MAX2421EAI ,900MHz Image-Reject Transceiversapplications serving as the final power stage).PART TEMP. RANGE PIN-PACKAGEAll devices include an o ..
MAX2422EAI ,900MHz Image-Reject TransceiversFeaturesThe MAX2420/MAX2421/MAX2422/MAX2460/MAX2463' Receive/Transmit Mixers with 35dB Image Reject ..
MAX2424EAI ,900MHz Image-Reject Receivers with Transmit MixerELECTRICAL CHARACTERISTICS(V = +2.7V to +4.8V, no RF signals applied, LNAGAIN = Unconnected, V = V ..
MAX2426EAI ,900MHz Image-Reject Receivers with Transmit MixerApplicationsCAP1 2 27 GNDCordless Phones 26 GNDRXOUT 3GND 4 25TANKWireless TelemetryRXIN 245 TANKMA ..
MAX242CPN ,+5V-Powered, Multichannel RS-232 Drivers/ReceiversFeaturesMAX220 +5 2/2 4 4.7/10 No — 120 Ultra-low-power, industry-standard pinoutMAX222 +5 2/2 4 0. ..
MAX242CPN ,+5V-Powered, Multichannel RS-232 Drivers/ReceiversApplicationsPART TEMP. RANGE PIN-PACKAGEPortable ComputersMAX220CPE 0°C to +70°C 16 Plastic DIPLow- ..
MAX5839BCMH ,Octal, 13-Bit Voltage-Output DAC with Parallel Interfacefeatures double-buffered interface logic Double-Buffered Digital Inputswith a 13-bit parallel data ..
MAX5841LEUB ,Quad, 10-Bit, Low-Power, 2-Wire, Serial Voltage-Output DACApplicationso oMAX5841MEUB -40 C to +85 C 10 µMAX 1011 10XDigital Gain and Offset AdjustmentsProgra ..
MAX5841LEUB+ ,Quad, 10-Bit, Low-Power, 2-Wire, Serial Voltage-Output DACApplicationso oMAX5841MEUB -40 C to +85 C 10 µMAX 1011 10XDigital Gain and Offset AdjustmentsProgra ..
MAX5841LEUB+T ,Quad, 10-Bit, Low-Power, 2-Wire, Serial Voltage-Output DACELECTRICAL CHARACTERISTICS(V = +2.7V to +5.5V, GND = 0, V = V , R = 5kΩ, C = 200pF, T = T to T , un ..
MAX5841MEUB+T ,Quad, 10-Bit, Low-Power, 2-Wire, Serial Voltage-Output DACFeaturesThe MAX5841 is a quad, 10-bit voltage output, digital-♦ Ultra-Low Supply Current 2to-analog ..
MAX5842LEUB+ ,Quad, 12-Bit, Low-Power, 2-Wire, Serial Voltage-Output DACELECTRICAL CHARACTERISTICS(V = +2.7V to +5.5V, GND = 0, V = V , R = 5kΩ, C = 200pF, T = T to T , un ..
MAX2421EAI-MAX2422EAI-MAX2463EAI
900MHz Image-Reject Transceivers
General DescriptionThe MAX2420/MAX2421/MAX2422/MAX2460/MAX2463
are highly integrated front-end ICs that provide the lowest
cost solution for cordless phones and ISM-band radios
operating in the 900MHz band. All devices incorporate
transmit and receive image-reject mixers to reduce filter
cost. They operate with a +2.7V to +4.8V power supply,
allowing direct connection to a 3-cell battery stack.
The receive path incorporates an adjustable-gain LNA
and an image-reject downconverter with 35dB image
suppression. These features yield excellent combined
downconverter noise figure (4dB) and high linearity with
an input third-order intercept point (IP3) of up to +2dBm.
The transmitter consists of a variable-gain IF amplifier
with more than 35dB control range, an image-reject
upconverter with 35dB image rejection, and a power-
amplifier (PA) predriver that produces up to +2dBm (in
some applications serving as the final power stage).
