DS1267
Dual Digital Potentiometer Chip
www.dalsemi.com
FEATURES
PIN ASSIGNMENT
§ Ultra-low power consumption, quiet,
pumpless design
§ Two digitally controlled, 256-position
potentiometers
§ Serial port provides means for setting and
reading both potentiometers
§ Resistors can be connected in series to
provide increased total resistance
§ 14-pin DIP, 16-pin SOIC, 20-pin TSSOP
packages
§ Resistive elements are temperature
compensated to ±0.3 LSB relative linearity
§ Standard resistance values:
– DS1267-10 ~ 10 kΩ
– DS1267-50 ~ 50 kΩ
– DS1267-100 ~ 100 kΩ
§ Operating Temperature Range:
– Industrial: -40°C to +85°C
VB
1
16
VCC
NC
2
15
NC
H1
3
14
SOUT
L1
4
13
W0
W1
5
12
H0
RST
6
11
L0
CLK
7
10
COUT
GND
8
9
DQ
16-Pin SOIC (300-mil)
See Mech. Drawings Section
VB
RST
DQ
CLK
COUT
VCC
GND
NC
-
2
13
SOUT
L1
3
12
W0
4
11
H0
RST
5
10
L0
CLK
6
9
COUT
GND
Low End of Resistor
High End of Resistor
Wiper Terminal of Resistor
Substrate Bias Voltage
Stacked Configuration Output
Serial Port Reset Input
Serial Port Data Input
Serial Port Clock Input
Cascade Port Output
+5 Volt Supply
Ground
No Internal Connection
VCC
W1
L0, L1
H0, H1
W0, W1
VB
SOUT
14
H1
PIN DESCRIPTIONS
1
7
8
DQ
14-Pin DIP (300-mil)
See Mech. Drawings Section
VB
1
20
VCC
NC
2
19
NC
H1
3
18
NC
L1
4
17
SOUT
W1
5
16
W0
RST
6
15
H0
CLK
7
14
L0
NC
8
13
COUT
NC
9
12
NC
10
11
DQ
GND
20-Pin TSSOP (173-mil)
1 of 12
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