The MAX19996A single, high-linearity downconversion
mixer provides 8.7dB conversion gain, +24.5dBm IIP3,
and 9.8dB noise figure for 2000MHz to 3900MHz WCS,
LTE, WiMAX™, and MMDS wireless infrastructure applications. With an ultra-wide LO frequency range of
2100MHz to 4000MHz, the MAX19996A can be used in
either low-side or high-side LO injection architectures
for virtually all 2.5GHz and 3.5GHz applications. For a
2.5GHz variant tuned specifically for low-side injection,
refer to the MAX19996 data sheet.
In addition to offering excellent linearity and noise
performance, the MAX19996A also yields a high level
of component integration. This device includes a double-balanced passive mixer core, an IF amplifier, and
an LO buffer. On-chip baluns are also integrated to
allow for single-ended RF and LO inputs. The
MAX19996A requires a nominal LO drive of 0dBm,
and supply current is typically 230mA at V
CC
= 5.0V,
or 150mA at VCC= 3.3V.
The MAX19996A is pin compatible with the MAX19996
2000MHz to 3000MHz mixer. The device is also pin
similar with the MAX9984/MAX9986/MAX9986A
400MHz to 1000MHz mixers and the MAX9993/
MAX9994/MAX9996 1700MHz to 2200MHz mixers,
making this entire family of downconverters ideal for
applications where a common PCB layout is used for
multiple frequency bands.
The MAX19996A is available in a compact 5mm x 5mm,
20-pin thin QFN with an exposed pad. Electrical performance is guaranteed over the extended -40°C to
+85°C temperature range.
Applications
2.3GHz WCS Base Stations
2.5GHz WiMAX and LTE Base Stations
2.7GHz MMDS Base Stations
3.5GHz WiMAX and LTE Base Stations
Fixed Broadband Wireless Access
Wireless Local Loop
Private Mobile Radios
Military Systems
Features
♦ 2000MHz to 3900MHz RF Frequency Range
♦ 2100MHz to 4000MHz LO Frequency Range
♦ 50MHz to 500MHz IF Frequency Range
♦ 8.7dB Conversion Gain
♦ 9.8dB Noise Figure
♦ +24.5dBm Typical Input IP3
♦ 11dBm Typical Input 1dB Compression Point
♦ 67dBc Typical 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
♦ Pin Compatible with the MAX19996 2000MHz to
3000MHz Mixer
♦ Pin Similar with the MAX9993/MAX9994/MAX9996
Series of 1700MHz to 2200MHz Mixers and the
MAX9984/MAX9986/MAX9986A Series of 400MHz
to 1000MHz Mixers
♦ Single 5.0V or 3.3V Supply
♦ External Current-Setting Resistors Provide Option
for Operating Device in Reduced-Power/ReducedPerformance Mode
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.
VCCto GND...........................................................-0.3V to +5.5V
IF+, IF-, LO to GND ....................................-0.3V to (V
CC
+ 0.3V)
RF, LO Input Power ........................................................+12dBm
RF, LO Current (RF and LO is DC shorted to GND
through a balun)...............................................................50mA
Continuous Power Dissipation (Note 1) ...............................5.0W
5.0V SUPPLY AC ELECTRICAL CHARACTERISTICS—fRF= 2300MHz TO 2900MHz,
HIGH-SIDE LO INJECTION
(
Typical Application Circuit
with tuning elements outlined in Table 1, VCC= 4.75V to 5.25V, RF and LO ports are driven from 50Ω
sources, P
LO
= -3dBm to +3dBm, PRF= -5dBm, fRF= 2300MHz to 2900MHz, fIF= 300MHz, fLO= 2600MHz to 3200MHz, fRF< fLO,
T
C
= -40°C to +85°C. Typical values are for TC= +25°C, VCC= 5.0V, PLO= 0dBm, fRF= 2600MHz, fLO= 2900MHz, fIF= 300MHz.
