Datasheet
REV. 0
–4–
ADuC816–SPECIFICATIONS
1
Parameter ADuC816BS Unit Test Conditions/Comments
INTERNAL REFERENCE
ADC Reference
Reference Voltage 1.25 ± 1% V min/max Initial Tolerance @ 25°C, V
DD
= 5 V
Power Supply Rejection 45 dBs typ
Reference Tempco 100 ppm/°C typ
DAC Reference
Reference Voltage 2.5 ± 1% V min/max Initial Tolerance @ 25°C, V
DD
= 5 V
Power Supply Rejection 50 dBs typ
Reference Tempco ± 100 ppm/°C typ
ANALOG INPUTS/REFERENCE INPUTS
Primary ADC
Differential Input Voltage Ranges
8, 9
External Reference Voltage = 2.5 V
RN2, RN1, RN0 of ADC0CON Set to
Bipolar Mode (ADC0CON.3 = 0) ± 20 mV 0 0 0 (Unipolar Mode 0 mV to 20 mV)
± 40 mV 0 0 1 (Unipolar Mode 0 mV to 40 mV)
± 80 mV 0 1 0 (Unipolar Mode 0 mV to 80 mV)
± 160 mV 0 1 1 (Unipolar Mode 0 mV to 160 mV)
± 320 mV 1 0 0 (Unipolar Mode 0 mV to 320 mV)
± 640 mV 1 0 1 (Unipolar Mode 0 mV to 640 mV)
± 1.28 V 1 1 0 (Unipolar Mode 0 V to 1.28 V)
± 2.56 V 1 1 1 (Unipolar Mode 0 V to 2.56 V)
Analog Input Current
2
± 1 nA max
Analog Input Current Drift ± 5pA/°C typ
Absolute AIN Voltage Limits AGND + 100 mV V min
AV
DD
– 100 mV V max
Auxiliary ADC
Input Voltage Range
8, 9
0 to V
REF
V Unipolar Mode, for Bipolar Mode
See Note 11
Average Analog Input Current 125 nA/V typ Input Current Will Vary with Input
Average Analog Input Current Drift
2
± 2 pA/V/°C typ Voltage on the Unbuffered Auxiliary ADC
Absolute AIN Voltage Limits
10
AGND – 30 mV V min
AV
DD
+ 30 mV V max
External Reference Inputs
REFIN(+) to REFIN(–) Range
2
1 V min
AV
DD
V max
Average Reference Input Current 1 μA/V typ Both ADCs Enabled
Average Reference Input Current Drift ± 0.1 nA/V/°C typ
“NO Ext. REF” Trigger Voltage 0.3 V min NOXREF Bit Active if V
REF
< 0.3 V
0.65 V max NOXREF Bit Inactive if V
REF
> 0.65 V
ADC SYSTEM CALIBRATION
Full-Scale Calibration Limit +1.05 × FS V max
Zero-Scale Calibration Limit –1.05 × FS V min
Input Span 0.8 × FS V min
2.1 × FS V max
ANALOG (DAC) OUTPUTS
Voltage Range 0 to V
REF
V typ DACRN = 0 in DACCON SFR
0 to AV
DD
V typ DACRN = 1 in DACCON SFR
Resistive Load 10 kΩ typ From DAC Output to AGND
Capacitive Load 100 pF typ From DAC Output to AGND
Output Impedance 0.5 Ω typ
I
SINK
50 μA typ
TEMPERATURE SENSOR
Accuracy ± 2 °C typ
Thermal Impedance (θ
JA
)90 °C/W typ
REV. A