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- ..
MAX242CPN+ ,+5V-Powered, Multichannel RS-232 Drivers/ReceiversElectrical Characteristics—MAX220/222/232A/233A/242/243(V = +5V ±10%, C1–C4 = 0.1µF‚ MAX220, C1 = 0 ..
MAX242CWN ,+5V-Powered, Multichannel RS-232 Drivers/ReceiversMAX220–MAX24919-4323; Rev 9; 4/00+5V-Powered, Multichannel RS-232Drivers/Receivers
MAX242CWN+ ,+5V-Powered, Multichannel RS-232 Drivers/Receivers+5V-Powered, MultichannelMAX220–MAX249RS-232 Drivers/Receivers
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 ..
MAX5842MEUB ,Quad, 12-Bit, Low-Power, 2-Wire, Serial Voltage-Output DACApplicationso oMAX5842LEUB -40 C to +85 C 10 µMAX 0111 10Xo oDigital Gain and Offset AdjustmentsMAX ..
MAX2424EAI-MAX2426EAI
900MHz Image-Reject Receivers with Transmit Mixer
________________General DescriptionThe MAX2424/MAX2426 highly integrated front-end ICs
provide the lowest cost solution for cordless and ISM-
band radios operating in the 900MHz band. Both devices
incorporate a receive image-reject mixer (to reduce filter
cost) as well as a versatile transmit mixer. The devices
operate from a +2.7V to +4.8V single 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 (IIP3) of up to +2dBm.
The transmitter consists of a double-balanced mixer and
a power amplifier (PA) predriver that produces up to
0dBm (in some applications serving as the final power
stage). It can be used in a variety of configurations,
including BPSK modulation, direct VCO modulation, and
transmitter upconversion. For devices featuring trans-
mit as well as receive image rejection, refer to the
MAX2420/MAX2421/MAX2422/MAX2460/MAX2463
data sheet.
The MAX2424/MAX2426 have an on-chip local oscillator
(LO), requiring only an external varactor-tuned LC tank
for operation. The integrated divide-by-64/65 dual-mod-
ulus 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.
The MAX2424/MAX2426 come in a 28-pin SSOP pack-
age.
________________________ApplicationsCordless Phones
Wireless Telemetry
Wireless Networks
Spread-Spectrum Communications
Two-Way Paging
____________________________FeaturesReceive Mixer with 35dB Image RejectionAdjustable-Gain LNAUp to +2dBm Combined Receiver Input IP34dB Combined Receiver Noise FigureOptimized for Common Receiver IF Frequencies:
10.7MHz (MAX2424)
70MHz (MAX2426)PA Predriver Provides up to 0dBmLow Current Consumption: 23mA Receive
20mA Transmit
9.5mA Oscillator0.5μA Shutdown ModeOperates from Single +2.7V to +4.8V Supply
MAX2424/MAX2426
900MHz Image-Reject Receivers
with Transmit Mixer
___________________Pin Configuration
Functional Diagram appears at end of data sheet.
MAX2424/MAX2426
900MHz Image-Reject Receiver
with Transmit Mixer
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS(VCC= +2.7V to +4.8V, no RF signals applied, LNAGAIN= Unconnected, VTXIN= VTXIN= 2.3V, VVCOON= 2.4V, VRXON= VTXON=
VMOD= VDIV1= 0.45V, PREGND = GND, TA= -40°C to +85°C. Typicals 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, TXINDifferential Voltage..............................................+2V
Voltage on TXOUT......................................-0.3V to (VCC+ 1.0V)
Voltage on LNAGAIN, TXON, RXON, VCOON,
DIV1, MOD, TXIN, TXIN............................-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...........................-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(MAX2424/MAX2426 EV kit, VCC= +3.3V, fRXIN= 915MHz, PRXIN= -35dBm, VTXIN= VTXIN= 2.3V (DC bias), VTXIN= 250mVp-p,
fTXIN= 1MHz, VLNAGAIN= 2V, VVCOON= 2.4V, RXON = TXON = MOD = DIV1 = PREGND = GND, TA= +25°C, unless otherwise noted.)
MAX2424/MAX2426
900MHz Image-Reject Receiver
with Transmit Mixer
MAX2424/MAX2426
900MHz Image-Reject Receiver
with Transmit Mixer
AC ELECTRICAL CHARACTERISTICS (continued)(MAX2424/MAX2426 EV kit, VCC= +3.3V, fRXIN= 915MHz, PRXIN= -35dBm, VTXIN= VTXIN= 2.3V (DC bias), VTXIN= 250mVp-p,
fTXIN= 1MHz, VLNAGAIN= 2V, VVCOON= 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 a plot showing Receiver Gain vs. LNAGAIN Voltage, Input IP3 vs.
LNAGAIN Voltage, and Noise Figure vs. LNAGAIN Voltage.
