參數(shù)資料
型號(hào)： TMC3503R2C50T
廠商： FAIRCHILD SEMICONDUCTOR CORP
元件分類： DAC
英文描述： PARALLEL, 8 BITS INPUT LOADING, 0.015 us SETTLING TIME, 8-BIT DAC, PQCC44
封裝： PLASTIC, LCC-44
文件頁(yè)數(shù)： 13/17頁(yè)
文件大小： 106K
代理商： TMC3503R2C50T
PRODUCT SPECIFICATION
TMC3503
REV. 1.02 11/24/99
5
Equivalent Circuits
Figure 2. Equivalent Digital Input Circuit Figure 3. Equivalent Analog Output Circuit
RREF
36
42
590
Current-setting Resistor. The full-scale output current of each
D/A converter is determined by the value of the resistor
connected between RREF and GND. The nominal value for
RREF is found from:
RREF = 9.1 (VREF/IFS)
where IFS is the full-scale (white) output current (amps) from the
D/A converter (without sync). Sync is 0.4 IFS.
D/A full-scale (white) current may also be calculated from:
IFS = VFS/RL
Where VFS is the white voltage level and RL is the total resistive
load (ohms) on each D/A converter. VFS is the blank to full-scale
voltage.
COMP
34
40
0.1 F
Compensation Capacitor. A 0.1 F ceramic capacitor must be
connected between COMP and VDD to stabilize internal bias
circuitry.
Power, Ground
VDD
12, 30, 31 17, 34–36
+5 V
Power Supply.
GND
1, 14, 15,
27, 28, 38,
39, 48
29–32
0.0V
Ground.
NC
13, 24, 25,
37
——
No Connect
Pin
Name
Pin Number
Value
Pin Function Description
LQFP
PLCC
np
OUT
GND
27013B
VDD
Digital
Input
VDD
p
n
27014D
GND
Pin Descriptions (continued)
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