Datasheet

ADuC814
Rev. A | Page 5 of 72
Parameter V
DD
= 5 V V
DD
= 3 V Unit Test Conditions
TEMPERATURE MONITOR
9
Voltage Output at 25ºC 650 650 mV typ
Voltage TC –2 –2 mV/ºC typ
Accuracy 3 3 ºC typ 2.5 V internal reference
Accuracy 1.5 1.5 ºC typ 2.5 V external reference
DAC CHANNEL SPECIFICATIONS DAC Load to AGND RL = 10 kΩ, CL = 100 pF
DC ACCURACY
10
Resolution 12 12 Bits
Relative Accuracy +3 +3 LSB typ
Differential Nonlinearity
11
–1 –1 LSB max Guaranteed montonic
1/2 1/2 LSB typ
Offset Error 50 50 mV max V
REF
range
Gain Error 1 1 % max V
REF
range
1 1 % typ AV
DD
range
Gain Error Mismatch 0.5 0.5 % typ Of full scale on DAC1
ANALOG OUTPUTS
Voltage Range_0 0 to V
REF
Volts DAC V
REF
= 2.5 V
Voltage Range_1 0 to V
DD
Volts DAC V
REF
= V
DD
Output Impedance 0.5 0.5 Ω typ
I
SINK
50 50 µA typ
DAC AC Specifications
Voltage Output Settling Time 15 15 µs typ
Full-scale settling time to within ½ LSB of final
value
Digital-to-Analog Glitch Energy 10 10 nVs typ 1 LSB change at major carry
REFERENCE INPUT/OUTPUT
REFERENCE OUTPUT
Output Voltage (V
REF
) 2.5 2.5 V
Accuracy 2.5 2.5 % max Of V
REF
measured at the C
REF
pin
Power Supply Rejection 47 57 dB typ
Reference Tempco 100 100 ppm/ºC typ
Internal V
REF
Power-On Time
12
80 80 ms typ
EXTERNAL REFERENCE INPUT
13
Internal band gap reference deselected via
ADCCON2.6
Voltage Range (V
REF
)
14
1.0 1.0 V min
V
DD
V
DD
V max
Input Impedance 20 20 kΩ typ
Input Leakage 10 10 µA max
POWER SUPPLY MONITOR (PSM)
V
DD
Trip Point Selection Range 2.63 2.63 V
2.93 2.93 V Four trip points selectable in this range
3.08 3.08 V programmed via TP1–0 in PSMCON
4.63 V
V
DD
Power Supply Trip Point Accuracy 3.5 3.5 % max
WATCH DOG TIMER (WDT)
14
Timeout Period 0 0 ms min Nine time-out periods selectable in this range
2000 2000 ms max programmed via PRE3–0 in WDCON
LOGIC INPUTS
INPUT VOLTAGES
14
All Inputs except SCLOCK, RESET, and
XTAL1
V
INL
, Input Low Voltage 0.8 0.4 V max
V
INH
, Input High Voltage 2.0 2.0 V min