參數(shù)資料
型號(hào)： TMC2192KHC
廠商： FAIRCHILD SEMICONDUCTOR CORP
元件分類： 顏色信號(hào)轉(zhuǎn)換
英文描述： 10 Bit Encoder
中文描述： COLOR SIGNAL ENCODER, PQFP100
封裝： MQFP-100
文件頁數(shù)： 63/69頁
文件大?。?/td> 457K
代理商： TMC2192KHC
PRODUCT SPECIFICATION
TMC2192
REV. 1.0.0 8/13/03
63
System Performance Characteristics
Notes:
1. TTL input levels are 0.0 and 3.0 Volts, 10%-90% rise and fall times <3 ns.
2. Analog CLOAD <10 pF, D7-0 load <40 pF.
Parameter
RES
E
LI
E
LD
Conditions
Min.
10
Typ.
10
Max.
10
0.25
0.10
Units
Bits
%
%
D/A Converter Resolution
Integral Linearity Error
Differential Linearity Error
(monotonic)
Gain Error
Differential Phase
Differential Gain
CHROMA to LUMA Output
Skew
Power Supply Rejection
Ratio
E
G
dp
dg
SKEW
±
7.5
%FS
degree
%
ns
PXCK = 27.00 MHz,40 IRE Ramp
PXCK = 27.00 MHz,40 IRE Ramp
0.5
0.9
0
1
PSRR
f=1kHz
0.5
%/%V
DD
Applications Discussion
The suggested output reconstruction filter is shown in Figure
29. The phase and frequency response for the encoder and
the reconstruction filter is shown in Figure 30.
Figure 28. Typical Analog Reconstruction Filter
Figure 29. Overall Response
The circuit in Figure 31 shows the connection of power sup-
ply voltages, output reconstruction filters and the external
voltage reference. All V
DD
pins should be connected to the
same power source.
The full-scale output voltage level for each D/A:
V
OUTx
= I
OUTx
x R
Lx
= K x I
REFx
x R
Lx
= K x (V
REF
/R
REFx
) x R
Lx
where:
I
OUTx
is the full-scale output current sourced by the D/A
converter.
R
Lx
is the resistive load on the D/A output pin.
K is a constant for the TMC2192 D/A converters (approx-
imately equal to 34).
I
REFx
is the reference current flowing out of the R
REFx
pin to ground.
V
REF
is the voltage measured on the V
REF
pin.
R
REFx
is the total resistance connected between the
R
REFx
pin and ground.
The reference voltage in Figure 31 is from an LM185 1.2
Volt band-gap reference. The suggested trim is designed to
give
±
10% of trim around 5K Ohms. This R
REFx
sets the
"gain" for that D/A converter. Varying R
REFx
±
10% will
cause the full-scale output voltage on the D/A to vary by
±
10%.
An alternative output reconstruction filter is the Microelec-
tronic Modules Corp. ST-163E, which contains 4 indepen-
dent reconstruction filter. The phase and frequency response
of this filter is shown in the Output Low-Pass Filters Section
of this data sheet.
A_IN
A_OUT
R8
75
C7
330pF
C7
330pF
C6
27pF
C8
100pF
R9
75
L6
1.0
μ
H
65-6294-31
D1
DIODE
SCHOTTKY
L5 1.8
μ
H
D2
DIODE
SCHOTTKY
65-6294-32
A
Frequency (MHz)
0
-10
-20
-30
-40
0
5
10
15
20
25
0
90
180
270
360
P
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