HT82V737
16-Bit Stereo Audio D/A Converter with Earphone Driver
Block Diagram
Rev. 1.00
1
November 26, 2003
Features
Wide supply voltage range: 2.4V~5.5V
Low power consumption
16-bit dynamic range
Low total harmonic distortion
Stereo audio outputs
Data in 2
s complement format, TTL
Minimum number of external components is required
Low clock jitter sensitivity
Built-in highly efficient earphone driver
16-pin NSOP package
Applications
MP3 player
CD/VCD ROM and player
Satellite/cable STB
Digital portable audio/video equipment
General Description
HT82V737 is a low power consumption stereo DAC with
an integrated earphone driver. The device utilizes
CMOS technology specially for portable MP3 players,
VCD and CD machines.
It converts the 16 bits serial data into an analog output
voltage by high precision D/A converter. It can be used
with the Japanese input format: time multiplexed, two
s
complement, MSB first TTL level serial input. With its ex-
cellent frequency response characteristics, the
HT82V737 provides users a low cost means of imple-
menting high quality audio voltage outputs. It also builds
in a class AB stereo driver and some application circuits,
thus, requires minimal external components.
The HT82V737 can support low voltage operation at
2.4V so it is very suitable for portable battery powered
audio device. A low supply in power down mode current
reduces power consumption. It is available in small
16-pin NSOP package.
D a t a L a t c h
D A C
O u t
o p
B C K
W S
D I N
D V D D
R C H
L C H
S e r i a l - t o - p a r a l l e l
C o n v e r s i o n
+
V
D D
o p
+
D A C
o p
+
O u t
O u t
D V S S
S e r i a l - t o - p a r a l l e l
C o n v e r s i o n
o p
+
P D
o p
+
2 0 k W
3 0 k W
2 0 k W
3 0 k W
A
V
S
S
R
I
N
R
O
U
T
L
I
N
L
O
U
T
A
V
D
D
B
I
A
S
Pin Assignment
Pin Description
Pin No.
Pin Name
I/O
Description
1
WS
I
Word select input
2
DIN
I
Data input
3
DVDD
Digital positive power supply
4
BIAS
Connect a capacitor to ground to increase half-supply stability
5
LCH
O
Left DAC analog output
6
LIN
I
Left inverting output
7
LOUT
O
Left earphone driver analog output
8
AVSS
Analog negative power supply, ground
9
AVDD
Analog positive power supply
10
ROUT
O
Right earphone driver analog output
11
RIN
I
Right inverting input
12
RCH
O
Right DAC analog output
13
NC
No connection
14
DVSS
Digital negative power supply, ground
15
PD
I
When low, the HT82V737 is powered down
16
BCK
I
Bit serial clock input
Absolute Maximum Ratings
Supply Voltage ..........................V
SS
-0.3V to V
SS
+5.5V
Storage Temperature ...........................
-50C to 125C
Input Voltage .............................V
SS
-0.3V to V
DD
+0.3V
Operating Temperature ..........................
-20C to 70C
Note: These are stress ratings only. Stresses exceeding the range specified under
Absolute Maximum Ratings may
cause substantial damage to the device. Functional operation of this device at other conditions beyond those
listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliabil-
ity.
HT82V737
Rev. 1.00
2
November 26, 2003
W S
D I N
D V D D
B I A S
L C H
L I N
L O U T
A V S S
B C K
P D
D V S S
N C
R C H
R I N
R O U T
A V D D
H T 8 2 V 7 3 7
1 6 N S O P - A
1 6
1 5
1 4
1 3
1 2
1 1
1 0
9
1
2
3
4
5
6
7
8
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