Datasheet

ADuC7033
Rev. B | Page 4 of 140
SPECIFICATIONS
ELECTRICAL SPECIFICATIONS
VDD = 3.5 V to 18 V, VREF = 1.2 V internal reference, f
CORE
= 10.24 MHz driven from external 32.768 kHz watch crystal or on-chip
precision oscillator, all specifications T
A
= −40°C to +115°C, unless otherwise noted.
Table 1. ADuC7033 Electrical Specifications
Parameter Test Conditions/Comments Min Typ Max Unit
ADC SPECIFICATIONS
Conversion Rate
1
Chop off, ADC normal operating mode 4 8000 Hz
Chop on, ADC normal operating mode 4 2600 Hz
Chop on, ADC low power mode 1 650 Hz
Current Channel
No Missing Codes
1
Valid for all ADC update rates and ADC modes 16 Bits
Integral Nonlinearity
1, 2
±10 ±60 ppm of FSR
Offset Error
2, 3, 4, 5
Chop off, 1 LSB = (36.6/gain) V −10 ±3 +10 LSB
Offset Error
1, 3, 6
Chop on −2 ±0.5 +2 V
Offset Error
1, 3
Chop on, low power or low power plus mode,
MCU powered down
0 −200 −650 nV
Offset Error
1, 3
Chop on, normal mode, CD = 1 0 −1.5 −5 V
Offset Error Drift
6
Chop off, valid for ADC gains of 4 to 64, normal mode ±0.03 LSB/°C
Chop off, valid for ADC gains of 128 to 512,
normal mode
±30 nV/°C
Chop on ±10 nV/°C
Total Gain Error
1, 3, 7, 8, 9
Normal mode −0.5 ±0.1 +0.5 %
Total Gain Error
1, 3, 7, 9
Low power mode, using ADCREF MMR −4 ±0.2 +4 %
Total Gain Error
1, 3, 7, 9
Low power plus mode, using precision V
REF
−1 ±0.2 +1 %
Gain Drift ±3 ppm/°C
PGA Gain Mismatch Error ±0.1 %
Output Noise
1, 10, 11
4 Hz update rate, gain = 512, chop enabled 60 90 nV rms
4 Hz update rate, gain = 512, chop disabled 75 115 nV rms
10 Hz update rate, gain = 512, chop enabled 100 150 nV rms
10 Hz update rate, gain = 512, chop disabled 120 180 nV rms
1 kHz update rate, gain ≥ 64, chop enabled 0.8 1.2 µV rms
1 kHz update rate, gain ≥ 64, chop disabled 1 1.5 µV rms
1 kHz update rate, gain = 512 0.6 0.9 µV rms
1 kHz update rate, gain = 32 0.8 1.2 µV rms
1 kHz update rate, gain = 8, chop enabled 2.1 4.1 µV rms
1 kHz update rate, gain = 8, chop disabled 1.6 2.4 µV rms
1 kHz update rate, gain = 8 (ADCFLT = 0x0101) 2.6 3.9 µV rms
1 kHz update rate, gain = 4 2.0 2.8 µV rms
8 kHz update rate, gain = 32 2.5 3.5 µV rms
8 kHz update rate, gain = 4 14 21 µV rms
ADC low power mode, f
ADC
= 10 Hz, gain = 128 1.25 1.9 µV rms
ADC low power mode, f
ADC
= 1 Hz, gain = 128 0.35 0.5 µV rms
ADC low power plus mode, f
ADC
= 1 Hz, gain = 512 0.1 0.15 µV rms
Voltage Channel
12
No Missing Codes
1
Valid at all ADC update rates 16 Bits
Integral Nonlinearity
1
±10 ±60 ppm of FSR
Offset Error
3, 5
Chop off, 1 LSB = 439.5 µV −10 ±1 +10 LSB
Offset Error
1, 3
Chop on −1 ±0.3 +1 LSB
Offset Error Drift Chop off ±0.03 LSB/°C