PCM1738E

Product Summary

The PCM1738E is a CMOS, monolithic, Integrated Cir-cuit (IC) that includes stereo Digital-to-Analog Convert-ers (DACs) and support circuitry in a small SSOP-28package. The data converter PCM1738E utilizes a newly developedadvanced segment DAC architecture to achieve excel-lent dynamic performance and improved tolerance toclock jitter. The PCM1738E provides balanced currentoutputs, allowing the user to optimize analog perfor-mance externally, and accepts industry standard audiodata formats with 16- to 24-bit data, providing easyinterfacing to audio DSP and decoder chips. Samplingrates up to 200kHz are supported. The PCM1738E alsohas two optional modes of operation: an external digital-filter mode (for use with the DF1704, DF1706, andPMD200), and a DSDdecoder interface for SACDplayback applications. A full set of user-programmablefunctions are accessible through a 4-wire serial controlport that supports register write and read functions.

Parametrics

PCM1738E absolute maximum ratings: (1)Power supply voltage: VCC1, VCC2, and VCC3: 6.5 V; VDD: 4 V; (2)Supply voltage differences among VCC1, VCC2, and VCC3: ±0.1 V; (3)Supply voltage differences, VCCX, VDD: VCCX – VDD < 3 V; (4)Ground voltage differences among AGND1, AGND2, and DGND: ±0.1 V; (5)Digital input voltage, LRCK, DATA, BCK, SCKI, MDI, MC, CS, MUTE, and RST: –0.3 to 6.5 V; (6)Digital input voltage, ZEROL, ZEROR, SCKO, and MDO: –0.3 to (VDD + 0.3) < 4 V; (7)Analog input voltage, IOUTR–, IOUTR+, VCOM1, VCOM2, VCOM3, IREF, IOUTL+, and IOUTL–: –0.3 to (VCC + 0.3) < 6.5 V; (8)Input current (except power supply): ±10 mA; (9)Ambient temperature under bias: –40 to 125 ℃; (10)Storage temperature: –55 to 150 ℃; (11)Junction temperature: 150 ℃; (12)Lead temperature (soldering): 260 ℃, 5 s; (13)Package temperature (reflow, peak): 235 ℃.

Features

PCM1738E features: (1)24-bit resolution; (2)analog performance (VCC = +5V):dynamic range: 117dB typ; SNR: 117dB typ; THD+N: 0.0004% typ; full-scale output: 2.2Vrms (at post amp); (3)differential current output: ±2.48mA; (4)sampling frequency: 10kHz to 200kHz; (5)system clock: 128, 192, 256, 384, 512,or 768fS with auto detect; (6)accepts 16-, 20-, and 24-bit audio data; (7)data formats: standard, i2s, and left-justified; (8)8x oversampling digital filter: Stopband Attenuation: –82dB; passband Ripple: ±0.002dB; (9)optional interface to external; (10)digital filter available; (11)optional interface to dsd de-; (12)coder for sacd playback; (13)user-programmable mode controls:digital attenuation: 0db to –120db, 0.5db/step; digital de-emphasis; digital filter roll-off: sharp or slow; soft mute; zero detect mute; zero flags for each output; (14)dual-supply operation:+5v analog, +3.3v digital; (15)5v tolerant digital inputs; (16)small SSOP-28 package.

Diagrams