Datasheet
PIC16C77X
1999-2013 Microchip Technology Inc. Advance Information DS30275B-page 165
TABLE 15-9 A/D CONVERTER CHARACTERISTICS:
Param
No.
Sym Characteristic Min Typ† Max Units Conditions
A01 N
R Resolution — — 12 bits bit Min. resolution for A/D is 1 mV,
V
REF+ = AVDD = 4.096V,
V
REF- = AVSS = 0V,
V
REF- VAIN VREF+
A03 E
IL Integral error — — +/-2 LSb — VREF+ = AVDD = 4.096V,
V
REF- = AVSS = 0V,
V
REF- VAIN VREF+
A04 E
DL Differential error — — +2 LSb
-1 LSb
— No missing codes to 12-bits
V
REF+ = AVDD = 4.096V,
V
REF- = AVSS = 0V,
V
REF- VAIN VREF+
A06 E
OFF Offset error — — less than
2 LSb
—VREF+ = AVDD = 4.096V,
V
REF- = AVSS = 0V,
V
REF- VAIN VREF+
A07 E
GN Gain Error — — +/- 2LSb LSb VREF+ = AVDD = 4.096V,
V
REF- = AVSS = 0V,
V
REF- VAIN VREF+
A10 — Monotonicity — guaranteed
(3)
——AVSS VAIN VREF+
A20 V
REF Reference voltage
(V
REF+ VREF-)
4.096 — V
DD +0.3V V Absolute minimum electrical spec to
ensure 12-bit accuracy.
A21 V
REF+ Reference V High
(A
VDD or VREF+)
V
REF-— AVDD V Min. resolution for A/D is 1 mV
A22 V
REF- Reference V Low
(A
VSS or VREF-)
AV
SS —VREF+ V Min. resolution for A/D is 1 mV
A25 V
AIN Analog input voltage VREFL —VREFH V
A30 Z
AIN Recommended
impedance of analog
voltage source
——2.5k
A50 I
REF VREF input current
(Note 2)
——10A During VAIN acquisition.
Based on differential of V
HOLD to VAIN.
To charge C
HOLD see Section 11.0.
During A/D conversion cycle.
* These parameters are characterized but not tested.
† Data in “Typ” column is at 5V, 25C unless otherwise stated. These parameters are for design guidance only and are not
tested.
Note 1: When A/D is off, it will not consume any current other than minor leakage current. The power down current spec includes any
such leakage from the A/D module.
2: V
REF current is from External VREF+, OR VREF-, or AVSS, or AVDD pin, whichever is selected as reference input.
3: The A/D conversion result never decreases with an increase in the input voltage and has no missing codes.
774.book Page 165 Tuesday, January 29, 2013 12:02 PM