MAXIM MAX9984ETP-T

KIT
ATION
EVALU
E
L
B
A
IL
AVA
19-3648; Rev 0; 4/05
SiGe High-Linearity, 400MHz to 1000MHz
Downconversion Mixer with LO Buffer/Switch
Features
The MAX9984 high-linearity downconversion mixer provides 8.1dB gain, +25dBm IIP3, and 9.3dB NF for
400MHz to 1000MHz base-station receiver applications*. With an optimized 570MHz to 850MHz LO frequency 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 performance, the MAX9984 also yields a high level of component integration. This device includes a double-balanced
passive mixer core, an IF amplifier, a dual-input LO selectable 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 functionally compatible with the MAX9993.
♦ 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
PRF = -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
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.
Applications
850MHz W-CDMA Base Stations
Ordering Information
GSM 850/GSM 900 2G and 2.5G EDGE Base Stations
cdmaOne™ and cdma2000® Base Stations
iDEN® Base Stations
400MHz to 700MHz OFDM/WiMAX CPE and
Base-Station Equipment
PART
TEMP RANGE PIN-PACKAGE
MAX9984ETP
-40°C to +85°C
20 Thin QFN-EP**
T2055-3
5mm × 5mm
MAX9984ETP-T
-40°C to +85°C
20 Thin QFN-EP**
T2055-3
5mm × 5mm
MAX9984ETP+D
-40°C to +85°C
20 Thin QFN-EP**
T2055-3
5mm × 5mm
MAX9984ETP+TD -40°C to +85°C
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.
PKG
CODE
*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.
________________________________________________________________ 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.
1
MAX9984
General Description
MAX9984
SiGe High-Linearity, 400MHz to 1000MHz
Downconversion Mixer with LO Buffer/Switch
ABSOLUTE MAXIMUM RATINGS
θJA .................................................................................+38°C/W
θJC .................................................................................+13°C/W
Operating Temperature Range (Note A) ....TC = -40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
VCC to GND ...........................................................-0.3V to +5.5V
IF+, IF-, LOBIAS, LOSEL, IFBIAS to GND...-0.3V to (VCC + 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 (TA = +70°C)
20-Pin Thin QFN-EP (derate 26.3mW/°C above +70°C)...........2.1W
Note A: TC 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.
DC ELECTRICAL CHARACTERISTICS
(MAX9984 Typical Application Circuit, using component values in Table 1, VCC = +4.75V to +5.25V, no RF signal applied, IF+ and
IF- outputs pulled up to VCC through inductive chokes, R1 = 953Ω, R2 = 619Ω, TC = -40°C to +85°C, unless otherwise noted. Typical
values are at VCC = +5V, TC = +25°C, unless otherwise noted.)
PARAMETER
SYMBOL
Supply Voltage
VCC
Supply Current
ICC
LO_SEL Input-Logic Low
VIL
LO_SEL Input-Logic High
VIH
CONDITIONS
MIN
TYP
MAX
UNITS
4.75
5.00
5.25
V
222
265
mA
0.8
V
2
V
AC ELECTRICAL CHARACTERISTICS
(MAX9984 Typical Application Circuit, using component values in Table 1, VCC = +4.75V to +5.25V, RF and LO ports are driven from
50Ω sources, PLO = -3dBm to +3dBm, PRF = -5dBm, fRF = 815MHz to 1000MHz, fLO = 570MHz to 850MHz, fIF = 160MHz, fRF > fLO,
TC = -40°C to +85°C, unless otherwise noted. Typical values are at VCC = +5V, PRF = -5dBm, PLO = 0dBm, fRF = 910MHz, fLO =
750MHz, fIF = 160MHz, TC = +25°C, unless otherwise noted.) (Note 1)
PARAMETER
RF Frequency Range
LO Frequency Range
SYMBOL
fRF
fLO
CONDITIONS
MIN
815
(Notes 2, 3)
400
(Note 2)
570
(Notes 2, 3)
325
MAX9986
960
1180
250
fIF
(Note 2)
50
Conversion Gain
GC
fRF = 910MHz, fLO = 750MHz, TC = +25°C
7.2
Gain Variation Over Temperature
TC = -40°C to +85°C
Conversion Gain Flatness
Flatness over any one of three frequency bands:
fRF = 824MHz to 849MHz
fRF = 869MHz to 894MHz
fRF = 880MHz to 915MHz
Input Third-Order Intercept Point
2
P1dB
IIP3
MAX
(Note 2)
IF Frequency Range
Input Compression Point
TYP
(Note 4)
fLO = 570MHz to 850MHz, fIF = 160MHz,
PLO = 0dBm, TC = +25°C (Note 5)
19
Two tones:
fRF1 = 910MHz, fRF2 = 911MHz,
