Datasheet
(e ) +
NI
2
e
NO
G
2
Total RTI voltage noise = .
INA826
www.ti.com
SBOS562E –AUGUST 2011–REVISED APRIL 2013
ELECTRICAL CHARACTERISTICS
At T
A
= +25°C, V
S
= ±15 V, R
L
= 10 kΩ, V
REF
= 0 V, and G = 1, unless otherwise noted.
INA826
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
INPUT
RTI 40 150 µV
V
OSI
Input stage offset voltage
(1)
vs temperature, T
A
= –40°C to +125°C 0.4 2 µV/°C
RTI 200 700 µV
Output stage offset
V
OSO
voltage
(1)
vs temperature, T
A
= –40°C to +125°C 2 10 µV/°C
G = 1, RTI 100 124 dB
G = 10, RTI 115 130 dB
PSRR Power supply rejection
G = 100, RTI 120 140 dB
G = 1000, RTI 120 140 dB
Z
IN
Differential impedance 20 || 1 GΩ || pF
Z
IN
Common-mode impedance 10 || 5 GΩ || pF
RFI filter, –3-dB frequency 20 MHz
V– (V+) – 1 V
V
CM
Operating input range
(2)
V
S
= ±1.35 V to ±18 V, T
A
= –40°C to +125°C See Figure 41 to Figure 44 V
Input overvoltage range T
A
= –40°C to +125°C ±40 V
G = 1, V
CM
= (V–) to (V+) – 1 V 84 95 dB
G = 10, V
CM
= (V–) to (V+) – 1 V 104 115 dB
DC to G = 100, V
CM
= (V–) to (V+) – 1 V 120 130 dB
60 Hz, RTI
G = 1000, V
CM
= (V–) to (V+) – 1 V 120 130 dB
G = 1, V
CM
= (V–) to (V+) – 1 V,
CMRR Common-mode rejection 80 dB
T
A
= –40°C to +125°C
G = 1, V
CM
= (V–) to (V+) – 1 V 84 dB
G = 10, V
CM
= (V–) to (V+) – 1 V 100 dB
At 5 kHz,
RTI
G = 100, V
CM
= (V–) to (V+) – 1 V 105 dB
G = 1000, V
CM
= (V–) to (V+) – 1 V 105 dB
BIAS CURRENT
V
CM
= V
S
/2 35 65 nA
I
B
Input bias current
T
A
= –40°C to +125°C 95 nA
V
CM
= V
S
/2 0.7 5 nA
I
OS
Input offset current
T
A
= –40°C to +125°C 10 nA
NOISE VOLTAGE
f = 1 kHz, G = 100, R
S
= 0 Ω 18 20 nV/√Hz
e
NI
Input stage voltage noise
(3)
f
B
= 0.1 Hz to 10 Hz, G = 100, R
S
= 0 Ω 0.52 µV
PP
f = 1 kHz, G = 1, R
S
= 0 Ω 110 115 nV/√Hz
e
NO
Output stage voltage noise
(3)
f
B
= 0.1 Hz to 10 Hz, G = 1, R
S
= 0 Ω 3.3 µV
PP
f = 1 kHz 100 fA/√Hz
i
N
Noise current
f
B
= 0.1 Hz to 10 Hz 5 pA
PP
(1) Total offset, referred-to-input (RTI): V
OS
= (V
OSI
) + (V
OSO
/G).
(2) Input voltage range of the INA826 input stage. The input range depends on the common-mode voltage, differential voltage, gain, and
reference voltage. See Typical Characteristic curves Figure 9 through Figure 16 and Figure 41 through Figure 44 for more information.
(3)
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