4 ADC/8 DAC with PLL, 192 kHz, 24 Bit CODEC AD1935/AD1936/AD1937/AD1938/AD1939 Preliminary Technical Data Features Applications PLL generated (32-192kHz) or direct master clock Low EMI design 109 dB DAC/ 107dB ADC Dynamic Range and SNR -94dB THD+N Single 3.3V Supply Tolerance for 5V logic inputs Supports 24-bits and 8 kHz - 192 kHz sample rates Differential ADC input Single-ended or Differential DAC output versions Log volume control with "auto-ramp" function Hardware and software controllable clickless mute Software and hardware power-down Right justified, left justified, I2S and TDM Modes Master and slave modes up to 16 channel in/out 48-lead LQFP or 64-lead LQFP plastic package Automotive audio systems Home theater systems Set-top boxes Digital audio effects processors GENERAL DESCRIPTION The AD193X family are high performance, single-chip codecs that provide 4 ADCs with differential input and 8 DACs with either single-ended or differential output using ADI’s patented multibit sigma-delta architecture. An SPI® or I2C® port is included, allowing a microcontroller to adjust volume and many other parameters. The AD193X family operates from 3.3V digital and analog supplies. The AD193X is available in a 48-lead (SE output) or 64-lead (differential output) LQFP package. The AD193X is designed for low EMI. This consideration is apparent in both the system and circuit design architectures. By using the on-board PLL to derive master clock from L-R clock, the AD193X eliminates the need for a separate high frequency master clock. It can also be used with a suppressed bit clock. The D-A and A-D converters are designed using the latest ADI continuous time architectures to further minimize EMI. By using 3.3V supplies, power consumption is minimized, further reducing emissions. Functional Block Diagram Digital Audio Input/Output AD193X Serial Data Port DAC DAC SDATAOUT ADC Analog Audio Inputs ADC CLOCKS ADC ADC SDATAIN Digital Filter Timing Management & Control (Clock & PLL) Precision Voltage Reference Digital Filter & Volume Control DAC DAC DAC Analog Audio Outputs DAC DAC DAC Control Port SPI / I2C Control Data Input/Output Figure 1 Rev. PrI Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective companies. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.326.8703 © 2005 Analog Devices, Inc. All rights reserved. AD1935/AD1936/AD1937/AD1938/AD1939 Preliminary Technical Data AD193X—SPECIFICATIONS Test Conditions, Unless Otherwise Noted. Performance of all channels is identical (exclusive of the Inter-channel Gain Mismatch and Inter-channel Phase Deviation specifications). Parameter Supply Voltages (AVDD, DVDD) Case Temperature Master Clock Input Signal Input Sample Rate Measurement Bandwidth Word Width Load Capacitance (Digital Output) Load Current (Digital Output) Rating 3.3 V 25°C 12.288 MHz (48 kHz fS, 256 × fS Mode) 1.000 kHz, 0 dBFS (Full Scale), -1 dBVrms (0.9Vrms) 48 kHz 20 Hz to 20 kHz 24 Bits 50 pF ±1 mA or 1.5kΩ to ½ DVDD supply 2.0 V 0.8 V Input Voltage HI Input Voltage LO Table 1 Analog Performance Parameter ANALOG-TO-DIGITAL CONVERTERS DIGITAL-TO-ANALOG CONVERTERS 1 Min ADC Resolution (all ADCs) Dynamic Range (20 Hz to 20 kHz, –60 dB Input)1 No Filter (RMS) With A-Weighted Filter (RMS) With A-Weighted Filter (Avg) Total Harmonic Distortion + Noise (–1 dBFS)1 Full-Scale Input Voltage (Differential) Gain Error Interchannel Gain Mismatch Offset Error Gain Drift Interchannel Isolation CMRR, 100 mV RMS, 1 kHz CMRR, 100 mV RMS, 20 kHz Input Resistance Input Capacitance Input Common-Mode Bias Voltage Dynamic Range (20 Hz to 20 kHz, –60 dB Input)1 No Filter (RMS), Single-ended version With A-Weighted Filter (RMS), Single-ended version With A-Weighted Filter (Avg), Single-ended version No Filter (RMS), Differential version With A-Weighted Filter (RMS), Differential version With A-Weighted Filter (Avg), Differential version Total Harmonic Distortion + Noise (0 dBFS)1 Single-ended version Differential version Full-Scale Output Voltage (Single-ended version) Full-Scale Output Voltage (Differential version) Gain Error Typ 24 102 105 107 –92 1.9 –5.0 –0.1 –10 -6% 0 100 –110 70 70 14 10 1.5 +5.0 +0.1 +10 Unit Bits dB dB dB dB V rms % dB mV ppm/°C dB dB dB kΩ pF V 101 104 106 104 107 109 dB dB dB dB dB dB –92 –94 0.9 (2.5) 1.8 (5.0) TBD dB dB V rms (V pp) V rms (V pp) % Total harmonic distortion + noise and dynamic range typical specifications are for two channels active, max/min are all channels active. Rev. PrI | Page 2 of 30 Max +6% Preliminary Technical Data AD1935/AD1936/AD1937/AD1938/AD1939 Parameter REFERENCE Min -0.5 Interchannel Gain Mismatch Offset Error, Single-ended version Offset Error, Differential version Gain Drift Interchannel Isolation Interchannel Phase Deviation Volume Control Step Volume Control Range De-emphasis Gain Error Output Resistance at Each Pin Internal Reference Voltage, FILTR External Reference Voltage, FILTR Common-Mode Reference Output, CM Typ Max +0.5 -15 -10 -30 30 100 0 0.375 95 ±0.6 0.90 100 1.50 1.50 1.50 1.80 Unit dB mV mV ppm/°C dB Degrees dB dB dB Ω V V V Table 2 Crystal Oscillator Parameter Transconductance Min Typ 10 Max Unit mmhos Table 3 Digital I/O Parameter Input Voltage HI (VIH) Input Voltage LO (VIL) Input Leakage (IIH @ VIH = 2.4 V) Input Leakage (IIL @ VIL = 0.8 V) High Level Output Voltage (VOH) IOH = 4 mA Low Level Output Voltage (VOL) IOL = 4 mA Input Capacitance Min 2.0 Typ Max Unit V V µA µA V V pF 0.8 10 10 DVDD – 0.5 0.5 5 Table 4 Power Supplies Parameter Supplies Dissipation Power Supply Rejection Ratio Voltage, DVDD Voltage, AVDD Digital Current Digital Current—Power-Down Digital Current—Reset Analog Current Analog Current—Power-Down Analog Current—Reset Operation—All Supplies Operation—Digital Supply Operation—Analog Supply Power-Down—All Supplies 1 kHz 200 mV p-p Signal at Analog Supply