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TDA1386 Datasheet(PDF) 6 Page - NXP Semiconductors |
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TDA1386 Datasheet(HTML) 6 Page - NXP Semiconductors |
6 / 24 page 1998 Jan 06 6 Philips Semiconductors Product specification Noise shaping filter DAC TDA1386T FUNCTIONAL DESCRIPTION The TDA1386T CMOS DAC incorporates an up-sampling filter, a noise shaper, continuous calibrated current sources and operational amplifiers. System clock and data input format The TDA1386T accommodates slave mode only consequently, in all applications, the system devices must provide the 256fs system clock. The TDA1386T supports the following data input modes: • I2S-bus with data word length of up to 20 bits. • LSB fixed serial format with data word length of 16, 18 or 20 bits. As this format idles on the MSB it is necessary to know how many bits are being transmitted. The data input formats are illustrated in Fig.7. Left and right data-channel words are time multiplexed. Table 1 Data input format and system clock CKSL1 CKSL2 DATA INPUT FORMAT SYSTEM CLOCK NORMAL SPEED DOUBLE SPEED 00 I2S-bus 256fs 128fs 0 1 LSB fixed 16 bits 256fs 128fs 1 0 LSB fixed 18 bits 256fs 128fs 1 1 LSB fixed 20 bits 256fs 128fs Device operation When the APPL pin is held HIGH and APP3 is held LOW, pins APP0, APP1 and APP2 form a microcontroller interface. When the APPL pin is held LOW, pins APP0, APP1, APP2 and APP3 form pseudo-static application pins (TDA1305T pin compatible). PSEUDO-STATIC APPLICATION MODE (APPL = LOGIC 0) In this mode, the device operation is controlled by pseudo-static application pins (APP0: attenuation mode control; APP1: double-speed mode control; APP2: mute mode control and APP3: de-emphasis mode control). In the pseudo-static application mode the TDA1386T is pin compatible with the TDA1305T slave mode. The correspondence between TDA1386T pin number, TDA1386T pin name, TDA1305T pin name and a description of the effects is given in Table 2. Table 2 Pseudo-static application mode PIN NAME PIN NUMBER TDA1305T FUNCTION LOGIC VALUE DESCRIPTION APP0 17 ATSB 0 12 dB attenuation (from full scale) activated (only if MUSB = 1) 1 full scale (only if MUSB = 1) APP1 16 DSMB 0 double-speed mode 1 normal-speed mode APP2 15 MUSB 0 samples decrease to mute level 1 level in accordance with ATSB APP3 13 DEEM1 0 de-emphasis OFF (44.1 kHz) 1 de-emphasis ON (44.1 kHz) |
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