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TLC7528C Datasheet(PDF) 13 Page - Texas Instruments

Part # TLC7528C
Description  DUAL 8-BIT MULTIPLYING DIGITAL-TO-ANALOG CONVERTERS
PDF  17 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TLC7528C Datasheet(HTML) 13 Page - Texas Instruments

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256
(DAC ladder resistance)
DAC digital code
TLC7528C, TLC7528E, TLC7528I
DUAL 8-BIT MULTIPLYING
DIGITAL-TO-ANALOG CONVERTERS
SLAS062B – JANUARY 1987 – REVISED MARCH 2000
13
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
APPLICATION INFORMATION
Bandpass Out
High Pass
Out
30 k
Ω
47 pF
C3
R5
R4
R3
Low Pass Out
1000 pF
C2
C1
1000 pF
DACA
(R1)
(R2)
DACB
TLC7528
OUTA
RFBA
AGND
OUTB
REFB
RFBB
2
3
1
20
19
18
REFA
VDD
CS
WR
DGND
DACA / DACB
DACA2 and DACB2
A3
A2
A1
DACA1 AND DACB1
Data In
VI
DACA / DACB
6
DGND
5
WR
16
CS
15
DB0 – DB7
14 – 7
17
VDD
REFA
4
18
19
20
1
3
2
RFBB
REFB
OUTB
AGND
RFBA
OUTA
TLC7528
DACB
(RF)
(RS)
DACA
Q
+
R
3
R
4
·
R
F
R
fb(DACB1)
C1 = C2, R1 = R2, R4 = R5
G
+ –
R
F
R
S
30 k
Ω
10 k
Ω
A4
14 – 7
DB0 – DB7
8
8
Data In
6
5
16
15
17
4
R
fb
is the internal resistor connected between OUTB and RFBB
Where:
Circuit Equations:
NOTES: A. Op-amps A1, A2, A3, and A4 are TL287.
B. CS compensates for the op-amp gain-bandwidth limitations.
C. DAC equivalent resistance equals
Figure 10. Digitally Controlled State-Variable Filter



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