LT1997-1 Series

Precision, High Voltage, Gain Selectable Difference/Current Sense Amplifier

Catalog

Precision, High Voltage, Gain Selectable Difference/Current Sense Amplifier

Part	Current - Output / Channel	Amplifier Type	Slew Rate	Voltage - Supply Span (Max) [Max]	Voltage - Input Offset	Package / Case	Package / Case	Supplier Device Package	Mounting Type	Number of Circuits	Current - Input Bias	-3db Bandwidth	Operating Temperature [Max]	Operating Temperature [Min]	Output Type	Voltage - Supply Span (Min) [Min]
Analog Devices LT1997IMS-2#TRPBF	32 mA	General Purpose	0.75 V/µs	50 V	20 çV	0.118 in 3 Lead 12	16-TFSOP	16-MSOP	Surface Mount	1	2 nA	1 MHz	85 °C	-40 °C	Rail-to-Rail	3 V
Analog Devices LT1997HDF-3#PBF	28 mA	General Purpose	0.75 V/µs	50 V	20 çV		14-WFDFN Exposed Pad 12 Leads	14-DFN (4x4)	Surface Mount	1	5 nA	1.1 MHz	125 °C	-40 °C	Rail-to-Rail	3 V
Analog Devices LT1997IDF-3#PBF		General Purpose	0.75 V/µs	50 V			14-WFDFN Exposed Pad 12 Leads	14-DFN (4x4)	Surface Mount	1		1.1 MHz	85 °C	-40 °C	Rail-to-Rail	3 V
Analog Devices LT1997IDF-3#TRPBF		General Purpose	0.75 V/µs	50 V			14-WFDFN Exposed Pad 12 Leads	14-DFN (4x4)	Surface Mount	1		1.1 MHz	85 °C	-40 °C	Rail-to-Rail	3 V
Analog Devices LT1997HDF-2#TRPBF	32 mA	General Purpose	0.75 V/µs	50 V	20 çV		14-WFDFN Exposed Pad 12 Leads	14-DFN (4x4)	Surface Mount	1	2 nA	1 MHz	125 °C	-40 °C	Rail-to-Rail	3 V
Analog Devices LT1997HDF-2#PBF	32 mA	General Purpose	0.75 V/µs	50 V	20 çV		14-WFDFN Exposed Pad 12 Leads	14-DFN (4x4)	Surface Mount	1	2 nA	1 MHz	125 °C	-40 °C	Rail-to-Rail	3 V
Analog Devices LT1997HMS-3#TRPBF	28 mA	General Purpose	0.75 V/µs	50 V		0.118 in 3 Lead 12	16-TFSOP	16-MSOP	Surface Mount	1		1.1 MHz	125 °C	-40 °C	Rail-to-Rail	3 V
Analog Devices LT1997IMS-3#TRPBF		General Purpose	0.75 V/µs	50 V		0.118 in 3 Lead 12	16-TFSOP	16-MSOP	Surface Mount	1		1.1 MHz	85 °C	-40 °C	Rail-to-Rail	3 V
Analog Devices LT1997IDF-1#PBF	34 mA	Current Sense	4 V/µs	50 V	20 çV		14-WFDFN Exposed Pad 12 Leads	14-DFN (4x4)	Surface Mount	1	2 nA	300 kHz	85 °C	-40 °C	Rail-to-Rail	3 V
Analog Devices LT1997HDF-3#TRPBF		General Purpose	0.75 V/µs	50 V	20 çV		14-WFDFN Exposed Pad 12 Leads	14-DFN (4x4)	Surface Mount	1	5 nA	1.1 MHz	125 °C	-40 °C	Rail-to-Rail	3 V

Catalog

Precision, High Voltage, Gain Selectable Difference/Current Sense Amplifier

Key Features

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

• 91dB Minimum DC CMRR (Gain = 1)

• 65dB AC CMRR (at 100kHz, Gain = 1)

• 0.006% (60ppm) Maximum Gain Error (Gain = 1)

• 1ppm/°C Maximum Gain Error Drift

• 2ppm Maximum Gain Nonlinearity

• ±160V Common Mode Voltage Range

• Wide Supply Voltage Range: 3.3V to 50V

• Rail-to-Rail Output

• 350μA Supply Current

• 60μV Maximum Op Amp Offset Voltage

• 1.1MHz –3dB Bandwidth (Gain = 1)

• Low-Power Shutdown: 20μA

• Space-Saving MSOP and DFN Packages

Description

The LT1997-1 is a difference amplifier that can be used to amplify small differential signals while rejecting large common mode signals making it an ideal choice for current sense applications. It combines a precision operational amplifier with highly-matched resistors to form a one-chip solution to amplify and level shift voltages accurately using no external components. It comes with three standard pin-selectable gain options (10, 20 and 50), which can be further combined to form gains from 0.141 to 80 with accuracy of 0.012% (120ppm). The LT1997-1 also operates with input voltages between V–and V–+ 76V (independent of V+), enabling robust operation in demanding industrial environments. Its excellent resistor matching results in a common mode rejection ratio of greater than 109dB (Gain = 10).The resistors maintain their excellent matching over temperature; the matching temperature coefficient is guaranteed less than 1ppm/°C. The resistors are extremely linear with voltage, resulting in a gain nonlinearity of less than 2ppm.The LT1997-1 is fully specified at 5V and ±15V supplies and from –40°C to 125°C. The device is available in space saving 16-lead MSOP and 4mm × 4mm DFN14 packages.ApplicationsHigh Side or Low Side Current SensingBidirectional Wide Common Mode Range Current SensingHigh Voltage to Low Voltage Level TranslationIndustrial Data-Acquisition Front-EndsReplacement for Isolation CircuitsDifferential to Single-Ended Conversion