Datasheet

AD8232 Data Sheet
Rev. A | Page 4 of 28
Parameter Symbol Test Conditions/Comments Min Typ Max Unit
RIGHT LEG DRIVE AMPLIFIER (A2)
Output Swing R
L
= 50 kΩ 0.1 +V
S
− 0.1 V
Short-Circuit Current I
OUT
11 mA
Integrator Input Resistor 120 150 180 kΩ
Gain Bandwidth Product GDP 100 kHz
REFERENCE BUFFER (A3)
Offset Error V
OS
R
L
> 50 kΩ 1 mV
Input Bias Current I
B
100 pA
Short-Circuit Current Limit I
OUT
12 mA
Voltage Range R
L
= 50 kΩ 0.1 +V
S
− 0.7 V
DC LEADS OFF COMPARATORS
Threshold Voltage +V
S
− 0.5 V
Hysteresis
60
mV
Propagation Delay 0.5 µs
AC LEADS OFF DETECTOR
Square Wave Frequency F
AC
50 100 175 kHz
Square Wave Amplitude
I
AC
200
nA p-p
Impedance Threshold Between +IN and −IN 10 20 MΩ
Detection Delay 110 μs
FAST RESTORE CIRCUIT
Switches S1 and S2
On Resistance R
ON
8 10 12 kΩ
Off Leakage 100 pA
Window Comparator
Threshold Voltage From either rail 50 mV
Propagation Delay
2
µs
Switch Timing Characteristics
Feedback Recovery Switch On Time t
SW1
110 ms
Filter Recovery Switch On Time t
SW2
55 ms
Fast Restore Reset t
RST
2 µs
LOGIC INTERFACE
Input Characteristics
Input Voltage (AC/
DC
and FR)
Low V
IL
1.24 V
High
V
IH
1.35
V
Input Voltage (
SDN
)
Low V
IL
2.1 V
High V
IH
0.5 V
Output Characteristics LOD+ and LOD− terminals
Output Voltage
Low V
OL
0.05 V
High V
OH
2.95 V
SYSTEM SPECIFICATIONS
Quiescent Supply Current
170
230
µA
T
A
= 0°C to 70°C 210 µA
Shutdown Current 40 500 nA
T
A
= 0°C to 70°C 100 nA
Supply Range 2.0 3.5 V
Specified Temperature Range 0 70 °C
Operational Temperature Range −40 +85 °C
1
Offset referred to the input of the instrumentation amplifier inputs. See the Input Referred Offsets section for additional information.