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MAX2720EUP
1.7GHz to 2.5GHz, Direct I/Q Modulator with VGA and PA Driver
General DescriptionThe MAX2720/MAX2721 are low-cost, high-performance,
direct I/Q modulators designed for use in wideband-
CDMA and wireless local-loop (WLL) systems. Their
direct-upconversion architecture reduces system cost,
component count, and board space compared to
devices with dual-conversion architectures.
The MAX2720/MAX2721 include an I/Q modulator, a
variable gain amplifier (VGA), and a power amplifier
(PA) driver. The quadrature modulator accepts differential
baseband I/Q signals and directly modulates an RF
carrier in the 1.7GHz to 2.1GHz range (MAX2720) or
the 2.1GHz to 2.5GHz range (MAX2721). The VGA pro-
vides 35dB of output power control. The modulator’s
amplitude and phase balance yield 35dBc of sideband
suppression and 30dBc of carrier suppression. These
devices feature an LO frequency doubler that allows
the external LO source to operate at half-frequency or
full-frequency when disabled.
The MAX2720/MAX2721 operate from a single +2.7V to
+3.3V supply and require only 77mA (MAX2720) or
86mA (MAX2721) of supply current. An additional
20mA of supply current is saved by disabling the
stand-alone PA driver. A low-power shutdown mode
further reduces supply current to less than 0.1µA. The
device is packaged in the small 20-pin TSSOP-EP with
exposed paddle to improve RF performance.
ApplicationsWireless Local Loop (WLL)
Wideband CDMA Systems
LMDS/MMDS
2.4GHz Broadband ISM Radios
DCS/PCS Base Stations
FeaturesRF Frequency Range
1.7GHz to 2.1GHz (MAX2720)
2.1GHz to 2.5GHz (MAX2721)Integrated I/Q Modulator, LO Doubler, VGA, and
PA Driver35dB VGA Gain Control Range35dBc Sideband Suppression30dBc Carrier SuppressionLow Supply Current
77mA (MAX2720), 86mA (MAX2721)
20mA Reduction with PA Driver Disabled0.1µA Supply Current in Shutdown Mode+2.7V to +3.3V Single-Supply Operation
MAX2720/MAX2721
1.7GHz to 2.5GHz, Direct I/Q Modulator with
VGA and PA Driver
Functional Diagram19-1606; Rev 0; 1/00
Pin Configuration appears at end of data sheet.
Ordering Information
MAX2720/MAX2721
1.7GHz to 2.5GHz, Direct I/Q Modulator with
VGA and PA Driver
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS(VCC= +2.7V to +3.3V; SHDN= VCC; ENX2= GND; VPC= 0.5V; no input AC signals applied to I+, I-, Q+, Q-, LO, DRIN. MODOUT
and DROUT = VCC, TA= -40°C to +85°C. Typical values are at VCC. = +3V, TA= +25°C, unless otherwise noted.)
AC ELECTRICAL CHARACTERISTICS(MAX2720/MAX2721 EV Kit, VCC= +3.0V, SHDN= VCC, ENX2= GND, VPC= 2.5V, input I/Q signals driven in quadrature, from a
1kΩsource impedance, single-ended, fI+= fQ+= 500kHz, VI+= VQ+= 200mVp-p, PLO= -13dBm, fLO= 950MHz (MAX2720), fLO=
1157.5MHz (MAX2721), PDRIN= -12dBm, fDRIN= 1900MHz (MAX2720), fDRIN= 2315MHz (MAX2721), MODOUT and DROUT ports
are matched to a 50Ωload, TA= +25°C, unless otherwise noted.) (Note 1)
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 +6V
ENX2, SHDN, PC, I+, I-, Q+, Q-, LO,
DRIN to GND........................................-0.3V to (VCC+ 0.3V)ENX2, SHDNContinuous Current.....................................±10mA
PC Continuous Current.....................................................±10mA
I+ to I-, Q+ to Q-....................................................................±2V
MODOUT, DROUT to GND Short-Circuit Duration.................10s
Continuous Power Dissipation (TA= +70°C)
20-Pin TSSOP-EP (derate 21.7mW/°C above +70°C)......1.74W
Operating Temperature Range...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range............................-65°C to +150°C
Lead Temperature (soldering 10s).................................+300°C
MAX2720/MAX2721
1.7GHz to 2.5GHz, Direct I/Q Modulator with
VGA and PA Driver
AC ELECTRICAL CHARACTERISTICS (continued)(MAX2720/MAX2721 EV Kit, VCC= +3.0V, SHDN= VCC, ENX2= GND, VPC= 2.5V, input I/Q signals driven in quadrature, from a
1kΩsource impedance, single-ended, fI+= fQ+= 500kHz, VI+= VQ+= 200mVp-p, PLO= -13dBm, fLO= 950MHz (MAX2720), fLO=
1157.5MHz (MAX2721), PDRIN= -12dBm, fDRIN= 1900MHz (MAX2720), fDRIN= 2315MHz (MAX2721), MODOUT and DROUT ports
are matched to a 50Ωload, TA= +25°C, unless otherwise noted.) (Note 1)
MAX2720/MAX2721
1.7GHz to 2.5GHz, Direct I/Q Modulator with
VGA and PA Driver
Note 1:Min/max limits are guaranteed by design and characterization and are not production tested.
