Datasheet

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APPLICATION INFORMATION
GENERAL FUNCTION
_
+
Resistor
String
DAC
5 V
0.1 µF
AGND V
DD
OUT
REFIN
DIN SCLK CS
DOUT
R
R
_
+
2
ǒ
V
REFIN
Ǔ
1023
1024
2
ǒ
V
REFIN
Ǔ
513
1024
2
ǒ
V
REFIN
Ǔ
512
1024
+ V
REFIN
2
ǒ
V
REFIN
Ǔ
511
1024
2
ǒ
V
REFIN
Ǔ
1
1024
TLC5615C , TLC5615I
SLAS142E – OCTOBER 1996 – REVISED JUNE 2007
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.
Figure 9. TLC5615 Typical Operating Circuit
Table 1. Binary Code Table (0V to 2V
REFIN
Output)
,
Gain = 2
INPUT
(1)
OUTPUT
1111 1111 11(00)
: :
1000 0000 01(00)
1000 0000 00(00)
0111 1111 11(00)
: :
0000 0000 01(00)
0000 0000 00(00) 0 V
(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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