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PCM1770PW Datasheet(PDF) 8 Page - Texas Instruments |
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PCM1770PW Datasheet(HTML) 8 Page - Texas Instruments |
8 / 38 page www.ti.com TERMINAL FUNCTIONS (CONTINUED) PCM1770, PCM1771 SLES011E – SEPTEMBER 2001 – REVISED MARCH 2007 PCM1771PW TERMINAL I/O DESCRIPTION NAME NO. AGND 5 – Analog ground. This is a return for VCC. AIN 10 – Monaural analog signal mixer input. The signal can be mixed with the outputs of the L- and R-channel DACs. AMIX 14 I Analog mixing control BCK 3 I Serial bit clock. Clocks the individual bits of the audio data input, DATA. DATA 2 I Serial audio data input DEMP 13 I De-emphasis control FMT 15 I Data format select HGND 6 – Analog ground. This is a return for VHP. HOUTL 9 O L-channel analog signal output of the headphone amplifiers HOUTR 8 O R-channel analog signal output of the headphone amplifiers LRCK 1 I Left and right clock. Determines which channel is being input on the audio data input, DATA. The frequency of LRCK must be the same as the audio sampling rate. PD 4 I Reset input. When low, the PCM1771 device is powered down, and all mode control registers are reset to default settings. SCKI 16 I System clock input VCC 12 – Power supply for all analog circuits except the headphone amplifier. VCOM 7 – Decoupling capacitor connection. An external 10-µF capacitor connected from this terminal to analog ground is required for noise filtering. Voltage level of this terminal is 0.5 VHP nominal. VHP 11 – Analog power supply for the headphone amplifier circuits. The voltage level must be the same as VCC. PCM1771RGA TERMINAL I/O DESCRIPTION NAME NO. AGND 4 – Analog ground. This is a return for VCC. AIN 10 – Monaural analog signal mixer input. The signal can be mixed with the outputs of the L- and R-channel DACs. AMIX 14 I Analog mixing control BCK 2 I Serial bit clock. Clocks the individual bits of the audio data input, DATA. DATA 1 I Serial audio data input DEMP 13 I De-emphasis control FMT 15 I Data format select HGND 5 – Analog ground. This is a return for VHP. HOUTL 9 O L-channel analog signal output of the headphone amplifiers HOUTR 7 O R-channel analog signal output of the headphone amplifiers LRCK 20 I Left and right clock. Determines which channel is being input on the audio data input, DATA. The frequency of LRCK must be the same as the audio sampling rate. NC 8, 17, – No connect 18, 19 PD 3 I Reset input. When low, the PCM1771 device is powered down, and all mode control registers are reset to default settings. SCKI 16 I System clock input VCC 12 – Power supply for all analog circuits except the headphone amplifier VCOM 6 – Decoupling capacitor connection. An external 10-µF capacitor connected from this terminal to analog ground is required for noise filtering. Voltage level of this terminal is 0.5 VHP nominal. VHP 11 – Analog power supply for the headphone amplifier circuits. The voltage level must be the same as VCC. 8 Submit Documentation Feedback |
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