Datasheet

UNISONIC TECHNOLOGIES CO.,LTD
UA2311
CMOS IC
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

ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
UA2311L-D08-T
UA2311G-D08-T
UA2311G-S08-R
UA2311L-D08-T

Package
Packing
DIP-8
SOP-8
Tube
Tape Reel
(1)Packing Type
(1) T: Tube, R: Tape Reel
(2)Package Type
(2) D08: DIP-8, S08: SOP-8
(3)Green Package
(3) L: Lead Free, G: Halogen Free and Lead Free
MARKING
DIP-8
8
7
6
5
UTC
UA2311
1
2
3
4
SOP-8
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
BCK
1
8
VOR
WS
2
7
NC
DATA
3
6
VOL
GND
4
5
VDD
PIN CONFIGURATION
PIN NO.
1
2
3
4
5
6
7
8

CMOS IC
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
BLOCK DIAGRAM
Floating
Conversion
DAC
out
+
op
-
8
VOR
7
NC
6
VOL
5
VDD
VCC
BCK
1
WS
2
DATA
3
GND
out
+
op
-
Data Latch
Floating
Conversion
4
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
out
+
op
DAC
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UA2311

CMOS IC
ABSOLUTE MAXIMUM RATING
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
Notes: 1. The typical power supply voltage propose at 5V, and range from 4.75V~6V is recommended.
2. Operating temperature range between 0~+50C is strongly recommended, TA=25 is typical.

UNIT
V
V
C
C
ELECTRICAL CHARACTERISTICS
DC CHARACTERISTICS (TA=0 ~ 70C, VDD=5.0 ± 0.25V, unless otherwise specified)
PARAMETER
Input Voltage Level
High
Low
Input Leakage Current
Input Capacitance
Power Consumption
Clock Frequency
Note: Applicable to BCK, WS & DATA.
SYMBOL
VIH
VIL
IIN(LEAK)
CIN
W
fc
TEST CONDITIONS
Note
Note
Note
Note
VDD=5.0V
MIN
0.66VDD
TYP
MAX
UNIT
0.30VDD
0.1
5
30
5.6448
18.4
V
μA
pF
mW
MHz
ANALOG CHARACTERISTICS (TA=25C, VDD=5.0V, unless otherwise specified)
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
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
Vpp
%
bit
dB
dB
TYP
MAX
UNIT
ns
ns
ns
TIMING CHARACTERISTICS (refer to Figure 1)
PARAMETER
High Level Time
Rise Time
Fall Time
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
SYMBOL
tH
tR
tF
MIN
25
20
20
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UA2311

CMOS IC
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 (VOR/VOL) by the buffer operational amplifier.
RIGHT
LEFT
WS
tR tH
tF
BCK
DIN
LSB+ 1
LSB
MSB
MSB-1
Figure.1 Input Signal Format
LSB
Data
MSB
LSB
MSB
BCK
LEFT
RIGHT
WS
Sample Out
Figure.2 Timing and Input Signal Formats
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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UA2311
CMOS IC
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.
-
1000pF
+
7.5K
BCK
VOR
WS
NC
DATA
VOL
GND
Right Channel
Audio Output
7.5K
470pF
VDD
UTC UA2311
-
1000pF
VDD
+
7.5K
10
Left Channel
Audio Output
7.5K
470pF
47μF
100nF
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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