AK8817_06 Datasheet, PDF (7/44 Pages) Asahi Kasei Microsystems – NTSC/PAL Digital Video Encoder

ASAHI KASEI
[AK8817]
(4) Analog Characteristics
< AVDD = 3.0 V, temperature 25 °C >
Parameter
Symbol
Min
Typ
Max
Units
DAC resolution
9
bit
DAC integral non-linearity ( error )
+/- 0.6
+/- 2.0
LSB
DAC differential non-linearity ( error )
+/- 0.4
+/- 1.0
LSB
DAC output full scale voltage
1.18
1.28
1.38
V
Note1)
DAC output offset voltage
5.0
mV
Note2)
Video Amp Output Gain
5.0
6.0
7.0
dB
Amp Input Level 1Vpp
Video Amp Full scale Level
Video Amp THD
Video Amp S/N
2.0
-45
-51
54
Vpp
Note3)
dB
100kHz - 5.5MHz Note4)
dB
100kHz - 5.5MHz Note4)
LPF Ripple
-1
+/- 0.5
+1
dB
100kHz - 5.5MHz
0dB = 100kHz input
LPF Stop Band Level
20
30
27MHz
dB
0dB = 100kHz input
LPF Group Delay
10
100
ns
|GD3MHz - GD6MHz|
On-chip reference voltage (VREF)
1.17
1.23
1.30
V
Reference voltage drift
-50
ppm/°C
Note1) Values are when a 390 ohm output load, a 12k ohm IREF pin resistor and on-chip VREF are used.
Full scale output current is calculated as Iout = full scale output voltage ( typ. 1.28 V ) / 390 ohm = typ. 3.28 mA.
Note2) A voltage referenced to VSS when a decimal zero voltage is input to DAC.
Note3) VOUT Output Level Output Load Resistor: 150ohm, Load Capacitor: 15pF Internal Color Bar output
Note4) Output signal from DAC to which Input data corresponded 1Vpp. This signal is input to AMP.
Load resistor is 150ohm and Load capacitor is 15pF as shown bellow figure at (5) Current Consumption.
(5) Current consumption
Parameter
< Operating voltage : DVDD = AVDD = PVDD = 3.0 V, Ta = +25 °C >
Symbol
Min
Typ
Max
Units
Total power consumption
27
35
mA
Note1)
Power-down current 1
10
30
uA
Note2)
Digital part operating current 1
13
mA
Note3)
Analog part operating current 1
14
mA
Note4)
Analog part operating current 2
5.5
mA
Note5)
Analog part operating current 3
0.8
mA
Note6)
Note1) operation at 27 MHz, NTSC mode on-chip 75% color bar output is enabled and Video Amp output is “ on “ ( no
external output loads are connected except for recommended components. ). 15pF capacitors in following figure represent
PCB layout-capacitor.
AK8817
SAG
VOUT
1uF
47uF
75ohm
75ohm
AK8817
SAG
VOUT
100uF _75ohm
75ohm
15pF
15pF
15pF
15pF
SAG Compensation ON
SAG Compensation OFF
Note2) measuring conditions :
input / output settings after power-down sequence are, PDN pin is at GND level, CLKOUT and SDO output are at high
level ( power supply voltage ) with no external connection, input voltage on those input pins is 1/2 level of power supply
which are set to accept Hi-Z input at power-down, and TEST = ATPG = GND ( or left open ).
Power supplies are AVDD = DVSS = PVDD.
Each ground pin ( DVSS, AVSS, PVSS ) is always 0 V ( voltage reference ).
Note3) Operation at 27 MHz, NTSC mode on-chip 75% color bar output is enabled.
Note4) DAC ON, Video Amp On SAG Compensation On
Note5) DAC ON, Video Amp Off (SAG Compensation Off)
Note6) DAC Off, Video Amp Off (SAG Compensation Off)
MS0413-E-03
7
2006 / 05