LT1991 Series

Precision, 100µA Gain Selectable Amplifier

Catalog

Precision, 100µA Gain Selectable Amplifier

Part	Package / Case	Package / Case [x]	Package / Case [x]	-3db Bandwidth	Voltage - Supply Span (Max) [Max]	Output Type	Voltage - Supply Span (Min) [Min]	Operating Temperature [Max]	Operating Temperature [Min]	Supplier Device Package	Amplifier Type	Current - Input Bias	Current - Supply	Current - Output / Channel [custom]	Gain Bandwidth Product	Slew Rate	Mounting Type	Number of Circuits	Voltage - Input Offset
Analog Devices LT1991ACMS#PBF	10-MSOP 10-TFSOP	3 mm	0.118 in	110 kHz	36 V	Rail-to-Rail	2.7 V	70 °C	0 °C	10-MSOP	Programmable Gain	2.5 nA	130 µA	21 mA	560 kHz	0.12 V/µs	Surface Mount	1	15 µV
Analog Devices LT1991AIDD#TRPBF	10-WFDFN Exposed Pad			110 kHz	36 V	Rail-to-Rail	2.7 V	85 °C	-40 °C	10-DFN (3x3)	Programmable Gain	2.5 nA	130 µA	21 mA	560 kHz	0.12 V/µs	Surface Mount	1	15 µV
Analog Devices LT1991AIDD#PBF	10-WFDFN Exposed Pad			110 kHz	36 V	Rail-to-Rail	2.7 V	85 °C	-40 °C	10-DFN (3x3)	Programmable Gain	2.5 nA	130 µA	21 mA	560 kHz	0.12 V/µs	Surface Mount	1	15 µV
Analog Devices LT1991IMS#TRPBF	10-MSOP 10-TFSOP	3 mm	0.118 in	110 kHz	36 V	Rail-to-Rail	2.7 V	85 °C	-40 °C	10-MSOP	Programmable Gain	2.5 nA	130 µA	21 mA	560 kHz	0.12 V/µs	Surface Mount	1	25 çV
Analog Devices LT1991HMS#TRPBF	10-MSOP 10-TFSOP	3 mm	0.118 in	110 kHz	36 V	Rail-to-Rail	2.7 V	125 °C	-40 °C	10-MSOP	Programmable Gain	2.5 nA	130 µA	21 mA	560 kHz	0.12 V/µs	Surface Mount	1	25 çV
Analog Devices LT1991CMS#PBF	10-MSOP 10-TFSOP	3 mm	0.118 in	110 kHz	36 V	Rail-to-Rail	2.7 V	70 °C	0 °C	10-MSOP	Programmable Gain	2.5 nA	130 µA	21 mA	560 kHz	0.12 V/µs	Surface Mount	1	25 çV
Analog Devices LT1991HDD#PBF	10-WFDFN Exposed Pad			110 kHz	36 V	Rail-to-Rail	2.7 V	70 °C	0 °C	10-DFN (3x3)	Programmable Gain	2.5 nA	130 µA	21 mA	560 kHz	0.12 V/µs	Surface Mount	1	25 çV
Analog Devices LT1991HMS#PBF	10-MSOP 10-TFSOP	3 mm	0.118 in	110 kHz	36 V	Rail-to-Rail	2.7 V	125 °C	-40 °C	10-MSOP	Programmable Gain	2.5 nA	130 µA	21 mA	560 kHz	0.12 V/µs	Surface Mount	1	25 çV
Analog Devices LT1991CDD#PBF	10-WFDFN Exposed Pad			110 kHz	36 V	Rail-to-Rail	2.7 V	70 °C	0 °C	10-DFN (3x3)	Programmable Gain	2.5 nA	130 µA	21 mA	560 kHz	0.12 V/µs	Surface Mount	1	25 çV

Catalog

Precision, 100µA Gain Selectable Amplifier

Key Features

• Pin Configurable as a Difference Amplifier, Inverting and Noninverting Amplifier

• Difference AmplifierGain Range 1 to 13CMRR >75dB

• Gain Range 1 to 13

• CMRR >75dB

• Noninverting AmplifierGain Range 0.07 to 14

• Gain Range 0.07 to 14

• Inverting AmplifierGain Range -0.08 to -13

• Gain Range -0.08 to -13

• Gain Error <0.04%

• Gain Drift < 3ppm/°C

• Wide Supply Range: Single 2.7V to Split ±18V

• Micropower: 100µA Supply Current

• Precision: 50µV Maximum Input Offset Voltage

• 560kHz Gain Bandwidth Product

• Rail-to-Rail Output

• Space Saving 10-Lead MSOP and DFN Packages

Description

The LT1991 combines a precision operational amplifier with eight precision resistors to form a one-chip solution for accurately amplifying voltages. Gains from -13 to 14 with a gain accuracy of 0.04% can be achieved using no 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 75dB.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 resistors have excellent matching, 0.04% over temperature for the 450k resistors. The matching temperature coefficent is guaranteed less than 3ppm/°C. The resistors are extremely linear with voltage, resulting in a gain nonlinearity of less than 10ppm.The LT1991 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 low profile (0.8mm) 3mm × 3mm DFN packages.ApplicationsHandheld InstrumentationMedical InstrumentationStrain Gauge AmplifiersDifferential to Single-Ended Conversion