DS1804X-010/T&R Maxim Integrated Products, DS1804X-010/T&R Datasheet - Page 2
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DS1804X-010/T&R
Manufacturer Part Number
DS1804X-010/T&R
Description
Digital Potentiometer ICs
Manufacturer
Maxim Integrated Products
Datasheet
1.DS1804-010.pdf
(8 pages)
Specifications of DS1804X-010/T&R
Number Of Pots
Single
Taps Per Pot
100
Resistance
10 KOhms
Wiper Memory
Non Volatile
Digital Interface
Increment-Decrement
Operating Supply Voltage
3 V, 5 V
Supply Current
400 uA
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Mounting Style
SMD/SMT
Supply Voltage (max)
5.5 V
Supply Voltage (min)
2.7 V
Package / Case
Flip-Chip-8
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
OPERATION
The DS1804 is a single nonvolatile potentiometer. The device has a total of 100 tap-points including the
L- and H- terminals. A total of 99 resistive segments exist between the L- and H- terminals. These tap-
points are accessible to the W-terminal, whose position is controlled via a three-terminal control port. A
block diagram of the DS1804 is shown in Figure 1.
The three-terminal port of the DS1804 provides an increment/decrement interface which is activated via a
chip-select input. This interface consists of the input signals
control a 7-bit up/down counter. The output of the 7-bit up/down counter controls a 1 of 100 decoder to
select wiper position. Additionally, this interface provides for a wiper storage operation using the
PIN DESCRIPTIONS
V
GND - Ground.
H - High-Terminal Potentiometer. This is the high terminal of the potentiometer. It is not required that
this terminal be connected to a potential greater than the L-terminal. Voltage applied to the H-terminal
cannot exceed the power-supply voltage, V
L - Low-Terminal Potentiometer. This is the low terminal of the potentiometer. It is not required that this
terminal be connected to a potential less than the H-terminal. Voltage applied to the L-terminal cannot
exceed the power-supply voltage, V
W - Wiper of the Potentiometer. This pin is the wiper of the potentiometer. Its position on the resistor
array is controlled by the three-terminal control port. Voltage applied to the wiper cannot exceed the
power-supply voltage, V
low. When in a high-state, activity on the
position.
Wiper position changes of the W-terminal will occur one position per high-to-low transition of this input
signal. Position changes will not occur if the
U/
is low, any high-to-low transition on
H-terminal. When in a low state and
position of the wiper to move towards the L-terminal.
CS
INC
INC
CC
D
- Chip Select. The
- Power Supply. The DS1804 will support supply voltages ranging from +2.7V to +5.5V.
input control pins. The timing diagram for the three-terminal interface control is shown in Figure 2.
- Wiper Movement Control. This input provides for wiper position changes when the
- Up/Down Control. This input sets the direction of wiper movement. When in a high state and
CS
CC
, or go below ground.
input is used to activate the control port of the DS1804. This input is active
CC
, or go below ground.
INC
CS
CC
will cause a one position movement of the wiper towards the
CS
is low, any high-to-low transitions on
, or go below ground.
INC
pin is in a high state.
2 of 8
and U/
D
port pins will not affect or change wiper
CS
,
INC
, and U/
D
. These input signals
INC
will cause the
CS
pin is low.
CS
and
CS