MAX2441EAI+

19-1352; Rev 3; 8/03 KIT ATION EVALU LE B A IL A AV 900MHz Image-Reject Receivers Features The MAX2440/MAX2441/MAX2442 highly integrated front-end receiver ICs provide the lowest cost solution for cordless phones and ISM-band radios operating in the 900MHz band. All devices incorporate receive imagereject 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 signal 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. 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. Three 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. Evaluation kits are available for the MAX2420/ MAX2421/MAX2422. The MAX2420/MAX2421/MAX2422 are transceivers whose receive sections and pinout are identical to the MAX2440/MAX2441/MAX2442. ♦ Receive Mixer with 35dB Image Rejection For complete transceiver devices, refer to the MAX2420/ MAX2421/MAX2422/MAX2460/MAX2463 and MAX2424/ MAX2426 data sheets. ___________________Pin Configuration ________________________Applications Cordless Phones Spread-Spectrum Communications Wireless Telemetry Two-Way Paging ♦ Adjustable-Gain LNA ♦ Up to +2dBm Combined Receiver Input IP3 ♦ 4dB Combined Receiver Noise Figure ♦ Low Current Consumption: 23mA Receive 9.5mA Oscillator ♦ 0.5µA Shutdown Mode ♦ Operates from Single +2.7V to +4.8V Supply _______________Ordering Information PART TEMP RANGE PIN-PACKAGE MAX2440EAI -40°C to +85°C 28 SSOP MAX2441EAI MAX2442EAI -40°C to +85°C -40°C to +85°C 28 SSOP 28 SSOP Functional Diagram appears at end of data sheet. TOP VIEW VCC 1 28 GND CAP1 2 27 GND RXOUT 3 26 GND GND 4 RXIN 5 Wireless Networks VCC 6 GND 7 ______________________Selector Guide PART IF FREQ (MHz) INJECTION TYPE LO FREQ (MHz) MAX2440 10.7 High side fRF + 10.7 MAX2441 46 High side fRF + 46 MAX2442 70 High side fRF + 70 25 TANK MAX2440 MAX2441 MAX2442 24 TANK 23 VCC 22 VCC 21 PREOUT GND 8 20 PREGND GND 9 LNAGAIN 10 19 MOD VCC 11 18 DIV1 GND 12 17 VCOON GND 13 16 RXON GND 14 15 GND 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 MAX2440/MAX2441/MAX2442 General Description MAX2440/MAX2441/MAX2442 900MHz Image-Reject Receivers ABSOLUTE MAXIMUM RATINGS VCC to GND ...........................................................-0.3V to +5.5V Voltage on LNAGAIN, 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 MAX244_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 = unconnected, VVCOON = 2.4V, VRXON = VMOD = VDIV1 = 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 MIN TYP UNITS 4.8 V Oscillator Supply Current PREGND = unconnected 9.5 14 mA Prescaler Supply Current (divide-by-64/65 mode) (Note 2) 4.2 6 mA Prescaler Supply Current (buffer mode) VDIV1 = 2.4V (Note 3) 5.4 8.5 mA Receive Supply Current VRXON = 2.4V, PREGND = unconnected (Note 4) 23 36 mA Shutdown Supply Current VCOON = RXON = MOD = DIV1 = GND Digital Input Voltage High RXON, DIV1, VCOON, MOD Digital Input Voltage Low RXON, DIV1, VCOON, MOD Digital Input Current Voltage on any one digital input = VCC or GND Note 1: Note 2: Note 3: Note 4: 2 2.7 MAX TA = +25°C 0.5 TA = TMIN to TMAX 10 2.4 µA V ±1 0.45 V ±10 µA ≥25°C guaranteed by production test,