19-3605; Rev 0; 2/05
KIT
ATION
EVALU
E
BL
AVAILA
SiGe High-Linearity, 815MHz to 995MHz
Downconversion Mixer with LO Buffer/Switch
General Description
The MAX9986 high-linearity downconversion mixer pro-
vides 10dB gain, +23.6dBm IIP3, and 9.3dB NF for
815MHz to 995MHz base-station receiver applications.
With a 960MHz to 1180MHz LO frequency range, this
particular mixer is ideal for high-side LO injection
receiver architectures. Low-side LO injection is sup-
ported by the MAX9984, which is pin-for-pin and func-
tionally compatible with the MAX9986.
In addition to offering excellent linearity and noise perfor-
mance, the MAX9986 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 MAX9986 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 MAX9986 is also func-
tionally compatible with the MAX9993.
The MAX9986 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
♦
815MHz to 995MHz RF Frequency Range
♦
960MHz to 1180MHz LO Frequency Range
(MAX9986)
♦
570MHz to 850MHz LO Frequency Range
(MAX9984)
♦
50MHz to 250MHz IF Frequency Range
♦
10dB Conversion Gain
♦
+23.6dBm Input IP3
♦
+12dBm Input 1dB Compression Point
♦
9.3dB Noise Figure
♦
67dBc 2LO-2RF 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 49dB 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
MAX9986
Applications
850MHz W-CDMA Base Stations
GSM 850/GSM 900 2G and 2.5G EDGE Base
Stations
cdmaOne™ and cdma2000
®
Base Stations
iDEN
®
Base Stations
Ordering Information
PART
MAX9986ETP
MAX9986ETP-T
MAX9986ETP+D
TEMP RANGE PIN-PACKAGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PKG
CODE
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
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.
MAX9986ETP+TD -40°C to +85°C
*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.
________________________________________________________________
Maxim Integrated Products
1
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, 815MHz to 995MHz
Downconversion Mixer with LO Buffer/Switch
MAX9986
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
(MAX9986
Typical Application Circuit,
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
(MAX9986
Typical Application Circuit,
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 995MHz, f
LO
= 960MHz to 1180MHz, f
IF
= 160MHz, f
LO
> f
RF
, 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
= 1070MHz, f
IF
= 160MHz, T
C
=
+25°C, unless otherwise noted.) (Note 1)
PARAMETER
RF Frequency Range
LO Frequency Range
IF Frequency Range
Conversion Gain
Gain Variation Over Temperature
SYMBOL
f
RF
f
LO
f
IF
G
C
(Note 2)
(Note 2)
MAX9984
(Note 2)
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 3)
Two tones:
f
RF1
= 910MHz, f
RF2
= 911MHz,
P
RF
= -5dBm/tone, f
LO
= 1070MHz,
P
LO
= 0dBm, T
A
= +25°C
T
C
= +25°C to -40°C
T
C
= +25°C to +85°C
CONDITIONS
MIN
815
960
570
50
9
10
-0.007
TYP
MAX
995
1180
850
250
11
UNITS
MHz
MHz
MHz
dB
dB/°C
Conversion Gain Flatness
±0.15
dB
Input Compression Point
12
dBm
Input Third-Order Intercept Point
IIP3
21
23.6
dBm
Input IP3 Variation Over
Temperature
-1.7
+1.0
dB
2
_______________________________________________________________________________________
SiGe High-Linearity, 815MHz to 995MHz
Downconversion Mixer with LO Buffer/Switch
AC ELECTRICAL CHARACTERISTICS (continued)
(MAX9986
Typical Application Circuit,
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 995MHz, f
LO
= 960MHz to 1180MHz, f
IF
= 160MHz, f
LO
> f
RF
, 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
= 1070MHz, f
IF
= 160MHz, T
C
=
+25°C, unless otherwise noted.) (Note 1)
PARAMETER
Noise Figure
SYMBOL
NF
CONDITIONS
Single sideband, f
IF
= 190MHz
f
RF
= 900MHz (no signal)
f
LO
= 1090MHz
f
BLOCKER
= 990MHz
f
IF
= 190MHz
(Note 4)
P
BLOCKER
=
+8dBm
P
BLOCKER
=
+11dBm
MIN
TYP
9.3
19
dB
24
MAX
UNITS
dB
MAX9986
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
2LO-2RF
3LO-3RF
P
LO
= +3dBm
T
C
= +25°C (Note 5)
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
42
42
0.3
dB
2
+3
67
62
87
77
49
50
-47
-30
46
50
20
27
dB
26
22
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:
Note 2:
Note 3:
Note 4:
All limits include external component losses. Output measurements taken at IF output of the
Typical Application Circuit.
Operation outside this range is possible, but with degraded performance of some parameters.
Compression point characterized. It is advisable not to operate continuously the mixer RF input above +12dBm.
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.
Note 5:
Guaranteed by design and characterization.
_______________________________________________________________________________________
3
SiGe High-Linearity, 815MHz to 995MHz
Downconversion Mixer with LO Buffer/Switch
MAX9986
Typical Operating Characteristics
(MAX9986
Typical Application Circuit,
V
CC
= +5.0V, P
LO
= 0dBm, P
RF
= -5dBm, f
LO
> f
RF
, f
IF
= 160MHz, unless otherwise noted.)
