LT1991
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. Difference amplifier configuration, V
S
= 5V, 0V or
±15V;
V
CM
= V
REF
= half supply, unless otherwise noted.
SYMBOL
V
CM
PARAMETER
Input Voltage Range (Note 7)
CONDITIONS
P1/M1 Inputs, P9/M9 Connected to REF
V
S
=
±15V;
V
REF
= 0V
V
S
= 5V, 0V; V
REF
= 2.5V
V
S
= 3V, 0V; V
REF
= 1.25V
P3/M3 Inputs
V
S
=
±15V;
V
REF
= 0V
V
S
= 5V, 0V; V
REF
= 2.5V
V
S
= 3V, 0V; V
REF
= 1.25V
P9/M9 Inputs
V
S
=
±15V;
V
REF
= 0V
V
S
= 5V, 0V; V
REF
= 2.5V
V
S
= 3V, 0V; V
REF
= 1.25V
V
OS
Op Amp Offset Voltage (Note 8)
LT1991AMS, V
S
= 5V, 0V
●
●
●
●
●
●
●
●
●
●
ELECTRICAL CHARACTERISTICS
MIN
–60
–14
–1.5
–15.2
0.5
0.95
–15.2
0.85
1.0
TYP
MAX
60
16.8
7.3
15.2
4.2
1.95
15.2
3.9
1.9
UNITS
V
V
V
V
V
V
V
V
V
µV
µV
µV
µV
µV
µV
µV
µV
µV/°C
nA
nA
pA
pA
pA
pA
µV
P-P
µV
RMS
µV
P-P
µV
RMS
nV/√Hz
nV/√Hz
15
15
●
50
135
80
160
100
200
150
250
1
5
7.5
500
750
1000
1500
LT1991AMS, V
S
=
±15V
LT1991MS
●
25
25
●
●
●
LT1991DD
∆V
OS
/∆T
I
B
I
OS
Op Amp Offset Voltage Drift (Note 6)
Op Amp Input Bias Current
Op Amp Input Offset Current
LT1991A
●
0.3
2.5
50
50
LT1991
●
Op Amp Input Noise Voltage
0.01Hz to 1Hz
0.01Hz to 1Hz
0.1Hz to 10Hz
0.1Hz to 10Hz
G = 1; f = 1kHz
G = 9; f = 1kHz
P1 (M1 = Ground)
P3 (M3 = Ground)
P9 (M9 = Ground)
M1 (P1 = Ground)
M3 (P3 = Ground)
M9 (P9 = Ground)
●
●
●
●
●
●
●
●
●
●
●
●
●
●
0.35
0.07
0.25
0.05
180
46
630
420
350
315
105
35
900
600
500
450
150
50
0.01
0.02
0.02
0.04
0.3
–30
105
135
2.4
2.7
1170
780
650
585
195
65
0.04
0.06
0.08
0.12
3
e
n
R
IN
Input Noise Voltage Density
Input Impedance (Note 10)
kΩ
kΩ
kΩ
kΩ
kΩ
kΩ
%
%
%
%
ppm/°C
ppm/°C
dB
V
1991fb
∆R
Resistor Matching
(Note 9)
450k Resistors, LT1991A
Other Resistors, LT1991A
450k Resistors, LT1991
Other Resistors, LT1991
Resistor Matching
Absolute Value
V
S
=
±1.35V
to
±18V
(Note 8)
∆R/∆T
PSRR
Resistor Temperature Coefficient (Note 6)
Power Supply Rejection Ratio
Minimum Supply Voltage
3
LINEAR [ LINEAR INTEGRATED SYSTEMS ]
