Datasheet LT1996 (Analog Devices)

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