LT1991 Linear Technology, LT1991 Datasheet - Page 5

• Manufacturer Part Number: LT1991
• Description: Precision / 100uA Gain Selectable Amplifier
• Manufacturer: Linear Technology

ELECTRICAL CHARACTERISTICS
temperature range of –40°C to 125°C for H-grade parts, otherwise specifi cations are at T
V
SYMBOL
ΔG
GNL
ΔG/ΔT
CMRR
V
V
ΔV
IB
I
e
R
ΔR
ΔR/ΔT
OS
n
CM
OS
S
IN
OS
= 5V, 0V or ±15V; V
/ΔT
PARAMETER
Gain Error
Gain Nonlinearity
Gain Drift vs Temperature (Note 6)
Common Mode Rejection Ratio,
Referred to Inputs (RTI)
Input Voltage Range (Note 7)
Op Amp Offset Voltage (Note 8)
Op Amp Offset Voltage Drift (Note 6)
Op Amp Input Bias Current (Note 11)
Op Amp Input Offset Current (Note 11)
Op Amp Input Noise Voltage
Input Noise Voltage Density
Input Impedance (Note 10)
Resistor Matching (Note 9)
Resistor Temperature Coeffi cient (Note 6) Resistor Matching
CM
= V
REF
= half supply, unless otherwise noted.
CONDITIONS
V
G = 1
G = 3 or 9
V
V
V
G = 9
G = 3
G = 1
P1/M1 Inputs
V
V
V
P1/M1 Inputs, P9/M9 Connected to REF
V
V
V
P3/M3 Inputs
V
V
V
P9/M9 Inputs
V
V
V
LT1991MS
LT1991DD
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)
450k Resistors
Other Resistors
Absolute Value
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
= ±15V, V
= ±15V; V
= ±15V; V
= ±15V; V
= ±15V; V
= 5V, 0V; V
= 3V, 0V; V
= ±15V; V
= 5V, 0V; V
= 3V, 0V; V
= ±15V; V
= 5V, 0V; V
= 3V, 0V; V
= ±15V; V
= 5V, 0V; V
= 3V, 0V; V
The
l
denotes the specifi cations which apply over the operating
OUT
OUT
OUT
CM
REF
REF
REF
REF
REF
REF
REF
REF
REF
REF
REF
REF
= ±15.2V
= ±10V; R
= 0V
= 0V
= 0V
= 0V
= ±10V; R
= ±10V; R
= 2.5V
= 1.25V
= 2.5V
= 1.25V
= 2.5V
= 1.25V
= 2.5V
= 1.25V
L
L
L
= 10k
= 10k
= 10k
A
= 25°C. Difference amplifi er confi guration,
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
–15.2
–15.2
–0.5
0.75
–1.5
0.95
0.85
MIN
–28
–60
–14
630
420
350
315
105
0.5
1.0
77
70
70
35
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0.35
0.07
0.25
0.05
0.02
0.04
TYP
100
180
900
600
500
450
150
–30
0.3
0.3
2.5
0.3
93
90
25
25
50
46
50
1
LT1991
±0.08
±0.12
1000
4500
1170
MAX
27.6
2.35
16.8
15.2
1.95
15.2
0.08
0.12
100
285
150
295
780
650
585
195
5.1
7.3
4.2
3.9
1.9
10
60
25
65
3
1
5
3
ppm/°C
ppm/°C
ppm/°C
nV/√Hz
nV/√Hz
UNITS
μV
μV
μV/°C
μV
μV
1991fg
5
ppm
RMS
RMS
kΩ
kΩ
kΩ
kΩ
kΩ
kΩ
P-P
P-P
dB
dB
dB
μV
μV
μV
μV
nA
nA
pA
pA
%
%
%
%
V
V
V
V
V
V
V
V
V
V
V
V