MCP4452-503E/ST Microchip Technology, MCP4452-503E/ST Datasheet - Page 16

• Manufacturer Part Number: MCP4452-503E/ST
• Description: IC RHEO 50K QUAD 8BIT 14TSSOP
• Manufacturer: Microchip Technology

Specifications of MCP4452-503E/ST

• Package / Case: 14-TSSOP (0.173", 4.40mm Width)
• Resistance (ohms): 50K
• Taps: 257
• Number Of Circuits: 4
• Temperature Coefficient: *
• Memory Type: Volatile
• Interface: I²C, 2-Wire Serial
• Voltage - Supply: 1.8 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Number Of Pots: Quad
• Taps Per Pot: 257
• Resistance: 50 KOhms
• Wiper Memory: Volatile
• Digital Interface: I2C
• Operating Supply Voltage: 1.8 V to 5.5 V
• Supply Current: 600 uA
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 1.8 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Digital Potentiometer Solutions
Resistance Options and Resolutions
Microchip offers Digital Potentiometer devices with typical
R
KΩ. The devices offer either 6-, 7- or 8-bits of resolution.
The step resistance (R
the number of R
The step resistance is important to understand when
you are using the device in a rheostat mode, or the
potentiometer is being windowed by resistors on the
Terminal A and/or on the Terminal B.
Voltage Windowing
Terminal A and Terminal B may for example be any
voltage within the device specification limits. Lets call the
voltages at these nodes V
the resistor R
determined by the values of the R1, R2 and R
As the V
range, the effective resolution of the device increase,
though the resolution is limited to between the V
voltages.
This allows a less precise device to be used for more
precise circuit tuning over a narrower range. When
replacing a mechanical potentiometer, this configuration
can be used and R1 and R2 may be any resistance
(including 0).
Resistance Options
How the V
5.00
2.50
1.25
R
2100
5000
10000
50000
100000
AB
AB
16
V
resistances of 2.1 KΩ, 5 KΩ, 10 KΩ, 50 KΩ and 100
AB
AB
AB
Voltage Effects the Effective Resolution
voltage becomes smaller relative to the voltage
6-bit (63)
79.4E
39.7E
19.8E
AB
S
(V
resistors in the R
AB
Digital Potentiometer Design Guide
) is | V
S
7-bit (127)
) is the R
33.33333333
79.36507937
158.7301587
793.6507937
39.4E
19.7E
6-bit (63)
A
9.8E
A
and V
- V
mV per Step
–
B
|. The V
AB
B
. So the voltage across
AB
resistances divided by
7-bit (128)
39.1E
19.5E
ladder.
9.8E
AB
voltage is
AB
8-bit (256)
resistors.
A
19.5E
and V
39.37007874
78.74015748
393.7007874
787.4015748
9.8E
4.9E
7-bit (127)
B
–
6-bit (63)
6-bit
7-bit
8-bit
Voltage Windowing
Effective V
7-bit (127)
7-bit
8-bit
9-bit
AB
7-bit (128)
Resolution vs. Fixed V
39.0625
390.625
78.125
781.25
–
7-bit (128)
7-bit
8-bit
9-bit
8-bit (256)
DD
10-bit
8-bit
9-bit
8-bit (256)
19.53125
195.3125
39.0625
390.625
–
V
V
Comment
V
DD
DD
AB
= 5.0V
= 5.0V
= V
DD