cat5133 Catalyst Semiconductor, cat5133 Datasheet - Page 3

• Manufacturer Part Number: cat5133
• Description: 16 Volt Digitally Programmable Potentiometer Dpp? With 128 Taps And An Increment Decrement Interface
• Manufacturer: Catalyst Semiconductor

POWER-ON AND POTENTIOMETER CHARACTERISTICS
The CAT5133 is a 128-position, digital controlled
potentiometer. When applying power to the CAT5133,
V
V+. At the same time, the signals on R
terminals should not exceed V+. If V+ is applied before
V
the absence of the switch control signals, that could
result in multiple switches being turned on. This
causes unexpected wiper settings and possible current
overload of the potentiometer.
When V
point wiper location (64) until the wiper register can be
loaded
previously stored in the device. After the nonvolatile
memory data is loaded into the wiper register the
wiper location will change to the previously stored
wiper position.
At power-down, it is recommended to turn-off first the
signals on R
that, V
the wiper and uncontrolled current overload of the
potentiometer.
Potentiometer Resistance and Wiper Resistance Offset Effects
ABSOLUTE MAXIMUM RATINGS
Notes:
(1) Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings
(2) Latch-up protection is provided for stresses up to 100mA on the digital from -0.3V to V
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
Parameters
Temperature Under Bias
Storage Temperature
Voltage on any U/D ¯ , INC
Voltage on R
V
V+ with respect to Ground
Wiper Current
Lead Soldering temperature (10 seconds)
CC
CC
Position
CC
, the electronic switches of the DPP are powered in
only, and functional operation of the device at these or any other conditions outside of those listed in the operational sections of this
specification is not implied. Exposure to any absolute maximum rating for extended periods may affect device performance and reliability.
must be supplied prior to or simultaneously with
127
01
63
with Respect to Ground
0
CC
CC
, in order to avoid unexpected transitions of
with
is applied, the device turns on at the mid-
H
, R
Typical R
H
10,070Ω or
, R
the
5,047Ω or
W
149Ω or
L
, & R
70Ω or
and R
for 10kΩ DPP
nonvolatile
¯¯¯,& CS
W
W
L
Pins with Respect to V
to R
, followed by V+ and, after
¯¯¯ Pins with Respect to V
10,000Ω + 70Ω
4,977Ω + 70Ω
L
Resistance
79Ω + 70Ω
0Ω + 70Ω
memory
H
, R
(1)
W
location
and R
CC
L
CC
3
(2)
The end-to-end nominal resistance of the potentio-
meter has 128 contact points linearly distributed
across the total resistor. Each of these contact points
is addressed by the 7 bit wiper register which is
decoded to select one of these 128 contact points.
Each contact point generates a linear resistive value
between the 0 position and the 127 position. These
values can be determined by dividing the end-to-end
value of the potentiometer by 127. The 10kΩ
potentiometer has a resistance of ~79Ω  b etween each
wiper position. However in addition to the ~79Ω   f or
each resistive segment of the potentiometer, a wiper
resistance offset must be considered. Table 8 shows
the effect of this value and how it would appear on the
wiper terminal.
This offset will appear in each of the CAT5133 end-to-
end resistance values in the same way as the 10kΩ
 e xample. However resistance between each wiper
position for the 50kΩ version will be ~395Ω and for
the100kΩ version will be ~790Ω.
Position
126
127
00
64
CC
Ratings
-55 to +125
-65 to +150
-0.3 to +V
V+
-0.3 to +6.0
-0.3 to +16.5
±6
+300
Typical R
10,070Ω or
+0.3V.
5,047Ω or
149Ω or
70Ω or
for 10kΩ DPP
CC
W
+0.3
to R
10,000Ω + 70Ω
4,977Ω + 70Ω
H
Resistance
79Ω + 70Ω
0Ω + 70Ω
Doc. No. MD-2125 Rev. C
CAT5133
Units
mA
°C
°C
°C
V
V
V
V