Note 8:Two tones at PRXIN= -45dBm each, f1 = 915.0MHz and f2 = 915.2MHz.
Note 9:Time delay from VRXON= 0.45V to VRXON= 2.4V transition to the time the output envelope reaches 90% of its final value.
Note 10:Output power typically falls to -10dBm at the frequency extremes.
Note 11:Two tones at VTXIN= 125mVp-p, f1 = 1.0MHz, and f2 = 1.2MHz.
Note 12:Time delay from VTXON= 0.45V to VTXON= 2.4V transition to the time the output envelope reaches 90% of its final value.
Note 13:Using tank components L3 = 5.0nH (Coilcraft A02T), C2 = C3 = C26 = 3.3pF, R6 = R7 = 10Ω.
Note 14:This approximates a typical application in which TXOUT is followed by an external PA and a T/R switch with finite isolation.
Note 15:Relative to the rising edge of PREOUT.
MAX2424/MAX2426
900MHz Image-Reject Receiver
with Transmit MixerRECEIVER SUPPLY CURRENT
vs. TEMPERATURE
MAX2424/6-01
TEMPERATURE (°C)
ICC
(mA)
TRANSMITTER SUPPLY CURRENT
vs. TEMPERATURE
MAX2424/6-02
TEMPERATURE (°C)
ICC
(mA)0
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE
MAX2424/6-03
TEMPERATURE (°C)
ICC
RECEIVER GAIN vs. LNAGAIN
MAX2424/6-04
LNAGAIN VOLTAGE (V)
RECEIVER GAIN (dB)
MAX2424
RECEIVER GAIN vs. TEMPERATURE
MAX2424/6-07
TEMPERATURE (°C)
RECEIVER GAIN (dB)
RECEIVER INPUT IP3 vs. LNAGAIN
MAX2424/6-05
LNAGAIN VOLTAGE (V)
IIP3 (dBm)00.51.01.52.0
RECEIVER NOISE FIGURE
vs. LNAGAINMAX2424/6-06
LNAGAIN VOLTAGE (V)
NOISE FIGURE (dB)
RECEIVER NOISE FIGURE vs.
TEMPERATURE AND SUPPLY VOLTAGE
MAX2424/6-08
TEMPERATURE (°C)
NOISE FIGURE (dB)
RECEIVER INPUT IP3
vs. TEMPERATURE
MAX2424/6-09
TEMPERATURE (°C)
IIP3 (dBm)
__________________________________________Typical Operating Characteristics(MAX2424/MAX2426 EV kit, VCC= +3.3V; fLO(RX)= 925.7MHz (MAX2424), 985MHz (MAX2426); fRXIN= 915MHz, PRXIN=
-35dBm, fLO(TX)= 915MHz, VTXIN= VTXIN= 2.3V (DC bias), VTXIN= 250mVp-p, fTXIN= 1MHz, VLNAGAIN= 2V, VVCOON= 2.4V,
RXON = TXON = MOD = DIV1 = PREGND = GND, TA= +25°C, unless otherwise noted.)
MAX2424/MAX2426
900MHz Image-Reject Receiver
with Transmit Mixer
______________________________Typical Operating Characteristics (continued)(MAX2424/MAX2426 EV kit, VCC= +3.3V; fLO(RX)= 925.7MHz (MAX2424), 985MHz (MAX2426); fRXIN= 915MHz, PRXIN=
-35dBm, fLO(TX)= 915MHz, VTXIN= VTXIN= 2.3V (DC bias), VTXIN= 250mVp-p, fTXIN= 1MHz, VLNAGAIN= 2V, VVCOON= 2.4V,
RXON = TXON = MOD = DIV1 = PREGND = GND, TA= +25°C, unless otherwise noted.)
MAX2424/MAX2426
900MHz Image-Reject Receiver
with Transmit MixerTRANSMITTER BASEBAND
FREQUENCY RESPONSE
MAX2424/6-20
FREQUENCY (MHz)
TXOUT (dBc)
POWER vs. TXIN VOLTAGE
MAX2424/6-19
TXIN VOLTAGE (mVp-p)
POWER (dBm)
______________________________Typical Operating Characteristics (continued)(MAX2424/MAX2426 EV kit, VCC= +3.3V; fLO(RX)= 925.7MHz (MAX2424), 985MHz (MAX2426); fRXIN= 915MHz, PRXIN=
-35dBm, fLO(TX)= 915MHz, VTXIN= VTXIN= 2.3V (DC bias), VTXIN= 250mVp-p, fTXIN= 1MHz, VLNAGAIN= 2V, VVCOON= 2.4V,
RXON = TXON = MOD = DIV1 = PREGND = GND, TA= +25°C, unless otherwise noted.)
______________________________________________________________Pin Description
