AT90USB64/128
30.9 ADC Characteristics – Preliminary Data
Table 30-5. ADC Characteristics
Symbol
Parameter
Condition
Min(1)
Typ(1)
Max(1)
Units
Single Ended Conversion
10
Bits
Differential Conversion
Gain = 1x or 20x
8
7
Bits
Bits
Resolution
Differential Conversion
Gain = 200x
Single Ended Conversion
VREF = 4V, VCC = 4V,
ADC clock = 200 kHz
2
2.5
LSB
LSB
Single Ended Conversion
VREF = 4V, VCC = 4V,
4.5
ADC clock = 1 MHz
Absolute accuracy (Including
INL, DNL, quantization error,
gain and offset error)
Single Ended Conversion
VREF = 4V, VCC = 4V,
2
LSB
LSB
ADC clock = 200 kHz
Noise Reduction Mode
Single Ended Conversion
VREF = 4V, VCC = 4V,
ADC clock = 1 MHz
4.5
Noise Reduction Mode
Single Ended Conversion
VREF = 4V, VCC = 4V,
ADC clock = 200 kHz
Integral Non-Linearity (INL)
Differential Non-Linearity (DNL)
Gain Error
0.5
0.25
2
LSB
LSB
LSB
LSB
Single Ended Conversion
VREF = 4V, VCC = 4V,
ADC clock = 200 kHz
Single Ended Conversion
V
REF = 4V, VCC = 4V,
ADC clock = 200 kHz
Single Ended Conversion
Offset Error
VREF = 4V, VCC = 4V,
2
ADC clock = 200 kHz
Conversion Time
Free Running Conversion
Single Ended Conversion
13
50
260
1000
µs
kHz
V
Clock Frequency
AVCC
VREF
Analog Supply Voltage
VCC - 0.3
1.0
VCC + 0.3
AVCC
Single Ended Conversion
Differential Conversion
Single ended channels
Differential Conversion
Single Ended Channels
Differential Channels
1.1V
V
Reference Voltage
Input Voltage
1.0
AVCC - 0.5
VREF
V
GND
0
V
VIN
AVCC
V
38,5
4
kHz
kHz
V
Input Bandwidth
VINT1
Internal Voltage Reference
1.0
1.1
1.2
407
7593A–AVR–02/06
ATMEL [ ATMEL ]
