MAX2460EAI+

19-1234; Rev 5; 8/03 KIT ATION EVALU E L B A AVAIL 900MHz Image-Reject Transceivers Features ♦ Receive/Transmit Mixers with 35dB Image Rejection ________________________Applications Cordless Phones Spread-Spectrum Communications Wireless Telemetry ♦ Adjustable-Gain LNA ♦ Up to +2dBm Combined Receiver Input IP3 ♦ 4dB Combined Receiver Noise Figure ♦ >35dB of Transmit Power Control Range ♦ PA Predriver Provides up to +2dBm ♦ Low Current Consumption: 23mA Receive 26mA Transmit 9.5mA Oscillator ♦ 0.5µA Shutdown Mode ♦ Operates from Single +2.7V to +4.8V Supply _______________Ordering Information PART TEMP RANGE PIN-PACKAGE MAX2420EAI -40°C to +85°C 28 SSOP MAX2421EAI MAX2422EAI MAX2460EAI MAX2463EAI -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C 28 SSOP 28 SSOP 28 SSOP 28 SSOP Functional Diagram appears on last page. ___________________Pin Configuration TOP VIEW VCC 1 28 GND CAP1 2 27 GND RXOUT 3 26 GND TXGAIN 4 25 TANK RXIN 5 Two-Way Paging VCC 6 Wireless Networks GND 7 ______________________Selector Guide GND 8 MAX2420 MAX2421 MAX2422 MAX2460 MAX2463 24 TANK 23 VCC 22 VCC 21 PREOUT 20 PREGND TXOUT 9 PART IF FREQ (MHz) INJECTION TYPE LO FREQ (MHz) LNAGAIN 10 19 MOD MAX2420 10.7 High side fRF + 10.7 VCC 11 18 DIV1 TXIN 12 17 VCOON MAX2421 46 High side fRF + 46 MAX2422 70 High side fRF + 70 N.C. 13 16 RXON CAP2 14 15 TXON MAX2460 10.7 Low side fRF - 10.7 MAX2463 110 Low side fRF - 110 SSOP ________________________________________________________________ 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 MAX2420/MAX2421/MAX2422/MAX2460/MAX2463 General Description The 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 three-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 poweramplifier (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 powerdown inputs can be used for system power management, including a 0.5µA shutdown mode. These parts are compatible with commonly used modulation schemes such as FSK, BPSK, and QPSK, as well as frequency hopping and direct sequence spread-spectrum systems. All devices come in a 28-pin SSOP package. For applications using direct VCO or BPSK transmit modulation, as well as receive image rejection, consult the MAX2424/MAX2426 data sheet. For receive-only devices, refer to the MAX2440/MAX2441/MAX2442 data sheet. MAX2420/MAX2421/MAX2422/MAX2460/MAX2463 900MHz Image-Reject Transceivers ABSOLUTE MAXIMUM RATINGS VCC to GND ...........................................................-0.3V to +5.5V TXIN Input Power (330Ω system) ......................................-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, TANK Input 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, 10s) .................................+300°C 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. CAUTION! ESD SENSITIVE DEVICE 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 = TMIN to TMAX. Typical values are at TA = +25°C, VCC = +3.3V, unless otherwise noted.) (Note 1) CONDITIONS PARAMETER Supply-Voltage Range Oscillator Supply Current MIN TYP 2.7 PREGND = floating Prescaler Supply Current (divide-by-64/65 mode) (Note 2) MAX UNITS 4.8 V 9.5 14 mA 4.2 6 mA Prescaler Supply Current (buffer mode) (Note 3) DIV1 = 2.4V 5.4 8.5 mA Receive Supply Current (Note 4) RXON = 2.4V, PREGND = floating 23 36 mA Transmitter Supply Current (Note 5) RXON = 0.45V, TXON = 2.4V, PREGND = floating 26 42 mA TA = +25°C Shutdown Supply Current VCOON = RXON = TXON = MOD = DIV1 = GND Digital Input Voltage High RXON, TXON, DIV1, VCOON, MOD Digital Input Voltage Low RXON, TXON, DIV1, VCOON, MOD Digital Input Current Voltage on any one digital input = VCC or GND 0.5 TA = TMIN to TMAX 10 2.4 µA µA V ±1 0.45 V ±10 µA ≥25°C guaranteed by production test,