All parameters are guaranteed by design and characterization, unless otherwise noted.) (Note 6)
RF Frequency Range
LO Frequencyf
IF Frequencyf
LO DriveP
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Typical Application Circuit with C1 = 8.2pF,
f
RF
LO
see Table 1 for details (Note 5)
Typical Application Circuit with C1 = 1.5pF,
see Table 1 for details (Note 5)
(Note 5)21004000MHz
Using Mini-Circuits TC4-1W-17 4:1
transformer as defined in the TypicalApplication Circuit, IF matching
components affect the IF frequency range
(Note 5)
IF
Using Mini-Circuits TC4-1W-7A 4:1
transformer as defined in the TypicalApplication Circuit, IF matching
components affect the IF frequency range
(Note 5)
LO
20003000
30003900
100500
50250
-30+3dBm
Small-Signal Conversion Gain
Gain Variation vs. FrequencyΔG
Conversion Gain Temperature
Coefficient
Single Sideband Noise FigureNF
Noise Figure Temperature
Coefficient
Noise Figure Under BlockingNF
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
f
= 2300MHz to 2900MHz, TC = +25°C
TC
TC
RF
(Note 7)
fRF = 2305MHz to 2360MHz0.1
fRF = 2500MHz to 2570MHz0.1
fRF = 2570MHz to 2620MHz0.1
C
fRF = 2500MHz to 2690MHz0.2
fRF = 2700MHz to 2900MHz0.3
TC = -40°C to +85°C-0.012dB/°C
CG
No blockers present9.812
SSB
f
= 2600M H z, f
R F
= + 5.0V , TC = + 25°C , no b l ocker s p r esent
V
C C
fRF = 2300M H z to 2900M H z, si ng l e si d eb and ,
NF
no b l ocker s p r esent, T
+8dBm blocker tone applied to RF port,
= 2600MHz, fLO = 2900MHz,
f
RF
B
f
BLOCKER
V
CC
= 2400MHz, PLO = 0dBm,
= +5.0V, TC = +25°C (Note 8)
= 300M H z, P
I F
= - 40°C to + 85°C
C
= 0d Bm ,
L O
7.98.79.2dB
9.810.5
0.018dB/°C
1822dB
MHz
MHz
dB
dB
MAX19996A
SiGe, High-Linearity, 2000MHz to 3900MHz
Downconversion Mixer with LO Buffer
are guaranteed by design and not production tested.) (Note 6)
Note 5: Not production tested. Operation outside this range is possible, but with degraded performance of some parameters. See
the
Typical Operating Characteristics
.
Note 6: All limits reflect losses of external components, including a 0.8dB loss at f
IF
= 300MHz due to the 4:1 impedance trans-
former. Output measurements were taken at IF outputs of the
Typical Application Circuit
.
Note 7: 100% production tested for functional performance.
Note 8: Measured with external LO source noise filtered so that 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 Application Note 2021:
Specifications and
Measurement of Local Oscillator Noise in Integrated Circuit Base Station Mixers
.
Note 9: Maximum reliable continuous input power applied to the RF port of this device is +12dBm from a 50Ω source.
3LO-3RF Spur Rejection3 x 3f
RF Input Return LossRL
LO Input Return LossRL
IF Output ImpedanceZ
IF Output Return LossRL
RF-to-IF IsolationfRF = 3100MHz to 3700MHz, PLO = +3dBm26.6dB
LO Leakage at RF PortfLO = 3400MHz to 4000MHz, PLO = +3dBm-38dBm
2LO Leakage at RF PortfLO = 3400MHz to 4000MHz, PLO = +3dBm-13.5dBm
LO Leakage at IF PortfLO = 3400MHz to 4000MHz, PLO = +3dBm-27dBm
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
= fLO - 100MHz
SPUR
LO on and IF terminated into a matched
RF
impedance
RF and IF terminated into a matched
LO
impedance
Nominal differential impedance at the IC’s
IF
IF outputs
RF terminated into 50Ω, LO
driven by 50Ω source, IF
transformed to 50Ω using
external components
shown in the Typical
IF
Application Circuit; see the
Typical Operating
Characteristics for
performance vs. inductor
values
PRF = -10dBm90
= -5dBm80
P
RF
22dB
16.3dB
200Ω
fIF = 450MHz,
L1 = L2 =
120nH
fIF = 350MHz,
L1 = L2 =
270nH
= 300MHz,
f
IF
L1 = L2 =
390nH
25
25
25
dBc
dB
MAX19996A
SiGe, High-Linearity, 2000MHz to 3900MHz
Downconversion Mixer with LO Buffer