ADuCM361BCPZ128 datasheet(6/24 Pages) AD

Part #	ADuCM361BCPZ128

Description	Low Power, Precision Analog Microcontroller with Dual Sigma-Delta ADCs, ARM Cortex-M3

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ADuCM360/ADuCM361

Data Sheet

Rev. B | Page 6 of 24

SPECIFICATIONS

MICROCONTROLLER ELECTRICAL SPECIFICATIONS

AVDD/IOVDD = 1.8 V to 3.6 V, internal 1.2 V reference, fCORE = 16 MHz, all specifications at TA = −40°C to +125°C, unless otherwise noted.

Table 1.

Parameter

Test Conditions/Comments

Min

Typ

Max

Unit

ADC SPECIFICATIONS

ADC0 and ADC1

Conversion Rate1

Chop off

3.5

3906

Hz

Chop on

3.5

1302

Hz

No Missing Codes1

Chop off, fADC ≤ 500 Hz

24

Bits

Chop on, fADC ≤ 250 Hz

24

Bits

RMS Noise and Data Output Rates

See Table 2 through Table 9

Integral Nonlinearity1

Gain = 1, input buffer off

±10

ppm of FSR

Gain = 2, 4, 8, or 16

±15

ppm of FSR

Gain = 32, 64, or 128

±20

ppm of FSR

Offset Error2, 3, 4, 6, 7

Chop off; offset error is in the order of

the noise for the programmed gain and

update rate following calibration

±100/gain

μV

Chop on1

±1.0

μV

Offset Error Drift vs. Temperature1, 4, 6

Chop off, gain ≤ 4

1/gain

μV/°C

Chop off, gain ≥ 8

230

nV/°C

Chop on

10

nV/°C

Offset Error Lifetime Stability5

Gain = 128

1

μV/1000Hr

Full-Scale Error1, 4, 6, 7, 8

±0.5/gain

mV

Full-Scale Error Lifetime Stability5

Gain = 128

70

μV/1000Hr

Gain Error Drift vs. Temperature1, 4, 6

External reference

Gain = 1, 2, 4, 8, or 16

±3

ppm/°C

Gain = 32, 64, or 128

±6

ppm/°C

PGA Gain Mismatch Error

±0.15

%

Power Supply Rejection1

External reference

Chop on, ADC input = 0.25 V, gain = 4

95

dB

Chop off, ADC input = 7.8 mV, gain = 128

80

dB

Chop off, ADC input = 1 V, gain = 1

90

dB

Absolute Input Voltage Range

Unbuffered Mode

AGND

AVDD

V

Buffered Mode

Gain = 1 is not available; see the infor-

mation about silicon anomalies on the

ADuCM360/ADuCM361 product page

Gain ≥ 2

AGND + 0.1

AVDD − 0.1

V

Differential Input Voltage Ranges1

For gain = 32, 64, and 128, see Table 3

and Table 7 for allowable input ranges

and noise values

Gain = 1

±VREF

V

Gain = 2

±500

mV

Gain = 4

±250

mV

Gain = 8

±125

mV

Gain = 16

±62.5

mV

Common-Mode Voltage, VCM1

Ideally, VCM = ((AIN+) + (AIN−))/2; gain =

2 to 128; input current varies with VCM

(see Figure 9 and Figure 10)

AGND

AVDD

V

Input Current9

Buffered Mode

Gain > 1 (excluding AIN4, AIN5, AIN6,

and AIN7 pins)

1

nA

Gain > 1 (AIN4, AIN5, AIN6, and AIN7 pins)

2

nA

Unbuffered Mode

Input current varies with input voltage

500

nA/V

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