UNISONIC TECHNOLOGIES CO.,LTD
UA2311
16 BITS DIGITAL to ANALOG
CONVERTER
DESCRIPTION
CMOS IC
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
ORDERING INFORMATION
Ordering Number
Lead Free
UA2311L-D08-T
-
Halogen Free
UA2311G-D08-T
UA2311G-S08-R
Package
DIP-8
SOP-8
Packing
Tube
Tape Reel
UA2311L-D08-T
(1)Packing Type
(2)Package Type
(3)Green Package
(1) T: Tube, R: Tape Reel
(2) D08: DIP-8, S08: SOP-8
(3) L: Lead Free, G: Halogen Free and Lead Free
MARKING
DIP-8
8
7
6
5
SOP-8
UTC
UA2311
1
2
3
4
Date Code
L: Lead Free
G: Halogen Free
Lot Code
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co.,Ltd
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QW-R502-043.B
UA2311
PIN CONFIGURATION
CMOS IC
BCK
WS
DATA
GND
1
2
3
4
8
7
6
5
V
OR
NC
V
OL
V
DD
PIN CONFIGURATION
PIN NO.
1
2
3
4
5
6
7
8
PIN NAME
BCK
WS
DATA
GND
V
DD
V
OL
NC
V
OR
DESCRIPTION
Bit Clock Input
Word Select Input
Data Input
Ground
Positive Power Supply
Left Channel Output
Not Connected
Right Channel Output
BLOCK DIAGRAM
Floating
Conversion
V
CC
BCK
WS
1
Data Latch
DAC
out
+
op
-
8
V
OR
2
3
out
+
op
-
7
NC
DATA
GND
4
Floating
Conversion
out
+
op
-
DAC
6
V
OL
5
V
DD
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R502-043.B
UA2311
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
RATINGS
Power Supply Voltage
V
DD
-3.0 ~ +7.0
Input Voltage
V
IN
-0.3 ~ V
DD
+0.3
Operating Temperature
T
OPR
0 ~ +70
Storage Temperature
T
STG
-40 ~ +150
Notes: 1. The typical power supply voltage propose at 5V, and range from 4.75V~6V is recommended.
2. Operating temperature range between 0~+50C is strongly recommended, T
A
=25 is typical.
CMOS IC
UNIT
V
V
C
C
ELECTRICAL CHARACTERISTICS
DC CHARACTERISTICS
(T
A
=0 ~ 70C, V
DD
=5.0 ± 0.25V, unless otherwise specified)
PARAMETER
Input Voltage Level
High
Low
SYMBOL
V
IH
V
IL
I
IN(LEAK)
C
IN
W
fc
TEST CONDITIONS
Note
Note
Note
Note
V
DD
=5.0V
MIN
0.66V
DD
TYP
MAX
0.30V
DD
0.1
5
30
5.6448
18.4
UNIT
V
μA
pF
mW
MHz
Input Leakage Current
Input Capacitance
Power Consumption
Clock Frequency
Note: Applicable to BCK, WS & DATA.
ANALOG CHARACTERISTICS
(T
A
=25C, V
DD
=5.0V, unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
Maximum Output Amplitude
V
OUT
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
Notes: 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
V
pp
%
bit
dB
dB
TIMING CHARACTERISTICS
(refer to Figure 1)
PARAMETER
High Level Time
Rise Time
Fall Time
SYMBOL
t
H
t
R
t
F
MIN
25
TYP
MAX
20
20
UNIT
ns
ns
ns
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
3 of 5
QW-R502-043.B
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 (V
OR
/V
OL
) by the buffer operational amplifier.
RIGHT
WS
t
R
t
H
t
F
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
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QW-R502-043.B
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
7.5K
BCK
WS
DATA
GND
V
OR
NC
V
OL
V
DD
1000pF
7.5K
10
47μF
100nF
7.5K
-
+
7.5K
-
+
470pF
Right Channel
Audio Output
UTC UA2311
V
DD
Left Channel
Audio Output
470pF
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
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QW-R502-043.B
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