All devices include an on-chip local oscillator (LO),
requiring only an external varactor-tuned LC tank for
operation. The integrated divide-by-64/65 dual-modulus
prescaler can also be set to a direct mode, in which it
acts as an LO buffer amplifier. Four separate power-
down inputs can be used for system power manage-
ment, including a 0.5µA shutdown mode. These parts
are compatible with commonly used modulation
schemes such as FSK, BPSK, and QPSK, as well as fre-
quency hopping and direct sequence spread-spectrum
systems. All devices come in a 28-pin SSOP package.
For applications using direct VCO or BPSK transmit mod-
ulation as well as receive image rejection, consult the
MAX2424/MAX2426 data sheet. For receive-only devices,
refer to the MAX2440/MAX2441/MAX2442 data sheet.
________________________ApplicationsCordless PhonesSpread-Spectrum Communications
Wireless TelemetryTwo-Way Paging
Wireless Networks
FeaturesReceive/Transmit Mixers with 35dB Image RejectionAdjustable-Gain LNAUp to +2dBm Combined Receiver Input IP34dB Combined Receiver Noise Figure>35dB of Transmit Power Control RangePA Predriver Provides up to +2dBmLow Current Consumption: 23mA Receive
26mA Transmit
9.5mA Oscillator0.5µA Shutdown ModeOperates from Single +2.7V to +4.8V Supply
MAX2420/MAX2421/MAX2422/MAX2460/MAX2463
___________________Pin Configuration19-1234; Rev 2; 2/99
_______________Ordering Information
Functional Diagram appears on last page.
______________________Selector Guide
MAX2420/MAX2421/MAX2422/MAX2460/MAX2463
900MHz Image-Reject Transceivers
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS(VCC= +2.7V to +4.8V, no RF signals applied, LNAGAIN = TXGAIN = open, VCOON = 2.4V, RXON = TXON = MOD = DIV1 = 0.45V,
PREGND = GND, TA= TMINto TMAX. Typical values are at TA= +25°C, VCC= +3.3V, unless otherwise noted.)
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.
Note 1:Calculated by measuring the combined oscillator and prescaler supply current and subtracting the oscillator supply current.
Note 2:Calculated by measuring the combined oscillator and LO buffer supply current and subtracting the oscillator supply current.
Note 3:Calculated by measuring the combined receive and oscillator supply current and subtracting the oscillator supply current.
With LNAGAIN = GND, the supply current drops by 4.5mA.
Note 4:Calculated by measuring the combined transmit and oscillator supply current and subtracting the oscillator supply current.
VCCto GND...........................................................-0.3V to +5.5V
TXIN Input Power (330Ωsystem)......................................-8dBm
Voltage on TXOUT......................................-0.3V to (VCC+ 1.0V)
Voltage on TXGAIN, LNAGAIN, TXON,
RXON, VCOON, DIV1, MOD....................-0.3V to (VCC+ 0.3V)
RXIN Input Power..............................................................10dBm
TANK, TANKInput Power...................................................2dBm
Continuous Power Dissipation (TA= +70°C)
SSOP (derate 9.50mW/°C above +70°C)......................762mW
Operating Temperature Range
MAX242_EAI/MAX246_EAI................................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +165°C
Lead Temperature (soldering, 10sec).............................+300°C
AC ELECTRICAL CHARACTERISTICS(MAX242X/246X EV kit, VCC= +3.3V; fLO= 925.7MHz (MAX2420), fLO= 961MHz (MAX2421), fLO= 985MHz (MAX2422),
fLO= 904.3MHz (MAX2460); fLO= 805MHz (MAX2463); fRXIN= 915MHz; PRXIN= -35dBm; PTXIN= -15dBm (330Ω); LNAGAIN = 2V;
TXGAIN = VCC; VCOON = 2.4V; RXON = TXON = MOD = DIV1 = PREGND = GND; TA= +25°C; unless otherwise noted.)
