Datasheet

© 2007-2012 Microchip Technology Inc. DS70291G-page 401
dsPIC33FJ32MC302/304, dsPIC33FJ64MCX02/X04 AND dsPIC33FJ128MCX02/X04
TABLE 31-44: ADC MODULE SPECIFICATIONS (12-BIT MODE)
AC CHARACTERISTICS
Standard Operating Conditions: 3.0V to 3.6V
(unless otherwise stated)
Operating temperature -40°C ≤ T
A ≤ +85°C for Industrial
-40°C ≤ TA ≤ +125°C for Extended
Param
No.
Symbol Characteristic Min Typ Max Units Conditions
ADC Accuracy (12-bit Mode) – Measurements with external VREF+/VREF-
AD20a Nr Resolution
(1)
12 data bits bits
AD21a INL Integral Nonlinearity -2 — +2 LSb VINL = AVSS = VREFL = 0V, AVDD
= VREFH = 3.6V
AD22a DNL Differential Nonlinearity >-1 — <1 LSb V
INL = AVSS = VREFL = 0V, AVDD
= V
REFH = 3.6V
AD23a G
ERR Gain Error — 3.4 10 LSb VINL = AVSS = VREFL = 0V, AVDD
= VREFH = 3.6V
AD24a E
OFF Offset Error — 0.9 5 LSb VINL = AVSS = VREFL = 0V, AVDD
= V
REFH = 3.6V
AD25a — Monotonicity — — — — Guaranteed
ADC Accuracy (12-bit Mode) – Measurements with internal V
REF+/VREF-
AD20a Nr Resolution
(1)
12 data bits bits
AD21a INL Integral Nonlinearity -2 — +2 LSb V
INL = AVSS = 0V, AVDD = 3.6V
AD22a DNL Differential Nonlinearity >-1 — <1 LSb VINL = AVSS = 0V, AVDD = 3.6V
AD23a G
ERR Gain Error 2 10.5 20 LSb VINL = AVSS = 0V, AVDD = 3.6V
AD24a E
OFF Offset Error 2 3.8 10 LSb VINL = AVSS = 0V, AVDD = 3.6V
AD25a — Monotonicity — — — — Guaranteed
Dynamic Performance (12-bit Mode)
AD30a THD Total Harmonic Distortion — — -75 dB —
AD31a SINAD Signal to Noise and
Distortion
68.5 69.5 — dB —
AD32a SFDR Spurious Free Dynamic
Range
80 — — dB —
AD33a F
NYQ Input Signal Bandwidth — — 250 kHz —
AD34a ENOB Effective Number of Bits 11.09 11.3 — bits —
Note 1: Injection currents > |0| can affect the ADC results by approximately 4 to 6 counts (i.e., V
IH source > (VDD +
0.3V) or VIL source < (VSS – 0.3V).