Pins 20 kHz 200 mV p-p Signal at Analog Supply Pins Table 5 Rev. PrI | Page 3 of 30 Min 3.0 3.0 Typ 3.3 3.3 56 TBD TBD 74 TBD TBD 429 185 244 TBD TBD TBD Max 3.6 3.6 Unit V V mA mA mA mA mA mA mW mW mW mW dB dB AD1935/AD1936/AD1937/AD1938/AD1939 Preliminary Technical Data Temperature Range Parameter Specifications Guaranteed Min Typ 25 –40 –40 –65 Functionality Guaranteed Storage Max Unit °C Case °C Ambient °C Case °C +105 +125 +150 Table 6 Digital Filters Mode ADC DECIMATION FILTER All Modes, Typ @ 48 kHz 48 kHz Mode, Typ @ 48 kHz DAC INTERPOLATION FILTER 96 kHz Mode, Typ @ 96 kHz 192 kHz Mode, Typ @ 192 kHz Parameter Pass Band Pass-Band Ripple Transition Band Stop Band Stop-Band Attenuation Group Delay Pass Band Pass-Band Ripple Transition Band Stop Band Stop-Band Attenuation Group Delay Pass Band Pass-Band Ripple Transition Band Stop Band Stop-Band Attenuation Group Delay Pass Band Pass-Band Ripple Transition Band Stop Band Stop-Band Attenuation Group Delay Factor 0.4375 fS Min 0.5 fS 0.5625 fS Typ 21 ±0.015 24 27 Max 79 22.9844/ fS 0.4535 fS 479 22 0.5 fS 0.5465 fS 24 26 ±0.01 70 25/ fS 0.3646 fS 521 35 0.5 fS 0.6354 fS 48 61 ±0.05 70 11/ fS 0.3646 fS 115 70 0.5 fS 0.6354 fS 96 122 ±0.1 70 8/ fS 42 Unit kHz dB kHz kHz dB µs kHz dB kHz kHz dB µs kHz dB kHz kHz dB µs kHz dB kHz kHz dB µs Table 7 Timing Specifications Parameter MASTER CLOCK AND RESET SPI PORT tMH tML tMCLK fMCLK tMH tML tMCLK fMCLK tPDR MCLK High MCLK Low MCLK Period MCLK Frequency MCLK High MCLK Low MCLK Period MCLK Frequency PD/RST Low tPDRR PD/RST Recovery tCCH tCCL tCCP CCLK High CCLK Low CCLK Period Comments PLL Mode PLL Mode PLL Mode, 256 fS reference PLL Mode, 256 fS reference Direct 512 fS Mode Direct 512 fS Mode Direct 512 fS Mode Direct 512 fS Mode Reset to Active Output Rev. PrI | Page 4 of 30 Min 15 15 73 6.9 15 15 36 Max TBD Unit ns ns ns MHz ns ns ns MHz ns TBD tMCLK TBD TBD 50 ns ns ns 146 13.8 27.6 AD1935/AD1936/AD1937/AD1938/AD1939 Preliminary Technical Data Parameter I2C PORT Start Condition Stop Condition Slave Mode DAC SERIAL PORT Master Mode Slave Mode ADC SERIAL PORT Master Mode AUXILIARY INTERFACE Comments Min fCCLK tCDS tCDH tCLS CCLK Frequency CDATA Setup CDATA Hold CLATCH Setup To CCLK Rising From CCLK Rising To CCLK Rising TBD TBD TBD tCLH CLATCH Hold From CCLK Falling tCLH CLATCH High tCOE tCOD tCOH tCOTS fSCL tSCLH tSCLL tSCS COUT Enable COUT Delay COUT Hold COUT Three-State SCL Clock Frequency SCL High SCL Low Setup Time tSCH Hold Time tDS tSCR tSCF tSDR tSDF tSCS tDBH tDBL fDB tDLS tDLH tDLS tDDS tDDH tABH tABL fDB tALS tALH tALS tABDD tAXDS tAXDH tDXDD tXBH tXBL fXB Data Setup Time SCL Rise Time SCL Fall Time SDA Rise Time SDA Fall Time Setup Time DBCLK High DBCLK Low DBCLK Frequency DLRCLK Setup DLRCLK Hold DLRCLK Skew DSDATA Setup DSDATA Hold ABCLK High ABCLK Low ABCLK Frequency ALRCLK Setup ALRCLK Hold ALRCLK Skew ASDATA Delay AAUXDATA Setup AAUXDATA Hold DAUXDATA Delay AUXBCLK High AUXBCLK Low AUXBCLK Frequency AUXLRCLK Setup AUXLRCLK Hold tDLS tDLH From CCLK Falling From CCLK Falling From CCLK Falling From CCLK Falling Relevant for Repeated Start Condition After this period the 1st clock is generated Max 20 TBD ns TBD ns TBD TBD TBD TBD 400 µS µS µS 0.6 µS TBD TBD TBD ns ns ns ns ns µS ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns TBD TBD ns ns 300 300 300 300 To ABCLK Rising From ABCLK Rising From ABCLK Falling From ABCLK Falling To AUXBCLK Rising From AUXBCLK Rising From AUXBCLK Falling To AUXBCLK Rising From AUXBCLK Rising Table 8 Rev. PrI | Page 5 of 30 ns ns ns ns kHz 0.6 1.3 0.6 100 To DBCLK Rising From DBCLK Rising From DBCLK Falling To DBCLK Rising From DBCLK Rising Unit MHz ns ns ns 0.6 TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD AD1935/AD1936/AD1937/AD1938/AD1939 Preliminary Technical Data ABSOLUTE MAXIMUM RATINGS Package Characteristics Parameter Analog (AVDD) Digital (DVDD) Input Current (Except Supply Pins) Analog Input Voltage (Signal Pins) Digital Input Voltage (Signal Pins) Case Temperature (Operating) Min –0.3 –0.3 –0.3 –0.3 –40 Max +3.6 +3.6 ±20 AVDD + 0.3 DVDD + 0.3 +125 Unit V V mA V V °C Table 9 Stresses above those listed under the Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Parameter Min θJA (Thermal Resistance [Junction to Ambient]), 48-lead LQFP Typ 50.1 Max Unit °C/W θJC (Thermal Resistance [Junction to Case]), 48-lead LQFP 17 °C/W θJA (Thermal Resistance [Junction to Ambient]), 64-lead LQFP 47 °C/W θJC (Thermal Resistance [Junction to Case]), 64-lead LQFP 11.1 °C/W Note: Characteristics are for a 4-layer board Rev. PrI | Page 6 of 30 Table 10 Preliminary Technical Data AD1935/AD1936/AD1937/AD1938/AD1939 Figure 2. ADC Passband Filter Response, 48 kHz Figure 3. ADC Stopband Filter Response, 48 kHz Figure 4. DAC Passband Filter Response, 48 kHz Figure 5. DAC Stopband Filter Response, 48 kHz Figure 6. DAC Passband Filter Response, 96 kHz Figure 7. DAC Stopband Filter Response, 96 kHz Rev. PrI | Page 7 of 30 AD1935/AD1936/AD1937/AD1938/AD1939 Figure 8. DAC Passband Filter Response, 192 kHz Preliminary Technical Data Figure 9. DAC Stopband Filter Response, 192 kHz Rev. PrI | Page 8 of 30 AD1935/AD1936/AD1937/AD1938/AD1939 Preliminary Technical Data FUNCTIONAL OVERVIEW ADCs There are four ADC channels in the AD193X configured as two stereo pairs with differential inputs. The ADCs can operate at a nominal sample rate of 48, 96 , or 192 kHz. The ADCs include onboard digital anti-aliasing filters with 79 dB stop-band attenuation and linear phase response, operating at an oversampling ratio of 128 (48 kHz, 96 kHz, and 192 kHz modes). Digital outputs are supplied through two serial data output pins (one for each stereo pair) and a common frame (ALRCLK) and bit (ABCLK) clock. Alternatively, one of the TDM modes may be used to access up to 16 channels on a single TDM data line. The ADCs must be