LT1996
1
1996f
RESISTOR MATCHING (%)
PERCENTAGE OF UNITS (%)
0.04
1996 TA01b
–0.02
0
0.02
40
35
30
25
20
15
10
5
0
–0.04
LT1996A
G = 81
TYPICAL APPLICATIO
U
FEATURES
■
Pin Configurable as a Difference Amplifier,
Inverting and Noninverting Amplifier
■
Difference Amplifier
Gain Range 9 to 117
CMRR >80dB
■
Noninverting Amplifier
Gain Range 0.008 to 118
■
Inverting Amplifier
Gain Range –0.08 to –117
■
Gain Error: <0.05%
■
Gain Drift: < 3ppm/°C
■
Wide Supply Range: Single 2.7V to Split ±18V
■
Micropower Operation: 100µA Supply
■
Input Offset Voltage: 50µV (Max)
■
Gain Bandwidth Product: 560kHz
■
Rail-to-Rail Output
■
Space Saving 10-Lead MSOP and DFN Packages
Precision, 100µA
Gain Selectable Amplifier
The LT
®
1996 combines a precision operational amplifier
with eight precision resistors to form a one-chip solution
for accurately amplifying voltages. Gains from –117 to
118 with a gain accuracy of 0.05% can be achieved without
any external components. The device is particularly well
suited for use as a difference amplifier, where the excellent
resistor matching results in a common mode rejection
ratio of greater than 80dB.
The amplifier features a 50µV maximum input offset
voltage and a gain bandwidth product of 560kHz. The
device operates from any supply voltage from 2.7V to 36V
and draws only 100µA supply current on a 5V supply. The
output swings to within 40mV of either supply rail.
The internal resistors have excellent matching character-
istics; variation is 0.05% over temperature with a guaran-
teed matching temperature coefficent of less than 3ppm/°C.
The resistors are also extremely stable over voltage,
exhibiting a nonlinearity of less than 10ppm.
The LT1996 is fully specified at 5V and ±15V supplies and
from –40°C to 85°C. The device is available in space
saving 10-lead MSOP and DFN packages. For an amplifier
with selectable gains from –13 to 14, see the LT1991 data
sheet.
DESCRIPTIO
U
APPLICATIO S
U
Rail-to-Rail Gain = 9 Difference Amplifier Distribution of Resistor Matching
–
+
15V
–15V
∆V
IN
V
M(IN)
V
P(IN)
–
+
V
OUT
= V
REF
+ 9 •
∆V
IN
SWING 40mV TO
EITHER RAIL
INPUT RANGE
±60V
R
IN
= 100kΩ
LT1996
1996 TA01
450k/81
450k/81
450k/27
450k/27
450k/9
450k
450k
450k/9
4pF
4pF
V
REF
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners. Patents Pending.
■
Handheld Instrumentation
■
Medical Instrumentation
■
Strain Gauge Amplifiers
■
Differential to Single-Ended Conversion