PRF = -5dBm/tone, fLO = 750MHz,
PLO = 0dBm, TC = +25°C
22
1000
UNITS
MHz
850
MHz
8.1
9.2
MHz
dB
-0.0079
dB/°C
±0.25
dB
13
dBm
dBm
25
_______________________________________________________________________________________
SiGe High-Linearity, 400MHz to 1000MHz
Downconversion Mixer with LO Buffer/Switch
(MAX9984 Typical Application Circuit, using component values in Table 1, VCC = +4.75V to +5.25V, RF and LO ports are driven from
50Ω sources, PLO = -3dBm to +3dBm, PRF = -5dBm, fRF = 815MHz to 1000MHz, fLO = 570MHz to 850MHz, fIF = 160MHz, fRF > fLO,
TC = -40°C to +85°C, unless otherwise noted. Typical values are at VCC = +5V, PRF = -5dBm, PLO = 0dBm, fRF = 910MHz, fLO =
750MHz, fIF = 160MHz, TC = +25°C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
Input IP3 Variation Over
Temperature
Noise Figure
NF
CONDITIONS
TC = +25°C to -40°C
-1.5
+0.8
Single sideband, fIF = 190MHz
PBLOCKER =
+8dBm
2RF-2LO
3x3
3RF-3LO
dB
dB
dB
24
0.25
dB
0.6
-3
2x2
UNITS
19
PBLOCKER =
+11dBm
LO Drive
Spurious Response at IF
MAX
9.3
PBLOCKER =
PFUNDAMENTAL = -5dBm +8dBm
fFUNDAMENTAL = 910MHz
PBLOCKER =
fBLOCKER = 911MHz
+11dBm
Small-Signal Compression
Under-Blocking Condition
TYP
TC = +25°C to +85°C
fRF = 900MHz (no signal)
fLO = 1090MHz
fBLOCKER = 981MHz
fIF = 190MHz
(Note 6)
Noise Figure Under-Blocking
MIN
PRF = -10dBm
+3
dBm
71
PRF = -5dBm
66
PRF = -10dBm
87
PRF = -5dBm
82
LO2 selected
47
54
LO1 selected
47
60
dBc
LO1 to LO2 Isolation
PLO = +3dBm
TC = +25°C (Note 5)
LO Leakage at RF Port
PLO = +3dBm
-32
dBm
LO Leakage at IF Port
PLO = +3dBm
-23
dBm
RF-to-IF Isolation
PLO = +3dBm
54
dB
LO Switching Time
50% of LOSEL to IF settled to within 2°
50
ns
14
dB
RF Port Return Loss
LO1/2 port selected,
LO2/1 and IF terminated
23
LO1/2 port unselected,
LO2/1 and IF terminated
20
LO driven at 0dBm, RF terminated into 50Ω,
differential 200Ω
16
LO Port Return Loss
IF Port Return Loss
dB
dB
dB
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
MAX9984
AC ELECTRICAL CHARACTERISTICS (continued)
Typical Operating Characteristics
(MAX9984 Typical Application Circuit, using component values in Table 1, VCC = +5.0V, PLO = 0dBm, PRF = -5dBm, fRF > fLO, fIF =
160MHz, unless otherwise noted.)
9
8
TC = +85°C
TC = +25°C
9
8
PLO = -3dBm, 0dBm, +3dBm
7
6
1000
1100
RF FREQUENCY (MHz)
INPUT IP3 vs. RF FREQUENCY
1000
MAX9984 toc04
27
PLO = -3dBm, 0dBm, +3dBm
26
1100
TC = +25°C
TC = -25°C
22
TC = -40°C
20
900
1000
23
21
20
19
700
12
11
NOISE FIGURE (dB)
9
8
TC = -40°C
TC = -25°C
6
1000
1100
5
800
900
RF FREQUENCY (MHz)
1000
900
1000
1100
NOISE FIGURE vs. RF FREQUENCY
10
9
8
800
RF FREQUENCY (MHz)
PLO = -3dBm, 0dBm, +3dBm
12
11
10
9
8
7
7
6
6
5
700
700
NOISE FIGURE vs. RF FREQUENCY
10
7
900
MAX9984 toc08
TC = +25°C
800
RF FREQUENCY (MHz)
MAX9984 toc07
TC = +85°C
VCC = 5.0V
22
21
NOISE FIGURE vs. RF FREQUENCY
11
VCC = 5.25V
23
22
RF FREQUENCY (MHz)
12
VCC = 4.75V
25
24
24
1100
1100
INPUT IP3 vs. RF FREQUENCY
NOISE FIGURE (dB)
800
1000
26
20
700
900
800
RF FREQUENCY (MHz)
INPUT IP3 (dBm)
24
21
MAX9984 toc03
700
25
INPUT IP3 (dBm)
25
INPUT IP3 (dBm)
900
800
INPUT IP3 vs. RF FREQUENCY
TC = +85°C
23
VCC = 4.75V, 5.0V, 5.25V
RF FREQUENCY (MHz)
27
26
8
6
700
MAX9984 toc05
900
800
9
7
6
700
4
10
MAX9984 toc09
7
10
CONVERSION GAIN (dB)
TC = -40°C
CONVERSION GAIN (dB)
TC = -25°C
CONVERSION GAIN vs. RF FREQUENCY
11
MAX9984 toc02
MAX9984 toc01
10
CONVERSION GAIN (dB)
CONVERSION GAIN vs. RF FREQUENCY
11
MAX9984 toc06
CONVERSION GAIN vs. RF FREQUENCY
11
NOISE FIGURE (dB)
MAX9984
SiGe High-Linearity, 400MHz to 1000MHz
Downconversion Mixer with LO Buffer/Switch
VCC = 4.75V, 5.0V, 5.25V
5
700
800
900
RF FREQUENCY (MHz)
1000
700
800
900
RF FREQUENCY (MHz)
_______________________________________________________________________________________
1000
SiGe High-Linearity, 400MHz to 1000MHz
Downconversion Mixer with LO Buffer/Switch
(MAX9984 Typical Application Circuit, using component values in Table 1, VCC = +5.0V, PLO = 0dBm, PRF = -5dBm, fRF > fLO, fIF =
160MHz, unless otherwise noted.)
