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| www..com UNISONIC TECHNOLOGIES CO.,LTD UA2311 16 BITS DIGITAL to ANALOG CONVERTER DESCRIPTION UTC UA2311 is a 16-bits Digital-to-Analog Converter(DAC) designed for stereo audio applications and manufactured by CMOS Technologies with low power consumption It converts the 16 bits serial data into an analog output voltage by an R-string voltage divider. Each output channel voltage is driven by an operational amplifier allowing easy analog output. In sound cards test, the 44.1KHz or higher sampling rate is available. SOP-8 CMOS IC DIP-8 FEATURES * CMOS Technology * Low Power Consumption * Two Voltage Output Channels in the same chip * 16-bits Dynamic Range * Low Total Harmonic Distortion * 5V(typ.) Single Power Supply *Pb-free plating product number: UA2311L PIN DESCRIPTION PIN NO 1 2 3 4 5 6 7 8 PIN NAME BCK WS DATA GND VDD VOL NC VOR DESCRIPTION Bit Clock Input Word Select Input Data Input Ground Positive Power Supply Left Channel Output Not Connected Right Channel Output ORDERING INFORMATION Ordering Number Normal Lead Free Plating UA2311-S08-R UA2311L-S08-R UA2311-S08-T UA2311L-S08-T UA2311-D08-T UA2311L-D08-T Package SOP-8 SOP-8 DIP-8 Packing Tape Reel Tube Tube www.unisonic.com.tw Copyright (c) 2005 Unisonic Technologies Co.,LTD 1 QW-R502-043,A UA2311 PIN CONFIGURATION CMOS IC BCK WS DATA GND 1 2 3 4 8 7 6 5 VOR NC VOL VDD BLOCK DIAGRAM Floating Conversion VCC BCK WS 1 DAC out + op - 8 VOR 2 3 Data Latch out + op - 7 NC DATA GND 4 Floating Conversion out + op DAC 6 VOL 5 VDD UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 QW-R502-043,A UA2311 ABSOLUTE MAXIMUM RATING CMOS IC PARAMETER SYMBOL RATINGS Power Supply Voltage VDD -3.0 ~ +7.0 Input Voltage VIN -0.3 ~ VDD+0.3 Operating Temperature TOPR 0 ~ +70 Storage Temperature TSTG -40 ~ +150 Note: 1. The typical power supply voltage propose at 5V, and range from 4.75V~6V is recommended. 2. Operating temperature range between 0~+50 is strongly recommended, Ta=25 is typical. UNIT V V ELECTRICAL CHARACTERISTICS DC CHARACTERISTICS (Ta=0 ~ 70, VDD=5.0 0.25V) SYMBOL VIH Input Voltage Level VIL Input Leakage Current IIN(LEAK) Input Capacitance CIN Power Consumption W Clock Frequency fc Note: Applicable to BCK, WS & DATA. High Low PARAMETER TEST CONDITIONS Note Note Note Note VDD=5.0V MIN 0.66VDD TYP MAX 0.30VDD 0.1 5 30 5.6448 18.4 UNIT V A pF mW MHz ANALOG CHARACTERISTICS (Ta=25, VDD=5.0V) PARAMETER SYMBOL TEST CONDITIONS MIN Maximum Output Amplitude VOUT Total Harmonic Distortion (Note 1) THD 1KHz, 0dB Dynamic Range DR Signal-to-Noise Ratio (Note 2) S/N 1KHz, 0dB Cross Talk (Note 2) CT 1KHz, 0dB Note 1. Measured with 176.4KHz sampling rate, 2K~ 20K Harmonics 2. Measured with an A/D & D/A Evaluation Board at sampling rate of 48KHz. TYP 2.5 0.13 16 82 -85 MAX UNIT Vpp % bit dB dB TIMING CHARACTERISTICS (refer to Figure 1) PARAMETER High Level Time Rise Time Fall Time SYMBOL tH tR tF MIN 25 TYP MAX 20 20 UNIT ns ns ns UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 QW-R502-043,A UA2311 FUNCTIONAL DESCRIPTION CMOS IC The UTC UA2311 accepts serial input data format of 16-bits word length. Both left and right data words are time multiplexed. The last 16 bits word before "WS" changes is recognized as the input data. The timing and input signal formats are shown in Figure 1 and 2. The most significant bit (bit 1) must always be first. The serial input data is shifted and latched for the Right and Left Channels. With a HIGH level on the word select input (WS), data is placed in the left input register and with a LOW level on the WS input, data is placed in the right input register(see Block Diagram). The data in the input registers are simultaneously latched in the output registers which control the bit switches. The 16 bits Right/Left Data is then converted to floating point expression whose format consists of 10 bits mantissa and 7 step exponent. This floating point expression is then converted to analog output voltage by the resistor-string. This signal is driven to the Right/Left Channel (VOR/VOL) by the buffer operational amplifier. RIGHT WS tR tH tF LEFT BCK DIN LSB+ 1 LSB MSB MSB-1 Figure.1 Input Signal Format LSB Data MSB MSB LSB BCK LEFT WS Sample Out RIGHT Figure.2 Timing and Input Signal Formats UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 QW-R502-043,A UA2311 APPLICATION CIRCUIT CMOS IC A typical example of CD-ROM application is showed as below. It features typical decoupling components and a second-order analog post-filter stage providing a line output. 1000pF + Right Channel Audio Output 7.5K BCK WS DATA GND VOR NC VOL VDD 1000pF 7.5K 10 47F 100nF 7.5K 470pF UTC UA2311 VDD + 7.5K 470pF Left Channel Audio Output UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 QW-R502-043,A |
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