DS1868 Dallas Semiconducotr, DS1868 Datasheet - Page 11

• Manufacturer Part Number: DS1868
• Description: Dual Digital Potentiometer Chip
• Manufacturer: Dallas Semiconducotr

www.DataSheet4U.com
CAPACITANCE
AC ELECTRICAL CHARACTERISTICS
NOTES:
1. All voltages are referenced to ground.
2. Resistor inputs cannot exceed V
3. Capacitance values apply at 25 C.
4. Absolute linearity is used to determine wiper voltage versus expected voltage as determined by wiper
5. Relative linearity is used to determine the change in voltage between successive tap positions. Device
6. Typical values are for t
7. -3 dB cutoff frequency characteristics for the DS1868 depend on potentiometer total resistance:
8. Cout is active regardless of the state of
9. V
10. See Figure 9(a), (b), and (c).
11. Noise < -120 dB/
12. Supply current is dependent on clock rate (see Figure 11).
13. See Figure 10.
14. Standby currents apply when
15. When biasing the substrate minimum V
16. Valid at 25 C only.
PARAMETER
Input Capacitance
Output Capacitance
PARAMETER
CLK Frequency
Width of CLK Pulse
Data Setup Time
Data Hold Time
Propagation Delay Time Low to High Level
Clock to Output
Propagation Delay Time High to Low Level
Clock Low to Data Valid on a Read
CLK Rise Time, CLK Fall Time
RST
RST
RST
position. Device test limits 1.6 LSB.
test limits 0.5 LSB.
DS1868-010; 1 MHz, DS1868-050; 200 kHz; and DS1868-100; 80 kHz.
REF
High to Clock Input High
Low from Clock Input High
Inactive
= 1.5 volts.
www.DataSheet4U.com
Hz
. Reference 1 volt (thermal).
A
= 25 C and nominal supply voltage.
RST
B
- 0.5V in the negative direction.
, LLIC, DQ are in the low-state.
RST
B
= -3.0V 10% and maximum V
SYMBOL
SYMBOL
.
11 of 14
C
f
t
t
t
t
t
t
C
t
t
CDH
t
CDD
t
HLT
CLK
PLH
PLH
RLT
OUT
CH
DC
CC
CR
IN
(-40 C to +85 C; V
MIN
MIN
125
DC
50
30
10
50
50
TYP
TYP
CC
MAX UNITS
MAX UNITS
10
50
50
30
50
5
7
= 3.0V
CC
=5.0V
MHz
pF
pF
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
10%.
(t
www.DataSheet
www.DataSheet
www.DataSheet
www.DataSheet4U
A
=25 C)
NOTES
NOTES
10%)
10, 13
10, 13
DS1868
3, 6
3, 6
10
10
10
10
10
10
10
10
10
4U
4U.com
4U
.com
.com
.com