Rainbow Electronics DS1804 - Manual (Page 6)

DS1804
6 of 7 102699
NOTES:
1. All voltages are referenced to ground.
2. Valid for V
CC
= 5V only.
3. Resistor input voltages cannot go below ground or exceed V
CC
by the amounts as shown in the table.
4. Maximum current specifications are based on the clock rate of INC input. This specification
represents the current required when changing the wiper position.
5. Standby current levels apply when all inputs are driven to appropriate supply levels. CS , INC , U/ D =
V
CC
.
6. Wiper load time is specified as the time required for the DS1804 to load the wiper position with the
contents of nonvolatile memory once V
CC
has reached a stable operating voltage equal to or greater
than 2.7V.
7. The DS1804 is available in three resistor values. These include the DS1804-010; 10 k
Ω, the DS1804-
050 50 k
Ω; and the DS1804-100 100 kΩ.
8. Valid at 25°C only.
9. Absolute linearity is used to compare measured wiper voltage versus expected wiper voltage as
determined by wiper position. The DS1804 is specified to provide an absolute linearity of ±0.60 LSB.
10. Relative linearity is used to determined the change in voltage between successive tap positions. The
DS1804 is specified to provide a relative linearity specification of ±0.25 LSB.
11. -3 dB cutoff frequency characteristics for the DS1804 depend on potentiometer total resistance.
DS1804-010, 1 MHz, DS1804-050; 200 kHz, and DS1804-100; 100 kHz.
12. Capacitance values apply at 25°C.
13. See Figure 2.
14. Power-up time is specified as the time required before the 3-terminal control becomes active after a
stable power supply level has been reached.
15. At V
CC
= 2.7V, V
IL
= 0.8V.
16. The INC low to CS inactive is specified to be 50 ns minimum. This is the transition condition which
allows the DS1804 3-terminal port to become inactive without writing the EEPROM memory of the
part.
17. Wiper Storage Time, t
WST
, is the time require for the DS1804 to write EEPROM memory for storage
of a new wiper position. The maximum time required to accomplish this task is specified at 10 ms.