UTC U2429
CMOS IC
SERIAL DATA CONTROL DUAL
ELECTRONIC VOLUME
DESCRIPTION
The UTC U2429 is a dual channel electronic volume
controlled with 2-wire serial data.
The built-in reference circuit can compose of an
electronic volume with less external parts.
SOP-8
FEATURES
* Built-in reference circuit
* Control with serial data
Volume 0 ~ -83dB (1dB/step), -∞
(Independent control is allowed in each channel)
* Low noise and low distortion
VNO = 5µVrms (ATT = -∞)
THD = 0.01% Typ. (V0 = 0.5Vrms)
DIP-8
PIN CONFIGURATION
VIN1
1
8
VIN2
VOUT1
2
7
VOUT2
GND
3
6
VCC
DATA
4
5
CLOCK
PIN DESCRIPTION
PIN No.
1
2
3
4
5
6
7
8
UTC
PIN NAME
VIN 1
VOUT1
GND
DATA
CLOCK
VCC
VOUT2
VIN2
FUNCTION
1-ch input pin
1-ch output pin
Ground pin
Control data input pin. Inputs data in synchronization with clock.
Clock input pin for transferring serial data.
Power supply pin. Stabilize the pin with decoupling capacitor.
2-ch output pin
1-ch input pin
UNISONIC TECHNOLOGIES CO., LTD.
1
QW-R502-031,A
UTC U2429
CMOS IC
BLOCK DIAGRAM
VIN2
VOUT2
VCC
CLOCK
8
7
6
5
Vref
LOGIC
CONTROL
+
VR 2
VOL AMP 2
+
VOL AMP 1
REF AMP
VR 1
+
1
2
3
4
VIN1
VOUT1
GND
DATA
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Supply Voltage
Power Dissipation
DIP-8
SOP-8
Operating Temperature
Storage Temperature
SYMBOL
VCC, VDD
RATINGS
UNIT
6.0
V
PD
625
440
-20 ~ +75
-55 ~ +125
mW
Topr
Tstg
℃
℃
RECOMMENDED OPERATING CONDITIONS
PARAMETER
Supply voltage range
Rated supply voltage
SYMBOL
Vcc
Vcc
UNIT
V
V
RATINGS
4.5 ~ 5.5
5
ELECTRICAL CHARACTERISTICS (VCC = 5V, Ta= 25℃, unless otherwise noted.)
PARAMETER
Circuit current
Maximum attenuation
Attenuation error
Maximum input voltage
Maximum output voltage
Output noise voltage
10
10
0.05
-70
UNIT
mA
dB
dB
Vrms
Vrms
μVrms
μVrms
%
dB
UNISONIC TECHNOLOGIES CO., LTD.
2
Total harmonic distortion
Channel separation
UTC
SYMBOL
ICC
ATT
ATT
VIM
VOM
VNO1
VNO2
THD
CS
TEST CONDITIONS
ATT=-∞
ATT=0
THD=1%, ATT=-6dB
THD=1%
ATT=0, Rg=0
ATT=-∞, Rg=0
f=1kHz, VO=0.5Vrms, ATT=0
f=1kHz
MIN
-2.0
1.5
0.8
TYP
MAX
8
-90
0
1.7
1.3
4
5
0.01
-80
16
-80
2.0
QW-R502-031,A
UTC U2429
CMOS IC
DC CHARACTERISTICS OF DIGITAL BLOCK
PARAMETER
"L" level input voltage
"H" level input voltage
"L" level input current
"H" level input current
SYMBOL
TEST CONDITIONS
VIL
Data, clock pin
VIH
VI=0
Data, clock pin
IIL
VI=5V
IIH
MIN
TYP
MAX
UNIT
0
0.8VCC
-10
~
~
0.2VCC
VCC
V
V
10
10
μA
μA
MIN
TYP
MAX
UNIT
μs
μs
μs
μs
μs
μs
μs
AC CHARACTERISTICS OF DIGITAL BLOCK
PARAMETER
Cycle time of clock
Pulse width of clock ("H" level)
Pulse width of clock ("L" level)
Clock rising time
Clock falling time
Data setup time
Data hold time
SYMBOL
tcr
tWHC
tWLC
tr
tf
tSD
tHD
TEST CONDITIONS
VDD=5V
VDD=5V
VDD=5V
VDD=5V
VDD=5V
VDD=5V
VDD=5V
4
1.6
1.6
0.4
0.4
0.8
0.8
RELATIONSHIP BETWEEN DATA AND CLOCK
CLOCK
DATA
D0
D1
D2
D3
Reads data signal at the rising edge of clock signal
D8
D9
D10
Latch signal "H"
Reads latch signal at the falling edge of clock
UTC
UNISONIC TECHNOLOGIES CO., LTD.
3
QW-R502-031,A
UTC U2429
CMOS IC
SYSTEM CONFIGURATION
UTC U2429
2ch OUT
2ch IN
VOLUME
1ch IN
1ch OUT
VOLUME
LOGIC
CONTROL
DATA
CLOCK
CLOCK AND DATA TIMING
tcr
75%
CLOCK
25%
tr
tf
tWHC
tWLC
DATA
tSD
UTC
tHD
UNISONIC TECHNOLOGIES CO., LTD.
4
QW-R502-031,A
UTC U2429
CMOS IC
DATA INPUT FORMAT
D0
D1
0/1
0/1
D2
D3
D4
D5
D6
D7
D8
VOLUME
D9
D10
1
1
0: Both channels at a time
1: A channel at a time
0:1CH
1:2CH
VOLUME CODE
ATT1
0dB
-4dB
-8dB
-12dB
-16dB
-20dB
-24dB
-28dB
-32dB
-36dB
-40dB
-44dB
-48dB
-52dB
-56dB
-60dB
-64dB
-68dB
-72dB
-76dB
-80dB
D2
H
L
H
L
H
L
H
L
H
L
H
L
H
L
H
L
H
L
H
L
H
L
D3
L
L
H
H
L
L
H
H
L
L
H
H
L
L
H
H
L
L
H
H
L
L
D4
H
H
L
L
L
L
H
H
H
H
L
L
L
L
H
H
H
H
L
L
L
L
D5
L
L
L
L
L
L
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
D6
H
H
H
H
H
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
ATT2
0dB
-1dB
-2dB
-3dB
D7
H
L
H
L
D8
H
H
L
L
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.
UTC
UNISONIC TECHNOLOGIES CO., LTD.
5
QW-R502-031,A