[AK4204]
=Preliminary =
AK4204
Stereo Cap-less LINE-Amp and Video-Amp
GENERAL DESCRIPTION
The AK4204 is an audio stereo cap-less line driver with 1-channel video driver. It eliminates the need for
large DC-blocking capacitors with a built-in Charge-pump circuit. The AK4204 achieves 2Vrms outputs
with excellent linearity by single 3.3V power supply. It is well suitable for Blu-ray player and set-top box
systems. The AK4204 is available in small 16-pin TSSOP, saving the system space and cost.
FEATURE
1. Audio Line-Amp
Single-ended Input
Stereo Cap-less Amplifier (No DC-blocking capacitors required)
Line-Out level: 2.0Vrms
THD+N: -90dB
S/N: 102dB
Output gain: 6dB
Low-pass Filter: fc= 130kHz
Pop Noise Free Ground-referenced Output
Audio Mute Function
2. Video Amp
1ch Stereo Cap-less Amplifier (No DC-blocking capacitors required)
Integrated Video Amplifier (+6dB)
Input Level: 1.5Vpp (max)
SN: 75dB(typ), Bandwidth: 100kHz
∼
6MHz
LPF: -0.5dB@ 6.75MHz (typ), -43dB@27MHz (typ)
Video Mute Function
Power Supply: 3.0V ~ 3.6V
Ta:
−20 ∼
85°C
Package: 16pinTSSOP
Rev. 0.1
-1-
2012/02
[AK4204]
■
Block Diagram
R1
SGND
R2
-
LOUT
+
R1
R2
R3
SGND
VDD1
VSS1
VDD2
VSS2
VEE
CP
CN
LINP
Charge
Pump
R1
RINP
R2
+
ROUT
R1
SGND
R2
R3
-
VIN
Clamp
LPF
+
VOUT
VPDN
APDN
-
Figure 1. AK4204 Block Diagram
Rev. 0.1
-2-
2012/02
[AK4204]
■
Ordering Guide
AK4204ET
AKD4204
−20 ∼
+85°C
16 pin TSSOP (0.65mm pitch)
Evaluation board for AK4204
■
Pin Layout
VIN
VPDN
CN
CP
APDN
LINP
RINP
SGND
1
2
3
4
5
6
7
8
16
15
14
VDD2
VSS2
VOUT
VEE
VSS1
VDD1
LOUT
ROUT
AK4204
Top
View
13
12
11
10
9
Rev. 0.1
-3-
2012/02
[AK4204]
PIN/FUNCTION
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Pin Name
VIN
VPDN
CN
CP
APDN
LINP
RINP
SGND
ROUT
LOUT
VDD1
VSS1
VEE
VOUT
VSS2
VDD2
I/O
I
I
I
O
I
I
I
I
O
O
-
-
O
O
-
-
Function
Video Signal Input pin
Video Block Power Down pin
Negative Charge Pump Capacitor Terminal pin
Positive Charge Pump Capacitor Terminal pin
Audio Block Power Down pin
Lch Audio Positive Input pin
Rch Audio Positive Input pin
Reference Voltage Input pin for Audio Signal (0V)
Audio Output pin (R channel)
Audio Output pin (L channel)
Power Supply 1 pin; 3.0V∼3.6V
Connect a 0.1μF ceramic capacitor in parallel with a 10μF 3.3V electrolytic
capacitor between this pin and VSS1.
Ground 1 pin
Negative Voltage Output pin
Connect to VSS1 via a 10μF 3.3V electrolytic capacitor.
Video Signal Output pin
Ground 2 pin
Power Supply 2 pin; 3.0V∼3.6V
Connect a 0.1μF ceramic capacitor in parallel with a 10μF 3.3V electrolytic
capacitor between this pin and VSS2.
Rev. 0.1
-4-
2012/02
[AK4204]
ABSOLUTE MAXIMUM RATINGS
(VSS1=VSS2 = 0V;
Note 1, Note 2)
Parameter
Power Supply
Symbol
VDD1
VDD2
IIN
VINA
VINV
Ta
Tstg
min
-0.3
-
VEE-0.3
-0.3
-20
-65
max
4.0
±10
VDD1 +0.3
VDD2+0.3
85
150
Unit
V
mA
V
V
°C
°C
Input Current (any pins except for supplies)
Audio Input Voltage
Video Input Voltage
Ambient Operating Temperature
Storage Temperature
Note 1. All voltages are respect to ground.
Note 2. VSS1 and VSS2 must be connected to the same analog plane.
Note 3. VDD1 and VDD2 must have the same voltage.
WARNING: Operation at or beyond these limits may result in permanent damage to the device.
Normal operation is not guaranteed at these extremes.
RECOMMEND OPERATING CONDITIONS
(VSS1 = VSS2 = 0V)
Parameter
Power Supply
Symbol
VDD1
VDD2
Note 3. VDD1 and VDD2 must have the same voltage.
min
3.0
3.0
typ
3.3
3.3
max
3.6
3.6
Unit
V
V
Note: AKM assumes no responsibility for the usage beyond the conditions in this datasheet.
ELECTICAL CHARACTERISTICS
(Ta=25°C; VDD1= VDD2 = 3.3V; VSS1= VSS2 = 0V)
Power Supplies
Parameter
min
Power Supply (VDD1+VDD2)
Normal Operation (Note
4)
Note 4. No input and no load.
typ
18
max
TBD
Unit
mA
Rev. 0.1
-5-
2012/02
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