Datasheet

© 2009 Microchip Technology Inc. DS22152B-page 7
MCP40D17/18/19
Rheostat Integral
Non-linearity
MCP40D18
(Note 3)
MCP40D17 and
MCP40D19
devices only
(Note 3)
R-INL -2.0 ±0.5 +2.0 LSb 5 kΩ 5.5V, I
W
= 900 µA
-5.0 +3.5 +5.0 LSb 2.7V, I
W
= 430 µA (Note 6)
See Section 2.0 LSb 1.8V (Note 6)
-2.0 ±0.5 +2.0 LSb 10 kΩ 5.5V, I
W
= 450 µA
-4.0 +2.5 +4.0 LSb 2.7V, I
W
= 215 µA (Note 6)
See Section 2.0 LSb 1.8V (Note 6)
-1.125 ±0.5 +1.125 LSb 50 kΩ 5.5V, I
W
= 90 µA
-1.5 +1 +1.5 LSb 2.7V, I
W
= 43 µA (Note 6)
See Section 2.0 LSb 1.8V (Note 6)
-0.8 ±0.5 +0.8 LSb 100 kΩ 5.5V, I
W
= 45 µA
-1.125 +0.25 +1.125 LSb 2.7V, I
W
= 21.5 µA (Note 6)
See Section 2.0 LSb 1.8V (Note 6)
Rheostat
Differential
Non-linearity
MCP40D18
(Note 3)
MCP40D17 and
MCP40D19
devices only
(Note 3)
R-DNL -0.5 ±0.25 +0.5 LSb 5 kΩ 5.5V, I
W
= 900 mA
-0.75 +0.5 +0.75 LSb 2.7V, I
W
= 430 µA (Note 6)
See Section 2.0 LSb 1.8V (Note 6)
-0.5 ±0.25 +0.5 LSb 10 kΩ 5.5V, I
W
= 450 µA
-0.75 +0.5 +0.75 LSb 2.7V, I
W
= 215 µA (Note 6)
See Section 2.0 LSb 1.8V (Note 6)
-0.375 ±0.25 +0.375 LSb 50 kΩ 5.5V, I
W
= 90 µA
-0.375 ±0.25 +0.375 LSb 2.7V, I
W
= 43 µA (Note 6)
See Section 2.0 LSb 1.8V (Note 6)
-0.375 ±0.25 +0.375 LSb 100 kΩ 5.5V, I
W
= 45 µA
-0.375 ±0.25 +0.375 LSb 2.7V, I
W
= 21.5 µA (Note 6)
See Section 2.0 LSb 1.8V (Note 6)
Capacitance (P
A
)C
AW
— 75 — pF f =1 MHz, Code = Full Scale
Capacitance (P
w
)C
W
— 120 — pF f =1 MHz, Code = Full Scale
Capacitance (P
B
)C
BW
— 75 — pF f =1 MHz, Code = Full Scale
AC/DC CHARACTERISTICS (CONTINUED)
DC Characteristics
Standard Operating Conditions (unless otherwise specified)
Operating Temperature –40°C ≤ T
A
≤ +125°C (extended)
All parameters apply across the specified operating ranges unless noted.
V
DD
= +2.7V to 5.5V, 5 kΩ, 10 kΩ, 50 kΩ, 100 kΩ devices.
Typical specifications represent values for V
DD
= 5.5V, T
A
= +25°C.
Parameters Sym Min Typ Max Units Conditions
Note 1: Resistance is defined as the resistance between terminal A to terminal B.
2: INL and DNL are measured at V
W
with V
A
= V
DD
and V
B
= V
SS
.
3: MCP40D18 device only, includes V
WZSE
and V
WFSE
.
4: Resistor terminals A, W and B’s polarity with respect to each other is not restricted.
5: This specification by design.
6: Non-linearity is affected by wiper resistance (R
W
), which changes significantly over voltage and
temperature.
7: POR/BOR is not rate dependent.
8: Supply current is independent of current through the resistor network