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TS3004ITD1033 Datasheet(PDF) 6 Page - Silicon Laboratories |
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TS3004ITD1033 Datasheet(HTML) 6 Page - Silicon Laboratories |
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6 / 12 page  TS3004 Page 6 TS3004 Rev. 1.0 PIN FUNCTIONS PIN NAME FUNCTION 1 FOUT Fixed Frequency Output. A push-pull output stage with an output resistance of 160 Ω. FOUT pin swings from GND to VDD. For lowest power operation, capacitance loads should be minimized and resistive loads should be maximized. 2,3,4 FDIV2:0 Frequency Divider Input. Various combinations of these inputs will change the FOUT frequency for a fixed value of RSET. Refer to Table 1. 5 PWMOUT Pulse-width Modulated Output. A push-pull output stage with an output resistance of 160 Ω, the PWMOUT pin is wired anti-phase with respect to FOUT and swings from GND to VDD. For lowest power operation, capacitance loads should be minimized and resistive loads should be maximized. 6 PWM_CNTRL PWM Output Pulse Control Pin. Applying a voltage between GND and VRSET will reduce the duty cycle of the PWMOUT output that is set by the capacitor connected to the CPWM pin. Connect PWM_CNTRL to VDD for fixed PWMOUT output pulse time (determined only by capacitor at CPWM). 7 GND Ground. Connect this pin to the system’s analog ground plane. 8 CPWM PWMOUT Pulse Width Programming Capacitance Input. A target capacitance connected from this pin to GND sets the duty cycle of the PMW output. Minimize any stray capacitance on this pin. The voltage on this pin will swing from GND to VRSET. Connect CPWM to VDD to disable PWM function (saves PWM current). 9 VDD Power Supply Voltage Input. The supply voltage range is 1.55V ≤ VDD ≤ 5.25V. Bypass this pin with a 0.1uF ceramic coupling capacitor in close proximity to the TS3004. 10 RSET FOUT Programming Resistor Input. A 4.32MOhm resistor connected from this pin to ground sets the T3004’s internal oscillator’s output period to 40µs (25KHz). For optimal performance, the composition of the RSET resistor shall be consistent with a tolerance of 1% or lower. The RSET pin voltage is approximately 0.3V. |
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