Datasheet

PIC16(L)F1824/1828
DS41419D-page 374  2010-2012 Microchip Technology Inc.
TABLE 30-8: PIC16(L)F1824/1828 A/D CONVERTER (ADC) CHARACTERISTICS (NOTE 1, 2, 3)
TABLE 30-9: PIC16(L)F1824/1828 A/D CONVERSION REQUIREMENTS
Standard Operating Conditions (unless otherwise stated)
Operating temperature T
A  25°C
Param
No.
Sym. Characteristic Min. Typ† Max. Units Conditions
AD01 N
R Resolution — — 10 bit
AD02 E
IL Integral Error — — ±1.7 LSb VREF = 3.0V
AD03 E
DL Differential Error — — ±1 LSb No missing codes
V
REF = 3.0V
AD04 E
OFF Offset Error — — ±2.5 LSb VREF = 3.0V
AD05 E
GN Gain Error — — ±2.0 LSb VREF = 3.0V
AD06 V
REF Reference Voltage (NOTE 4) 1.8 — VDD VVREF = (VREF+ minus VREF-)
AD07 V
AIN Full-Scale Range VSS —VREF V
AD08 Z
AIN Recommended Impedance of
Analog Voltage Source
—— 10
k
Can go higher if external 0.01F capacitor is
present on input pin.
* 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 includes integral, differential, offset and gain errors.
2: The A/D conversion result never decreases with an increase in the input voltage and has no missing codes.
3: ADC V
REF is from external VREF, VDD pin or FVR, whichever is selected as reference input.
4: ADC Reference Voltage (
REF+) is the selected input, VREF+ pin, VDD pin or the FVR Buffer1. When the FVR is selected as
the reference input, the FVR Buffer1 output selection must be 2.048 or 4.096V (ADFVR<1:0> = 1x).
Standard Operating Conditions (unless otherwise stated)
Operating temperature -40°C  T
A  +125°C
Param
No.
Sym. Characteristic Min. Typ† Max. Units Conditions
AD130* T
AD A/D Clock Period 1.0 — 9.0 sTOSC-based
A/D Internal RC Oscillator
Period
1.0 2.5 6.0 s ADCS<1:0> = 11 (ADRC mode)
AD131 T
CNV Conversion Time (not including
Acquisition Time) (NOTE 1)
—11—TAD Set GO/DONE bit to conversion
complete
AD132* T
ACQ Acquisition Time — 5.0 — s
* 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: The ADRES register may be read on the following T
CY cycle.