60
TC = +25°C
55
TC = -25°C, -40°C
65
60
PLO = +3dBm
55
PLO = 0dBm
45
1000
1100
RF FREQUENCY (MHz)
MAX9984 toc13
85
TC = -40°C
TC = -25°C
TC = +25°C
65
55
1000
900
VCC = 5.25V
700
1000
1100
PLO = -3dBm, 0dBm, +3dBm
95
VCC = 5.25V
85
75
VCC = 4.75V
VCC = 5.0V
65
800
900
1000
1100
700
INPUT P1dB (dBm)
14
11
1000
1100
INPUT P1dB vs. RF FREQUENCY
13
12
900
15
MAX9984 toc17
15
800
RF FREQUENCY (MHz)
INPUT P1dB vs. RF FREQUENCY
12
1100
PRF = -5dBm
RF FREQUENCY (MHz)
13
1000
55
700
MAX9984 toc16
TC = +25°C
TC = +85°C
900
3RF-3LO RESPONSE vs. RF FREQUENCY
75
65
800
RF FREQUENCY (MHz)
85
INPUT P1dB vs. RF FREQUENCY
TC = -25°C
55
1100
14
INPUT P1dB (dBm)
800
15
INPUT P1dB (dBm)
900
PRF = -5dBm
RF FREQUENCY (MHz)
14
800
55
700
60
3RF-3LO RESPONSE vs. RF FREQUENCY
95
3RF-3LO RESPONSE (dBc)
3RF-3LO RESPONSE (dBc)
TC = +85°C
75
65
RF FREQUENCY (MHz)
3RF-3LO RESPONSE vs. RF FREQUENCY
PRF = -5dBm
VCC = 5.0V
70
45
700
3RF-3LO RESPONSE (dBc)
900
MAX9984 toc14
800
VCC = 4.75V
50
45
700
PRF = -5dBm
75
50
MAX9984 toc12
70
50
95
PLO = -3dBm
MAX9984 toc15
65
PRF = -5dBm
2RF-2LO RESPONSE (dBc)
TC = +85°C
2RF-2LO RESPONSE vs. RF FREQUENCY
80
PLO = -3dBm, 0dBm, +3dBm
11
MAX9984 toc18
MAX9984 toc10
PRF = -5dBm
2RF-2LO RESPONSE (dBc)
2RF-2LO RESPONSE (dBc)
70
2RF-2LO RESPONSE vs. RF FREQUENCY
75
MAX9984 toc11
2RF-2LO RESPONSE vs. RF FREQUENCY
75
VCC = 5.25V
13
12
VCC = 5.0V
VCC = 4.75V
11
TC = -40°C
10
10
9
10
9
700
800
900
1000
RF FREQUENCY (MHz)
1100
9
700
800
900
1000
RF FREQUENCY (MHz)
1100
700
800
900
1000
1100
RF FREQUENCY (MHz)
_______________________________________________________________________________________
5
MAX9984
Typical Operating Characteristics (continued)
Typical Operating Characteristics (continued)
(MAX9984 Typical Application Circuit, using component values in Table 1, VCC = +5.0V, PLO = 0dBm, PRF = -5dBm, fRF > fLO, fIF =
160MHz, unless otherwise noted.)
LO SWITCH ISOLATION
vs. LO FREQUENCY
TC = +85°C
TC = +25°C
45
40
MAX9984 toc20
55
50
PLO = -3dBm, 0dBm, +3dBm
45
40
640
740
840
940
VCC = 4.75V, 5.0V, 5.25V
50
45
40
540
640
740
840
940
540
640
LO FREQUENCY (MHz)
LO LEAKAGE AT IF PORT
vs. LO FREQUENCY
LO LEAKAGE AT IF PORT
vs. LO FREQUENCY
LO LEAKAGE AT IF PORT
vs. LO FREQUENCY
-10
MAX9984 toc22
TC = -25°C, -40°C
-15
-10
-15
VCC = 5.0V
-15
-20
TC = +85°C
-25
TC = +25°C
-30
-35
-20
-25
PLO = -3dBm
-30
740
840
940
-25
-30
VCC = 4.75V
-40
-40
640
-20
-35
-35
-40
540
640
740
840
540
940
640
740
840
LO FREQUENCY (MHz)
LO FREQUENCY (MHz)
LO FREQUENCY (MHz)
LO LEAKAGE AT RF PORT
vs. LO FREQUENCY
LO LEAKAGE AT RF PORT
vs. LO FREQUENCY
LO LEAKAGE AT RF PORT
vs. LO FREQUENCY
TC = -25°C, -40°C
-30
-40
TC = +25°C
-30
PLO = -3dBm, 0dBm, +3dBm
-40
940
MAX9984 toc27
MAX9984 toc26
-20
-10
LO LEAKAGE AT RF PORT (dBm)
-20
-10
LO LEAKAGE AT RF PORT (dBm)
MAX9984 toc25
-10
940
VCC = 5.25V
LO LEAKAGE (dBm)
LO LEAKAGE (dBm)
PLO = 0dBm, +3dBm
LO LEAKAGE (dBm)
840
LO FREQUENCY (MHz)
-10
540
740
LO FREQUENCY (MHz)
MAX9984 toc23
540
55
MAX9984 toc24
55
60
LO SWITCH ISOLATION (dB)
LO SWITCH ISOLATION (dB)
LO SWITCH ISOLATION (dB)
TC = -25°C, -40°C
50
60
MAX9984 toc19
60
LO SWITCH ISOLATION
vs. LO FREQUENCY
MAX9984 toc21
LO SWITCH ISOLATION
vs. LO FREQUENCY
LO LEAKAGE AT RF PORT (dBm)
MAX9984
SiGe High-Linearity, 400MHz to 1000MHz
Downconversion Mixer with LO Buffer/Switch
-20
-30
VCC = 4.75V, 5.0V, 5.25V
-40
TC = +85°C
-50
-50
540
640
740
840
LO FREQUENCY (MHz)
6
940
-50
540
640
740
840
LO FREQUENCY (MHz)
940
540
640
740
840
LO FREQUENCY (MHz)
_______________________________________________________________________________________
940
SiGe High-Linearity, 400MHz to 1000MHz
Downconversion Mixer with LO Buffer/Switch
(MAX9984 Typical Application Circuit, using component values in Table 1, VCC = +5.0V, PLO = 0dBm, PRF = -5dBm, fRF > fLO, fIF =
160MHz, unless otherwise noted.)
