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TLC7524CN Datasheet(PDF) 7 Page - Texas Instruments

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Part No. TLC7524CN
Description  8-BIT MULTIPLYING DIGITAL-TO-ANALOG CONVERTERS
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TLC7524CN Datasheet(HTML) 7 Page - Texas Instruments

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TLC7524C, TLC7524E, TLC7524I
8BIT MULTIPLYING DIGITALTOANALOG CONVERTERS
SLAS061D − SEPTEMBER 1986 − REVISED JUNE 2007
7
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION
+
Output
RA = 2 kΩ
(see Note A)
WR
CS
DB0−DB7
Vref
C (see Note B)
RB
VDD
GND
OUT2
OUT1
RFB
NOTES: A. RA and RB used only if gain adjustment is required.
B. C phase compensation (10-15 pF) is required when using high-speed amplifiers to prevent
ringing or oscillation.
Figure 3. Unipolar Operation (2-Quadrant Multiplication)
Output
20 k
5 k
10 k
20 k
+
+
RFB
OUT1
OUT2
GND
VDD
RB
C (see Note B)
Vref
DB0−DB7
CS
WR
(see Note A)
RA = 2 kΩ
NOTES: A. RA and RB used only if gain adjustment is required.
B. C phase compensation (10-15 pF) is required when using high-speed amplifiers to prevent ringing or oscillation.
Figure 4. Bipolar Operation (4-Quadrant Operation)
Table 1. Unipolar Binary Code
Table 2. Bipolar (Offset Binary) Code
DIGITAL INPUT
(see Note 3)
ANALOG OUTPUT
DIGITAL INPUT
(see Note 4)
ANALOG OUTPUT
MSB
LSB
ANALOG OUTPUT
MSB
LSB
ANALOG OUTPUT
1 1 1 1 1 1 1 1
−Vref (255/256)
1 1 1 1 1 1 1 1
Vref (127/128)
1 0 0 0 0 0 0 1
−Vref (129/256)
1 0 0 0 0 0 0 1
Vref (1/128)
1 0 0 0 0 0 0 0
−Vref (128/256) = − Vref/2
1 0 0 0 0 0 0 0
0
0 1 1 1 1 1 1 1
−Vref (127/256)
0 1 1 1 1 1 1 1
−Vref (1/128)
0 0 0 0 0 0 0 1
−Vref (1/256)
0 0 0 0 0 0 0 1
−Vref (127/128)
0 0 0 0 0 0 0 0
0
0 0 0 0 0 0 0 0
−Vref
NOTE 3: LSB = 1/256 (Vref)
NOTE 4: LSB = 1/128 (Vref)


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