Datasheet

© 2007-2012 Microchip Technology Inc. DS70292G-page 381
dsPIC33FJ32GP302/304, dsPIC33FJ64GPX02/X04, AND dsPIC33FJ128GPX02/X04
TABLE 30-42: 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,
AV
DD = VREFH = 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,
AV
DD = VREFH = 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).