RF-TO-IF ISOLATION
vs. RF FREQUENCY
50
45
40
TC = +25°C
50
45
40
PLO = -3dBm, 0dBm, +3dBm
35
TC = +85°C TC = -25°C
30
800
900
1000
1100
50
45
40
VCC = 5.0V
VCC = 5.25V
30
700
800
900
1100
1000
700
800
900
1000
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
RF PORT RETURN LOSS
vs. RF FREQUENCY
IF PORT RETURN LOSS
vs. IF FREQUENCY
LO SELECTED RETURN LOSS
vs. LO FREQUENCY
PLO = -3dBm, 0dBm, +3dBm
10
15
20
25
10
VCC = 4.75V, 5.0V, 5.25V
15
20
25
30
1000
1100
50
100
RF FREQUENCY (MHz)
150
200
250
30
PLO = -3dBm
40
350
300
540
640
240
VCC = 5.25V
SUPPLY CURRENT (mA)
5
740
840
940
LO FREQUENCY (MHz)
SUPPLY CURRENT
vs. TEMPERATURE (TC)
MAX9984 toc34
0
LO UNSELECTED RETURN LOSS (dB)
PLO = 0dBm
20
IF FREQUENCY (MHz)
LO UNSELECTED RETURN LOSS
vs. LO FREQUENCY
10
15
PLO = +3dBm
PLO = -3dBm, 0dBm, +3dBm
20
MAX9984 toc35
900
10
50
30
800
MAX9984 toc33
LO SELECTED RETURN LOSS (dB)
5
IF PORT RETURN LOSS (dB)
5
1100
0
MAX9984 toc32
0
MAX9984 toc31
0
700
VCC = 4.75V
35
30
700
RF PORT RETURN LOSS (dB)
55
RF-TO-IF ISOLATION (dB)
55
RF-TO-IF ISOLATION (dB)
RF-TO-IF ISOLATION (dB)
55
60
MAX9984 toc29
TC = -40°C
35
60
MAX9984 toc28
60
RF-TO-IF ISOLATION
vs. RF FREQUENCY
MAX9984 toc30
RF-TO-IF ISOLATION
vs. RF FREQUENCY
230
220
210
VCC = 4.75V
25
VCC = 5.0V
200
30
540
640
740
840
LO FREQUENCY (MHz)
940
-40
-15
10
35
60
85
TEMPERATURE (°C)
_______________________________________________________________________________________
7
MAX9984
Typical Operating Characteristics (continued)
Typical Operating Characteristics
(MAX9984 Typical Application Circuit, using component values in Table 2, VCC = +5.0V, PLO = 0dBm, PRF = -5dBm, fIF = 75MHz,
unless otherwise noted.)
25
TC = -40°C
INPUT IP3 (dBm)
24
8
7
LOW-SIDE INJECTION, fRF > fLO
TC = -25°C
TC = +85°C
TC = -25°C
23
22
21
TC = +25°C
TC = +25°C
6
70
65
LOW-SIDE INJECTION,
fRF > fLO
PRF = -5dBm
60
TC = +85°C
TC = +25°C
55
50
TC = -25°C, -40°C
20
TC = -40°C
TC = +85°C
19
5
400
440
460
480
45
400
500
420
440
460
480
400
500
420
440
460
480
500
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
3RF-3LO RESPONSE vs. RF FREQUENCY
(TUNED FOR 400MHz TO 500MHz RF FREQUENCY)
RF PORT RETURN LOSS vs. RF FREQUENCY
(TUNED FOR 400MHz TO 500MHz RF FREQUENCY)
IF PORT RETURN LOSS vs. IF FREQUENCY
(TUNED FOR 400MHz TO 500MHz RF FREQUENCY)
TC = -25°C, -40°C
45
0
MAX9984 toc40
MAX9984 toc39
5
VCC = 5.0V, PLO = 0dBm, TC = +25°C
LOW-SIDE INJECTION, fRF > fLO
IF PORT RETURN LOSS (dB)
55
0
RF PORT RETURN LOSS (dB)
65
LOW-SIDE INJECTION, fRF > fLO
PRF = -5dBm
TC = +25°C
TC = +85°C
10
15
20
MAX9984 toc41
RF FREQUENCY (MHz)
75
3RF-3LO RESPONSE (dBc)
420
MAX9984 toc38
9
CONVERSION GAIN (dB)
26
2RF-2LO RESPONSE (dBc)
LOW-SIDE INJECTION, fRF > fLO
MAX9984 toc37
10
2RF-2LO RESPONSE vs. RF FREQUENCY
(TUNED FOR 400MHz TO 500MHz RF FREQUENCY)
INPUT IP3 vs. RF FREQUENCY
(TUNED FOR 400MHz TO 500MHz RF FREQUENCY)
MAX9984 toc36
CONVERSION GAIN vs. RF FREQUENCY
(TUNED FOR 400MHz TO 500MHz RF FREQUENCY)
VCC = 5.0V, PLO = 0dBm, TC = +25°C
LOW-SIDE INJECTION, fRF > fLO
10
20
30
25
30
35
400
420
440
460
480
420
440
460
480
50
500
100
150
200
LO SELECTED RETURN LOSS vs. LO FREQUENCY
(TUNED FOR 400MHz TO 500MHz RF FREQUENCY)
LO UNSELECTED RETURN LOSS vs. LO FREQUENCY
(TUNED FOR 400MHz TO 500MHz RF FREQUENCY)
CONVERSION GAIN vs. RF FREQUENCY
(TUNED FOR 400MHz TO 500MHz RF FREQUENCY)
15
20
25
10
15
20
325
345
365
385
LO FREQUENCY (MHz)
405
425
HIGH-SIDE INJECTION, fLO > fRF
TC = -40°C
9
8
TC = -25°C
7
TC = +25°C
TC = +85°C
6
25
5
30
30
10
MAX9984 toc43
5
VCC = 5.0V, PLO = 0dBm, TC = +25°C
