AD8212
Rev. B | Page 3 of 16
SPECIFICATIONS
V
S
= 15 V, T
OPR
= −40°C to +125°C, T
A
= 25°C, unless otherwise noted.
Table 1.
Parameter Conditions/Comments Min Typ Max Unit
SUPPLY VOLTAGE (V+) No external pass transistor 7 65 V
With external PNP transistor
1
7 >500 V
SUPPLY CURRENT
2
(I
SUPPLY
= I
OUT
+ I
BIAS
)
V+ = 7 V to 65 V 220 720 μA
High voltage operation, using external PNP 200 1500 μA
VOLTAGE OFFSET
Offset Voltage (RTI) T
A
±2 mV
Over Temperature (RTI) T
OPR
±3 mV
Offset Drift T
OPR
±10 μV/°C
INPUT
Input Impedance
Differential 2 kΩ
Common Mode (V
CM
) V+ = 7 V to 65 V 5 MΩ
Voltage Range
Differential Maximum voltage between V+ and V
SENSE
500 mV
V
SENSE
(Pin 8) Current
3
V+ = 7 V to 65 V, T
OPR
100 200 nA
OUTPUT
Transconductance 1000 μA/V
Current Range (I
OUT
) 7 V ≤ V+ ≤ 65 V, 0 mV to 500 mV differential input 500 μA
Gain Error for T
OPR
7 V ≤ V+ ≤ 65 V, with respect to 500 μA full scale ±1 %
Impedance 20 MΩ
Voltage Range 0 V+ − 5 V
REGULATOR
Nominal Value 7 V ≤ V+ ≤ 65 V 4.80 5 5.20 V
PSRR 7 V ≤ V+ ≤ 65 V 80 dB
Bias Current (I
BIAS
) T
OPR
, 7 V ≤ V+ ≤ 65 V 185 200 μA
T
OPR
, high voltage operation 200 1000 μA
DYNAMIC RESPONSE
Small Signal −3 dB Bandwidth Gain = 10 1000 kHz
Gain = 20 500 kHz
Gain = 50 100 kHz
Settling Time Within 0.1% of the true output, gain = 20 2 μs
ALPHA PIN INPUT CURRENT 25 μA
NOISE
0.1 Hz to 10 Hz, RTI 1.1 μV p-p
Spectral Density, 1 kHz, RTI 40
nV/√Hz
TEMPERATURE RANGE
For Specified Performance (T
OPR
) −40 +125 °C
1
Range dependent on the V
CE
breakdown of the transistor.
2
The AD8212 supply current in normal voltage operation (V+ = 7 V to 65 V) is the bias current (I
BIAS
) added to output current (I
OUT
). Output current varies upon input
differential voltage and can range from 0 μA to 500 μA. I
BIAS
in this mode of operation is typically 185 μA and 200 μA maximum. For high voltage operation mode, refer
to the Hi section. gh Voltage Operation Using an External PNP Transistor
High Voltage Operation Using an External PNP Transistor
3
The current of the amplifier into V
SENSE
(Pin 8) increases when operating in high voltage mode. See the section
for more information.