MAX2420/MAX2421/MAX2422/MAX2460/MAX2463
900MHz Image-Reject Transceivers
MAX2420/MAX2421/MAX2422/MAX2460/MAX2463
900MHz Image-Reject Transceivers
AC ELECTRICAL CHARACTERISTICS (continued)(MAX242X/246X EV kit, VCC= +3.3V; fLO= 925.7MHz (MAX2420), fLO= 961MHz (MAX2421), fLO= 985MHz (MAX2422),
fLO= 904.3MHz (MAX2460); fLO= 805MHz (MAX2463); fRXIN= 915MHz; PRXIN= -35dBm; PTXIN= -15dBm (330Ω); LNAGAIN = 2V;
TXGAIN = VCC; VCOON = 2.4V; RXON = TXON = MOD = DIV1 = PREGND = GND; TA= +25°C; unless otherwise noted.)
Note 5:Guaranteed by design and characterization.
Note 6:Image rejection typically falls to 30dBc at the frequency extremes.
Note 7:Refer to the Typical Operating Characteristicsfor plots showing receiver gain versus LNAGAIN voltage, input IP3 versus
LNAGAIN voltage, and noise figure versus LNAGAIN voltage.
Note 8:Two tones at PRXIN= -45dBm each, f1 = 915.0MHz and f2 = 915.2MHz.
Note 9:Time delay from RXON = 0.45V to RXON = 2.4V transition to the time the output envelope reaches 90% of its final value.
Note 10:Two tones at PTXIN= -21dBm each (330Ω), f1 = 10.6MHz, f2 = 10.8MHz (MAX2420/MAX2460), f1 = 45.9MHz,
f2 = 46.1MHz (MAX2421), f1 = 69.9MHz, f2 = 70.1MHz (MAX2422).
Note 11:Refer to the Typical Operating Characteristicsfor statistical data.
Note 12:Refer to the Typical Operating Characteristicsfor a plot showing transmitter gain versus TXGAIN voltage.
Note 13:Time delay from TXON = 0.45V to TXON = 2.4V transition to the time the output envelope reaches 90% of its final value.
Note 14:Refers to useable operating range. Tuning range of any given tank circuit design is typically much narrower (refer to Figure 2).
Note 15:Using tank components L3 = 5.0nH (Coilcraft A02T), C2 = C3 = C26 = 3.3pF, R6 = R7 = 10Ω.
Note 16:This approximates a typical application in which TXOUT is followed by an external PA and a T/R switch with finite isolation.
Note 17:Relative to the rising edge of PREOUT.
MAX2420/MAX2421/MAX2422/MAX2460/MAX2463
900MHz Image-Reject Transceivers
Typical Operating Characteristics(MAX242X/246X EV kit, VCC= +3.3V; fLO= 925.7MHz (MAX2420), fLO= 961MHz (MAX2421), fLO= 985MHz (MAX2422), fLO= 904.3MHz
(MAX2460); fLO= 805MHz (MAX2463); fRXIN= 915MHz; PRXIN= -35dBm; PTXIN= -15dBm (330Ω); LNAGAIN = 2V; TXGAIN = VCC;
VCOON = 2.4V; RXON = TXON = MOD = DIV1 = PREGND = GND; TA= +25°C; unless otherwise noted.)
MAX2420/MAX2421/MAX2422/MAX2460/MAX2463
900MHz Image-Reject Transceivers
Typical Operating Characteristics (continued)(MAX242X/246X EV kit, VCC= +3.3V; fLO= 925.7MHz (MAX2420), fLO= 961MHz (MAX2421), fLO= 985MHz (MAX2422), fLO= 904.3MHz
(MAX2460); fLO= 805MHz (MAX2463); fRXIN= 915MHz; PRXIN= -35dBm; PTXIN= -15dBm (330Ω); LNAGAIN = 2V; TXGAIN = VCC;
VCOON = 2.4V; RXON = TXON = MOD = DIV1 = PREGND = GND; TA= +25°C; unless otherwise noted.)
MAX2420/MAX2421/MAX2422/MAX2460/MAX2463
900MHz Image-Reject Transceivers
Typical Operating Characteristics (continued)(MAX242X/246X EV kit, VCC= + 3.3V; fLO= 925.7MHz (MAX2420), fLO= 961MHz (MAX2421), fLO= 985MHz (MAX2422), fLO= 904.3MHz
(MAX2460); fLO= 805MHz (MAX2463); fRXIN= 915MHz; PRXIN= -35dBm; PTXIN= -15dBm (330Ω); LNAGAIN = 2V; TXGAIN = VCC;