Note 2:I/Q input bandwith is determined by the baseband source impedance and the I/Q input capacitance. The bandwith can be
increased by lowering the baseband source impedance.
Note 3:MODOUT output power specifications are met over this frequency range for VPC= 2.5V and TA= +25°C.
Note 4IP3 measured with two tones, f1= 500kHz and f2= 600kHz, at 100mVp-p each.
Note 5:Measured relative to desired upconverted signal level.
Note 6DROUT gain specifications are met over this frequency range at TA= +25°C.
Note 7:IP3 measured with two tones, f1= 1900MHz and f2= 1901MHz, at -18dBm each.
Note 8:IP3 measured with two tones, f1= 2315MHz and f2= 2316MHz, at -18dBm each.
AC ELECTRICAL CHARACTERISTICS (continued)(MAX2720/MAX2721 EV Kit, VCC= +3.0V, SHDN= VCC, ENX2= GND, VPC= 2.5V, input I/Q signals driven in quadrature, from a
1kΩsource impedance, single-ended, fI+= fQ+= 500kHz, VI+= VQ+= 200mVp-p, PLO= -13dBm, fLO= 950MHz (MAX2720), fLO=
1157.5MHz (MAX2721), PDRIN= -12dBm, fDRIN= 1900MHz (MAX2720), fDRIN= 2315MHz (MAX2721), MODOUT and DROUT ports
are matched to a 50Ωload, TA= +25°C, unless otherwise noted.) (Note 1)
MAX2720/MAX2721
1.7GHz to 2.5GHz, Direct I/Q Modulator with
VGA and PA Driver
Typical Operating Characteristics(MAX2720/MAX2721 EV Kit, VCC= +3.0V, SHDN= VCC, ENX2= GND, VPC= 2.5V, input I/Q signals driven in quadrature, from a
1kΩsource impedance, single-ended, fI+= fQ+= 500kHz, VI+= VQ+= 200mVp-p, PLO= -13dBm, fLO= 950MHz (MAX2720), fLO=
1157.5MHz (MAX2721), PDRIN= -12dBm, fDRIN= 1900MHz (MAX2720), fDRIN= 2315MHz (MAX2721), MODOUT and DROUT ports
are matched to a 50Ωload, TA= +25°C, unless otherwise noted.) (Note 1)
1.7GHz to 2.5GHz, Direct I/Q Modulator with
VGA and PA Driver
Typical Operating Characteristics (continued)(MAX2720/MAX2721 EV Kit, VCC= +3.0V, SHDN= VCC, ENX2= GND, VPC= 2.5V, input I/Q signals driven in quadrature, from a
1kΩsource impedance, single-ended, fI+= fQ+= 500kHz, VI+= VQ+= 200mVp-p, PLO= -13dBm, fLO= 950MHz (MAX2720), fLO=
1157.5MHz (MAX2721), PDRIN= -12dBm, fDRIN= 1900MHz (MAX2720), fDRIN= 2315MHz (MAX2721), MODOUT and DROUT ports
are matched to a 50Ωload, TA= +25°C, unless otherwise noted.) (Note 1)
MAX2720/21toc09
MAX2720/MAX2721
1.7GHz to 2.5GHz, Direct I/Q Modulator with
VGA and PA Driver
Typical Operating Characteristics (continued)(MAX2720/MAX2721 EV Kit, VCC= +3.0V, SHDN= VCC, ENX2= GND, VPC= 2.5V, input I/Q signals driven in quadrature, from a
1kΩsource impedance, single-ended, fI+= fQ+= 500kHz, VI+= VQ+= 200mVp-p, PLO= -13dBm, fLO= 950MHz (MAX2720), fLO=
1157.5MHz (MAX2721), PDRIN= -12dBm, fDRIN= 1900MHz (MAX2720), fDRIN= 2315MHz (MAX2721), MODOUT and DROUT ports
are matched to a 50Ωload, TA= +25°C, unless otherwise noted.) (Note 1)
