TLC5615C_07 Datasheet, PDF (8/21 Pages) Texas Instruments – 10-BIT DIGITAL-TO-ANALOG CONVERTERS

TLC5615C, TLC5615I
SLAS142E – OCTOBER 1996 – REVISED JUNE 2007
APPLICATION INFORMATION
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GENERAL FUNCTION
The TLC5615 uses a resistor string network buffered with an op amp in a fixed gain of 2 to convert 10-bit digital
data to analog voltage levels (see functional block diagram and Figure 9). The output of the TLC5615 is the
same polarity as the reference input (see Table 1).
An internal circuit resets the DAC register to all zeros on power up.
DIN SCLK CS DOUT
REFIN
+
_
Resistor
+
String
_
DAC
R
OUT
R
AGND
V_DD
5V
0.1 µF
Figure 9. TLC5615 Typical Operating Circuit
Table 1. Binary Code Table (0V to 2V_REFINOutput)_, Gain = 2
INPUT ⁽¹⁾
OUTPUT
1111
1111
:
11(00)
ǒ Ǔ _{2 VREFIN}
1023
1024
:
1000
0000
01(00)
ǒ Ǔ _{2 VREFIN}
513
1024
1000
0000
00(00)
ǒ Ǔ _{2 VREFIN}
512
1024
+
VREFIN
0111
1111
:
11(00)
2^ǒVREFIN^Ǔ
511
1024
:
0000
0000
0000
0000
01(00)
00(00)
2^ǒVREFIN^Ǔ
1
1024
0V
(1) A 10-bit data word with two bits below the LSB bit (sub-LSB) with 0 values must be written since the DAC input latch is 12 bits wide.
8
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