Datasheet

397
7593L–AVR–09/12
AT90USB64/128
31.9 ADC characteristics
Table 31-5. ADC characteristics.
Symbol Parameter Condition Min. Typ. Max. Units
Resolution
Single Ended Conversion 10
Bits
Differential Conversion
Gain = 1× or 10×
8
Differential Conversion
Gain = 200×
7
Absolute accuracy (Including
INL, DNL, quantization error,
gain and offset error)
Single Ended Conversion
V
REF
= 4V, V
CC
= 4V,
ADC clock = 200kHz
1.5
LSB
Single Ended Conversion
V
REF
= 4V, V
CC
= 4V,
ADC clock = 1MHz
Single Ended Conversion
V
REF
= 4V, V
CC
= 4V,
ADC clock = 200kHz
Noise Reduction Mode
1.5
Single Ended Conversion
V
REF
= 4V, V
CC
= 4V,
ADC clock = 1MHz
Noise Reduction Mode
Absolute accuracy
Gain = 1×, 10×, 200×
V
REF
= 4V, V
CC
= 5V
ADC Clock = 50 - 200kHz
1
Integral Non-Linearity (INL)
Single Ended Conversion
V
REF
= 4V, V
CC
= 4V,
ADC clock = 200kHz
0.5 1
Integral Non-Linearity (INL)
(Accuracy after calibration for
offset and gain error)
Gain = 1×, 10×, 200×
V
REF
= 4V, V
CC
= 5V
ADC Clock = 50 - 200kHz
0.5 1
Differential Non-Linearity (DNL)
Single Ended Conversion
V
REF
= 4V, V
CC
= 4V,
ADC clock = 200kHz
0.3 1
Gain Error
Single Ended Conversion
V
REF
= 4V, V
CC
= 4V,
ADC clock = 200kHz
-2 0 +2
Gain = 1×, 10×, 200× -2 0 +2
Offset Error
Single Ended Conversion
V
REF
= 4V, V
CC
= 4V,
ADC clock = 200kHz
-2 1 +2
Gain = 1×, 10×, 200×
V
REF
= 4V, V
CC
= 5V
ADC Clock = 50 - 200kHz
-1 0 +1
Conversion Time Free Running Conversion 65 260 µs
Clock Frequency Single Ended Conversion 50 1000 kHz