Datasheet

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SLAS060F − JANUARY 1995 − REVISED APRIL 2009
14
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
APPLICATION INFORMATION
staircase window comparator (continued)
REF
OUTB
OUTA
OUTD
OUTC
AGND
Window 1
Window 2
Window 3
Windows 1 and 2
Windows 2 and 3
Figure 13. Overlapping Window Structure
output buffer amplifier
The unity-gain output amplifier is capable of sourcing 5 mA into a 2-kΩ load and can drive a 3300-pF capacitor.
The output can be shorted to AGND indefinitely or it can be shorted to any voltage between V
SS
and V
DD
consistent with the maximum device power dissipation.
multiplying DAC
The TLC7226 can be used as a multiplying DAC when the reference signal is maintained between 2 V and
V
DD
− 4 V. When this configuration is used, V
DD
should be 14.25 V to 15.75 V. A low output-impedance buffer
should be used so that the input signal is not loaded by the resistor ladder. Figure 14 shows the general
schematic.
_
+
_
+
DAC
AGND DGND
56
1/4 TLC7226
4
15 V
V
ref
OP07
15 V
R1
R2
AC Reference
Input Signal
V
O
Figure 14. AC Signal Input Scheme