Table 26-5. ADC Characteristics - TA = -40°C to +105°C, VCC = 2.7V to 5.5V (unless otherwise noted) (Continued)
Symbol
Parameter
Condition
Min
Typ
Max
Units
Single Ended Conversion
VCC = 4.5V, VREF = 4V
ADC clock = 1MHz
-4
0
LSB
Single Ended Conversion
VCC = 4.5V, VREF = 4V
ADC clock = 500 kHz
-2
2.5
-0.5
-0.5
LSB
LSB
LSB
Zero Error (Offset)
Differential Conversion
VCC = 4.5V, VREF = 4V
-0.5
-0.5
ADC clock = 1MHz
Differential Conversion
VCC = 4.5V, VREF = 4V
ADC clock = 500 kHz
Conversion Time
Single Conversion
8
50
320
2000
µs
kHz
V
Clock Frequency
AVCC
VREF
VIN
Analog Supply Voltage
VCC - 0.3
2.0
VCC + 0.3
AVCC
Single Ended Conversion
Differential Conversion
Single Ended Conversion
Differential Conversion
Single Ended Conversion
Differential Conversion
V
Reference Voltage
Input voltage
2.0
AVCC - 0.2
VREF
V
GND
-VREF/Gain
+VREF/Gain
38.5
4(2)
kHz
kHz
V
Input bandwidth
VINT
RREF
RAIN
Internal Voltage Reference
Reference Input Resistance
Analog Input Resistance
2.52
2.56
30
2.6
kΩ
MΩ
100
High Speed Mode
Increased Current
Consumption
IHSM
380
µA
Single Ended Conversion
Notes: 1. On AT90PWM2B/3B, this value will be close to the value at 500kHz.
2. 125KHz when input signal is synchronous with amplifier clock.
306
AT90PWM2/3/2B/3B
4317J–AVR–08/10
ATMEL [ ATMEL ]
