LTC1655LIS8 Linear Technology, LTC1655LIS8 Datasheet - Page 13

• Manufacturer Part Number: LTC1655LIS8
• Description: IC D/A CONV 16BIT R-R 8-SOIC
• Manufacturer: Linear Technology

Specifications of LTC1655LIS8

• Settling Time: 20µs
• Number Of Bits: 16
• Data Interface: Serial
• Number Of Converters: 1
• Voltage Supply Source: Single Supply
• Power Dissipation (max): 2.6mW
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: Q1028606

TYPICAL APPLICATIONS
This circuit shows a digitally programmable current source
from an external voltage source using an external op amp,
an LT1218 and an NPN transistor (2N3440). Any digital
word from 0 to 65535 is loaded into the LTC1655 and its
output correspondingly swings from 0V to 4.096V. This
voltage will be forced across the resistor R
P
1
2
3
U
CLK
D
CS/LD
IN
LTC1655
GND
Digitally Programmable Current Source
V
5V
CC
8
5
A
. If R
V
OUT
A
7
is
0.1 F
chosen to be 412 , the output current will range from
0mA at zero scale to 10mA at full scale. The minimum
voltage for V
Q1’s V
voltage source can be 5V.
3
2
–
+
LT1218
CESAT
7
4
S
voltage. With a load resistor of 50 , the
6
5V < V
FOR R
is determined by the load resistor R
S
L
< 100V
Q1
2N3440
R
412
1%
R
50
A
L
LTC1655/LTC1655L
I
1655/55L TA04
OUT
=
(D
(65536)(R
0mA TO 10mA
IN
)(4.096)
A
)
13
L
and