TLC7528C Datasheet, PDF (7/17 Pages) Texas Instruments – DUAL 8-BIT MULTIPLYING DIGITAL-TO-ANALOG CONVERTERS

TLC7528C, TLC7528E, TLC7528I
DUAL 8-BIT MULTIPLYING
DIGITAL-TO-ANALOG CONVERTERS
SLAS062B – JANUARY 1987 – REVISED MARCH 2000
APPLICATION INFORMATION
These devices are capable of performing 2-quadrant or full 4-quadrant multiplication. Circuit configurations for
2-quadrant and 4-quadrant multiplication are shown in Figures 3 and 4. Tables 1 and 2 summarize input coding
for unipolar and bipolar operation.
VI(A)
± 10 V
17
VDD
14
DB0
DB7
7
Input
Buffer
R1 (see Note A)
RFBA
R2 (see Note A)
8
ÎÎÎÎ _Latch
REFA
OUTA
8
DACA
ÎÎÎÎÎÎÎÎ_AGND
C1
(see Note B)
VOA
DACA / DACB ⁶
15
CS
WR ¹⁶
5
DGND
RFBB
R4 (see Note A)
Control
Logic
ÎÎÎ ÎÎÎÎ ₈
OUTB
8
ÎÎÎ ÎÎÎÎ _Latch
DACB
ÎÎÎÎÎÎ ÎÎÎÎÎÎÎÎ _REFB
AGND
C2
(see Note B)
AGND
VOB
RECOMMENDED TRIM
RESISTOR VALUES
R1, R3 500 Ω
R2, R4 150 Ω
R3 (see Note A)
VI(B)
± 10 V
NOTES: A. R1, R2, R3, and R4 are used only if gain adjustment is required. See table for recommended values. Make gain adjustment with
digital input of 255.
B. C1 and C2 phase compensation capacitors (10 pF to 15 pF) are required when using high-speed amplifiers to prevent ringing or
oscillation.
Figure 3. Unipolar Operation (2-Quadrant Multiplication)
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