Datasheet

79
XMEGA B3 [DATASHEET]
8074D–AVR–08/2013
Notes: 1. Maximum numbers are based on characterisation and not tested in production, and valid for 10% to 90% input voltage range.
2. Unless otherwise noted all linearity, offset and gain error numbers are valid under the condition that external VREF is used.
Table 36-12. Gain stage characteristics.
Gain Error Differential mode
External reference -5
mV
AVCC/1.6 -5
AVCC/2.0 -6
Bandgap ±10
Temperature drift 0.02 mV/K
Operating voltage drift 2 mV/V
Gain Error
Single ended
unsigned mode
External reference -8
mV
AVCC/1.6 -8
AVCC/2.0 -8
Bandgap ±10
Temperature drift 0.03 mV/K
Operating voltage drift 2 mV/V
Symbol Parameter Condition
(2)
Min. Typ. Max. Units
Symbol Parameter Condition Min. Typ. Max. Units
R
in
Input resistance Switched in normal mode 4.0 k
C
sample
Input capacitance Switched in normal mode 4.4 pF
Signal range Gain stage output 0 AV
CC
- 0.6 V
Propagation delay ADC conversion rate 1/2 1 3
Clk
ADC
cycles
Clock rate Same as ADC 100 1800 kHz
Gain error
0.5x gain, normal mode -1
%
1x gain, normal mode -1
8x gain, normal mode -1
64x gain, normal mode 10
Offset error,
input referred
0.5x gain, normal mode 10
mV
1x gain, normal mode 5
8x gain, normal mode -20
64x gain, normal mode -126