Table 122. ADC Characteristics, Differential channels, TA = -40°C to 85°C
Symbol Parameter
Condition
Gain = 1x
Min
Typ
Max
10
Units
Bits
Resolution
Gain = 10x
Gain = 200x
10
Bits
10
Bits
Gain = 1x
VREF = 4V, VCC = 5V
ADC clock = 50 - 200 kHz
17
16
LSB
LSB
LSB
LSB
LSB
LSB
Gain = 10x
VREF = 4V, VCC = 5V
ADC clock = 50 - 200 kHz
Absolute Accuracy
Gain = 200x
VREF = 4V, VCC = 5V
7
ADC clock = 50 - 200 kHz
Gain = 1x
VREF = 4V, VCC = 5V
ADC clock = 50 - 200 kHz
0.75
0.75
2
Integral Non-Linearity (INL)
(Accuracy after calibration for Offset and
Gain Error)
Gain = 10x
VREF = 4V, VCC = 5V
ADC clock = 50 - 200 kHz
Gain = 200x
VREF = 4V, VCC = 5V
ADC clock = 50 - 200 kHz
Gain = 1x
1.6
1.5
0.2
ꢀ
ꢀ
ꢀ
Gain Error
Gain = 10x
Gain = 200x
Gain = 1x
VREF = 4V, VCC = 5V
ADC clock = 50 - 200 kHz
1
LSB
LSB
LSB
Gain = 10x
Offset Error
VREF = 4V, VCC = 5V
1.5
4.5
ADC clock = 50 - 200 kHz
Gain = 200x
VREF = 4V, VCC = 5V
ADC clock = 50 - 200 kHz
Clock Frequency
50
65
200
260
kHz
µs
V
Conversion Time
AVCC
VREF
VIN
Analog Supply Voltage
Reference Voltage
Input voltage
VCC - 0.3(1)
VCC + 0.3(2)
AVCC - 0.5
AVCC
2.0
V
GND
V
VDIFF
Input differential voltage
ADC conversion output
Input bandwith
-VREF/Gain
-511
VREF/Gain/
511
V
LSB
kHz
4
294
ATmega32(L)
2503J–AVR–10/06
ATMEL [ ATMEL ]
