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MC13109AFB Scheda tecnica(PDF) 10 Page - Motorola, Inc |
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MC13109AFB Scheda tecnica(HTML) 10 Page - Motorola, Inc |
10 / 28 page MC13109A 10 MOTOROLA RF/IF DEVICE DATA ELECTRICAL CHARACTERISTICS (continued) Splatter Amplifier The Splatter Amplifier is an inverting rail–to–rail output operational amplifier with the non–inverting input terminal connected to the internal VB half supply reference. External resistors and capacitors can be connected to set the gain and frequency response. The “Spl Amp In” input is ac coupled. (Test Conditions: VCC = 2.6 V, TA = 25°C, fin = 1.0 kHz, External resistors Set for Gain of 1.) Characteristic Condition Input Pin Measure Pin Symbol Min Typ Max Unit Open Loop Gain – Spl Amp In Tx Out AVOL – 60 – dB Gain Bandwidth – Spl Amp In Tx Out GBW – 100 – kHz Maximum Output Swing RL = 10 kΩ Spl Amp In Tx Out VOmax – VCC – 0.3 – Vpp Tx Audio Path Recommendation The recommended configuration for the Tx Audio path includes setting the Microphone Amplifier gain to 16 dB using the external gain setting resistors and setting the Splatter Amplifier gain to 9.0 dB using the external gain setting resistors. PLL Voltage Regulator The PLL supply voltage is regulated to a nominal of 2.2 V. The “VCC Audio” pin is the supply voltage for the internal voltage regulator. The “PLL Vref ” pin is the 2.2 V regulated output voltage. Two capacitors with 10 µF and 0.01 µF values must be connected to the “PLL Vref ” pin to filter and stabilize this regulated voltage. The voltage regulator provides power for the 2nd LO, Rx and Tx PLL’s, and MPU Interface. The voltage regulator can also be used to provide a regulated supply voltage for external IC’s. Rx and Tx PLL loop performance are independent of the power supply voltage when the voltage regulator is used. The voltage regulator requires about 200 mV of “headroom”. When the power supply decreases to within about 200 mV of the output voltage, the regulator will go out of regulation but the output voltage will not turn off. Instead, the output voltage will maintain about a 200 mV delta to the power supply voltage as the power supply voltage continues to decrease. The “PLL Vref” pin can be connected to “VCC Audio” by the external wiring if voltage higher than 2.2 V is required. But it should not be connected to other supply except “VCC Audio”. The voltage regulator is “on” in the Active and Rx modes. In the Standby and Inactive modes, the voltage regulator is turned off to reduce current drain and the “PLL Vref” pin is internally connected to “VCC Audio” (i.e., the supply voltage is maintained but is now unregulated). (Test Conditions: VCC = 2.6 V, TA = 25°C.) Characteristic Condition Input Pin Measure Pin Symbol Min Typ Max Unit Output Voltge Level VCC = 2.6 V, OL= 0 mA – VCC PLL Vout – 2.2 – V Line Regulation IL = 0 mA, VCC = 2.6 to 5.5 V VCC VCC PLL Regline – 3.66 40 mV Load Regulation VCC = 2.6 V, IL = 0 to 1.0 mA VCC VCC PLL Regload –40 –2.28 – mV |
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