MAX2720/MAX2721
1.7GHz to 2.5GHz, Direct I/Q Modulator with
VGA and PA Driver
Typical Operating Characteristics (continued)(MAX2720/MAX2721 EV Kit, VCC= +3.0V, SHDN= VCC, ENX2= GND, VPC= 2.5V, input I/Q signals driven in quadrature, from a
1kΩsource impedance, single-ended, fI+= fQ+= 500kHz, VI+= VQ+= 200mVp-p, PLO= -13dBm, fLO= 950MHz (MAX2720), fLO=
1157.5MHz (MAX2721), PDRIN= -12dBm, fDRIN= 1900MHz (MAX2720), fDRIN= 2315MHz (MAX2721), MODOUT and DROUT ports
are matched to a 50Ωload, TA= +25°C, unless otherwise noted.) (Note 1)
MAX2720/MAX2721
1.7GHz to 2.5GHz, Direct I/Q Modulator with
VGA and PA Driver
Typical Operating Characteristics (continued)(MAX2720/MAX2721 EV Kit, VCC= +3.0V, SHDN= VCC, ENX2= GND, VPC= 2.5V, input I/Q signals driven in quadrature, from a
1kΩsource impedance, single-ended, fI+= fQ+= 500kHz, VI+= VQ+= 200mVp-p, PLO= -13dBm, fLO= 950MHz (MAX2720), fLO=
1157.5MHz (MAX2721), PDRIN= -12dBm, fDRIN= 1900MHz (MAX2720), fDRIN= 2315MHz (MAX2721), MODOUT and DROUT ports
are matched to a 50Ωload, TA= +25°C, unless otherwise noted.) (Note 1)
MAX2720/MAX2721
1.7GHz to 2.5GHz, Direct I/Q Modulator with
VGA and PA Driver
Typical Operating Characteristics (continued)(MAX2720/MAX2721 EV Kit, VCC= +3.0V, SHDN= VCC, ENX2= GND, VPC= 2.5V, input I/Q signals driven in quadrature, from a
1kΩsource impedance, single-ended, fI+= fQ+= 500kHz, VI+= VQ+= 200mVp-p, PLO= -13dBm, fLO= 950MHz (MAX2720), fLO=
1157.5MHz (MAX2721), PDRIN= -12dBm, fDRIN= 1900MHz (MAX2720), fDRIN= 2315MHz (MAX2721), MODOUT and DROUT ports
are matched to a 50Ωload, TA= +25°C, unless otherwise noted.) (Note 1)
MAX2720/MAX2721
1.7GHz to 2.5GHz, Direct I/Q Modulator with
VGA and PA Driver
Typical Operating Characteristics (continued)(MAX2720/MAX2721 EV Kit, VCC= +3.0V, SHDN= VCC, ENX2= GND, VPC= 2.5V, input I/Q signals driven in quadrature, from a
1kΩsource impedance, single-ended, fI+= fQ+= 500kHz, VI+= VQ+= 200mVp-p, PLO= -13dBm, fLO= 950MHz (MAX2720), fLO=
1157.5MHz (MAX2721), PDRIN= -12dBm, fDRIN= 1900MHz (MAX2720), fDRIN= 2315MHz (MAX2721), MODOUT and DROUT ports
are matched to a 50Ωload, TA= +25°C, unless otherwise noted.) (Note 1)
MAX2721
MAX2720/MAX2721
1.7GHz to 2.5GHz, Direct I/Q Modulator with
VGA and PA Driver
Typical Operating Characteristics (continued)(MAX2720/MAX2721 EV Kit, VCC= +3.0V, SHDN= VCC, ENX2= GND, VPC= 2.5V, input I/Q signals driven in quadrature, from a
1kΩsource impedance, single-ended, fI+= fQ+= 500kHz, VI+= VQ+= 200mVp-p, PLO= -13dBm, fLO= 950MHz (MAX2720), fLO=
1157.5MHz (MAX2721), PDRIN= -12dBm, fDRIN= 1900MHz (MAX2720), fDRIN= 2315MHz (MAX2721), MODOUT and DROUT ports
are matched to a 50Ωload, TA= +25°C, unless otherwise noted.) (Note 1)
