Datasheet

© 2009 Microchip Technology Inc. DS22152B-page 5
MCP40D17/18/19
Resistance
(± 20%)
R
AB
4.0 5 6.0 kΩ -502 devices (Note 1)
8.0 10 12.0 kΩ -103 devices (Note 1)
40.0 50 60.0 kΩ -503 devices (Note 1)
80.0 100 120.0 kΩ -104 devices (Note 1)
Resolution N 128 Taps No Missing Codes
Step Resistance R
S
—R
AB
/
(127)
— Ω Note 5
Wiper Resistance R
W
— 100 170 Ω V
DD
= 5.5 V, I
W
= 2.0 mA, code = 00h
— 155 325 Ω V
DD
= 2.7 V, I
W
= 2.0 mA, code = 00h
Nominal
Resistance
Tempco
ΔR
AB
/ΔT — 50 — ppm/°C T
A
= -20°C to +70°C
— 100 — ppm/°C T
A
= -40°C to +85°C
— 150 — ppm/°C T
A
= -40°C to +125°C
Ratiometeric
Tempco
ΔV
WB
/ΔT — 15 — ppm/°C Code = Midscale (3Fh)
Resistor Terminal
Input Voltage
Range (Terminals
A, B and W)
V
A,
V
W,
V
B
Vss — V
DD
V Note 4, Note 5
Maximum current
through Terminal
(A, W or B)
Note 5
I
T
— — 2.5 mA Terminal A
I
AW
, W = Full Scale (FS)
— — 2.5 mA Terminal B
I
BW
, W = Zero Scale (ZS)
— — 2.5 mA Terminal W
I
AW
or I
BW
, W = FS or ZS
— — 1.38 mA
Terminal A
and
Terminal B
I
AB
, V
B
= 0V, V
A
= 5.5V,
R
AB(MIN)
= 4000
— — 0.688 mA
I
AB
, V
B
= 0V, V
A
= 5.5V,
R
AB(MIN)
= 8000
— — 0.138 mA
I
AB
, V
B
= 0V, V
A
= 5.5V,
R
AB(MIN)
= 40000
— — 0.069 mA
I
AB
, V
B
= 0V, V
A
= 5.5V,
R
AB(MIN)
= 80000
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