
REV. B
–5–
ADuC824
Parameter
ADuC824BS
Test Conditions/Comments
Unit
TRANSDUCER BURNOUT CURRENT SOURCES
AIN+ Current
–100
AIN+ is the Selected Positive Input to
nA typ
the Primary ADC
AIN– Current
+100
AIN– is the Selected Negative Input to
nA typ
the Auxiliary ADC
Initial Tolerance @ 25
°C Drift
±10
% typ
Drift
0.03
%/
°C typ
EXCITATION CURRENT SOURCES
Output Current
–200
Available from Each Current Source
A typ
Initial Tolerance @ 25
°C
±10
% typ
Drift
200
ppm/
°C typ
Initial Current Matching @ 25
°C
±1
Matching Between Both Current Sources % typ
Drift Matching
20
ppm/
°C typ
Line Regulation (AVDD)1
AVDD = 5 V + 5%
A/V typ
Load Regulation
0.1
A/V typ
Output Compliance
AVDD – 0.6
V max
AGND
min
LOGIC INPUTS
All Inputs Except SCLOCK, RESET,
and XTAL1
VINL, Input Low Voltage
0.8
DVDD = 5 V
V max
0.4
DVDD = 3 V
V max
VINH, Input High Voltage
2.0
V min
SCLOCK and RESET Only
(Schmitt-Triggered Inputs)
2
VT+
1.3/3
DVDD = 5 V
V min/V max
0.95/2.5
DVDD = 3 V
V min/V max
VT–
0.8/1.4
DVDD = 5 V
V min/V max
0.4/1.1
DVDD = 3 V
V min/V max
VT+ – VT–
0.3/0.85
DVDD = 5 V
V min/V max
0.3/0.85
DVDD = 3 V
V min/V max
Input Currents
Port 0, P1.2–P1.7,
EA
±10
VIN = 0 V or VDD
A max
SCLOCK, SDATA/MOSI, MISO,
SS12
–10 min, –40 max
VIN = 0 V, DVDD = 5 V, Internal Pull-Up
A min/A max
±10
VIN = VDD, DVDD = 5 V
A max
RESET
±10
VIN = 0 V, DVDD = 5 V
A max
35 min, 105 max
VIN = VDD, DVDD = 5 V,
A min/A max
Internal Pull-Down
P1.0, P1.1, Ports 2 and 3
±10
VIN = VDD, DVDD = 5 V
A max
–180
VIN = 2 V, DVDD = 5 V
A min
–660
A max
–20
VIN = 450 mV, DVDD = 5 V
A min
–75
A max
Input Capacitance
5
All Digital Inputs
pF typ
CRYSTAL OSCILLATOR (XTAL1 AND XTAL2)
Logic Inputs, XTAL1 Only
VINL, Input Low Voltage
0.8
DVDD = 5 V
V max
0.4
DVDD = 3 V
V max
VINH, Input High Voltage
3.5
DVDD = 5 V
V min
2.5
DVDD = 3 V
V min
XTAL1 Input Capacitance
18
pF typ
XTAL2 Output Capacitance
18
pF typ