參數(shù)資料
型號(hào): THS8134BCPHP
廠商: TEXAS INSTRUMENTS INC
元件分類(lèi): DAC
英文描述: PARALLEL, 8 BITS INPUT LOADING, 0.005 us SETTLING TIME, 8-BIT DAC, PQFP48
封裝: PLASTIC, HTQFP-48
文件頁(yè)數(shù): 2/27頁(yè)
文件大?。?/td> 553K
代理商: THS8134BCPHP
THS8134, THS8134A, THS8134B
TRIPLE 8BIT, 80 MSPS VIDEO D/A CONVERTER
WITH TRILEVEL SYNC GENERATION
SLVS205D MAY 1999 REVISED MARCH 2000
10
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
POST OFFICE BOX 1443
HOUSTON, TEXAS 772511443
output amplitude control (continued)
The exact relationship between RFS 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 RFS is given by:
IFS [A] = α x VREF [V] ÷ RFS []
where
α is dependent on the operation mode of the device.
Typical operation modes are shown in Table 4 for the nominal RFS 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. THS8134 Nominal Full-Scale Currents
OPERATION MODE
AGY
ARPr
ABPb
OPERATION MODE
DESCRIPTION
M1
M2_INT
INS3_INT
IFS
(mA)
α
IFS
(mA)
α
IFS (mA)
α
GBR with sync-on-green
L
26.67
1461/172
18.67
1023/172
18.67
1023/172
GBR with sync-on-all
L
H
26.67
1461/172
26.67
1461/172
26.67
1461/172
YPbPr with sync-on-Y
(L,H), (H,L) or (HH),
L
26.67
1461/172
18.67
1023/172
18.67
1023/172
YPbPr with sync-on-all
(L,H), (H,L) or (HH),
according to Tables 1 and 2
H
26.67
1461/172
18.67
1023/172
18.67
1023/172
IFS = 1461/172 × 1.35/430
IFS = 1023/172 × 1.35/430
absolute maximum ratings over operating free-air temperature (unless otherwise noted)§
Supply voltage: AVDD to AVSS, DVDD to DVSS
–0.5 V to 7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AVDD to DVDD, AVSS to DVSS
–0.5 V to 0.5 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Digital input voltage range to DVSS
0.5 V to DVDD + 0.5 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range, TA
0
°C to 70°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, Tstg
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.
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