40°C
T
C
= +25°C to +85°C
Single sideband, f
IF
= 190MHz
f
RF
= 900MHz (no signal)
f
LO
= 1090MHz
f
BLOCKER
= 981MHz
f
IF
= 190MHz
(Note 6)
P
BLOCKER
=
+8dBm
P
BLOCKER
=
+11dBm
MIN
TYP
-1.5
+0.8
9.3
19
dB
24
MAX
UNITS
dB
dB
MAX9984
Noise Figure Under-Blocking
Small-Signal Compression
Under-Blocking Condition
LO Drive
2x2
Spurious Response at IF
3x3
LO1 to LO2 Isolation
LO Leakage at RF Port
LO Leakage at IF Port
RF-to-IF Isolation
LO Switching Time
RF Port Return Loss
P
BLOCKER
=
P
FUNDAMENTAL
= -5dBm +8dBm
f
FUNDAMENTAL
= 910MHz
P
BLOCKER
=
f
BLOCKER
= 911MHz
+11dBm
-3
2RF-2LO
3RF-3LO
P
LO
= +3dBm
T
C
= +25°C (Note 5)
P
LO
= +3dBm
P
LO
= +3dBm
P
LO
= +3dBm
50% of LOSEL to IF settled to within 2°
LO1/2 port selected,
LO2/1 and IF terminated
P
RF
= -10dBm
P
RF
= -5dBm
P
RF
= -10dBm
P
RF
= -5dBm
LO2 selected
LO1 selected
47
47
0.25
dB
0.6
+3
71
66
87
82
54
60
-32
-23
54
50
14
23
dB
20
16
dB
dB
dBm
dBm
dB
ns
dB
dBc
dBm
LO Port Return Loss
LO1/2 port unselected,
LO2/1 and IF terminated
IF Port Return Loss
LO driven at 0dBm, RF terminated into 50Ω,
differential 200Ω
Note 1:
All limits include external component losses. Output measurements taken at IF output of the
Typical Application Circuit.
Note 2:
Operation outside this range is possible, but with degraded performance of some parameters.
Note 3:
See Table 2 for component list required for 400MHz to 500MHz operation. For operation from 500MHz to 800MHz, appropriate
tuning is required; please contact the factory for support.
Note 4:
Compression point characterized. It is advisable not to operate continuously the mixer RF input above +12dBm.
Note 5:
Guaranteed by design and characterization.
Note 6:
Measured with external LO source noise filtered so the noise floor is -174dBm/Hz. This specification reflects the effects of all
SNR degradations in the mixer, including the LO noise as defined in Maxim Application Note 2021.
_______________________________________________________________________________________
3
SiGe High-Linearity, 400MHz to 1000MHz
Downconversion Mixer with LO Buffer/Switch
MAX9984
Typical Operating Characteristics
(MAX9984
Typical Application Circuit,
using component values in Table 1, V
CC
= +5.0V, P
LO
= 0dBm, P
RF
= -5dBm,
f
RF
> f
LO
, f
IF
=
160MHz,
unless otherwise noted.)
CONVERSION GAIN vs. RF FREQUENCY
MAX9984 toc01
CONVERSION GAIN vs. RF FREQUENCY
MAX9984 toc02
CONVERSION GAIN vs. RF FREQUENCY
MAX9984 toc03
11
11
11
10
CONVERSION GAIN (dB)
T
C
= -25°C
9
CONVERSION GAIN (dB)
9
CONVERSION GAIN (dB)
T
C
= -40°C
10
10
9
8
T
C
= +25°C
8
P
LO
= -3dBm, 0dBm, +3dBm
7
8
V
CC
= 4.75V, 5.0V, 5.25V
7
T
C
= +85°C
7
6
700
800
900
1000
1100
RF FREQUENCY (MHz)
6
700
800
900
1000
1100
RF FREQUENCY (MHz)
6
700
800
900
1000
1100
RF FREQUENCY (MHz)
INPUT IP3 vs. RF FREQUENCY
MAX9984 toc04
INPUT IP3 vs. RF FREQUENCY
MAX9984 toc05
INPUT IP3 vs. RF FREQUENCY
V
CC
= 4.75V
V
CC
= 5.25V
MAX9984 toc06
