Datasheet

© 2007 Microchip Technology Inc. DS21664D-page 55
MCP2502X/5X
9.4 A/D Converter Characteristics
AC Converter Characteristics
Industrial (I): TAMB = -40°C to +85°C VCC = 2.7V to 5.5V
Automotive (E): T
AMB = -40°C to +125°C VCC = 4.5V to 5.5V
Param.
No.
Sym Characteristics Min Max Units Test Conditions
N
R A/D resolution — 10-bits VREF = VDD = 5.12V, VSS ≤ in
≤V
REF
NINT A/D Integral error — less than
±1 LSb
VREF+ = VDD = 5.12V,
V
SS- = VSS = 0 V (I TEMP)
N
DIF A/D Differential error — less than
±1 LSb
VREF+ = VDD = 5.12V,
V
SS- = VSS = 0 V (I TEMP)
NG A/D Gain error — less than
±1 LSb
VREF+ = VDD = 5.12V,
V
SS- = VSS = 0 V
NOFF A/D Offset error — less than
±2 LSb
VREF+ = VDD = 5.12V,
V
SS- = VSS = 0 V
Monotonicity — — V
SS ≤ in ≤VREF
VREF Reference Voltage 4.096 VDD+0.3 V Absolute minimum to ensure
10-bit accuracy.
V
REF+ Reference V high VREF- VDD+0.3 V Minimum resolution for A/D is
1mV.
V
REF- Reference V low VSS-0.3 VREF+ V Minimum resolution for A/D is
1mV.
V
AIN Analog input V VREF-VREF+V
ZAIN Recommended impedance
of analog voltage source
—2.5kΩ Note
I
REF VREF input current — 10 µA
NHYS Analog Transmit-on-change
Hysteresis
— 2 LSb Specified by design (see
Section 4.5.2.1 “Hysteresis
Function”)
Note: Design guidance only