LOW-SIDE INJECTION, fRF > fLO
CONVERSION GAIN (dB)
10
0
LO UNSELECTED RETURN LOSS (dB)
5
VCC = 5.0V, PLO = 0dBm, TC = +25°C
LOW-SIDE INJECTION, fRF > fLO
MAX9984 toc44
IF FREQUENCY (MHz)
MAX9984 toc42
RF FREQUENCY (MHz)
0
8
40
400
500
RF FREQUENCY (MHz)
LO SELECTED RETURN LOSS (dB)
MAX9984
SiGe High-Linearity, 400MHz to 1000MHz
Downconversion Mixer with LO Buffer/Switch
325
345
365
385
LO FREQUENCY (MHz)
405
425
400
420
440
460
RF FREQUENCY (MHz)
_______________________________________________________________________________________
480
500
SiGe High-Linearity, 400MHz to 1000MHz
Downconversion Mixer with LO Buffer/Switch
TC = -25°C
TC = +25°C
INPUT IP3 (dBm)
75
2LO-2RF RESPONSE (dBc)
TC = +85°C
23
22
21
20
TC = -40°C
19
HIGH-SIDE INJECTION, fLO > fRF
PRF = -5dBm
TC = -25°C
TC = +25°C, +85°C
70
75
65
65
60
TC = -40°C
55
TC = -40°C
45
55
50
18
400
420
HIGH-SIDE INJECTION, fLO > fRF
PRF = -5dBm
TC = -25°C
TC = +25°C
TC = +85°C
MAX9984 toc47
24
80
3LO-3RF RESPONSE (dBc)
HIGH-SIDE INJECTION, fLO > fRF
MAX9984 toc45
25
3LO-3RF RESPONSE vs. RF FREQUENCY
(TUNED FOR 400MHz TO 500MHz RF FREQUENCY)
MAX9984 toc46
2LO-2RF RESPONSE vs. RF FREQUENCY
(TUNED FOR 400MHz TO 500MHz RF FREQUENCY)
INPUT IP3 vs. RF FREQUENCY
(TUNED FOR 400MHz TO 500MHz RF FREQUENCY)
440
460
480
35
400
500
420
440
460
480
400
500
420
440
460
480
500
RF FREQUENCY (MHz)
RF PORT RETURN LOSS vs. RF FREQUENCY
(TUNED FOR 400MHz TO 500MHz RF FREQUENCY)
IF PORT RETURN LOSS vs. IF FREQUENCY
(TUNED FOR 400MHz TO 500MHz RF FREQUENCY)
LO SELECTED RETURN LOSS vs. LO FREQUENCY
(TUNED FOR 400MHz TO 500MHz RF FREQUENCY)
10
15
20
VCC = 5.0V, PLO = 0dBm, TC = +25°C
HIGH-SIDE INJECTION, fLO > fRF
10
20
30
25
30
440
460
480
50
500
VCC = 5.0V, PLO = 0dBm, TC = +25°C
HIGH-SIDE INJECTION, fLO > fRF
10
15
20
25
100
150
200
IF FREQUENCY (MHz)
RF FREQUENCY (MHz)
475
495
515
535
555
575
LO FREQUENCY (MHz)
LO UNSELECTED RETURN LOSS vs. LO FREQUENCY
(TUNED FOR 400MHz TO 500MHz RF FREQUENCY)
0
5
MAX9984 toc51
420
5
30
40
400
0
LO SELECTED RETURN LOSS (dB)
IF PORT RETURN LOSS (dB)
VCC = 5.0V, PLO = 0dBm, TC = +25°C
HIGH-SIDE INJECTION, fRF > fLO
LO UNSELECTED RETURN LOSS (dB)
RF PORT RETURN LOSS (dB)
5
0
MAX9984 toc48
0
MAX9984 toc50
RF FREQUENCY (MHz)
MAX9984 toc49
RF FREQUENCY (MHz)
VCC = 5.0V, PLO = 0dBm, TC = +25°C
HIGH-SIDE INJECTION, fLO > fRF
10
15
20
25
30
475
495
515
535
555
575
LO FREQUENCY (MHz)
_______________________________________________________________________________________
9
MAX9984
Typical Operating Characteristics (continued)
(MAX9984 Typical Application Circuit, using component values in Table 2, VCC = +5.0V, PLO = 0dBm, PRF = -5dBm, fIF = 75MHz,
unless otherwise noted.)
MAX9984
SiGe High-Linearity, 400MHz to 1000MHz
Downconversion Mixer with LO Buffer/Switch
Pin Description
PIN
NAME
FUNCTION
Power-Supply Connection. Bypass each VCC pin to GND with capacitors as shown in the Typical
Application Circuit.
1, 6, 8, 14
VCC
2
RF
Single-Ended 50Ω RF Input. This port is internally matched and DC shorted to GND through a balun.
Requires an external DC-blocking capacitor.
3
TAP
Center Tap of the Internal RF Balun. Bypass to GND with capacitors close to the IC, as shown in the
Typical Application Circuit.
4, 5, 10, 12,
13, 17
GND
Ground
7
LOBIAS
9
LOSEL
11
LO1
Local Oscillator Input 1. Drive LOSEL low to select LO1.
15
LO2
Local Oscillator Input 2. Drive LOSEL high to select LO2.
16
LEXT
External Inductor Connection. Connect a low-ESR, 47nH inductor from LEXT to GND. This inductor
carries approximately 140mA DC current.