27
26
25
INPUT IP3 (dBm)
T
C
= +85°C
27
26
25
INPUT IP3 (dBm)
24
23
22
P
LO
= -3dBm, 0dBm, +3dBm
26
25
24
INPUT IP3 (dBm)
23
22
21
20
19
V
CC
= 5.0V
24
23
T
C
= -25°C
22
21
20
700
800
900
1000
1100
RF FREQUENCY (MHz)
T
C
= -40°C
T
C
= +25°C
21
20
700
800
900
1000
1100
RF FREQUENCY (MHz)
700
800
900
1000
1100
RF FREQUENCY (MHz)
NOISE FIGURE vs. RF FREQUENCY
T
C
= +25°C
MAX9984 toc07
NOISE FIGURE vs. RF FREQUENCY
MAX9984 toc08
NOISE FIGURE vs. RF FREQUENCY
MAX9984 toc09
12
11
NOISE FIGURE (dB)
10
9
8
7
6
5
700
800
900
T
C
= -25°C
T
C
= -40°C
T
C
= +85°C
12
11
NOISE FIGURE (dB)
10
9
8
7
6
5
P
LO
= -3dBm, 0dBm, +3dBm
12
11
NOISE FIGURE (dB)
10
9
8
7
6
5
V
CC
= 4.75V, 5.0V, 5.25V
1000
700
800
900
1000
700
800
900
1000
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
4
_______________________________________________________________________________________
SiGe High-Linearity, 400MHz to 1000MHz
Downconversion Mixer with LO Buffer/Switch
Typical Operating Characteristics (continued)
(MAX9984
Typical Application Circuit,
using component values in Table 1, V
CC
= +5.0V, P
LO
= 0dBm, P
RF
= -5dBm,
f
RF
> f
LO
, f
IF
=
160MHz,
unless otherwise noted.)
2RF-2LO RESPONSE vs. RF FREQUENCY
MAX9984 toc10
MAX9984
2RF-2LO RESPONSE vs. RF FREQUENCY
MAX9984 toc11
2RF-2LO RESPONSE vs. RF FREQUENCY
P
RF
= -5dBm
V
CC
= 4.75V
V
CC
= 5.0V
MAX9984 toc12
75
70
2RF-2LO RESPONSE (dBc)
65
60
P
RF
= -5dBm
T
C
= +85°C
75
70
2RF-2LO RESPONSE (dBc)
65
60
P
RF
= -5dBm
80
75
2RF-2LO RESPONSE (dBc)
70
65
60
55
50
45
P
LO
= -3dBm
T
C
= +25°C
55
50
45
700
800
900
1000
1100
RF FREQUENCY (MHz)
T
C
= -25°C, -40°C
P
LO
= +3dBm
55
50
45
700
800
900
1000
1100
RF FREQUENCY (MHz)
P
LO
= 0dBm
V
CC
= 5.25V
700
800
900
1000
1100
RF FREQUENCY (MHz)
3RF-3LO RESPONSE vs. RF FREQUENCY
MAX9984 toc13
3RF-3LO RESPONSE vs. RF FREQUENCY
MAX9984 toc14
3RF-3LO RESPONSE vs. RF FREQUENCY
P
RF
= -5dBm
V
CC
= 5.25V
MAX9984 toc15
95
P
RF
= -5dBm
95
T
C
= +85°C
P
RF
= -5dBm
95
3RF-3LO RESPONSE (dBc)
3RF-3LO RESPONSE (dBc)
85
85
3RF-3LO RESPONSE (dBc)
85
75
T
C
= -40°C
T
C
= -25°C
75
75
V
CC
= 4.75V
V
CC
= 5.0V
65
T
C
= +25°C
65
P
LO
= -3dBm, 0dBm, +3dBm
65
55
700
800
900
1000
1100
RF FREQUENCY (MHz)
55
700
800
900
1000
1100
RF FREQUENCY (MHz)
55
700
800
900
1000
1100
RF FREQUENCY (MHz)
INPUT P
1dB
vs. RF FREQUENCY
MAX9984 toc16
INPUT P
1dB
vs. RF FREQUENCY
MAX9984 toc17
INPUT P
1dB
vs. RF FREQUENCY
MAX9984 toc18
15
T
C
= -25°C
14
INPUT P
1dB
(dBm)
13
12
11
T
C
= -40°C
10
9
700
800
900
1000
T
C
= +85°C
T
C
= +25°C
15
14
INPUT P
1dB
(dBm)
13
12
11
10
9
15
14
INPUT P
1dB
(dBm)
13
12
11
10
9
V
CC
= 4.75V
V
CC
= 5.0V
V
CC
= 5.25V
P
LO
= -3dBm, 0dBm, +3dBm
1100
700
800
900
1000
1100
700
800
900
1000
1100
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
_______________________________________________________________________________________
5
stm32/stm8
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
