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MC13109 Datasheet(PDF) 11 Page - Motorola, Inc |
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MC13109 Datasheet(HTML) 11 Page - Motorola, Inc |
11 / 28 page MC13109 11 MOTOROLA ANALOG IC DEVICE DATA ELECTRICAL CHARACTERISTICS (continued) Low Battery Detect An external resistor divider is connected to the “Ref” input pin to set the threshold for the low battery detect. The voltage at the “Ref” input pin is compared to an internal 1.23 V Bandgap reference voltage. The “BD Out” pin is open collector and requires and external pull–up resistor to VCC. (Test Conditions: VCC = 2.6 V, TA = 25°C.) Characteristic Condition Input Pin Measure Pin Symbol Min Typ Max Unit Average Threshold Voltage Take average of rising and falling threshold Ref Ref/ BD Out Threshold – 1.23 – V Hysteresis – Ref Ref/ BD Out Hys – 4.0 – mV Input Current Vin = 1.6 V – Ref Iin –50 5.71 +50 nA Output High Voltage Vref = 1.6, RL = 3.9 kΩ Ref BD Out VOH VCC – 0.1 2.6 – V Output Low Voltage Vref = 0.9, RL = 3.9 kΩ Ref BD Out VOL – 0.12 0.4 V Figure 3. Data Amp Operation Data Signal Data Amp Data Amp Output Hysteresis 0 Figure 4. Typical Expander Response Rx AUDIO IN (dBV) –30 –40 –50 –60 – 40 – 30 – 20 –10 0 –20 –10 E Out = –5.0 dBV Typical at THD = 5 % 10 10 |
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