Datasheet

121XMEGA A4U [DATASHEET]
Atmel-8387G-AVR-ATxmega16A4U-34A4U-64A4U-128A4U-Datasheet_03/2014
Table 36-74. Accuracy characteristics.
Notes: 1. Maximum numbers are based on characterisation and not tested in production, and valid for 5% to 95% input voltage range.
2. Unless otherwise noted all linearity, offset and gain error numbers are valid under the condition that external V
REF
is used.
Table 36-75. Gain stage characteristics.
Symbol Parameter Condition
(2)
Min. Typ. Max. Units
RES Resolution Programmable to 8 or 12 bit 8 12 12 Bits
INL
(1)
Integral non-linearity
500ksps
V
CC
-1.0V < V
REF
< V
CC
-0.6V ±1.2 ±2
lsb
All V
REF
±1.5 ±3
2000ksps
V
CC
-1.0V < V
REF
< V
CC
-0.6V ±1.0 ±2
All V
REF
±1.5 ±3
DNL
(1)
Differential non-linearity guaranteed monotonic <±0.8 <±1 lsb
Offset error
-1 mV
Temperature drift <0.01 mV/K
Operating voltage drift <0.6 mV/V
Gain error
Differential
mode
External reference -1
mV
AV
CC
/1.6 10
AV
CC
/2.0 8
Bandgap ±5
Temperature drift <0.02 mV/K
Operating voltage drift <0.5 mV/V
Noise
Differential mode, shorted input
2msps, V
CC
= 3.6V, Clk
PER
= 16MHz
0.4
mV
rms
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 V
CC
- 0.6 V
Propagation delay ADC conversion rate 1.0
Clk
ADC
cycles
Sample rate Same as ADC 100 1000 kHz
INL
(1)
Integral non-linearity 500ksps
All gain
settings
±1.5 ±4.0 lsb
Gain error
1x gain, normal mode -0.8
%8x gain, normal mode -2.5
64x gain, normal mode -3.5