18, 19
IF-, IF+
Differential IF Outputs. Each output requires external bias to VCC through an RF choke (see the
Typical Application Circuit).
20
IFBIAS
IF Bias Resistor Connection for IF Amplifier. Connect a 953Ω ±1% resistor from IFBIAS to GND.
EP
GND
Bias Resistor for Internal LO Buffer. Connect a 619Ω ±1% resistor from LOBIAS to the power supply.
Local Oscillator Select. Logic control input for selecting LO1 or LO2.
Exposed Ground Paddle. Solder the exposed paddle to the ground plane using multiple vias.
Detailed Description
The MAX9984 high-linearity downconversion mixer
provides 8.1dB of conversion gain and +25dBm of
IIP3, with a typical 9.3dB noise figure. The integrated
baluns and matching circuitry allow for 50Ω singleended interfaces to the RF and the two LO ports. A single-pole, double-throw (SPDT) switch provides 50ns
switching time between the two LO inputs with 54dB of
LO-to-LO isolation. Furthermore, the integrated LO
buffer provides a high drive level to the mixer core,
reducing the LO drive required at the MAX9984’s
inputs to a -3dBm to +3dBm range. The IF port incorporates a differential output, which is ideal for providing enhanced IIP2 performance.
Specifications are guaranteed over broad frequency
ranges to allow for use in cellular band GSM,
cdma2000, iDEN, and W-CDMA 2G/2.5G/3G base stations. The MAX9984 is optimized to operate over a
815MHz to 1000MHz RF frequency range, a 570MHz to
850MHz LO frequency range, and a 50MHz to 250MHz
IF frequency range. Operation beyond these ranges is
possible; see the Typical Operating Characteristics for
additional details. For operation at a 400MHz to
500MHz RF frequency range, see the Typical
Operating Characteristics and Table 2 for details.
10
RF Input and Balun
The MAX9984 RF input is internally matched to 50Ω,
requiring no external matching components. A DCblocking capacitor is required because the input is internally DC shorted to ground through the on-chip balun.
LO Inputs, Buffer, and Balun
The MAX9984 is ideally suited for low-side LO injection
applications with an optimized 570MHz to 850MHz LO
frequency range. Appropriate tuning allows for an LO
frequency range below 570MHz (RF frequency below
815MHz). For a device with a 960MHz to 1180MHz LO
frequency range, refer to the MAX9986 data sheet. As
an added feature, the MAX9984 includes an internal LO
SPDT switch that can be used for frequency-hopping
applications. The switch selects one of the two singleended LO ports, allowing the external oscillator to settle
on a particular frequency before it is switched in. LO
switching time is typically less than 50ns, which is more
than adequate for virtually all GSM applications. If frequency hopping is not employed, set the switch to
either of the LO inputs. The switch is controlled by a
digital input (LOSEL): logic-high selects LO2, logic-low
selects LO1. To avoid damage to the part, voltage must
be applied to VCC before digital logic is applied to
LOSEL. LO1 and LO2 inputs are internally matched to
50Ω, requiring only a 82pF DC-blocking capacitor.
______________________________________________________________________________________
SiGe High-Linearity, 400MHz to 1000MHz
Downconversion Mixer with LO Buffer/Switch
High-Linearity Mixer
The core of the MAX9984 is a double-balanced, highperformance passive mixer. Exceptional linearity is provided by the large LO swing from the on-chip LO
buffer. When combined with the integrated IF amplifiers, the cascaded IIP3, 2RF-2LO rejection, and NF
performance is typically 25dBm, 71dBc, and 9.3dB,
respectively.
Differential IF Output Amplifier
The MAX9984 mixer has a 50MHz to 250MHz IF frequency range. The differential, open-collector IF output
ports require external pullup inductors to VCC. Note that
these differential outputs are ideal for providing
enhanced 2RF-2LO rejection performance. Singleended IF applications require a 4:1 balun to transform
the 200Ω differential output impedance to a 50Ω singleended output.
Applications Information
Input and Output Matching
The RF and LO inputs are internally matched to 50Ω. No
matching components are required for an 815MHz to
1000MHz RF frequency range. RF and LO inputs
require only DC-blocking capacitors for interfacing.
The IF output impedance is 200Ω (differential). For
evaluation, an external low-loss 4:1 (impedance ratio)
balun transforms this impedance down to a 50Ω singleended output (see the Typical Application Circuit).
Capacitor CP is used at the RF input port to tune the
mixer down to operate in the 400MHz to 500MHz RF
frequency range (see Table 2). Operation between
500MHz to 815MHz would require a smaller capacitor
CP. Contact the factory for details.
LEXT Inductor
LEXT serves to improve the LO-to-IF and RF-to-IF leakage. The inductance value can be adjusted by the user to
optimize the performance for a particular frequency
band. Since approximately 140mA flows through this
inductor, it is important to use a low-DCR wire-wound coil.
If the LO-to-IF and RF-to-IF leakage are not critical
parameters, the inductor can be replaced by a short
circuit to ground.
Layout Considerations
A properly designed PC board is an essential part of
any RF/microwave circuit. Keep RF signal lines as short
as possible to reduce losses, radiation, and inductance. For the best performance, route the ground pin
traces directly to the exposed pad under the package.
The PC board exposed pad MUST be connected to the
ground plane of the PC board. It is suggested that multiple vias be used to connect this pad to the lower-level
ground planes. This method provides a good RF/thermal conduction path for the device. Solder the exposed
pad on the bottom of the device package to the PC
board. The MAX9984 evaluation kit can be used as a
reference for board layout. Gerber files are available
upon request at www.maxim-ic.com.
