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AD5940 Datasheet(PDF) 13 Page - Analog Devices

Part # AD5940
Description  High Precision, Impedance, and Electrochemical Front End
PDF  130 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD5940 Datasheet(HTML) 13 Page - Analog Devices

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



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