AD8228
Rev. 0 | Page 5 of 24
GAIN = 100
V
S
= ±15 V, V
REF
= 0 V, T
A
= 25°C, R
L
= 2 kΩ, all specifications referred to input, unless otherwise noted.
Table 3.
Conditions A Grade B Grade
Parameter (Gain = 100) Min Typ Max Min Typ Max Unit
COMMON-MODE REJECTION RATIO
CMRR DC to 60 Hz with 1 kΩ
Source Imbalance
V
CM
= −10 V to +10 V 114 120 dB
CMRR at 2 kHz V
CM
= −10 V to +10 V 100 105 dB
NOISE
V
IN+
= V
IN−
= V
REF
= 0 V
Voltage Noise f = 1 kHz 8 8 nV/√Hz
f = 0.1 Hz to 10 Hz 0.3 0.3 μV p-p
Current Noise f = 1 kHz 40 40 fA/√Hz
f = 0.1 Hz to 10 Hz 6 6 pA p-p
VOLTAGE OFFSET Referred to input,
V
S
= ±5 V to ±15 V
Offset 90 50 μV
Over Temperature T = −40°C to +85°C 140 80 μV
Average TC T = −40°C to +85°C 0.9 0.5 μV/°C
Offset vs. Supply (PSR) 118 140 124 140 dB
INPUT CURRENT
Input Bias Current 0.5 1.5 0.4 0.6 nA
Over Temperature T = −40°C to +85°C 2.0 1 nA
Average TC T = −40°C to +85°C 1 1 pA/°C
Input Offset Current 0.2 0.6 0.1 0.4 nA
Over Temperature T = −40°C to +85°C 0.8 0.6 nA
Average TC T = −40°C to +85°C 1 1 pA/°C
REFERENCE INPUT
R
IN
20 20 kΩ
I
IN
V
IN+
= V
IN−
= V
REF
= 0 V 50 60 50 60 μA
Voltage Range −V
S
+V
S
−V
S
+V
S
V
Gain to Output 1 ± 0.0001 1 ± 0.0001 V/V
DYNAMIC RESPONSE
Small Signal −3 dB Bandwidth 110 110 kHz
Settling Time 0.01% 10 V step 13 13 μs
Settling Time 0.001% 10 V step 15 15 μs
Slew Rate 2 2.5 2 2.5 V/μs
GAIN V
OUT
= −10 V to +10 V
Gain Error 0.1 0.05 %
Gain Nonlinearity
R
L
= 10 kΩ 5 15 5 15 ppm
R
L
= 2 kΩ 15 45 15 45 ppm
Gain vs. Temperature 1 10 1 2 ppm/°C
INPUT
Input Impedance
Differential 100||2 100||2 GΩ||pF
Common Mode 100||2 100||2 GΩ||pF
Input Operating Voltage Range
1
V
S
= ±2.3 V to ±5 V −V
S
+ 1.9 +V
S
− 1.1 −V
S
+ 1.9 +V
S
− 1.1 V
Over Temperature T = −40°C to +85°C −V
S
+ 2.0 +V
S
− 1.2 −V
S
+ 2.0 +V
S
− 1.2 V
Input Operating Voltage Range
1
V
S
= ±5 V to ±18 V −V
S
+ 1.9 +V
S
− 1.2 −V
S
+ 1.9 +V
S
− 1.2 V
Over Temperature T =−40°C to +85°C −V
S
+ 2.0 +V
S
− 1.2 −V
S
+ 2.0 +V
S
− 1.2 V
