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參數(shù)資料
| 型號： | FMS3115 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | Triple Video D/A Converters 3 x 10 bit, 150 Ms/s |
| 中文描述： | 三路視頻D / A轉(zhuǎn)換3 × 10位，150 MS / s的 |
| 文件頁數(shù)： | 5/11頁 |
| 文件大小： | 486K |
| 代理商： | FMS3115 |
DATA SHEET
FMS3110/3115
Rev. 1.07 12/8/04
5
Voltage Reference
V
REF
35
+1.235 V
Voltage Reference Output/Input.
+1.235 Volts is output on this pin. An external +1.235 Volt reference
may be applied here which overrides the internal reference.
Decoupling V
REF
to GND with a 0.1μF ceramic capacitor is required.
Current-Setting Resistor.
Full-scale output current of each D/A
converter is determined by the value of the resistor connected
between R
REF
and GND. Nominal value of R
An internal voltage source of
R
REF
36
560
REF
is found from:
R
REF
= 9.1 (V
REF
/I
FS
)
where I
D/A converter (without sync). Sync is 0.4 * I
FS
is the full-scale (white) output current (in amps) from the
FS
.
D/A full-scale (white) current may also be calculated from:
I
FS
= V
FS
/R
L
Where V
(in ohms) on each D/A converter. V
voltage.
Compensation Capacitor.
connected between COMP and V
FS
is the white voltage level and R
L
is the total resistive load
is the blank to full-scale
FS
COMP
34
0.1 μF
A 0.1 μF ceramic capacitor must be
DD
to stabilize internal bias circuitry.
Power and Ground
V
DD
GND
12, 30, 31
27, 28
+5 V
0.0V
Power Supply.
Ground.
Pin Descriptions
(continued)
Pin Name
Pin Number
Value
Description
Equivalent Circuits
Figure 2. Equivalent Digital Input Circuit
Figure 3. Equivalent Analog Output Circuit
Digital
Input
V
DD
p
n
GND
V
DD
V
DD
n
p
GND
OUT
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