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MCP3422A3-E/ST

18-Bit, Multi-Channel ΔΣ Analog-to-Digital Converter with I2C™ Interface and On-Board Reference

Microchip Technology 

MCP3422/3/4

2.0 TYPICAL PERFORMANCE CURVES

Note:

The graphs and tables provided following this note are a statistical summary based on a limited number of

samples and are provided for informational purposes only. The performance characteristics listed herein

are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified

operating range (e.g., outside specified power supply range) and therefore outside the warranted range.

Note: Unless otherwise indicated, TA = -40°C to +85°C, VDD = +5.0V, VSS = 0V, CHn+ = CHn- = VREF/2,

VINCOM = VREF/2.

0.0035

0.003

0.0025

0.002

0.0015

0.001

0.0005

0

2.5

TA = +25°C

PGA = 8

PGA = 4

PGA = 2

PGA = 1

3 3.5 4 4.5 5 5.5

VDD (V)

FIGURE 2-1:

(VDD).

INL vs. Supply Voltage

8

7

6

5

4

3

2

1

0

-100 -75

PGA = 8

TA = +25°C

PGA = 1

PGA = 4

PGA = 2

-50 -25 0 25 50

Input Signal (% of FSR)

75 100

FIGURE 2-4:

Voltage.

Output Noise vs. Input

0.0035

PGA = 1

0.003

0.0025

0.002

2.7V

0.0015

0.001

5V

0.0005

0

5.5V

-60 -40 -20 0 20 40 60 80 100 120 140

Temperature (oC)

FIGURE 2-2:

INL vs. Temperature.

2

PGA = 1

1.5

PGA = 8

1

TA = +25°C

0.5

0

-0.5

PGA = 4

PGA = 2

-1

-1.5

-2

-100 -75 -50 -25 0 25 50 75 100

Input Voltage (% of Full-Scale)

FIGURE 2-5:

Total Error vs. Input Voltage.

20

15

10

5

0

-5

-10

-15

-20

-60 -40 -20

PGA = 4

PGA = 8

PGA = 2

PGA = 1

0 20 40 60 80 100 120 140

Temperature (°C)

FIGURE 2-3:

Temperature.

Offset Error vs.

0.2

0.1

0

PGA = 8

PGA = 1

-0.1

-0.2

-0.3

-0.4

-0.5

-0.6

-60 -40 -20

PGA = 2

PGA = 4

0 20 40 60 80 100 120 140

Temperature (°C)

FIGURE 2-6:

Gain Error vs. Temperature.

© 2009 Microchip Technology Inc.

DS22088C-page 9

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