driven from a differential signal source for best performance. The input pins of the ADCs connect to internal switched capacitors. To isolate the external driving op amp from the “glitches” caused by the internal switched capacitors, each input pin should be isolated by using a series-connected external 100 Ω resistor together with a 1 nF capacitor connected from each input to ground. This capacitor must be of high quality; for example, ceramic NPO or polypropylene film. The differential inputs have a nominal common-mode voltage of 1.5V. The voltage at the common-mode reference pin, CM can be used to bias external op amps to buffer the input signals (see the Power Supply and Voltage Reference section). The inputs can also be AC coupled and do not need an external DC bias to CM. A digital high-pass filter can be switched in line with the ADCs under serial control to remove residual dc offsets. It has a 1.4 Hz, 6 dB per octave cutoff at a 48 kHz sample rate. The cutoff frequency will scale directly with sample frequency. DACs The AD193X DAC channels are arranged as four stereo pairs giving eight analog outputs, either single-ended for minimum external components or differential for improved noise and distortion performance. The DACs include on-board digital reconstruction filters with 70 dB stop-band attenuation and linear phase response, operating at an oversampling ratio of 4 (48 kHz or 96 kHz modes) or 2 (192 kHz mode). Each channel has its own independently programmable attenuator, adjustable in 255 0.375 dB steps. Digital inputs are supplied through four serial data input pins (one for each stereo pair) and a common frame (DLRCLK) and bit (DBCLK) clock. Alternatively, one of the TDM modes may be used to access up to 16 channels on a single TDM data line. Each output pin has a nominal common-mode dc level of 1.5V and swings ±1.27 V for a 0 dBFS digital input signal. A single op amp third order external low-pass filter is recommended to remove high frequency noise present on the output pins, as well as to provide differential-to-single-ended conversion in the case of the differential output part. Note that the use of op amps with low slew rate or low bandwidth may cause high frequency noise and tones to fold down into the audio band; care should be exercised in selecting these components. The voltage at the common-mode reference pin, CM can be used to bias the external op amps that buffer the output signals (see the Power Supply and Voltage Reference section). Clock Signals The on-chip Phase Locked Loop (PLL) can be selected to use as its reference the input sample rate from either of the LRCLK pins or 256, 384, 512, or 768 times the sample rate, referenced to 48kHz mode, from the MCLKI pin. The default at power-up is 256 × fS from MCLKI. In 96 kHz mode, the master clock frequency will stay at the same absolute frequency so the actual multiplication rate will be divided by 2. In 192 kHz mode, the actual multiplication rate will be divided by 4. For example, if the AD193X is programmed in 256 × fS mode, the frequency of the master clock input would be 256 × 48 kHz = 12.288 MHz. If the AD193X is then switched to 96 kHz operation (by writing to the SPI or I2C port), the frequency of the master clock should remain at 12.288 MHz, which is now 128 × fS. In 192kHz mode, this would be 64 × fS. The internal clock for the ADCs is 256 × fS for all clock modes. The internal clock for the DACs is 512 × fS (48 kHz mode), 256 × fS (96 kHz mode), or 128 × fS (192 kHz mode). By default, the on-board PLL is used to generate this internal master clock from an external clock. A direct 512 × fS ( referenced to 48 kHz mode) master clock can be used for either the ADCs or DACs if selected in PLL and Clock Control Register 1. Note that it is not possible to use a direct clock for the ADCs set to 192kHz mode. It is required that the on-chip PLL be used in this mode. The PLL can be powered down in PLL and Clock Control Register 0. To ensure reliable locking when changing PLL modes or if the reference clock may be unstable at power-on, the PLL should be powered down and then powered back up when the reference clock is stable. The internal MCLK can be disabled in PLL and Clock Control Register 0 to reduce power dissipation when the AD193X is idle. The clock should be stable before it is enabled. Unless a standalone mode is selected (see Serial Control Port), the clock is disabled by reset and must be enabled by writing to the SPI or I2C port for normal operation. To maintain the highest performance possible, it is recommended that the clock jitter of the internal master clock signal be limited to less than 300 ps rms TIE (time interval error). Even at these levels, extra noise or tones may appear in the DAC outputs if the jitter spectrum contains large spectral peaks. If the internal PLL is not being used, it is highly recommended that an independent crystal Rev. PrI | Page 9 of 30 AD1935/AD1936/AD1937/AD1938/AD1939 oscillator generate the master clock. In addition, it is especially important that the clock signal should not be passed through an FPGA, CPLD, or other large digital chip (such as a DSP) before being applied to the AD193X. In most cases, this will induce clock jitter due to the sharing of common power and ground connections with other unrelated digital output signals. When the PLL is used, jitter in the reference clock will be attenuated above a certain frequency depending on the loop filter. Reset and Power-Down Reset will set all the control registers to their default settings. To avoid pops, reset does not power down the analog outputs. After reset is de-asserted, an initialization routine will run inside the AD193X. This initialization lasts for approximately XX MCLKs. The power-down bits in the PLL and Clock Control 0, DAC Control 1, and ADC Control 1 