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PDF X93255 Data sheet ( Hoja de datos )
| Número de pieza | X93255 | |
| Descripción | Dual Digitally Controlled Potentiometers | |
| Fabricantes | Intersil Corporation | |
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®
Data Sheet
March 4, 2005
X93255
FN8187.0
Dual Digitally Controlled Potentiometers
(XDCPs™)
FEATURES
• Dual solid-state potentiometers
• Independent Up/Down interfaces
• 32 wiper tap points per potentiometer
—Wiper position stored in nonvolatile memory
and recalled on power-up
• 31 resistive elements per potentiometer
—Temperature compensated
—Maximum resistance tolerance ± 25%
—Terminal voltage, 0 to VCC
• Low power CMOS
—VCC = 5V ± 10%
—Active current, 200µA typ.
—Standby current, 4µA max
• High reliability
—Endurance 200,000 data changes per bit
—Register data retention, 100 years
• RTOTAL value = 50kΩ
• Packages
—14-lead TSSOP
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DESCRIPTION
The Intersil X93255 is a dual digitally controlled
potentiometer (XDCP). The device consists of two
resistor arrays, wiper switches, a control section, and
nonvolatile memory. The wiper positions are controlled
by individual Up/Down interfaces.
A potentiometer is implemented by a resistor array
composed of 31 resistive elements and a wiper switching
network. The position of each wiper element is controlled
by a set of independent CS, U/D, and INC inputs. The
position of the wiper can be stored in nonvolatile memory
and then be recalled upon a subsequent power-up
operation.
Each potentiometer is connected as a two-terminal
variable resistor and can be used in a wide variety of
applications including:
– bias and gain control
– LCD Contrast Adjustment
BLOCK DIAGRAM
VCC (Supply Voltage)
Up/Down
(U/D1)
Increment
(INC1)
Device Select
(CS1)
30kΩ
30kΩ
Control
and
Memory
RH1
RL1
RH2
Up/Down
(U/D2)
Increment
(INC2)
Control
and
Memory
RL2
Device Select
(CS2)
VSS (Ground)
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-352-6832 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
XDCP is a trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2005. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
1 page  
X93255
A.C. OPERATING CHARACTERISTICS (Over recommended operating conditions unless otherwise specified. In the
table, CS, INC, U/D, RH and RL are used to refer to either CS1 or CS2, etc.)
Symbol
Parameter
Min.
Limits
Typ.(6)
Max.
Unit
tCl
tlD
tDI
tlL
tlH
tlC
tCPH
tCPH
tCYC
tR, tF(6)
tR VCC(6)
tWR
CS to INC setup
INC HIGH to U/D change
U/D to INC setup
INC LOW period
INC HIGH period
INC Inactive to CS inactive
CS Deselect time (NO STORE)
CS Deselect time (STORE)
INC cycle time
INC input rise and fall time
VCC power-up rate
Store cycle
100 ns
100 ns
100 ns
1 µs
1 µs
1 µs
250 ns
10 ms
2 µs
500 µs
1
10,000
V/ms
5 10 ms
POWER-UP AND DOWN REQUIREMENTS
There are no restrictions on the power-up or power-down conditions of VCC and the voltages applied to the potentiometer
pins provided that VCC is always more positive than or equal to VH and VL, i.e., VCC ≥ VH,VL. The VCC ramp rate spec is
always in effect.
A.C. TIMING (In the table, CS, INC, U/D, RH and RL are used to refer to either CS1 or CS2, etc.)
CS
tCI
INC
U/D
tCYC
tIL tIH
tIC
tID tDI
(Store)
tCPH
90% 90%
10%
tF tR
5 FN8187.0
March 4, 2005
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet X93255.PDF ] | |
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