DS1867 DALLAS [Dallas Semiconductor], DS1867 Datasheet - Page 12

• Manufacturer Part Number: DS1867
• Description: Dual Digital Potentiometer with EEPROM
• Manufacturer: DALLAS [Dallas Semiconductor]

NOTES:
1. All voltages are referenced to ground.
2. Resistor inputs cannot exceed the substrate bias voltage, 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. Test
6. Typical values are for t
7. -3 dB cutoff frequency characteristics for the DS1867 depend on potentiometer total resistance:
8. C
9. Power-down time is specified at a minimum of 4 ms. It is the time required for the DS1867 to
10. This is the time from power trip-point min (3.9V) to 3.0V to guarantee wiper storage.
11. t
12. Power trip points reference required voltage necessary for DS1867 to restore the stored wiper position
13. See Figure 11.
14. During power-up the wiper position will be set at 80H.
15. See Figure 2.
16. A device write is specified as being a controlled power-down providing enough time to complete an
17. Valid at 25 C only.
position. Test limits for absolute linearity are 1.6 LSB.
limits for relative linearity are 0.5 LSB.
DS1867-010; 1 MHz, DS1867-050; 200 kHz, DS1867-100; 100 kHz.
guarantee wiper position storage as V
setting.
EEPROM write. It is also defined as a complete bit change from one value to another, i.e., 0 to 1.
Power-downs which do not change the wiper value can be expected have 200,000-write durability.
REC
OUT
is the time required before the DS1867 stored wiper position becomes valid on power-up.
is active regardless of the state of
A
=25 C and nominal supply voltage.
CC
RST
moves from 4.5V to 3.0V.
12 of 14
.
B
, in the negative direction.
102199
DS1867