registers will power down the respective sections. All other register settings are retained. Serial Control Port Preliminary Technical Data permits programming and reading back the internal control registers for the ADCs, DACs, and clock system. There is also a stand-alone mode available for operation without serial control, configured at reset using the serial control pins. All registers are set to default except Internal MCLK Enable is set to 1 and ADC BCLK and LRCLK Master/Slave is set by COUT/SDA. Refer to Table 10 for details. ADC Clocks: Slave Master CIN/ADR0 COUT/SDA CCLK/SCL CLATCH/ADR1 0 0 0 1 0 0 0 0 Table 11. Stand-alone Mode Selection The SPI control port of the AD1938 and AD1939 is a 4-wire serial control port. The format is similar to the Motorola SPI format except the input data-word is 24 bits wide. The serial bit clock and latch may be completely asynchronous to the sample rate of the ADCs and DACs. Figure 10 shows the format of the SPI signal. The first byte is a global address with a read/write bit. For the AD193X the address is 0x04, shifted left 1 bit due to the R/W bit. The second byte is the AD193X register address and the third byte is the data. The AD193X has an SPI or I2C compatible control port that tCLS tCCP CLATCH tCLH tCCH tCCL tCOTS CCLK tCDS tCDH D15 CIN COUT tCOE D14 D9 D8 D0 D9 D8 D0 tCOD Figure 10. Format of SPI Signal The I2C interface of the AD1936 and AD1937 is a two wire interface consisting of a clock line, SCL and a data line, SDA. SDA is bidirectional and the AD1936 and AD1937 will drive SDA either to acknowledge the master, ACK, or to send data during a read operation. The SDA pin for the I2C port is an open drain collector and requires a 1KΩ pullup resistor. A write or read access occurs when the SDA line is pulled low while the SCL line is high indicated by START in the timing diagrams. SDA is only allowed to change when SCL is low except when a START or STOP condition occurs as shown in figures 3 and 4. The first eight bits of the access consist of the device address and the R/W bit. The device address consists of an internal built-in address (0x04) and two address pins, AD1 and AD0. The two address pins allow up to four AD1936s and AD1937s to be used in a system. Initiating a write operation to the AD1936 and AD1937 involves sending a START condition and then sending the device address with the R/W set low. The AD1936 and AD1937 will respond by issuing an ACK to indicate that it has been addressed. The user then sends a second frame telling the AD1936 and AD1937 which register is required to be written to. Another ACK is issued by the AD1936 and AD1937. Finally the user can send another frame with the 8 data bits required to be written to the register. A third ACK is issued by the AD1936 and AD1937 after which the user can send a STOP condition to complete the data transfer. A read operation requires that the user first write to the AD1936 and AD1937 to point to the correct register and then read the data. This is achieved by sending a START condition followed by the device address frame, with R/W low, and then the register address frame. Following the ACK from the AD1936 and AD1937 the user must issue a REPEATED START condition. This is identical to a START condition. The next frame is the device address with R/W set high. On the next frame the AD1936 and AD1937 will output the register data on the SDA line. A STOP condition completes the read operation. Figure 3 and Figure 4 show examples of writing to and reading from the DAC 1 Left Volume Register (address = 0x06) Rev. PrI | Page 10 of 30 AD1935/AD1936/AD1937/AD1938/AD1939 Preliminary Technical Data SCK SDA 0 0 0 START BY MASTER 0 1 AD1 AD0 0 0 R/W FRAME 1 CHIP ADDRESS BYTE 0 0 1 0 1 0 ACK. BY AD193X ACK. BY AD193X FRAME 2 REGISTER ADDRESS BYTE 803-0039 SCK (CONTINUED) SDA (CONTINUED) D7 D6 D5 D4 D2 D3 D1 D0 ACK. BY STOP BY AD193X MASTER FRAME 3 DATA BYTE TO AD193X Figure 11. Format of I2C Write SCL SDA 0 0 0 START BY MASTER 0 1 AD1 AD0 0 R/W 0 ACK. BY AD193X FRAME 1 CHIP ADDRESS BYTE 0 0 0 1 1 0 ACK. BY AD193X FRAME 2 REGISTER ADDRESS BYTE SDA (Continued) 0 REPEATED START BY MASTER 0 0 0 1 AD1 AD0 R/W D7 ACK. BY AD193X FRAME 3 CHIP ADDRESS BYTE D6 D5 D4 D3 D2 FRAME 4 REGISTER DATA D1 803-0040 SCL (Continued) D0 ACK. BY AD193X STOP BY MASTER Figure 12. Format of I2C Read outputs are driven from the 3.3 V DVDD supply and are compatible with TTL and 3.3 V CMOS levels. Power Supply and Voltage Reference The AD193X is designed for 3.3 V supplies. Separate power supply pins are provided for the analog and digital sections. These pins should be bypassed with 100 nF ceramic chip capacitors, as close to the pins as possible, to minimize noise pickup. A bulk aluminum electrolytic capacitor of at least 22 µF should also be provided on the same PC board as the codec. For critical applications, improved performance will be obtained with separate supplies for the analog and digital sections. If this is not possible, it is recommended that the analog and digital supplies be isolated by means of a ferrite bead in series with each supply. It is important that the analog supply be as clean as possible. The AD1935 (64-pin single-ended version), and the AD1939 and AD1937 (64-pin differential versions) include a 3.3V regulator driver which requires only an external pass transistor and bypass capacitors to make a 5V to 3.3V regulator. If the regulator driver is not used, VSUPPLY, VDRIVE, and VSENSE should be connected to DGND. The ADC and DAC internal voltage reference VREF is brought out on FILTR and should be bypassed as close as possible to the chip, with a parallel combination of 10 µF and 100 nF. Any external current drawn should be limited to less than 50 µA. The internal reference can be disabled in PLL and Clock Control Register 1 and FILTR driven from an