Datasheet

AD8295
Rev. A | Page 3 of 28
SPECIFICATIONS
INSTRUMENTATION AMPLIFIER SPECIFICATIONS, SINGLE-ENDED AND DIFFERENTIAL OUTPUT
CONFIGURATIONS
V
S
= ±15 V, V
REF
= 0 V, T
A
= 25°C, G = 1, R
L
= 2 kΩ, unless otherwise noted. The differential configuration is shown in Figure 65.
Table 2.
A Grade B Grade
Parameter Test Conditions Min Typ Max Min Typ Max Unit
COMMON-MODE REJECTION
RATIO (CMRR)
V
CM
= −10 V to +10 V
CMRR, DC to 60 Hz 1 kΩ source imbalance
G = 1 80 90 dB
G = 10 100 110 dB
G = 100 120 130 dB
G = 1000 130 140 dB
CMRR at 8 kHz
G = 1 80 80 dB
G = 10 90 100 dB
G = 100 100 120 dB
G = 1000 110 120 dB
NOISE
Voltage Noise, 1 kHz
RTI noise =
√(e
NI
2
+ (e
NO
/G)
2
)
Input Voltage Noise, e
NI
V
IN+
, V
IN−
, V
REF
= 0 V 8 8 nV/√Hz
Output Voltage Noise, e
NO
V
IN+
, V
IN−
, V
REF
= 0 V 75 75 nV/√Hz
RTI f = 0.1 Hz to 10 Hz
G = 1 2 2 μV p-p
G = 10 0.5 0.5 μV p-p
G = 100 to 1000 0.25 0.25 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 RTI V
OS
= V
OSI
+ (V
OSO
/G)
Input Offset Voltage, V
OSI
V
S
= ±5 V to ±15 V 120 60 μV
Over Temperature T
A
= −40°C to +85°C 150 80 μV
Average TC 0.4 0.3 μV/°C
Output Offset Voltage, V
OSO
V
S
= ±5 V to ±15 V 500 350 μV
Over Temperature T
A
= −40°C to +85°C 0.8 0.5 mV
Average TC 9 5 μV/°C
Offset RTI vs. Supply (PSR) V
S
= ±2.3 V to ±18 V
G = 1 90 110 94 110 dB
G = 10 110 120 114 130 dB
G = 100 124 130 130 140 dB
G = 1000 130 140 140 150 dB
INPUT CURRENT
Input Bias Current 0.5 2.0 0.2 0.8 nA
Over Temperature T
A
= −40°C to +85°C 3.0 1.5 nA
Average TC 1 1 pA/°C
Input Offset Current 0.2 1 0.1 0.5 nA
Over Temperature T
A
= −40°C to +85°C 1.5 0.6 nA
Average TC 1 0.5 2 pA/°C