ml2712 Micro Electronics Corporation, ml2712 Datasheet
ml2712
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ml2712 Summary of contents
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... GENERAL DESCRIPTION The ML2712 combined with the ML2713 form a FSK (Frequency Shift Keying) 2.4 GHz radio chipset. The ML2712 contains the RF and PLL circuits for a half duplex radio transceiver solution for IEEE802.11 and other wireless communication protocols using the 2.4 GHz ISM band. ...
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... Japan: 2,598,946; 2,619,299; 2,704,176; 2,821,714. Other patents are pending. 2 PRELIMINARY DATASHEET PRELIMINARY January, 2000 ML2712 ...
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... COUNTER FREQUENCY DETECTOR PRESCALER 1LO CHARGE PUMP 40/41 1LO VCO GND GND GND GND January, 2000 PRELIMINARY DATASHEET ML2712 VCC 8 VCC 5 VCC CONTROL + – 8 BIT SERIAL DAC PRESCALER CONTROL 2LO 4-BIT SWALLOW COUNTER ADDRESS DECODE 1LO 6-BIT SWALLOW ...
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... VCC to PCB ground is recommended 6 Ground for 2LO Charge Pump Power Supply for 2LO Prescaler and Phase Detector. A bypass capacitor connected with minimum trace lengths from VCC recommended January, 2000 ML2712 GND WBCP VCC 5 VCC 8 TRFI GND RRFI ...
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... In TRANSMIT Mode, functions with 1IFB to present a balanced first IF input port with 340 input impedance. Connection must be AC coupled recommended that the signal trace connected to this pin be isolated from other signal or digital control lines to maintain receiver sensitivity January, 2000 PRELIMINARY DATASHEET ML2712 to PCB 8 to PCB ground PCB 2 ...
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... Bandgap voltage output. Connection available for bypass capacitor recommended for noise decoupling from Bandgap voltage reference. Recommended capacitance value is 10nF connected to ground Local Oscillator Enable Transmit Switch Receive Switch Enable serial data D/A Converter Enable Serial Data Clock input for serial data January, 2000 ML2712 output impedance. Connection must ...
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... The ML2712 receiver circuits perform the RF down conversion. A typical receiver design would include the ML2712, an external LNA and RF filter filter and the ML2713 IF Transceiver. In RECEIVE mode, the ML2712 uses the 1LO signal to down convert the received 2 ...
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... VCO, and is a technique for generating low noise, phase/frequency modulated transmitters without the need for bandpass filtering. The ML2712 transmitter architecture is shown Figure 3. A tuning voltage applied to the transmit VCO, operating at the final transmission frequency, ensures the correct center frequency before modulation is applied. This closed ...
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... VCO is 500MHz to ensure that the down-converted signal passes through the low pass filter. Design of the ML2712 enables the large pull-in frequency in the Wideband PLL. When TS (Pin 47)is asserted the Wideband charge pump output is first clamped to mid- rail ...
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... Serial Control Bus (DATA, CLK, and ENABLE). Program words are clocked into divider or control circuits when ENABLE is asserted. The programming is operational whether the ML2712 is in SLEEP, STANDBY, RECEIVE or TRANSMIT Mode. The reference signal, REF (Pin 10) typically from an external crystal oscillator, is fed to a programmable reference divider with programmable division ratios of 40, 32, 20 and 16 ...
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... MODES OF OPERATION (CONTINUED) OVERVIEW OF PLLS Control words programmed via the Serial Control Bus set the ML2712 PLL reference frequency divider,and the 2LO PLL and 1LO PLL signal dividers division ratios. For illustration a simple PLL is shown in Figure 7. TUNING VOLTAGE VCO CONTROL DIVIDE ...
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... Table 1. Operating Mode ControlStates January, 2000 ML2712 ...
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... Modes. The serial control interface overrides the parallel mode control interface. See Table 2 and Figure 9. All DATA bits are clocked into the ML2712 while EN or DACEN is low and loaded into the addressed latch on the low to high trailing edge of the EN or DACEN pulse ...
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... oscillators to down convert the 2450 MHz ISM Band RF signal. (Table 5). All these circuit components are enabled individually using CONTROL WORD A as defined in Table 4. For the PLLs to operate, all control bits must be set to 1. January, 2000 ML2712 ...
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... Control Word B changes the control mode in which ML2712 operates. CONTROL WORD B may also be 0 used to program charge pump current level and enable the DAC, Comparator & calibration circuits. ...
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... Control Bit CAL The ML2713 companion to the ML2712 contains self- aligning filter and discriminator circuits. The alignment of these circuits is designed to take place when the ML2712/ ML2713 chipset is in STANDBY Mode ( Table 1). Under power up default conditions in STANDBY Mode the ML2712 provides an 8 MHz calibration tone to the ML2713 via the 2LO output (pins 2LO & ...
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... CONTROL WORD D The 1LO PLL is a dual modulus type as described above. 1LO ND & NS counters are denoted in ML2712 as ND1 & NS1. Modulus values are binary weighted and are loaded using CONTROL WORD D as shown in Table 4. The prescaler used in the 1LO PLL is a 40/41 dual modulus type giving the 1LO ...
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... Within 20KHz of Final Frequency Time from RS Asserted to Receive RF Down Converter Enabled Time from TS Asserted to Transmit RF Down Converter and Wideband PLL Enabled From RS de-asserted, TS asserted and Wideband PLL & Transmit Down Converter Ready January, 2000 ML2712 ) (Note 2) ...................... 100°C VCC , VCC , VCC , RVCC = 3.3V ...
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... PLL Dividers Programmed, Maximum Charge Pump Current Single Ended, Square Wave, Peak Switching among Transmit, Receive and Standby. 1MHz 2MHz 3MHz >3MHz January, 2000 PRELIMINARY DATASHEET ML2712 MIN TYP MAX UNITS 1 µs –1 –9.5 dBm 0 dBm ...
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... Final Frequency Monotonic under all Conditions Sensed by RSTH Comparator, DAC Code 0 to Code 255 Load = 1M , DAC Code 0 to Code 255 To within ½ LSB Input to Output High and Input to Output Low January, 2000 ML2712 MIN TYP MAX UNITS MHz 500 ...
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... Error is measured relative to the reference signal at the center of the data symbol. PRELIMINARY CONDITIONS Modulation on Reference External Transmit VCO Locked to the ILO 1MHz 2MHz 3MHz >3MHz 1MSymbol/s 2GFSK or 4GFSK to Ideal GFSK January, 2000 PRELIMINARY DATASHEET ML2712 MIN TYP MAX UNITS 240 260 280 MHz –126 dBc/Hz –50 dBc –66 dBc – ...
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... Micro Linear Corporation 2092 Concourse Drive San Jose, CA 95131 Tel: (408) 433-5200 Fax: (408) 432-0295 www.microlinear.com January, 2000 ML2712 0º - 8º 0.003 - 0.008 (0.09 - 0.20) 0.018 - 0.030 (0.45 - 0.75) SEATING PLANE PACKAGE 48 Pin TQFP 7mm body 48 Pin TQFP 7mm body ...