external source. This can be used to scale the DAC output to a power amplifier's clipping level based on its power supply voltage. The ADC input gain will also vary by the inverse ratio. The total gain from ADC input to DAC output will stay constant. The CM pin is the internal common-mode reference. It should be bypassed as close as possible to the chip, with a parallel combination of 10 µF and 100 nF. This voltage may be used to bias external op amps to the common-mode voltage of the input and output signal pins. The output current should be limited to less than 0.5 mA source and 2 mA sink. All digital inputs are compatible with TTL and CMOS levels. All Rev. PrI | Page 11 of 30 AD1935/AD1936/AD1937/AD1938/AD1939 Preliminary Technical Data at 48 kHz, 8 channels at 96 kHz or 4 channels at 192 kHz. There is also a dual-line TDM mode to support 8 channels at 192 kHz. Serial Data Ports—Data Format The eight DAC channels output or accept a common serial bit clock and left-right framing clock to clock in the serial data. The four ADC channels output or accept a common serial bit clock and leftright framing clock to clock out the data. The clock signals are all synchronous with the sample rate. In the AUX Modes, set in ADC Control 1 and DAC Control 0, the DACs use the ADC serial bit clock and left-right clock as the DAC clock pins are used for the auxiliary ADC/DAC serial clocks. The special auxiliary modes are provided to allow two external stereo ADCs and/or two external stereo DACs to be interfaced with the AD193X to provide up to 8 in/12 out operation or 2 AD193Xs to be chained for up to 16 in/16 out operation. These modes provide a glueless interface to a single SHARC serial port, allowing the DSP to access up to 16 channels of analog I/O. In these modes many pins are redefined, see table 10. See Figure 18 for details of these modes. The ADC and DAC serial data modes default to I2S. The ports can also be programmed for left-justified, right-justified and TDM modes. The word width is 24 bits by default and can be programmed for 16 or 20 bits. The normal TDM mode can be daisy-chained with a second AD193X and will support 16 channels LRCLK The following figures show the serial mode formats. LEFT CHANNEL RIGHT CHANNEL BCLK SDATA MSB MSB LSB LSB LEFT JUSTIFIED MODE––16 BITS TO 24 BITS PER CHANNEL LEFT CHANNEL LRCLK RIGHT CHANNEL BCLK SDATA LSB MSB MSB LSB I2S MODE––16 BITS TO 24 BITS PER CHANNEL RIGHT CHANNEL LEFT CHANNEL LRCLK BCLK MSB SDATA MSB LSB LSB RIGHT JUSTIFIED MODE––SELECT NUMBER OF BITS PER CHANNEL LRCLK BCLK SDATA MSB MSB LSB DSP MODE––16 BITS TO 24 BITS PER CHANNEL 1/fS NOTES 1. DSP MODE DOES NOT IDENTIFY CHANNEL 2. LRCLK NORMALLY OPERATES AT fS EXCEPT FOR DSP MODE WHICH IS 2 × fS 3. BCLK FREQUENCY IS NORMALLY 64 × LRCLK BUT MAY BE OPERATED IN BURST MODE Figure 13. Stereo Serial Modes Rev. PrI | Page 12 of 30 LSB AD1935/AD1936/AD1937/AD1938/AD1939 Preliminary Technical Data tDBH tDBP DBCLK tDBL tDLH tDLS DLRCLK tDDS DSDATA LEFT-JUSTIFIED MODE MSB MSB-1 tDDH tDDS DSDATA I2 S-JUSTIFIED MSB MODE tDDH tDDS tDDS DSDATA RIGHT-JUSTIFIED MODE LSB MSB tDDH tDDH Figure 14. DAC Serial Timing tABH tABP ABCLK tABL tALH tALS ALRCLK tABDD ASDATA LEFT-JUSTIFIED MODE MSB MSB-1 tABDD ASDATA I2 S-JUSTIFIED MODE MSB tABDD ASDATA RIGHT-JUSTIFIED MODE MSB Figure 15. ADC Serial Timing Rev. PrI | Page 13 of 30 LSB AD1935/AD1936/AD1937/AD1938/AD1939 Preliminary Technical Data LRCLK 256 BCLKs BCLK DATA 32 BCLKs SLOT 1 LEFT 1 SLOT 2 SLOT 3 RIGHT 1 LEFT 2 SLOT 4 SLOT 5 RIGHT 2 SLOT 6 SLOT 7 SLOT 8 LRCLK BCLK MSB MSB–1 DATA MSB–2 Figure 16. ADC TDM (8-channel I2Smode ) LRCLK 256 BCLKs BCLK DATA 32 BCLKs SLOT 1 LEFT 1 SLOT 2 SLOT 3 RIGHT 1 LEFT 2 SLOT 4 SLOT 5 RIGHT 2 LEFT 3 SLOT 6 SLOT 7 RIGHT 3 LEFT 4 SLOT 8 RIGHT 4 LRCLK BCLK MSB MSB–1 DATA MSB–2 Figure 17. DAC TDM (8-channel I2S mode) FSTDM TDM INTERFACE BCLK TDM ASDATA1 TDM (OUT) ASDATA MSB TDM MSB TDM 1ST CH 8TH CH ADC L1 ADC R1 ADC L2 ADC R2 AUX ADC L1 AUX ADC R1 AUX ADC L2 AUX ADC R2 32 DSDATA1 TDM (IN) DSDATA1 MSB TDM MSB TDM 1ST CH 8TH CH DAC L1 DAC R1 DAC L2 DAC R2 DAC L3 DAC R3 DAC L4 DAC R4 32 AUX - I2S INTERFACE AUX LRCLK (FROM AUX ADC 1) RIGHT LEFT AUX BCLK (FROM AUX ADC 1) AUX DATA IN 1 (FROM AUX ADC 1) I2S - MSB LEFT I2 S - MSB RIGHT AUX DATA IN 2 (FROM AUX ADC 2) I2S - MSB LEFT I2 S - MSB RIGHT AUX BCLK FREQUENCY IS 64 × FRAME-RATE; TDM BCLK FREQUENCY IS 256 × FRAME-RATE. Figure 18. AUX 256 Mode Timing (Note that the Clocks Are Not to Scale) Rev. PrI | Page 14 of 30 AD1935/AD1936/AD1937/AD1938/AD1939 Preliminary Technical Data Pin Function Changes in TDM and AUX Modes Pin Name ASDATA1 ASDATA2 DSDATA1 DSDATA2 DSDATA3 DSDATA4 ALRCLK ABCLK DLRCLK DBCLK Stereo Modes ADC1 Data Out ADC2 Data Out DAC1 Data In DAC2 Data In DAC3 Data In DAC4 Data In ADC LRCLK In/Out ADC BCLK In/Out DAC LRCLK In/Out DAC BCLK In/Out TDM Modes ADC TDM Data Out ADC TDM Data In DAC TDM Data In DAC TDM Data Out DAC TDM Data In 2 (dual-line mode) DAC TDM Data Out 2 (dual-line mode) ADC TDM Frame Sync In/Out ADC TDM BCLK In/Out DAC TDM Frame Sync In/Out DAC TDM BCLK In/Out AUX Modes TDM Data Out AUX Data Out 1 (to Ext. DAC 1) TDM Data In AUX Data In 1 (from Ext. ADC 1) AUX Data In 2 (from Ext. ADC 2) AUX Data Out 2 (to Ext. DAC 2) TDM Frame Sync In/Out TDM BCLK In/Out AUX LRCLK In/Out AUX BCLK In/Out Table 12 SHARC IS RUNNING IN SLAVE MODE (INTERRUPT-DRIVEN) TxDATA TxCLK TFS (NC) RxDATA SHARC RxCLK 12.288MHz FSYNC-TDM (RFS) 30MHz LRCLK LRCLK AUX ADC 1 BCLK ASDATA1 ALRCLK ABCLK DSDATA1 DATA BCLK DATA AUX DAC 1 MCLK MCLK DBCLK DLRCLK AD193X BCLK DSDATA2 TDM MASTER AUX MASTER DATA DSDATA3 MCLK MCLK LRCLK AUX ADC 2 LRCLK ASDATA2 BCLK DSDATA4 DATA MCLK Figure 19. Example of AUX Mode Connection to SHARC (AD193X as TDM Master/AUX Master shown) Rev. PrI | Page 15 of 30 AUX DAC 2 AD1935/AD1936/AD1937/AD1938/AD1939 Preliminary Technical Data