TLC5617_05 Datasheet, PDF (11/21 Pages) Texas Instruments – PROGRAMMABLE DUAL 10-BIT DIGITAL-TO-ANALOG CONVERTERS

TLC5617, TLC5617A
PROGRAMMABLE DUAL 10-BIT DIGITAL-TO-ANALOG CONVERTERS
APPLICATION INFORMATION
SLAS151B – JULY 1997 – REVISED MARCH 2000
general function
The TLC5617 uses a resistor string network buffered with an op amp to convert 10-bit digital data to analog
voltage levels (see functional block diagram and Figure 17). The output of the TLC5617 is the same polarity
ǒ Ǔ ^{as the reference input (see Table 1).}
The output code is given by: 2
VREFIN
CODE
1024
An internal circuit resets the DAC register to all 0s on power up.
+
_
REFIN
DIN
CS
SCLK
Resistor
String
DAC
+ ^×2
_
R
R
OUT
AGND
VDD
5V
0.1 µF
Figure 17. TLC5617 Typical Operating Circuit
Table 1. Binary Code Table (0 V to 2 V_REFIN Output)_, Gain = 2
1111
1000
1000
0111
0000
INPUT†
1111
:
0000
11(00)
01(00)
0000 00(00)
1111
:
0000
11(00)
01(00)
ǒ Ǔ^OUTPUT
2
VREFIN
1023
1024
:
ǒ Ǔ ₂
VREFIN
513
1024
ǒ Ǔ _{+ 2}
VREFIN
512
1024
VREFIN
ǒ Ǔ ₂
VREFIN
511
1024
ǒ Ǔ^:
2
VREFIN
1
1024
0000
0000 00(00)
0V
† _{A 10-bit data word with two sub-LSB 0s must be written since the DAC input}
latch is 12 bits wide.
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