LTC1657 View Datasheet(PDF) - Linear Technology
Part Name
Description
Manufacturer
LTC1657 Datasheet PDF : 16 Pages
| |||
LTC1657/LTC1657L
TYPICAL APPLICATIO S
This circuit shows how to make a bipolar output 16-bit
DAC with a wide output swing using an LTC1657 and an
LT1077. R1 and R2 resistively divide down the LTC1657
output and an offset is summed in using the LTC1657
onboard 2.048V reference and R3 and R4. R5 ensures that
the onboard reference is always sourcing current and
never has to sink any current even when VOUT is at full
scale. The LT1077 output will have a wide bipolar output
swing of – 4.096V to 4.096V as shown in the figure below.
With this output swing, 1LSB = 125µV.
A Wide Swing, Bipolar Output 16-Bit DAC
5V
0.1µF
24
5:19
DATA (0:15)
VCC
2
CSLSB
3
µP
CSMSB
1
LTC1657
VOUT 25
WR
R1
28
LDAC
100k
27 CLR X1/X2 REFLO GND REFHI REFOUT
1%
26 21 20
22
23
R2
200k
1%
R3
100k
1%
R5
100k
1%
5V
3+ 7
6
LT1077
2–
4
R4
– 5V 200k
1%
VOUT:
(2)(DIN)(4.096)
65536
–
4.096V
1657 TA05
4.096
TRANSFER CURVE
0
VOUT
32768
65535
DIN
– 4.096
12
Share Link: 