ADuCM362/ADuCM363 Data Sheet
Rev. 0| Page 6 of 24
SPECIFICATIONS
MICROCONTROLLER ELECTRICAL SPECIFICATIONS
AVDD/IOVDD = 1.8 V to 3.6 V, internal 1.2 V reference, f
CORE
= 16 MHz, all specifications at T
A
= −40°C to +125°C, unless otherwise noted.
Table 1.
Parameter Test Conditions/Comments Min Typ Max Unit
ADC SPECIFICATIONS ADC0 and ADC1
Conversion Rate
1
Chop off 3.5 3906 Hz
Chop on 3.5 1302 Hz
No Missing Codes
1
Chop off, f
ADC
≤ 500 Hz 24 Bits
Chop on, f
ADC
≤ 250 Hz 24 Bits
RMS Noise and Data Output Rates See Table 2 through Table 9
Integral Nonlinearity
1
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 Error
2, 3, 4, 6, 7
Chop off; offset error is in the order of
the noise for the programmed gain and
update rate following calibration
±230/gain V
Chop on
1
±1.0 V
Offset Error Drift vs. Temperature
1, 4, 6
Chop off, gain ≤ 4 1/gain V/°C
Chop off, gain ≥ 8 230 nV/°C
Chop on 10 nV/°C
Offset Error Lifetime Stability
5
Gain = 128 1 V/1000 Hr
Full-Scale Error
1, 4, 6, 7, 8
±0.5/gain mV
Full-Scale Error Lifetime Stability
5
Gain = 128 70 V/1000 Hr
Gain Error Drift vs. Temperature
1, 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 Rejection
1
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
Available for all gain settings G = 1 to 128 AGND + 0.1 AVDD − 0.1 V
Differential Input Voltage Ranges
1
For gain = 32, 64, and 128, see Table 3
and Table 7 for allowable input ranges
and noise values
Gain = 1 ±V
REF
V
Gain = 2 ±500 mV
Gain = 4 ±250 mV
Gain = 8 ±125 mV
Gain = 16 ±62.5 mV
Common-Mode Voltage, V
CM
1
Ideally, V
CM
= ((AIN+) + (AIN−))/2; gain = 2
to 128; input current varies with V
CM
(see Figure 9 and Figure 10)
AGND AVDD V
