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TDA1543T Folha de dados(PDF) 6 Page - NXP Semiconductors |
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TDA1543T Folha de dados(HTML) 6 Page - NXP Semiconductors |
6 / 13 page February 1991 6 Philips Semiconductors Product specification Dual 16-bit DAC (economy version) (I2S input format) TDA1543 FUNCTIONAL DESCRIPTION The TDA1543 accepts input serial data formats in two's complement with any bit length. Left and right data words are time multiplexed. The most significant bit (bit 1) must always be first. The format of data input is shown in Fig.5 and Fig.6. This flexible input data format (I2S) allows easy interfacing with signal processing chips such as interpolation filters, error correction circuits and audio signal processor circuits (ASP). The high maximum input bit-rate and fast settling current facilitates application in 4 × oversampling systems. An adjustable current is added to the output currents to bias output operational amplifiers (OP1; OP2) for maximum dynamic range (see Fig.1). With a LOW level on the word select (WS) input data is placed in the left input register and with a HIGH level on the WS input data is placed in the right input register. The data in the input registers is simultaneously latched in the output registers which control the bit switches. The output current of the DAC is a sink current. The current Iref at the Vref output is adjusted by a resistor or a current source. The current Iref is amplified with gain AIbias to the bias currents (IBL; IBR) which are added to the output currents. LIMITING VALUES In accordance with the Absolute Maximum System (lEC 134) THERMAL RESISTANCE * Equivalent to discharging a 100 pF capacitor through a 1.5 k Ω series resistor. SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT VDD supply voltage range 0 9 V TXTAL crystal temperature − +150 °C Tstg storage temperature range −55 +150 °C Tamb operating ambient temperature range −30 +85 °C Ves electrostatic handling* −2000 +2000 V SYMBOL PARAMETER TYP. UNIT Rth j-a from junction to ambient 100 K/W |
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