Power-Supply Bypassing
Proper voltage-supply bypassing is essential for highfrequency circuit stability. Bypass each VCC pin and
TAP with the capacitors shown in the Typical Application
Circuit; see Table 1. Place the TAP bypass capacitor to
ground within 100 mils of the TAP pin.
Exposed Pad RF/Thermal Considerations
The exposed paddle (EP) of the MAX9984’s 20-pin thin
QFN-EP package provides a low thermal-resistance
path to the die. It is important that the PC board on
which the MAX9984 is mounted be designed to conduct heat from the EP. In addition, provide the EP with
a low-inductance path to electrical ground. The EP
MUST be soldered to a ground plane on the PC board,
either directly or through an array of plated via holes.
Bias Resistors
Bias currents for the LO buffer and the IF amplifier are
optimized by fine tuning resistors R1 and R2. If
reduced current is required at the expense of performance, contact the factory for details. If the ±1% bias
resistor values are not readily available, substitute standard ±5% values.
Chip Information
TRANSISTOR COUNT: 1017
PROCESS: SiGe BiCMOS
______________________________________________________________________________________
11
MAX9984
A two-stage internal LO buffer allows a wide input
power range for the LO drive. All guaranteed specifications are for an LO signal power from -3dBm to +3dBm.
The on-chip low-loss balun, along with an LO buffer,
drives the double-balanced mixer. All interfacing and
matching components from the LO inputs to the IF outputs are integrated on-chip.
MAX9984
SiGe High-Linearity, 400MHz to 1000MHz
Downconversion Mixer with LO Buffer/Switch
Table 1. Component List Referring to the Typical Application Circuit for 815MHz to
1000MHz RF Frequency Operation
COMPONENT
VALUE
DESCRIPTION
L1, L2
330nH
Wire-wound high-Q inductors (0805)
L3
47nH
Wire-wound high-Q inductor (0603)
C1
10pF
Microwave capacitor (0603)
C2, C4, C7, C8, C10, C11, C12
82pF
Microwave capacitors (0603)
C3, C5, C6, C9, C13, C14
0.01µF
Microwave capacitors (0603)
C15
220pF
Microwave capacitor (0402)
R1
953Ω
±1% resistor (0603)
R2
619Ω
±1% resistor (0603)
R3
3.57Ω
±1% resistor (1206)
T1
4:1 balun
IF balun (TC4-1W-7A)
U1
MAX9984
Maxim IC
Table 2. Component List Referring to the Typical Application Circuit for 400MHz to
995MHz RF Frequency Operation
12
COMPONENT
VALUE
DESCRIPTION
L1, L2
820nH
Wire-wound high-Q inductors (0805)
L3
47nH
Wire-wound high-Q inductor (0603)
CP
7pF
Microwave capacitor (0603)
C1
56pF
Microwave capacitor (0603)
C2, C4, C7, C8, C10,
C11, C12
220pF
Microwave capacitors (0603)
C3, C5, C6, C9, C13, C14
10nF
Microwave capacitors (0603)
C15
220pF
Microwave capacitor (0402)
R1
953Ω
±1% resistor (0603)
R2
619Ω
±1% resistor (0603)
R3
3.57Ω
±1% resistor (1206)
T1
4:1 balun
IF balun (TC4-1W-7A)
U1
MAX9984
Maxim IC
______________________________________________________________________________________
SiGe High-Linearity, 400MHz to 1000MHz
Downconversion Mixer with LO Buffer/Switch
IFBIAS
IF+
IF-
GND
LEXT
20
19
18
17
16
VCC 1
15 LO2
RF 2
MAX9984
14 VCC
11 LO1
6
7
8
9
10
GND
GND 5
LOSEL
12 GND
VCC
GND 4
LOBIAS
13 GND
VCC
TAP 3
THIN QFN
______________________________________________________________________________________
13
MAX9984
Pin Configuration/Functional Diagram
MAX9984
SiGe High-Linearity, 400MHz to 1000MHz
Downconversion Mixer with LO Buffer/Switch
Typical Application Circuit
VCC
T1
3
IF
OUTPUT
6
R3
L1
2
L2
C14
C3
C2
GND
IF-
IF+
19
20
VCC
18
17
RF
CP*
C5
TAP
C4
GND
16
C12
1
15
C1
RF
INPUT
4
L3
IFBIAS
VCC
1
C15
R1
LEXT
C13
MAX9984
2
14
3
13
4
12
5
11
LO2
LO2
INPUT
VCC
VCC
C11
GND
GND
C10
LOSEL
LOBIAS
VCC
9
LO1
10
GND
8
7
6
VCC
GND
R2
VCC
C6
LOSEL
INPUT
C7
C8
VCC
C9
*CP NEEDED FOR 400MHz TO 500MHz RF FREQUENCY OPERATION. SEE TABLE 2.
14
______________________________________________________________________________________
LO1
INPUT
SiGe High-Linearity, 400MHz to 1000MHz
Downconversion Mixer with LO Buffer/Switch
QFN THIN.EPS
D2
D
MARKING
b
C
L
0.10 M C A B
D2/2
D/2
k
L
XXXXX
E/2
E2/2
C
L
(NE-1) X e
E
DETAIL A
PIN # 1
I.D.
E2
PIN # 1 I.D.
