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PDF DS1866 Data sheet ( Hoja de datos )
| Número de pieza | DS1866 | |
| Descripción | Log Trimmer Potentiometer | |
| Fabricantes | Dallas Semiconducotr | |
| Logotipo |  |
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DS1866
Log Trimmer Potentiometer
FEATURES
§ Single 8-position Log Trimmer Potentiometer
5-dB/step
§ Operates from 2.7V to 5.5V supplies
§ Parallel interface control: P0, P1, P2
§ Standard Resistance Value: 10 kΩ
§ 8-pin DIPs; 8-pin (150) SOICs
§ Operating Temperature Range:
- Industrial: -40°C to +85°C
PIN ASSIGNMENT
P0
P1
H
GND
1
2
3
4
8 VCC
7 P2
6L
5W
8-Pin DIP (300-mil)
See Mech. Drawings Section
P0
P1
H
GND
1
2
3
4
8 VCC
7 P2
6L
5W
8-Pin SOIC (150-mil)
www.DataSheet4U.comSee Mech. Drawings Section
PIN DESCRIPTION
H - High End of Resistor
L - Low End of Resistor
W - Wiper Terminal
VCC - 3V or 5V Power Supply Input
P0 - Position Select - Bit 0
P1 - Position Select - Bit 1
P2 - Position Select - Bit 2
GND
- Ground
DESCRIPTION
The DS1866 Log Trimmer Potentiometer is a single volatile digital potentiometer having eight positions
with a 5-dB resolution per step. The device provides an ideal method for low-cost trimming or volume
control using a CPU or manual control input. The device’s wiper position is set to one of eight positions
by a 3-terminal parallel port. The value of the wiper position is determined by the P0, P1, and P2 port
pins.
The DS1866 is available as a 10k potentiometer and is available in an industrial temperature grade.
Additionally, the DS1866 will operate from 3V or 5V supplies and is ideal for portable applications
requiring low standby current. Two packaging options are available and include the 8-pin (300-mil) DIP,
8-pin (150-mil) SOIC.
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NOTES:
1. All voltages are referenced to ground.
DS1866
2. For VCC = 5V ± 10% maximum VIL = +0.8V. For VCC 3.0 ± 10% VIL = +0.6V. For VCC =2.7 volts VIH
=2.0 volts minimum.
3. Resistor input voltages cannot go below ground or exceed VCC by the amounts as shown in the table.
4. Maximum current specifications are based on the change rate of the parallel port inputs P0, P1, and
P2.
5. Standby current specifications apply when P0, P1, P2 logic inputs are driven within the specified VIH
or VIL levels.
6. Valid at 25°C only.
7. The end-to-end resistance tolerance of the DS1866 can be expected to shift with temperature.
However, this change will not exceed ±20% of the nominal resistor value of the part.
8. Absolute tolerance is used to compare measured wiper voltage versus expected wiper voltage as
determined by wiper position. The DS1866 is specified to provide an absolute tolerance of ±1.0 dB.
9. Tap-to-tap tolerance is used to determine the change in voltage between successive tap positions. The
DS1866 is specified to provide a tap-to-tap tolerance specification of ±1.0 dB.
10. -3 dB cutoff frequency characteristic for the DS1866 is 1 MHz.
www.DataSheet4U.com11. Capacitance values apply at 25°C.
12. This specification refers to the time difference between parallel port input changes to stabilize a wiper
transition.
DS1866 ORDERING INFORMATION
ORDERING NUMBER PACKAGE
DS1866
DS1866Z
8L DIP
8L SOIC (150-MIL)
OPERATING
TEMPERATURE
-40°C TO +85°C
-40°C TO +85°C
VERSION
10kΩ
10kΩ
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| Páginas | Total 5 Páginas | |
| PDF Descargar | [ Datasheet DS1866.PDF ] | |
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