MCP4332-503E/ST

Manufacturer Part NumberMCP4332-503E/ST
DescriptionIC DGTL POT QUAD 50K 14TSSOP
ManufacturerMicrochip Technology
MCP4332-503E/ST datasheet
 


Specifications of MCP4332-503E/ST

Taps129Resistance (ohms)50K
Number Of Circuits4Temperature Coefficient150 ppm/°C Typical
Memory TypeVolatileInterfaceSPI Serial
Voltage - Supply1.8 V ~ 5.5 VOperating Temperature-40°C ~ 125°C
Mounting TypeSurface MountPackage / Case14-TSSOP
Resistance In Ohms50KLead Free Status / RoHS StatusLead free / RoHS Compliant
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Page 81/88

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A
V
A
N
n
(1)
R
W
R
S
N
n-1
(1)
R
R
W
S
NMOS
N
n-2
PMOS
V
WC(n-2)
R
S
R
AB
(1)
R
N
W
n-3
N
1
(1)
R
R
W
S
N
0
(1)
R
W
V
B
B
Note 1:
The wiper resistance is dependent on
several factors including, wiper code,
device V
, Terminal voltages (on A, B
DD
and W), and temperature.
FIGURE B-6:
Resistor Network Block
Diagram.
The characteristics of the wiper is determined by the
characteristics of the wiper switch at each of the
resistor networks tap points.
Figure B-7
example of a wiper switch. As the device operational
voltage becomes lower, the characteristics of the wiper
switch change due to a lower voltage on the V
Figure B-7
shows an implementation of a wiper switch.
When the transistor is turned off, the switch resistance
is in the Giga s. When the transistor is turned on, the
switch resistance is dependent on the V
V
voltages. This resistance is referred to as R
WCn
(1)
R
W
V
G
“gate”
NMOS
N
WC
V
PMOS
WCn
“gate”
Note 1: Wiper Resistance (R
) depends on the
W
voltages at the wiper switch nodes
(V
, V
and V
).
G
W
WCn
FIGURE B-7:
Wiper Switch.
 2010 Microchip Technology Inc.
So looking at the wiper voltage (V
3.0V and 1.8V data gives the graphs in
Figure
B-9. In the 1.8V graph, as the V
0.8V, the voltage increases nonlinearly. Since V = I * R,
and the current (I
device resistance increased nonlinearly at around
wiper code 160.
DV
1.2
G
1.0
0.8
0.6
0.4
W
V
0.2
W
0.0
0
FIGURE B-8:
Wiper Code (V
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0
32
shows an
FIGURE B-9:
Wiper Code (V
signal.
G
, V
and
G
W
.
W
(V
/V
)
DD
SS
Wiper
V
W
MCP433X/435X
) for the
W
Figure B-8
and
approaches
W
) is constant, it means that the
W
-40C
+25C
+85C
+125C
32
64
96
128
160
192
224
256
Wiper Code
Wiper Voltage (V
) vs.
W
= 3.0V, I
= 190
A).
µ
DD
W
-40C
+25C
+85C
+125C
64
96
128
160
192
224
256
Wiper Code
Wiper Voltage (V
) vs.
W
= 1.8V, I
= 190
A).
µ
DD
W
DS22242A-page 81