44.4.5 Analog-to-Digital Converter (ADC) Accuracy Specifications(1)

Table 44-11. 

Standard Operating Conditions (unless otherwise stated)

VDD = 3.0V, TA = 25°C, TAD = 1 μs, FOSC ≤ 8 MHz, ADCVREF = VDD/VSS, Differential Mode

Param No. Sym. Characteristic Min. Typ. † Max. Units Conditions
AD01 NR Resolution — — 12 bit
AD02 EIL Integral Nonlinearity Error -6 ±0.5 +6 LSb ADCREF+ = 3.0V,

ADCREF- = 0V
AD03 EDL Differential Nonlinearity Error -1 ±0.5 +2.5 LSb ADCREF+ = 3.0V,

ADCREF- = 0V
AD04 EOFF Offset Error -11.5 ±3 +11.5 LSb ADCREF+ = 3.0V,

ADCREF- = 0V
AD05 EGN Gain Error -4 ±1 +4 LSb ADCREF+ = 3.0V,

ADCREF- = 0V
AD06 VADREF ADC Reference Voltage (ADREF+ - ADREF-) 1.8 — VDD V
AD07 VAIN Full-Scale Range VSS — ADREF+ V
AD08 ZAIN Recommended Impedance of Analog Voltage Source — 1 — kΩ
AD09 RVREF ADC Voltage Reference Ladder Impedance — 50 — kΩ (Note 2)

* These parameters are characterized but not tested.

† Data in “Typ” column is at 3.0V, 25°C unless otherwise stated. These parameters are for design guidance only and are not tested.

Note:
  1. Total Absolute Error is the sum of the offset, gain and integral nonlinearity (INL) errors.
  2. This is the impedance seen by the VREF pads when the external reference pads are selected.