UA2311L-D08-T中文资料
UNISONIC TECHNOLOGIES CO.,LTD
UA2311 C M O S
I C
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.
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 PIN NAME DESCRIPTION 1 BCK Bit Clock Input 2 WS Word Select Input 3 DATA Data Input 4 GND Ground 5 V DD Positive Power Supply 6 V OL Left Channel Output 7 NC Not Connected 8 V OR Right Channel Output
ORDERING INFORMATION
Ordering Number
Normal Lead Free Plating
Package Packing
UA2311-S08-R UA2311L-S08-R SOP-8 Tape Reel UA2311-S08-T UA2311L-S08-T SOP-8 Tube UA2311-D08-T UA2311L-D08-T DIP-8 Tube
PIN CONFIGURATION
V OR NC V OL V DD
GND
DATA WS BCK
BLOCK DIAGRAM
GND
WS
DATA
BCK V DD
V OL
NC
V OR
ABSOLUTE MAXIMUM RATING
UNIT
PARAMETER SYMBOL RATINGS Power Supply Voltage V DD-3.0 ~ +7.0 V
Input Voltage V IN-0.3 ~ V DD+0.3 V
Operating Temperature T OPR0 ~ +70 ℃
Storage Temperature T STG-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.
ELECTRICAL CHARACTERISTICS
DC CHARACTERISTICS(Ta=0 ~ 70℃, V DD=5.0 ± 0.25V)
TYP
MAX
UNIT
MIN
CONDITIONS
PARAMETER SYMBOL TEST
High V IH Note 0.66V DD
V Input Voltage Level
Low V IL Note 0.30V DD Input Leakage Current I IN(LEAK) Note 0.1 μA
Input Capacitance C IN Note 5 pF
mW
30
Power Consumption W V DD=5.0V
Clock Frequency fc 5.6448 18.4 MHz
Note: Applicable to BCK, WS & DATA.
ANALOG CHARACTERISTICS(Ta=25℃, V DD=5.0V)
MAX
TYP
UNIT
PARAMETER SYMBOL TEST
CONDITIONS
MIN
Maximum Output Amplitude V OUT 2.5 V pp
Total Harmonic Distortion (Note 1) THD 1KHz, 0dB 0.13 %
Dynamic Range DR 16 bit
0dB 82 dB Signal-to-Noise Ratio (Note 2) S/N
1KHz,
Cross Talk (Note 2) CT 1KHz, 0dB -85 dB
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.
TIMING CHARACTERISTICS (refer to Figure 1)
TYP
UNIT
MAX
MIN
PARAMETER SYMBOL
High Level Time t H 25 ns
ns Rise Time t R20
ns Fall Time t F20
FUNCTIONAL DESCRIPTION
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 (V OR /V OL ) by the buffer operational amplifier.
WS
BCK
DIN Figure.1 Input Signal Format
LSB
WS
BCK
Data
Sample Out
Figure.2 Timing and Input Signal Formats
APPLICATION CIRCUIT
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.
V DD
Right Channel Audio Output