Datasheet
ADuC7033
Rev. B | Page 5 of 140
Parameter Test Conditions/Comments Min Typ Max Unit
Total Gain Error
1, 3, 7, 13, 14
Includes resistor mismatch −0.25 ±0.06 +0.25 %
Temperature range = −25°C to +65°C −0.15 ±0.03 +0.15 %
Gain Drift Includes resistor mismatch drift ±3 ppm/°C
Output Noise
1, 10, 15
4 Hz update rate, chop enabled 60 90 µV rms
10 Hz update rate, chop enabled 60 90 µV rms
1 kHz update rate, chop disabled 180 270 µV rms
1 kHz update rate, chop enabled 240 307 µV rms
1 kHz update rate (ADCFLT = 0x0101) 270 405 µV rms
8 kHz update rate 1600 2400 µV rms
Temperature Channel
No Missing Codes
1
Valid at all ADC update rates 16 Bits
Integral Nonlinearity
1
±10 ±60 ppm of FSR
Offset Error
3, 5, 16, 17
Chop off, 1 LSB = 19.84 V (in unipolar mode) −10 ±3 +10 LSB
Offset Error
1, 3
Chop on −5 ±1 +5 LSB
Offset Error Drift Chop off ±0.03 LSB/°C
Total Gain Error
1, 3, 13
Using AVDD/2 for reference −0.2 ±0.06 +0.2 %
Gain Drift ±3 ppm/°C
Output Noise
1
1 kHz update rate 7.5 11.25 µV rms
ADC SPECIFICATIONS ANALOG
INPUT
Internal V
REF
= 1.2 V
Current Channel
Absolute Input Voltage Range Applies to both IIN+ and IIN− −200 +300 mV
Input Voltage Range
18, 19
Gain = 1
20
±1.2 V
Gain = 2
20
±600 mV
Gain = 4
20
±300 mV
Gain = 8 ±150 mV
Gain = 16 ±75 mV
Gain = 32 ±37.5 mV
Gain = 64 ±18.75 mV
Gain = 128 ±9.375 mV
Gain = 256 ±4.68 mV
Gain = 512 ±2.3 mV
Input Leakage Current
1
−3 +3 nA
Input Offset Current
1, 21
0.5 1.5 nA
Voltage Channel
Absolute Input Voltage Range 4 18 V
Input Voltage Range 0 to 28.8 V
VBAT Input Current VBAT = 18 V 3 5.5 8 µA
Temperature Channel V
REF
= (REG_AVDD, GND_SW)/2
Absolute Input Voltage Range 100 1300 mV
Input Voltage Range 0 to V
REF
V
VTEMP Input Current
1
2.5 100 nA
VOLTAGE REFERENCE
ADC Precision Reference
Internal V
REF
1.2 V
Power-Up Time
1
0.5 Ms
Initial Accuracy
1
Measured at T
A
= 25°C −0.15 +0.15 %
Temperature Coefficient
1, 22
−20 ±5 +20 ppm/°C
Reference Long-Term Stability
23
100 ppm/1000 hr
External Reference Input Range
24
0.1 1.3 V
V
REF
Divide-by-2 Initial Error
1
0.1 0.3 %