THS8133 Datasheet, PDF (9/23 Pages) Texas Instruments – TRIPLE 10-BIT, 80 MSPS VIDEO D/A CONVERTER WITH TRI-LEVEL SYNC GENERATION

THS8133, THS8133A, THS8133B
TRIPLE 10-BIT, 80 MSPS VIDEO D/A CONVERTER
WITH TRI-LEVEL SYNC GENERATION
SLVS204C – APRIL 1999 – REVISED SEPTEMBER 2000
output amplitude control (continued)
The exact relationship between R_FS and the current drive level on each channel is dependent on the operation
mode of the device (see Table 4). In GBR mode, the output drive is identical on the three channels, while in
YPbPr mode, a level shift is implemented on Pb and Pr channels. Refer to the application information section
for details on the current drive levels in each mode.
The device has an internal voltage reference derived from a bandgap reference of 1.35 V. The relationship
between the full-scale current drive level and R_FS is given by:
I_FS [A] = α x V_REF [V] ÷ R_FS [Ω]
where α is dependent on the operation mode of the device.
Typical operation modes are shown in Table 4 for the nominal R_FS value. This value will produce the full-scale
current levels mentioned in Table 4 and, when terminated, voltages of standard video levels, as shown in the
applications section. The resistor value is variable provided the maximum current level on each of the DAC
outputs is not exceeded.
Table 4. THS8133 Nominal Full-Scale Currents
OPERATION MODE
DESCRIPTION
M1
M2_INT INS3_INT
GBR with sync-on-green
L
L
L
GBR with sync-on-all
L
L
H
YPbPr with sync-on-Y
(L,H), (H,L) or (HH), ac-
L
YPbPr with sync-on-all ^{cording to Tables 1 and 2}
H
† _{IFS = 1461/172 × 1.35/430}
‡ _{IFS = 1023/172 × 1.35/430}
AGY
IFS
(mA)
α
26.67† 1461/172
26.67 1461/172
26.67 1461/172
26.67 1461/172
ARPr
IFS
(mA)
α
18.67‡ 1023/172
26.67 1461/172
18.67 1023/172
18.67 1023/172
ABPb
IFS (mA)
α
18.67
26.67
18.67
18.67
1023/172
1461/172
1023/172
1023/172
absolute maximum ratings over operating free-air temperature (unless otherwise noted)^†
Supply voltage: AV_DD to AV_SS, DV_DD to DV_SS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V
AV_DD to DV_DD, AV_SS to DV_SS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 0.5 V
Digital input voltage range to DV_SS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to DV_DD + 0.5 V
Operating free-air temperature range, T_A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage temperature range, T_stg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55°C to 150°C
† _{Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and}
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
recommended operating conditions over operating free-air temperature range, T_A
power supply
Supply voltage
AVDD
DVDD
MIN NOM MAX UNIT
4.75
5 5.25
V
3 3.3/5 5.25
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