Datasheet

© 2007-2011 Microchip Technology Inc. DS70290J-page 247
dsPIC33FJ32GP202/204 and dsPIC33FJ16GP304
TABLE 22-39: 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-
(3)
AD20a Nr Resolution
(4)
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
(1)
ADC Accuracy (12-bit Mode) – Measurements with internal VREF+/VREF-
(3)
AD20a Nr Resolution
(4)
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 — 10.5 20 LSb VINL = AVSS = 0V, AVDD = 3.6V
AD24a E
OFF Offset Error — 3.8 10 LSb VINL = AVSS = 0V, AVDD = 3.6V
AD25a — Monotonicity — — — — Guaranteed
(1)
Dynamic Performance (12-bit Mode)
(2)
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: The A/D conversion result never decreases with an increase in the input voltage, and has no missing
codes.
2: These parameters are characterized by similarity, but are not tested in manufacturing.
3: These parameters are characterized, but are tested at 20 ksps only.
4: Injection currents > | 0 | can affect the ADC results by approximately 4-6 counts.