
PRODUCT SPECIFICATION
TMC2192
63
P
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