0.35x45°
e/2
e
(ND-1) X e
DETAIL B
e
L1
L
C
L
C
L
L
L
e
e
0.10 C
A
C
0.08 C
A1 A3
PACKAGE OUTLINE,
16, 20, 28, 32, 40L THIN QFN, 5x5x0.8mm
21-0140
-DRAWING NOT TO SCALE-
COMMON DIMENSIONS
A1
A3
b
D
E
e
k
L
L1
N
ND
NE
JEDEC
0.70 0.75 0.80 0.70 0.75 0.80 0.70 0.75 0.80 0.70 0.75 0.80 0.70 0.75 0.80
0
0.02 0.05
0.20 REF.
0.25 0.30 0.35
4.90 5.00 5.10
4.90 5.00 5.10
0.80 BSC.
0.25 -
0
0.02 0.05
0
0.02 0.05
0
0.02 0.05
0.20 REF.
0.20 REF.
0.20 REF.
0.25 0.30 0.35 0.20 0.25 0.30 0.20 0.25 0.30
4.90 5.00 5.10 4.90 5.00 5.10 4.90 5.00 5.10
4.90 5.00 5.10 4.90 5.00 5.10 4.90 5.00 5.10
0.50 BSC.
0.65 BSC.
0.50 BSC.
- 0.25 - 0.25
0.25 -
0
0.02 0.05
0.20 REF.
0.15 0.20 0.25
4.90 5.00 5.10
4.90 5.00 5.10
0.40 BSC.
0.25 0.35 0.45
0.30 0.40 0.50 0.45 0.55 0.65 0.45 0.55 0.65 0.30 0.40 0.50 0.40 0.50 0.60
- 0.30 0.40 0.50
16
4
4
20
5
5
WHHB
WHHC
1
2
EXPOSED PAD VARIATIONS
PKG.
16L 5x5
20L 5x5
28L 5x5
32L 5x5
40L 5x5
SYMBOL MIN. NOM. MAX. MIN. NOM. MAX. MIN. NOM. MAX. MIN. NOM. MAX. MIN. NOM. MAX.
A
H
28
7
7
WHHD-1
32
8
8
40
10
10
WHHD-2
-----
NOTES:
1. DIMENSIONING & TOLERANCING CONFORM TO ASME Y14.5M-1994.
2. ALL DIMENSIONS ARE IN MILLIMETERS. ANGLES ARE IN DEGREES.
3. N IS THE TOTAL NUMBER OF TERMINALS.
4. THE TERMINAL #1 IDENTIFIER AND TERMINAL NUMBERING CONVENTION SHALL
CONFORM TO JESD 95-1 SPP-012. DETAILS OF TERMINAL #1 IDENTIFIER ARE
OPTIONAL, BUT MUST BE LOCATED WITHIN THE ZONE INDICATED. THE TERMINAL #1
IDENTIFIER MAY BE EITHER A MOLD OR MARKED FEATURE.
5. DIMENSION b APPLIES TO METALLIZED TERMINAL AND IS MEASURED BETWEEN
0.25 mm AND 0.30 mm FROM TERMINAL TIP.
D2
L
E2
PKG.
CODES
MIN.
NOM. MAX.
T1655-1
T1655-2
T1655N-1
3.00
3.00
3.00
3.10 3.20 3.00
3.10 3.20 3.00
3.10 3.20 3.00
3.10
3.10
3.10
3.20
3.20
3.20
T2055-2
T2055-3
T2055-4
3.00
3.00
3.00
3.10 3.20 3.00
3.10 3.20 3.00
3.10 3.20 3.00
3.10
3.10
3.10
3.20
3.20
3.20
T2055-5
T2855-1
T2855-2
T2855-3
T2855-4
T2855-5
T2855-6
T2855-7
T2855-8
T2855N-1
T3255-2
T3255-3
T3255-4
T3255N-1
3.15
3.15
2.60
3.15
2.60
2.60
3.15
2.60
3.15
3.15
3.00
3.00
3.00
3.00
3.25
3.25
2.70
3.25
2.70
2.70
3.25
2.70
3.25
3.25
3.10
3.10
3.10
3.10
3.15
3.15
2.60
3.15
2.60
2.60
3.15
2.60
3.15
3.15
3.00
3.00
3.00
3.00
3.25
3.25
2.70
3.25
2.70
2.70
3.25
2.70
3.25
3.25
3.10
3.10
3.10
3.10
3.35
3.35
2.80
3.35
2.80
2.80
3.35
2.80
3.35
3.35
3.20
3.20
3.20
3.20
T4055-1
3.20
3.30 3.40 3.20
3.30
3.40
3.35
3.35
2.80
3.35
2.80
2.80
3.35
2.80
3.35
3.35
3.20
3.20
3.20
3.20
MIN.
NOM. MAX.
±0.15
**
**
**
**
**
**
0.40
DOWN
BONDS
ALLOWED
NO
YES
NO
NO
YES
NO
YES
**
NO
NO
YES
YES
NO
**
**
0.40
**
**
**
**
**
NO
YES
YES
NO
NO
YES
NO
NO
**
YES
**
**
**
**
** SEE COMMON DIMENSIONS TABLE
6. ND AND NE REFER TO THE NUMBER OF TERMINALS ON EACH D AND E SIDE RESPECTIVELY.
7. DEPOPULATION IS POSSIBLE IN A SYMMETRICAL FASHION.
8. COPLANARITY APPLIES TO THE EXPOSED HEAT SINK SLUG AS WELL AS THE TERMINALS.
9. DRAWING CONFORMS TO JEDEC MO220, EXCEPT EXPOSED PAD DIMENSION FOR T2855-1,
T2855-3, AND T2855-6.
10. WARPAGE SHALL NOT EXCEED 0.10 mm.
11. MARKING IS FOR PACKAGE ORIENTATION REFERENCE ONLY.
12. NUMBER OF LEADS SHOWN ARE FOR REFERENCE ONLY.
13. LEAD CENTERLINES TO BE AT TRUE POSITION AS DEFINED BY BASIC DIMENSION "e", ±0.05.
PACKAGE OUTLINE,
16, 20, 28, 32, 40L THIN QFN, 5x5x0.8mm
21-0140
-DRAWING NOT TO SCALE-
H
2
2
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 15
© 2005 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products, Inc.
MAX9984
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)