[AK4203]
AK4203
Stereo Cap-less LINE-Amp and Video-Amp
GENERAL DESCRIPTION
The AK4203 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 AK4203 achieves 2Vrms outputs
with excellent linearity 2Vrms output by single 3.3V power supply. The AK4203 is available in small 16-pin
TSSOP, saving the system space and cost.
FEATURE
Audio Line-Amp
Differential 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
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: 16TSSOP
MS1376-E-00
-1-
2012/02
[AK4203]
■
Block Diagram
LIN+
LIN-
+
LOUT
-
VDD1
VDD2
VSS1
CVEE
CP
CN
VSS2
ROUT
Charge
Pump
RIN+
RIN-
+
-
VMUTE
VIN
Clamp
LPF
+
VOUT
-
Figure 1. AK4203 Block Diagram
MS1376-E-00
-2-
2012/02
[AK4203]
■
Ordering Guide
AK4203ET
AKD4203
−20 ∼
+85°C
16pin TSSOP (0.65mm pitch)
Evaluation board for AK4203
■
Pin Layout
VIN
VPDN
CN
CP
LINN
LINP
RINP
RINN
1
2
3
4
5
6
7
8
16
15
14
VDD2
VSS2
VOUT
VEE
VSS1
VDD1
LOUT
ROUT
AK4203
Top
View
13
12
11
10
9
MS1376-E-00
-3-
2012/02
[AK4203]
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
LINN
LINP
RINP
RINN
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 Mute pin
Negative Charge Pump Capacitor Terminal pin
Positive Charge Pump Capacitor Terminal pin
Lch Audio Negative Input pin
Lch Audio Positive Input pin
Rch Audio Positive Input pin
Rch Audio Negative Input pin
Audio Output pin (R channel)
Audio Output pin (L channel)
Power Supply 1 pin, 3.0V∼3.6V
Connect to VSS1 with a 0.1μF ceramic capacitor in parallel with a 10μF 3.3V
electrolytic capacitor.
Ground 1 pin
Negative Voltage Output pin
Connect to VSS1 with a 10μF 3.3V electrolytic capacitor.
Video Signal Output pin
Ground 2 pin
Power Supply 2 pin, 3.0V∼3.6V
Connect to VSS2 with a 0.1μF ceramic capacitor in parallel with a 10μF 3.3V
electrolytic capacitor.
■
Handling of Unused Pin
The unused I/O pins must be processed appropriately as below.
Classification
Digital Input
Audio Input
Audio, Video Output
Pin Name
VPDN
LINP/N, RINP/N
AOUT, VOUT
Setting
VSS1
VSS1
Open
MS1376-E-00
-4-
2012/02
[AK4203]
ABSOLUTE MAXIMUM RATINGS
(VSS1=VSS2 =0V (Note
1))
Parameter
Power Supply
Symbol
VDD1
VDD2
IIN
VINA
VINV
Ta
Tstg
min
-0.3
max
4.0
Unit
V
mA
V
V
°C
°C
Input Current (any pins except for supplies)
-
±10
Audio Input Voltage
(Note
4)
VEE -0.3
VDD1 +0.3
Video Input Voltage
-0.3
VDD2 +0.3
Ambient Operating Temperature
-20
85
Storage Temperature
-65
150
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 be the same voltage.
Note 4. VEE: The VEE pin voltage
VEE is generated by the internal charge pump circuit. VEE voltage is “-VDD1 +0.2V” (typ).
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 be 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
5)
Note 5. No input and no load.
typ
18
max
30
Unit
mA
MS1376-E-00
-5-
2012/02
京公网安备 11010802033920号
EEWORLD
