PIC16F1847_13 Datasheet, PDF (365/440 Pages) Microchip Technology – 18/20/28-Pin Flash Microcontrollers with XLP Technology

PIC16(L)F1847
TABLE 30-8: ANALOG-TO-DIGITAL CONVERTER (ADC) CHARACTERISTICS (NOTE 1, 2, 3)
Standard Operating Conditions (unless otherwise stated)
Operating temperature Tested at 25°C
Param.
No.
Sym.
Characteristic
Min. Typ†
Max. Units
Conditions
AD01 NR Resolution
—
—
10
bit
AD02 EIL Integral Error
—
±1
±1.7
LSb VREF = 3.0V
AD03 EDL Differential Error
—
±1
—
LSb No missing codes
VREF = 3.0V
AD04 EOFF Offset Error
—
±1
±2.5
LSb VREF = 3.0V
AD05 EGN Gain Error
—
±1
±2.0
LSb VREF = 3.0V
AD06 VREF Reference Voltage (Note 4) 1.8 —
VDD
V VREF = (VREF+ minus VREF-)
AD07 VAIN Full-Scale Range
VSS
—
VREF
V
AD08 ZAIN Recommended Impedance of —
—
Analog Voltage Source
10
k Can go higher if external 0.01F capacitor is
present on input pin.
† 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 ADC conversion result never decreases with an increase in the input voltage and has no missing codes.
3: ADC VREF is from external VREF, VDD or FVR, whichever is selected as reference input.
4: ADC Reference Voltage (Ref+) is the selected reference input, VREF+ pin, VDD pin or the FVR selected as the reference
input, the FVR Buffer1 output selection must be 2.048V or 4.096V (ADFVR<1:0> = 1x).
TABLE 30-9: ADC CONVERSION REQUIREMENTS
Standard Operating Conditions (unless otherwise stated)
Operating temperature -40°C  TA  +125°C
Param.
No.
Sym.
Characteristic
Min.
Typ†
AD130* TAD ADC Clock Period
1.0
ADC Internal RC Oscillator
1.0
Period
AD131 TCNV Conversion Time (not
—
including Acquisition Time)
(Note 1)
AD132* TACQ Acquisition Time
—
AD133* THCD Holding Capacitor Disconnect —
—
2.5
11
5.0
0.5*TAD + 40 ns
Max.
9.0
6.0
—
—
—
Units
Conditions
s FOSC-based
s ADCS<1:0> = 11
(FRC Oscillator mode)
TAD Set GO/DONE bit to conversion
complete
s
ADCS<2:0>  x11 (FOSC-based)
— (0.5*TAD + 40 ns) —
to
(1.5*TAD + 40 ns)
ADCS<2:0>  x11 (ADC FRC mode)
*
†
Note 1:
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.
The ADRES register may be read on the following TCY cycle.
 2011-2013 Microchip Technology Inc.
Preliminary
DS40001453D-page 365