PIN FUNCTION DESCRIPTIONS 48-Lead LQFP Plastic Package – AD1936, AD1938 Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 In/Out I I I I I O O O O I I I I I I I I/O I/O O O I/O I/O O I I I I O O O O I I I O I I O I I I I I I I I O I Mnemonic AGND MCLKI/XI MCLK/XO AGND AVDD OL3 OR3 OL4 OR4 PD/RST DSDATA4 DGND DVDD DSDATA3 DSDATA2 DSDATA1 DBCLK DLRCLK ASDATA2 ASDATA1 ABCLK ALRCLK CIN/ADR0 COUT/SDA DGND CCLK/SCL CLATCH/ADR1 OL1 OR1 OL2 OR2 AGND AVDD AGND FILTR AGND AVDD CM ADC1LP ADC1LN ADC1RP ADC1RN ADC2LP ADC2LN ADC2RP ADC2RN LF AVDD Description Analog Ground. Master Clock Input/ Crystal Oscillator Input. Master Clock Output/ Crystal Oscillator Output. Analog Ground. Analog Power Supply. Connect to analog 3.3 V supply. DAC 3 Left Output. DAC 3 Right Output. DAC 4 Left Output. DAC 4 Right Output. Power-Down Reset (Active Low). DAC Input 4 (Input to DAC 4 L and R). Digital Ground. Digital Power Supply. Connect to digital 3.3 V supply. DAC Input 3 (Input to DAC 3 L and R). DAC Input 2 (Input to DAC 2 L and R). DAC Input 1 (Input to DAC 1 L and R). Bit Clock for DACs. LR Clock for DACs. ADC Serial Data Output 2 (ADC 2 L and R). ADC Serial Data Output 1 (ADC 1 L and R). Bit Clock for ADCs. LR Clock for ADCs. Control Data Input (SPI)/Address 0 (I2C). Control Data Output (SPI)/Serial Data (I2C). Digital Ground. Control Clock Input (SPI)/Serial Clock (I2C). Latch Input for Control Data (SPI)/Address 1 (I2C). DAC 1 Left Output. DAC 1 Right Output. DAC 2 Left Output. DAC 2 Right Output. Analog Ground. Analog Power Supply. Connect to analog 3.3 V supply. Analog Ground. Voltage Reference Filter Capacitor Connection. Bypass with 10 µF||100 nF to AGND. Analog Ground. Analog Power Supply. Connect to analog 3.3 V supply. Common Mode Reference Filter Capacitor Connection. Bypass with 10 µF||100 nF to AGND. ADC1 Left Positive Input. ADC1 Left Negative Input. ADC1 Right Positive Input. ADC1 Right Negative Input. ADC2 Left Positive Input. ADC2 Left Negative Input. ADC2 Right Positive Input. ADC2 Right Negative Input. PLL Loop Filter, Return to AVDD. Analog Power Supply. Connect to analog 3.3 V supply. Table 13. Pin Function Description—48-Lead LQFP( AD1936, AD1938) Rev. PrI | Page 16 of 30 Preliminary Technical Data AD1935/AD1936/AD1937/AD1938/AD1939 64-Lead LQFP Plastic Package – AD1937, AD1939 Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 In/Out I I I I I O O O O O O O O I I I I I I I I/O I/O O O I/O I/O I I/O I I I I O O O O O O O O I I I O I I Mnemonic AGND MCLKI/XI MCLK/XO AGND AVDD OL3P OL3N OR3P OR3N OL4P OL4N OR4P OR4N PD/RST DSDATA4 DGND DVDD DSDATA3 DSDATA2 DSDATA1 DBCLK DLRCLK VSUPPLY VSENSE VDRIVE ASDATA2 ASDATA1 ABCLK ALRCLK CIN/ADR0 COUT/SDA DVDD DGND CCLK/SCL CLATCH/ADR1 OL1P OL1N OR1P OR1N OL2P OL2N OR2P OR2N AGND AVDD AGND FILTR AGND AVDD Description Analog Ground. Master Clock Input/ Crystal Oscillator Input. Master Clock Output/ Crystal Oscillator Output. Analog Ground. Analog Power Supply. Connect to analog 3.3 V supply. DAC 3 Left Positive Output. DAC 3 Left Negative Output. DAC 3 Right Positive Output. DAC 3 Right Negative Output. DAC 4 Left Positive Output. DAC 4 Left Negative Output. DAC 4 Right Positive Output. DAC 4 Right Negative Output. Power-Down Reset (Active Low). DAC Input 4 (Input to DAC 4 L and R). Digital Ground. Digital Power Supply. Connect to digital 3.3 V supply. DAC Input 3 (Input to DAC 3 L and R). DAC Input 2 (Input to DAC 2 L and R). DAC Input 1 (Input to DAC 1 L and R). Bit Clock for DACs. LR Clock for DACs. +5V Input to Regulator, Emitter of Pass Transistor +3.3V Output of Regulator, Collector of Pass Transistor Drive for Base of Pass Transistor ADC Serial Data Output 2 (ADC 2 L and R). ADC Serial Data Output 1 (ADC 1 L and R). Bit Clock for ADCs. LR Clock for ADCs. Control Data Input (SPI)/Address 0 (I2C). Control Data Output (SPI)/Serial Data (I2C). Digital Power Supply. Connect to digital 3.3 V supply. Digital Ground. Control Clock Input (SPI)/Serial Clock (I2C). Latch Input for Control Data (SPI)/Address 1 (I2C). DAC 1 Left Positive Output. DAC 1 Left Negative Output. DAC 1 Right Positive Output. DAC 1 Right Negative Output. DAC 2 Left Positive Output. DAC 2 Left Negative Output. DAC 2 Right Positive Output. DAC 2 Right Negative Output. Analog Ground. Analog Power Supply. Connect to analog 3.3 V supply. Analog Ground. Voltage Reference Filter Capacitor Connection. Bypass with 10 µF||100 nF to AGND. Analog Ground. No Connect. No Connect. Analog Power Supply. Connect to analog 3.3 V supply. Rev. PrI | Page 17 of 30 AD1935/AD1936/AD1937/AD1938/AD1939 Pin No. 52 53 54 55 56 57 58 59 60 61 62 63 64 In/Out O I I I I I I I I O I Mnemonic CM ADC1LP ADC1LN ADC1RP ADC1RN ADC2LP ADC2LN ADC2RP ADC2RN LF AVDD Preliminary Technical Data Description Common Mode Reference Filter Capacitor Connection. Bypass with 10 µF||100 nF to AGND. ADC1 Left Positive Input. ADC1 Left Negative Input. ADC1 Right Positive Input. ADC1 Right Negative Input. ADC2 Left Positive Input. ADC2 Left Negative Input. ADC2 Right Positive Input. ADC2 Right Negative Input. PLL Loop Filter, Return to AVDD. Analog Power Supply. Connect to analog 3.3 V supply. No Connect. No Connect. Table 14. Pin Function Description—64-Lead LQFP (AD1937, AD1939) 64-Lead LQFP Plastic Package – AD1935 Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 In/Out I I I I I O O O O O O O O I I I I I I I I/O I/O O O I/O I/O I I/O I I I I Mnemonic AGND MCLKI/XI MCLK/XO AGND AVDD OL3 OR3 OL4 OR4 PD/RST DSDATA4 DGND DVDD DSDATA3 DSDATA2 DSDATA1 DBCLK DLRCLK VSUPPLY VSENSE VDRIVE ASDATA2 ASDATA1 ABCLK ALRCLK CIN COUT DVDD DGND CCLK CLATCH Description Analog Ground. Master Clock Input/ Crystal Oscillator Input. Master Clock Output/ Crystal Oscillator Output. Analog Ground. Analog Power Supply. Connect to analog 3.3 V supply. DAC 3 Left Output. No Connect. DAC 3 Right Output. No