MCP4014T-202E/OT Microchip Technology, MCP4014T-202E/OT Datasheet - Page 44

• Manufacturer Part Number: MCP4014T-202E/OT
• Description: IC DGTL POT 2.1K 1CH RHE SOT23-5
• Manufacturer: Microchip Technology

Specifications of MCP4014T-202E/OT

• Taps: 64
• Resistance (ohms): 2.1K
• Number Of Circuits: 1
• Temperature Coefficient: 150 ppm/°C Typical
• Memory Type: Volatile
• Interface: Up/Down
• Voltage - Supply: 1.8 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: SOT-23-5, SC-74A, SOT-25
• Resistance In Ohms: 2.10K
• End To End Resistance: 2.1kohm
• No. Of Steps: 64
• Resistance Tolerance: ± 20%
• Supply Voltage Range: 2.7V To 5.5V
• Control Interface: 2 Wire, Serial
• No. Of Pots: Single
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: MCP4014T-202E/OTTR

MCP4011/2/3/4
8.2
Figure 8-3, Figure 8-4 and Figure 8-5 illustrate typical
amplifier circuits that could replace fixed resistors with
the MCP4011/2/3/4 to achieve digitally-adjustable
analog solutions.
Figure 8-4 shows a circuit that allows a non-inverting
amplifier to have its’ offset and gain to be independently
trimmed. The MCP4011 is used along with resistors R1
and R2 to set the offset voltage. The sum of R1 + R2
resistance should be significantly greater (> 100 times)
the resistance value of the MCP4011. This allows each
increment or decrement in the MCP4011 to be a fine
adjustment of the offset voltage. The input voltage of
the op amp (V
voltage. The gain is adjusted by the MCP4012. If the
resistance value of the MCP4012 is small compared to
the resistance value of R3, then this is a fine adjust-
ment of the gain. If the resistance value of the
MCP4012 is equal (or large) compared to the resis-
tance value of R3, then this is a course adjustment of
the gain. In general, trim the course adjustments first
and then trim the fine adjustments.
FIGURE 8-3:
an Inverting Amplifier.
DS21978A-page 44
V
IN
R
R
1
2
A
B
V
Operational Amplifier
Applications
DD
R
3
W
IN
) should be centered at the op amps Vw
MCP4011
A
W
Trimming Offset and Gain in
B
Op Amp
+
–
MCP6001
R
4
V
OUT
FIGURE 8-4:
a Non-Inverting Amplifier.
FIGURE 8-5:
Thevenin
Equivalent
R
R
1
2
A
B
V
R
R
DD
1
2
MCP4011
A
B
V
W
DD
R
3
R
W
V
Pot
Eq
IN
Pot
1
V
=
MCP4011
IN
2
A
W
R
V
A
MCP4012
W
1
Trimming Offset and Gain in
+
Programmable Filter.
© 2005 Microchip Technology Inc.
B
R
AB
W
Op Amp
+
–
–
f
R
c
Op Amp
WB
V
–
+
=
R
DD
3
-----------------------------
2
R
MCP6021
4
R
R
MCP6291
1
Eq
2
+
R
C
WB
V
V
OUT
OUT
+
R
w