a Stereo, 96 kHz, Multibit DAC AD1854 PRODUCT OVERVIEW FEATURES The AD1854 is a high performance, single-chip stereo, audio 5 V Stereo Audio DAC System DAC delivering 113 dB Dynamic Range and 112 dB SNR Accepts 16-/18-/20-/24-Bit Data (A-weightednot muted) at 48 kHz sample rate. It is comprised Supports 24 Bits and 96 kHz Sample Rate of a multibit sigma-delta modulator with dither, continuous Multibit Sigma-Delta Modulator with Perfect Differential time analog filters and analog output drive circuitry. Other features Linearity Restoration for Reduced Idle Tones and include an on-chip stereo attenuator and mute, programmed Noise Floor through an SPI-compatible serial control port. The AD1854 Data Directed Scrambling DACLeast Sensitive to Jitter is fully compatible with current DVD formats, including 96 kHz Differential Output for Optimum Performance sample frequency and 24 bits. It is also backwards compatible 113 dB Dynamic Range at 48 kHz Sample Rate by supporting 50 s/15 s digital de-emphasis intended for (AD1854KRS) redbook 44.1 kHz sample frequency playback from com- 112 dB Signal-to-Noise at 48 kHz Sample Rate (AD1854KRS) pact discs. 101 THD+N (AD1854KRS) The AD1854 has a very simple but very flexible serial data input On-Chip Volume Control with 1024 Steps port that allows for glueless interconnection to a variety of ADCs, Hardware and Software Controllable Clickless Mute DSP chips, AES/EBU receivers and sample rate converters. Zero Input Flag Outputs for Left and Right Channels 2 The AD1854 can be configured in left-justified, I S, and right- Digital De-Emphasis Processing justified. The AD1854 accepts serial audio data in MSB first, Supports 256 F or 384 F Master Mode Clock S S twos-complement format. A power-down mode is offered to mini- Switchable Clock Doubler mize power consumption when the device is inactive. The AD1854 Power-Down Mode Plus Soft Power-Down Mode operates from a single 5 V power supply. It is fabricated on a single Flexible Serial Data Port with Right-Justified, Left- monolithic integrated circuit and housed in a 28-lead SSOP 2 Justified, and I S-Compatible package for operation over the temperature range 0C to 70C. 28-Lead SSOP Plastic Package APPLICATIONS DVD, CD, Set-Top Boxes, Home Theater Systems, Automotive Audio Systems, Sampling Musical Keyboards, Digital Mixing Consoles, Digital Audio Effects Processors FUNCTIONAL BLOCK DIAGRAM 96/48F CONTROL DATA DIGITAL CLOCK S INPUT SUPPLY IN CLOCK VOLUME 2 MUTE 3 SERIAL CONTROL VOLTAGE CLOCK AD1854 CIRCUIT INTERFACE REFERENCE 8 F ATTEN/ S MULTIBIT SIGMA- OUTPUT DAC DELTA MODULATOR MUTE INTERPOLATOR BUFFER SERIAL 16-/18-/20-/24-BIT ANALOG DATA DIGITAL OUTPUTS INTERFACE 8 F DATA INPUT MULTIBIT SIGMA- OUTPUT ATTEN/ S DAC BUFFER INTERPOLATOR DELTA MODULATOR MUTE 2 SERIAL MODE 2 2 PD/RST MUTE DE-EMPHASIS ANALOG ZERO SUPPLY FLAG REV. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. use, nor for any infringements of patents or other rights of third parties Tel: 781/329-4700 World Wide Web Site: AD1854SPECIFICATIONS TEST CONDITIONS UNLESS OTHERWISE NOTED Supply Voltages (AV , DV ) 5.0 V DD DD Ambient Temperature 25C Input Clock 12.288 MHz (256 F Mode) S Input Signal 1.0013 kHz 0.5 dB Full Scale Input Sample Rate 48 kHz Measurement Bandwidth 20 Hz to 20 kHz Word Width 20 Bits Load Capacitance 100 pF Load Impedance 47 k Input Voltage HI 2.4 V Input Voltage LO 0.8 V Performance of right and left channels are identical (exclusive of the Interchannel Gain Mismatch and Interchannel Phase Deviation specifications). ANALOG PERFORMANCE Min Typ Max Unit Resolution 20 Bits Signal-to-Noise Ratio (20 Hz to 20 kHz) No Filter (AD1854JRS) 105 dB No Filter (AD1854KRS) 110 dB With A-Weighted Filter (AD1854JRS) 108 dB With A-Weighted Filter (AD1854KRS) 112 dB Dynamic Range (20 Hz to 20 kHz, 60 dB Input) No Filter (AD1854JRS) 105 dB No Filter (AD1854KRS) 106 110 dB With A-Weighted Filter (AD1854JRS) 108 dB With A-Weighted Filter (AD1854KRS) 108 113 dB Total Harmonic Distortion + Noise (AD1854JRS) V = 0 dB 88 97 dB O Total Harmonic Distortion + Noise (AD1854KRS) V = 0 dB 94 101 dB O Total Harmonic Distortion + Noise (AD1854JRS and 89 dB AD1854KRS) V = 20 dB O Total Harmonic Distortion + Noise (AD1854JRS and 49 dB AD1854KRS) V = 60 dB O Analog Outputs Differential Output Range (Full Scale) 5.6 V p-p Output Impedance at Each Output Pin <200 Output Capacitance at Each Output Pin 20 pF Out-of-Band Energy (0.5 F to 100 kHz) 72.5 dB S CMOUT 2.25 V DC Accuracy Gain Error 11.0 3.0 +11.0 % Interchannel Gain Mismatch 0.15 +0.15 dB Gain Drift 200 300 ppm/C Interchannel Crosstalk (EIAJ Method) 120 dB Interchannel Phase Deviation 0.1 Degrees Mute Attenuation 100 dB De-Emphasis Gain Error 0.1 dB DIGITAL I/O (0 C to 70 C) Min Typ Max Unit Input Voltage HI (V ) 2.2 V IH Input Voltage LO (V ) 0.8 V IL High Level Output Voltage (V ) I = 1 mA 2.0 V OH OH Low Level Output Voltage (V ) I = 1 mA 0.4 V OL OL Input Leakage (I V = 2.4 V) 10 A IH IH Input Leakage (I V = 0.8 V) 10 A IL IL Input Capacitance 20 pF 2 REV. A OBSOLETE