Connect. DAC 4 Left Output. No Connect. DAC 4 Right Output. No Connect. Power-Down Reset (Active Low). DAC Input 4 (Input to DAC 4 L and R). Digital Ground. Digital Power Supply. Connect to digital 3.3 V supply. DAC Input 3 (Input to DAC 3 L and R). DAC Input 2 (Input to DAC 2 L and R). DAC Input 1 (Input to DAC 1 L and R). Bit Clock for DACs. LR Clock for DACs. +5V Input to Regulator, Emitter of Pass Transistor +3.3V Output of Regulator, Collector of Pass Transistor Drive for Base of Pass Transistor ADC Serial Data Output 2 (ADC 2 L and R). ADC Serial Data Output 1 (ADC 1 L and R). Bit Clock for ADCs. LR Clock for ADCs. Control Data Input (SPI) Control Data Output (SPI) Digital Power Supply. Connect to digital 3.3 V supply. Digital Ground. Control Clock Input (SPI) Latch Input for Control Data (SPI) Rev. PrI | Page 18 of 30 AD1935/AD1936/AD1937/AD1938/AD1939 Preliminary Technical Data Pin No. 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 In/Out O O O O O O O O I I I O I Mnemonic OL1 AGND AVDD AGND FILTR AGND I O I I I I I I I I O I AVDD CM ADC1LP ADC1LN ADC1RP ADC1RN ADC2LP ADC2LN ADC2RP ADC2RN LF AVDD OR1 OL2 OR2 Description DAC 1 Left Output. No Connect. DAC 1 Right Output. No Connect. DAC 2 Left Output. No Connect. DAC 2 Right Output. No Connect. Analog Ground. Analog Power Supply. Connect to analog 3.3 V supply. Analog Ground. Voltage Reference Filter Capacitor Connection. Bypass with 10 µF||100 nF to AGND. Analog Ground. No Connect. No Connect. Analog Power Supply. Connect to analog 3.3 V supply. Common Mode Reference Filter Capacitor Connection. Bypass with 10 µF||100 nF to AGND. ADC1 Left Positive Input. ADC1 Left Negative Input. ADC1 Right Positive Input. ADC1 Right Negative Input. ADC2 Left Positive Input. ADC2 Left Negative Input. ADC2 Right Positive Input. ADC2 Right Negative Input. PLL Loop Filter, Return to AVDD. Analog Power Supply. Connect to analog 3.3 V supply. No Connect. No Connect. Table 15. Pin Function Description—64-Lead LQFP (AD1935) CM AVDD ADC1LP ADC1LN ADC1RP ADC2RN ADC2LP ADC2LN ADC2RP ADC2RN AVDD LF PIN CONFIGURATION 48 47 46 45 44 43 42 41 40 39 38 37 AGND 1 36 AGND MCLKI/XI 2 35 MCLKO/XO 3 34 FILTR AGND AGND 4 33 AD193X AVDD 5 32 TOP VIEW (Not to Scale) OL3 6 OR3 7 31 30 Single-ended Output OL4 8 OR4 9 29 28 PD/RST 10 DSDATA4 11 Preliminary OR2 OL2 OR1 OL1 26 CLATCH/ADR1 CCLK/SCL 25 DGND 27 DGND 12 AVDD AGND COUT/SDA ABCLK ALRCLK CIN/ADR0 ASDATA1 DBCLK DLRCLK ASDATA2 DSDATA1 DSDATA2 DVDD DSDATA3 13 14 15 16 17 18 19 20 21 22 23 24 Figure 20. Single-ended Output 48-Lead LQFP (AD1936, AD1938) Rev. PrI | Page 19 of 30 NC NC CM AVDD ADC1LN ADC1LP ADC2RN Preliminary Technical Data ADC1RP ADC2LN ADC2LP ADC2RN ADC2RP LF AVDD NC NC AD1935/AD1936/AD1937/AD1938/AD1939 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 AGND 1 48 AGND MCLKI/XI 2 47 FILTR MCLKO/XO 3 46 AGND 4 45 AGND AVDD AVDD 5 44 AGND OL3P 6 43 OR2N 42 OR2P AD193X OL3N 7 TOP VIEW (Not to Scale) OR3P 8 OR3N 9 41 40 Differential Output OL4P 10 OL4N 11 39 38 OR4P 12 OR4N 13 37 Preliminary PD/RST 14 DSDATA4 15 36 OR1N OR1P OL1N OL1P 34 CLATCH/ADR1 CCLK/SCL 33 DGND 35 DGND 16 OL2N OL2P DVDD COUT/SDA ALRCLK CIN/ADR0 ABCLK ASDATA1 VDRIVE ASDATA2 VSENSE DLRCLK VSUPPLY DSDATA1 DBCLK DVDD DSDATA3 DSDATA2 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 NC NC CM AVDD ADC1LN ADC1LP ADC2RN ADC1RP ADC2LN ADC2LP ADC2RP ADC2RN LF AVDD NC NC Figure 21. Differential Output 64-Lead LQFP (AD1937, AD1939) 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 AGND 1 48 AGND MCLKI/XI 2 47 FILTR MCLKO/XO 3 46 AGND 4 45 AGND AVDD AVDD 5 44 AGND OL3 6 43 NC 42 OR2 AD193X NC 7 TOP VIEW (Not to Scale) OR3 8 NC 9 41 40 Single-ended Output OL4 10 39 NC 11 38 OR4 12 NC 13 Preliminary 37 36 NC OL2 NC OR1 NC OL1 PD/RST 14 DSDATA4 15 34 CLATCH CCLK DGND 16 33 DGND 35 COUT DVDD CIN ALRCLK ABCLK ASDATA1 VDRIVE ASDATA2 VSENSE DLRCLK VSUPPLY DSDATA1 DBCLK DVDD DSDATA3 DSDATA2 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 Figure 22. Single-ended Output Output 64-Lead LQFP (AD1935) Rev. PrI | Page 20 of 30 Preliminary Technical Data AD1935/AD1936/AD1937/AD1938/AD1939 APPLICATION CIRCUITS Figure 23. Typical ADC Input Filter Circuit Figure 24. Typical DAC Output Filter Circuit (Single-ended, Non-inverting) Figure 25. Typical DAC Output Filter Circuit (Single-ended, Inverting) Figure 26. Typical DAC Output Filter Circuit (Differential) Rev. PrI | Page 21 of 30 AD1935/AD1936/AD1937/AD1938/AD1939 Preliminary Technical Data Figure 27. Recommended Loop Filters for LRCLK or MCLK PLL reference. Figure 28. Recommended 3.3V Regulator Circuit (64-lead versions) Rev. PrI | Page 22 of 30 Preliminary Technical Data AD1935/AD1936/AD1937/AD1938/AD1939 REGISTER DEFINITIONS Register format Bit Global Address 23:17 R/W 16 Register Address 15:8 Data 7:0 Table 16 Note 1: The format is the same for I2C and SPI. Note 2: Global address for the AD193X series is 0x04, shifted left 1 bit due to the R/W bit. Note 3: In I2C, ADR0 and ADR1 are ORed into bits 17 and 18 to provide multiple chip addressing. Note 4: All registers are reset to 0, except for the DAC volume registers which are set to full volume. Register addresses and functions Address 0 1 Function PLL and Clock Control 0 PLL and Clock Control 1 2 DAC Control 0 3 DAC Control 1 4 DAC Control 2 5 DAC Individual Channel Mutes 6 DAC 1L Vol Control 7 DAC 1R Vol Control 8 DAC 2L Vol Control 9 DAC 2R Vol Control 10 DAC 3L Vol Control 11 DAC 3R Vol Control 12 DAC 4L Vol Control 13 DAC 4R Vol Control 14 ADC Control 0 15 ADC Control 1 16 ADC Control 2 Table 17 Rev. PrI | Page 23 of 30 AD1935/AD1936/AD1937/AD1938/AD1939 Preliminary Technical Data PLL AND CLOCK CONTROL REGISTERS PLL and Clock control 0 Bit 0 2:1 4:3 6:5 7 Value 0 1 00 01 10 11 00 01 10 11 00 01 10 11 0 1 Function Normal operation Power down INPUT 256 (x 44.1 or 48kHz) INPUT 384 (x 