Datasheet
2009-2011 Microchip Technology Inc. DS41365E-page 355
PIC18(L)F1XK22
TABLE 25-10: COMPARATOR SPECIFICATIONS
TABLE 25-11: DIGITAL-TO-ANALOG CONVERTER (DAC) SPECIFICATIONS
TABLE 25-12: FIXED VOLTAGE REFERENCE (FVR) SPECIFICATIONS
Operating Conditions: 1.8V < VDD < 3.6V, -40°C < TA < +125°C (unless otherwise stated).
Param
No.
Sym Characteristics Min Typ Max Units Comments
CM01 VIOFF Input Offset Voltage — 10 50 mV VREF = VDD/2,
High Power Mode
—1280mVV
REF = VDD/2,
Low Power Mode
CM02 V
ICM Input Common-mode Voltage VSS —VDD V
CM04 TRESP Response Time — 200 400 ns High Power Mode
— 300 600 ns Low Power Mode
CM05 T
MC2OV Comparator Mode Change to
Output Valid*
—— 10s
* These parameters are characterized but not tested.
Note 1: Response time measured with one comparator input at V
DD/2, while the other input transitions
from V
SS to VDD.
Operating Conditions: 1.8V < V
DD < 5.5V, -40°C < TA < +125°C (unless otherwise stated).
Param
No.
Sym. Characteristics Min. Typ. Max. Units Comments
DAC01* C
LSB Step Size — VDD/32 — V
DAC02* C
ACC Absolute Accuracy — — 1/2 LSb
DAC03* CR Unit Resistor Value (R) — 5k —
DAC04* CST Settling Time
(1)
——10s
* These parameters are characterized but not tested.
Note 1: Settling time measured while DACR<4:0> transitions from ‘0000’ to ‘1111’.
Operating Conditions: 1.8V < V
DD < 5.5V, -40°C < TA < +85°C (unless otherwise stated).
VR Voltage Reference Specifications
Standard Operating Conditions (unless otherwise stated)
Operating temperature -40°C T
A +85°C
-40°C T
A +125°C
Param
No.
Sym. Characteristics Min. Typ. Max. Units Comments
D003 VADFVR Fixed Voltage Reference Voltage for
ADC, Initial Accuracy
-8 — 6 % 1.024V, VDD 2.5V
(1)
2.048V, VDD 2.5V
4.096V, V
DD 4.75V
D003A V
CDAFVR Fixed Voltage Reference Voltage for
Comparator and DAC, Initial Accuracy
-11 — 7 % 1.024V, VDD 2.5V
2.048V, V
DD 2.5V
4.096V, V
DD 4.75V
D004* S
VDD VDD Rise Rate to ensure internal
Power-on Reset signal
0.05 — — V/ms See Section 21.3 “Power-on
Reset (POR)” for details.
* These parameters are characterized but not tested.
Note 1: For proper operation, the minimum value of the ADC positive voltage reference must be 1.8V or greater.
When selecting the FVR or the V
REF+ pin as the source of the ADC positive voltage reference, be aware
that the voltage must be 1.8V or greater.