ADUCM331WFS datasheet(5/17 Pages) AD

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Data Sheet

ADuCM330WFS/ADuCM331WFS

Rev. A | Page 5 of 17

SPECIFICATIONS

VDD = 3.6 V to 19 V, Arm core frequency (fCORE) = 16.384 MHz, clock divider bits (CD) = 0, normal mode, and voltage reference (VREF) = 1.2 V

(internal), unless otherwise stated. Typical values noted reflect the approximate parameter mean at TA = 25°C under nominal conditions, unless

otherwise stated. Safe operation of the device is not guaranteed outside the temperature range of TA = −40°C to +115°C. Parameters specified in

the 115°C to 125°C temperature range of operation are functional within this range but with degraded performance.

Table 1.

TA = −40°C to +115°C

TA = +115°C to +125°C1

Parameter

Test Conditions/Comments

Min

Typ

Max

Min

Typ

Max

Unit

ADC SPECIFICATIONS

Conversion Rate1

ADC normal operating mode, chop off

8000

ADC normal operating mode, chop on

2000

ADC low power mode, chop on

656

Current Channel

(IIN+/IIN− Only)

No Missing Codes1

Valid for all ADC update rates and ADC

modes

Bits

Integral

Nonlinearity

(INL)1,2

ADCFLT = 0x10001, 0x08101, 0x00007

−200

±10

+200

±80

ppm of

FSR

Offset Error1,3, 4

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

Chop on, external short, after user

system calibration at 25°C, VDD = 19 V

−0.65

+0.65

±0.1

µV

Offset Error Drift1,2,5

Chop off, gain of 4 to 64, normal mode

±0.48

LSB/°C

Chop on

±5

nV/°C

Total Gain Error1,3,4,6

Factory calibrated at a gain of 8, normal

mode

−0.5

±0.1

+0.5

±0.15

Low power mode

−1

±0.2

Gain Drift1,7

±3

ppm/°C

PGA Gain Mismatch

Error

±0.1

Output Noise1,8

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

1.55

2.0

1.85

µV rms

Gain = 32, ADCFLT = 0x10001

1.6

2.3

2.0

µV rms

Gain = 16, ADCFLT = 0x10001

1.8

2.5

2.1

µV rms

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