Atmel AVR AT90CAN128, Manual

Page: 374 / 428

374
7679H–CAN–08/08
AT90CAN32/64/128
Notes: 1. Values are guidelines only.
2. Minimum for AV
CC
is 2.7 V.
3. Maximum for AV
CC
is 5.5 V
Table 26-6. ADC Characteristics, Differential Channels
Symbol Parameter Condition Min
(1)
Typ
(1)
Max
(1)
Units
Resolution
Differential Conversion
Gain = 1x or 10x
8 Bits
Differential Conversion
Gain = 200x
7 Bits
Absolute accuracy
Gain = 1x, 10x or 200x
V
REF
= 4V, Vcc = 5V
ADC clock = 50 - 200 kHz
1 LSB
Integral Non-linearity (INL)
(Accuracy after Calibration
for Offset and Gain Error) Gain = 1x, 10x or 200x
V
REF
= 4V, Vcc = 5V
ADC clock = 50 - 200 kHz
0.5 1 LSB
Gain Error Gain = 1x, 10x or 200x – 2 0 + 2 LSB
Offset Error
Gain = 1x, 10x or 200x
V
REF
= 4V, Vcc = 5V
ADC clock = 50 - 200 kHz
– 1 0 + 1 LSB
Clock Frequency Free Running Conversion 50 200 kHz
Conversion Time Free Running Conversion 65 260 µs
AV
CC
Analog Supply Voltage V
CC
– 0.3
(2)
V
CC
+ 0.3
(3)
V
V
REF
External Reference Voltage Differential Conversion 2.0 AV
CC - 0.5
V
V
IN
Input voltage Differential Conversion 0 AV
CC
V
V
DIFF
Input Differential Voltage –V
REF
/Gain +V
REF
/Gain V
ADC Conversion Output –511 511 LSB
Input bandwidth Differential Conversion 4 kHz
V
INT
Internal Voltage Reference 2.4 2.56 2.7 V
R
REF
Reference Input Resistance 32 k
Ω
R
AIN
Analog Input Resistance 100 M
Ω