CONVERSION GAIN vs. RF FREQUENCY
MAX9986 toc01
CONVERSION GAIN vs. RF FREQUENCY
MAX9986 toc02
CONVERSION GAIN vs. RF FREQUENCY
MAX9986 toc03
12
T
C
= -40°C
11
CONVERSION GAIN (dB)
T
C
= -25°C
12
12
11
CONVERSION GAIN (dB)
11
CONVERSION GAIN (dB)
10
10
10
9
T
C
= +25°C
T
C
= +85°C
8
9
P
LO
= -3dBm, 0dBm, +3dBm
9
V
CC
= 4.75V, 5.0V, 5.25V
8
8
7
740
790
840
890
940
990
1040
RF FREQUENCY (MHz)
7
740
790
840
890
940
990
1040
RF FREQUENCY (MHz)
7
740
790
840
890
940
990
1040
RF FREQUENCY (MHz)
INPUT IP3 vs. RF FREQUENCY
MAX9986 toc04
INPUT IP3 vs. RF FREQUENCY
MAX9986 toc05
INPUT IP3 vs. RF FREQUENCY
V
CC
= 4.75V
MAX9986 toc06
26
T
C
= +85°C
25
24
INPUT IP3 (dBm)
23
22
21
T
C
= -40°C
20
19
740
790
840
890
940
990
T
C
= -25°C
T
C
= +25°C
26
25
24
INPUT IP3 (dBm)
23
P
LO
= +3dBm, 0dBm, -3dBm
22
21
20
19
26
25
24
INPUT IP3 (dBm)
23
22
21
20
19
V
CC
= 5.25V
V
CC
= 5.0V
1040
740
790
840
890
940
990
1040
740
790
840
890
940
990
1040
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
NOISE FIGURE vs. RF FREQUENCY
MAX9986 toc07
NOISE FIGURE vs. RF FREQUENCY
MAX9986 toc08
NOISE FIGURE vs. RF FREQUENCY
IF = 190MHz
11
NOISE FIGURE (dB)
10
9
V
CC
= 4.75V, 5.0V, 5.25V
8
7
6
MAX9986 toc09
12
11
NOISE FIGURE (dB)
10
9
8
7
6
IF = 190MHz
T
C
= +25°C
T
C
= +85°C
12
IF = 190MHz
11
NOISE FIGURE (dB)
10
9
P
LO
= +3dBm, 0dBm, -3dBm
8
7
6
12
T
C
= -40°C
T
C
= -25°C
760
820
880
940
1000
760
820
880
940
1000
760
820
880
940
1000
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
4
_______________________________________________________________________________________
SiGe High-Linearity, 815MHz to 995MHz
Downconversion Mixer with LO Buffer/Switch
MAX9986
Typical Operating Characteristics (continued)
(MAX9986
Typical Application Circuit,
V
CC
= +5.0V, P
LO
= 0dBm, P
RF
= -5dBm, f
LO
> f
RF
, f
IF
= 160MHz, unless otherwise noted.)
2LO-2RF RESPONSE vs. RF FREQUENCY
MAX9986 toc10
2LO-2RF RESPONSE vs. RF FREQUENCY
MAX9986 toc11
2LO-2RF RESPONSE vs. RF FREQUENCY
P
RF
= -5dBm
70
2LO-2RF RESPONSE (dBc)
65
60
V
CC
= 4.75V
55
V
CC
= 5.0V
50
45
V
CC
= 5.25V
MAX9986 toc12
75
70
2LO-2RF RESPONSE (dBc)
65
75
70
2LO-2RF RESPONSE (dBc)
65
60
55
50
45
P
RF
= -5dBm
T
C
= +85°C
P
RF
= -5dBm
P
LO
= +3dBm
75
P
LO
= 0dBm
T
C
= -40°C, -25°C
60
T
C
= +25°C
55
50
45
740
790
840
890
940
990
1040
RF FREQUENCY (MHz)
P
LO
= -3dBm
740
790
840
890
940
990
1040
740
790
840
890
940
990
1040
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
3LO-3RF RESPONSE vs. RF FREQUENCY
MAX9986 toc13
3LO-3RF RESPONSE vs. RF FREQUENCY
MAX9986 toc14
3LO-3RF RESPONSE vs. RF FREQUENCY
P
RF
= -5dBm
90
3LO-3RF RESPONSE (dBc)
85
80
75
70
V
CC
= 4.75V, 5.0V, 5.25V
65
60
55
MAX9986 toc15
95
90
3LO-3RF RESPONSE (dBc)
85
80
75
70
65
60
55
P
RF
= -5dBm
T
C
= +85°C
T
C
= +25°C
95
P
RF
= -5dBm
90
3LO-3RF RESPONSE (dBc)
85
80
75
70
P
LO
= -3dBm, 0dBm, +3dBm
65
60
55
95
T
C
= -25°C
T
C
= -40°C
740
790
840
890
940
990
1040
740
790
840
890
940
990
1040
740
790
840
890
940
990
1040
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
INPUT P
1dB
vs. RF FREQUENCY
MAX9986 toc16
INPUT P
1dB
vs. RF FREQUENCY
MAX9986 toc17
INPUT P
1dB
vs. RF FREQUENCY
V
CC
= 5.25V
MAX9986 toc18
14
T
C
= +25°C
13
INPUT P
1dB
(dBm)
12
11
T
C
= -40°C
10
9
8
740
790
840
890
940
990
T
C
= -25°C
T
C
= +85°C
14
13
INPUT P
1dB
(dBm)
12
11
10
9
8
P
LO
= -3dBm, 0dBm, +3dBm
14
13
INPUT P
1dB
(dBm)
12
11
10
9
8
V
CC
= 4.75V
V
CC
= 5.0V
1040
740
790
840
890
940
990
1040
740
790
840
890
940
990
1040
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
_______________________________________________________________________________________
5
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