ADuCM330/ADuCM331

Data Sheet

Rev. C | Page 4 of 16

SPECIFICATIONS

Parameters not specified in the 115°C to 125°C temperature range of operation are functional within this range but with degraded performance

Table 1.

+125°C1

Parameter

Test Conditions/Comments

Min

Typ

Max

Typ

Unit

ADC SPECIFICATIONS

Conversion Rate1

ADC normal operating mode

4

8000

Hz

ADC low power mode, chop on

1

656

Hz

Current Channel (IIN+/IIN− Only)

No Missing Codes1

Valid for all ADC update rates and

ADC modes

20

Bits

Integral Nonlinearity1,2

±10

±200

±80

ppm of FSR

Positive Integral

Nonlinearity (INL)1,2,3

±200

±80

ppm of FSR

Negative INL1,2,3

±200

±80

ppm of FSR

Offset Error1,4, 5

Chop off, gain = 4, 8, or 16, external

short, after user system calibration at

25°C, 1 LSB = (2.28/gain) μV

−100

±24

+100

LSBs

Chop off, gain = 32 or 64, external

short, after user system calibration at

25°C, 1 LSB = (2.28/gain) μV

−160

±48

+160

LSBs

Chop off, gain = 512, external short,

after user system calibration at 25°C,

1 LSB = (2.28/gain) μV

−1400

±60

+1400

LSBs

Chop on, external short, low power

mode, gain = 64 or 512, processor

powered down

−300

±50

+250

±250

nV

Chop on, external short, after user

system calibration at 25°C, VDD = 18 V

−1.5

+1.5

±0.1

μV

Offset Error Drift1,2,6

Chop off, gains of 4 to 64, normal mode

±0.48

LSB/°C

Chop on

±5

±5

nV/°C

Total Gain Error1,4, 5,7

Factory calibrated at a gain of 8,

normal mode

−0.5

±0.1

+0.5

±0.15

%

Low power mode

−1

±0.2

+1

±0.2

%

Gain Drift1,8

±3

±3

ppm/°C

PGA Gain Mismatch Error

±0.1

±0.1

%

Output Noise1

ADC0CON[11:10], PGASCALE = 0x3

Gain = 64, ADCFLT = 0x08101

0.80

1.3

1.2

μV rms

Gain = 64, ADCFLT = 0x00007

0.75

1.1

μV rms

Gain = 32, ADCFLT = 0x08101

1.00

1.5

1.3

μV rms

Gain = 32, ADCFLT = 0x00007

0.80

1.2

μV rms

Gain = 16, ADCFLT = 0x08101

1.50

2.6

2.0

μV rms

Gain = 16, ADCFLT = 0x00007

1.10

1.9

μV rms

Gain = 8, ADCFLT = 0x08101

2.10

4.1

2.5

μV rms

Gain = 8, ADCFLT = 0x00007

1.60

2.4

μV rms

Gain = 4, ADCFLT = 0x08101

3.40

5.1

4.0

μV rms

Gain = 4, ADCFLT = 0x00007

2.60

3.9

μV rms

Gain = 64, ADCFLT = 0x10001

1.60

3

2.0

μV rms

Gain = 32, ADCFLT = 0x10001

1.70

3.45

2.1

μV rms

Gain = 16, ADCFLT = 0x10001

2.00

4.2

2.2

μV rms

Gain = 8, ADCFLT = 0x10001

2.40

5.1

3.2

μV rms

Gain = 4, ADCFLT = 0x10001

4.35

9.6

5.5

μV rms

ADC low power mode, 221 Hz update

rate, chop enabled, gain = 64

0.6

0.9

0.8

μV rms