44.1 or 48kHz) INPUT 512 (x 44.1 or 48kHz) INPUT 768 (x 44.1 or 48kHz) XTAL Oscillator Enabled 256xfs VCO Output 512xfs VCO Output Off MCLK DLRCLK ALRCLK Reserved Disable: ADC and DAC Idle Enable: ADC and DAC Active Description PLL power down MCLK pin functionality (PLL active) MCLK_O pin PLL input Internal MCLK Enable Table 18 PLL and Clock control 1 Bit 0 1 2 3 7:4 Value 0 1 0 1 0 1 0 1 0000 Function PLL Clock MCLK PLL Clock MCLK Enabled Disabled Not Locked Locked Reserved Description DAC Clock Source Select ADC Clock Source Select On-chip Voltage Reference PLL Lock Indicator (Read Only) Table 19 Rev. PrI | Page 24 of 30 Preliminary Technical Data AD1935/AD1936/AD1937/AD1938/AD1939 DAC CONTROL REGISTERS DAC control 0 Bit 0 2:1 5:3 7:6 Value 0 1 00 01 10 11 000 001 010 011 100 101 110 111 00 01 10 11 Function Normal Power down 32/44.1/48 kHz 64/88.2/96 kHz 128/176.4/192 kHz Reserved 1 0 8 12 16 Reserved Reserved Reserved Stereo (Normal) TDM (Daisy Chain) DAC Aux mode (ADC, DAC TDM coupled) Dual-line TDM Description Power Down Sample Rate SDATA Delay (BCLK periods) Serial Format Table 20 DAC control 1 Bit 0 2:1 3 4 5 6 7 Value 0 1 00 01 10 11 0 1 0 1 0 1 0 1 0 1 Function Latch in mid cycle (normal) Latch in at end of cycle (pipeline) 64 (2 channels) 128 (4 channels) 256 (8 channels) 512 (16 channels) Left low Left high Slave Master Slave Master DBCLK pin Internally generated Normal Inverted Description BCLK Active Edge (TDM In) BCLKs Per Frame LRCLK Polarity LRCLK Master/Slave BCLK Master/Slave BCLK Source BCLK Polarity Table 21 Rev. PrI | Page 25 of 30 AD1935/AD1936/AD1937/AD1938/AD1939 Preliminary Technical Data DAC control 2 Bit 0 2:1 4:3 5 7:6 Value 0 1 00 01 10 11 00 01 10 11 0 1 00 Function Unmute Mute Flat 48 kHz Curve 44.1 kHz Curve 32 kHz Curve 24 20 Reserved 16 Non-inverted Inverted Reserved Description Master Mute Deemphasis (32/44.1/48 kHz mode only) Word width DAC Output Polarity Table 22 DAC Individual Channel Mutes Bit 0 1 2 3 4 5 6 7 Value 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 Function Unmute Mute Unmute Mute Unmute Mute Unmute Mute Unmute Mute Unmute Mute Unmute Mute Unmute Mute Description DAC 1 Left Mute DAC 1 Right Mute DAC 2 Left Mute DAC 2 Right Mute DAC 3 Left Mute DAC 3 Right Mute DAC 4 Left Mute DAC 4 Right Mute Table 23 DAC Volume Controls Bit 7:0 Value 0 1-254 255 Function No attenuation -3/8 dB per step Full Attenuation Description DAC Volume Control Table 24 Rev. PrI | Page 26 of 30 AD1935/AD1936/AD1937/AD1938/AD1939 Preliminary Technical Data ADC CONTROL REGISTERS ADC control 0 Bit 0 1 2 3 4 5 7:6 Value 0 1 0 1 0 1 0 1 0 1 0 1 00 01 10 11 Function Normal Power down Off On Unmute Mute Unmute Mute Unmute Mute Unmute Mute 32/44.1/48 64/88.2/96 128/176.4/192 Reserved Description Power Down Highpass Filter ADC 1L mute ADC 1R mute ADC 2L mute ADC 2R mute Output Sample Rate Table 25 ADC control 1 Bit 1:0 4:2 6:5 7 Value 00 01 10 11 000 001 010 011 100 101 110 111 00 01 10 11 0 1 Function 24 20 Reserved 16 1 0 8 12 16 Reserved Reserved Reserved Stereo TDM (Daisy Chain) ADC Aux mode (ADC, DAC TDM coupled) Reserved Latch in mid cycle (normal) Latch in at end of cycle (pipeline) Table 26. Rev. PrI | Page 27 of 30 Description Word width SDATA delay (BCLK periods) Serial Format BCLK Active Edge (TDM In) AD1935/AD1936/AD1937/AD1938/AD1939 Preliminary Technical Data ADC control 2 Bit 0 1 2 3 5:4 6 7 Value 0 1 0 1 0 1 0 1 00 01 10 11 0 1 0 1 Function 50/50 (allows 32/24/20/16 BCLK/channel) Pulse (32 BCLK/channel) Drive out on falling edge (DEF) Drive out on rising edge Left Low Left High Slave Master 64 128 256 512 Slave Master ABCLK pin Internally generated Table 27 Rev. PrI | Page 28 of 30 Description LRCLK Format BCLK Polarity LRCLK Polarity LRCLK Master/Slave BCLKs per frame BCLK Master/Slave BCLK Source AD1935/AD1936/AD1937/AD1938/AD1939 Preliminary Technical Data OUTLINE DIMENSIONS 0.75 0.60 0.45 9.00 BSC SQ 1.60 MAX 37 48 36 1 PIN 1 0.15 0.05 7.00 BSC SQ TOP VIEW 1.45 1.40 1.35 SEATING PLANE VIEW A 0.20 0.09 7° 3.5° 0° 0.08 MAX COPLANARITY (PINS DOWN) 25 12 13 VIEW A 0.50 BSC LEAD PITCH 24 0.27 0.22 0.17 ROTATED 90° CCW COMPLIANT TO JEDEC STANDARDS MS-026-BBC Figure 29. 48-Lead Low Profile Quad Flat Package [LQFP] (ST-48) Dimensions shown in millimeters Figure 30. 64-Lead Low Profile Quad Flat Package [LQFP] (ST-64) Dimensions shown in millimeters ESD CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although this product features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality. Rev. PrI | Page 29 of 30 AD1935/AD1936/AD1937/AD1938/AD1939 Preliminary Technical Data Ordering Guide AD193X Products AD1935XSTZ AD1935XSTZRL AD1936XSTZ AD1936XSTZRL AD1937XSTZ AD1937XSTZRL AD1938XSTZ AD1938XSTZRL AD1939XSTZ AD1939XSTZRL EVAL-AD1935EB EVAL-AD1936EB EVAL-AD1937EB EVAL-AD1938EB EVAL-AD1939EB Temperature Package (ambient) –40°C to +105°C –40°C to +105°C –40°C to +105°C –40°C to +105°C –40°C to +105°C –40°C to +105°C –40°C to +105°C –40°C to +105°C –40°C to +105°C –40°C to +105°C Package Description 64-Lead LQFP, SE out, SPI control w/ reg 64-Lead LQFP, SE out, SPI control w/ reg 48-Lead LQFP, SE out, I2C control 48-Lead LQFP, SE out, I2C control 64-Lead LQFP, Diff out, I2C control 64-Lead LQFP, Diff out, I2C control 48-Lead LQFP, SE out, SPI control 48-Lead LQFP, SE out, SPI control 64-Lead LQFP, Diff out, SPI control 64-Lead LQFP, Diff out, SPI control AD1935 Evaluation Board AD1936 Evaluation Board AD1937 Evaluation Board AD1938 Evaluation Board AD1939 Evaluation Board Note: All parts are lead-free Table 28. Ordering Guide © 2005 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective companies. Printed in the U.S.A. PR05582-0-5/05(PrI) Rev. PrI | Page 30 of 30 Package Option ST-64 ST-64 on 13” Reels ST-48 ST-48 on 13” Reels ST-64 ST-64 on 13” Reels ST-48 ST-48 on 13” Reels ST-64 ST-64 on 13” Reels