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Número de pieza | CAT5111 | |
Descripción | 100-Tap Digitally Programmable Potentiometer (DPP) | |
Fabricantes | Catalyst Semiconductor | |
Logotipo | ||
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CAT5111
100-Tap Digitally Programmable Potentiometer (DPP™)
with Buffered Wiper
FEATURES
100-position linear taper potentiometer
Non-volatile EEPROM wiper storage;
buffered wiper
Low power CMOS technology
Single supply operation: 2.5V - 6.0V
Increment up/down serial interface
Resistance values: 10kΩ, 50kΩ and 100kΩ
Available in PDIP, SOIC, TSSOP and MSOP
packages
APPLICATIONS
Automated product calibration
Remote control adjustments
Offset, gain and zero control
Tamper-proof calibrations
Contrast, brightness and volume controls
Motor controls and feedback systems
Programmable analog functions
For Ordering Information details, see page 12.
DESCRIPTION
The CAT5111 is a single digitally programmable
potentiometer (DPP™) designed as a electronic
replacement for mechanical potentiometers. Ideal for
automated adjustments on high volume production
lines, they are also well suited for applications where
equipment requiring periodic adjustment is either
difficult to access or located in a hazardous or remote
environment.
The CAT5111 contains a 100-tap series resistor array
connected between two terminals RH and RL. An
up/down counter and decoder that are controlled by
three input pins, determines which tap is connected to
the wiper, RWB. The CAT5111 wiper is buffered by an
op amp that operates rail to rail. The wiper setting,
stored in non-volatile memory, is not lost when the
device is powered down and is automatically recalled
when power is returned. The wiper can be adjusted to
test new system values without effecting the stored
setting. Wiper-control of the CAT5111 is
accomplished with three input control pins, C¯¯S, U/D¯,
and I¯N¯C¯. The I¯N¯C¯ input increments the wiper in the
direction which is determined by the logic state of the
U/D¯ input. The C¯¯S input is used to select the device
and also store the wiper position prior to power down.
The digitally programmable potentiometer can be
used as a buffered voltage divider. For applications
where the potentiometer is used as a 2-terminal
variable resistor, please refer to the CAT5113. The
buffered wiper of the CAT5111 is not compatible with
that application.
FUNCTIONAL DIAGRAM
VCC
U/D
Control
INC and
Memory
CS
Power On Recall
GND
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
+
–
RH
RWB
RL
1
RH
+
RWB
–
RL
Electronic Potentiometer Implementation
Doc. No. MD-2008 Rev. Q
1 page AC CONDITIONS OF TEST
VCC Range
Input Pulse Levels
Input Rise and Fall Times
Input Reference Levels
2.5V ≤ VCC ≤ 6V
0.2VCC to 0.7VCC
10ns
0.5VCC
AC OPERATING CHARACTERISTICS
VCC = +2.5V to +6.0V, VH = VCC, VL = 0V, unless otherwise specified
Symbol Parameter
Min
tCI
tDI
tID
tIL
tIH
tIC
tCPH
tCPH
tIW
tCYC
tR, tF(2)
tPU(2)
C¯¯S to I¯N¯C¯ Setup
U/D¯ to I¯N¯C¯ Setup
U/D¯ to I¯N¯C¯ Hold
I¯N¯C¯ LOW Period
I¯N¯C¯ HIGH Period
I¯N¯C¯ Inactive to C¯¯S Inactive
C¯¯S Deselect Time (NO STORE)
C¯¯S Deselect Time (STORE)
I¯N¯C¯ to VOUT Change
I¯N¯C¯ Cycle Time
I¯N¯C¯ Input Rise and Fall Time
Power-up to Wiper Stable
100
50
100
250
250
1
100
10
–
1
–
–
tWR Store Cycle
–
A.C. TIMING
www.DataSCheAet4TU5.c1om11
Typ (1)
–
–
–
–
–
–
–
–
1
–
–
–
5
Max
–
–
–
–
–
–
–
–
5
–
500
1
10
Units
ns
ns
ns
ns
ns
µs
ns
ms
µs
µs
µs
ms
ms
CS
tCI
INC
U /D
tCYC
tIL tIH
tDI tID
tIC
(store)
tCPH
90% 90%
10%
tF tR
RWB
tIW
MI(3)
Notes:
(1) Typical values are for TA = 25ºC and nominal supply voltage.
(2) This parameter is periodically sampled and not 100% tested.
(3) MI in the A.C. Timing diagram refers to the minimum incremental change in the W output due to a change in the wiper position.
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
5
Doc. No. MD-2008 Rev. Q
5 Page MSOP 8-Lead 3.0 x 3.0mm (Z) (1)(2)
E E1
TOP VIEW
A A2
A1
D
e
SIDE VIEW
b
c
www.DataSCheAet4TU5.c1om11
SYMBOL
A
A1
A2
b
c
D
E
E1
e
L
L1
L2
θ
MIN
0.05
0.75
0.22
0.13
2.90
4.80
2.90
0.40
0º
NOM
0.10
0.85
3.00
4.90
3.00
0.65 BSC
0.60
0.95 REF
0.25 BSC
MAX
1.10
0.15
0.95
0.38
0.23
3.10
5.00
3.10
0.80
6º
END VIEW
DETAIL A
L
L1
DETAIL A
θ
L2
For current Tape and Reel information, download the PDF file from:
http://www.catsemi.com/documents/tapeandreel.pdf.
Notes:
(1) All dimensions are in millimeters. Angles in degrees.
(2) Complies with JEDEC standard MS-187.
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
11
Doc. No. MD-2008 Rev. Q
11 Page |
Páginas | Total 13 Páginas | |
PDF Descargar | [ Datasheet CAT5111.PDF ] |
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