Data Sheet
AD5940
Parameter
GPIO Input Voltage
Low
Symbol Min
Typ
Max
Unit
Test Conditions/Comments
VINL
0.25 ×
IOVDD
V
V
High
VINH
0.57 ×
IOVDD
XTALI Input Voltage
Low
High
VINL
VINH
1.1
1.7
V
V
LOGIC INPUTS
GPIO Input Voltage1
Low
VINL
VINH
0.25 ×
IOVDD
V
High
0.57 ×
V
IOVDD
30
Pull-Up Current1
LOGIC OUTPUTS
GPIO Output Voltage1, 8
High
130
μA
Input voltage (VIN) = 0 V; DVDD = 3.6 V
All digital outputs, excluding XTALO
VOH
VOL
IOVDD
− 0.4
V
Source current (ISOURCE) = 2 mA
Low
0.35
100
V
Sink current (ISINK) = 2 mA
VIN = 3.3 V
Pull-Down Current1
GPIO Short-Circuit Current
30
μA
mA
V
11.5
1.8
PIN SUPPLY RANGE FOR 1.8 V
INPUT/OUTPUT1
1.62
1.98
Input Voltage
Low
VINL
0.3 ×
pin
supply
0.7 ×
pin
V
V
High
VINH
supply
Output Voltage
Low
High
VOL
VOH
0.45
Pin
V
V
ISINK = 1.0 mA
ISOURCE = 1.0 mA
supply
− 0.5
OSCILLATORS
Internal System Oscillator
16 or
32
MHz
Accuracy
16 MHz Mode
32 MHz Mode
0.5
0.5
3
3
%
%
External Crystal Oscillator
16
32
MHz
Can be selected in place of the internal
oscillator
Leakage
500
590
nA
XTALI/XTALO pins
Logic Inputs, XTALI Only
Input Low Voltage
Input High Voltage
XTALI Input Capacitance
XTALO Output Capacitance
32 kHz Internal Oscillators
Accuracy
VINL
VINH
1.1
1.7
8
8
32.768
5
V
V
pF
pF
kHz
%
Used for watchdog timers and wake-up timers
15
EXTERNAL INTERRUPTS
Pulse Width1
Level Triggered
Edge Triggered
7
1
ns
ns
Rev. 0 | Page 13 of 130
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