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LTC6373

RECOMMENDED FOR NEW DESIGNS

36V Fully-Differential Programmable-Gain Instrumentation Amplifier with 25pA Input Bias Current

Data Sheet (Rev. A) Product Selection Table

Part Models: 4
1ku List Price: Starting From $4.96

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Overview

Pin-Programmable Gains:
G = 0.25, 0.5, 1, 2, 4, 8, 16V/V + Shutdown
Fully Differential Outputs
Gain Error: 0.015% (Max)
Gain Error Drift: 1ppm/°C (Max)
CMRR: 103dB (Min), G = 16
Input Bias Current: 25pA (Max)
Input Offset Voltage: 92μV (Max), G = 16
Input Offset Voltage Drift: 1.7μV/°C (Max), G = 16

–3dB Bandwidth: 4MHz, G = 16
Input Noise Density: 8nV/√Hz, G = 16
Slew Rate: 12V/μs, G = 16
Adjustable Output Common Mode Voltage
Quiescent Supply Current: 4.4mA
Supply Voltage Range: ±4.5V to ±18V
–40°C to +105°C Specified Temperature Range
Small 12-Lead 4mm × 4mm DFN (LFCSP) Package

The LTC6373 is a precision instrumentation amplifier with fully differential outputs which includes a closely-matched internal resistor network to achieve excellent CMRR, offset voltage, gain error, gain drift, and gain nonlinearity. The user can easily program the gain to one of seven available settings through a 3-bit parallel interface (A2 to A0). The 8th state puts the part in shutdown which reduces the current consumption to 220 μA. Unlike a conventional voltage feedback amplifier, the LTC6373 maintains nearly the same bandwidth across all its gain settings.

The LTC6373 features fully differential outputs to drive high performance, differential-input ADCs. The output common mode voltage is independently adjustable via the V_OCM pin. The combination of high impedance inputs, DC precision, low noise, low distortion, and high-speed differential ADC drive makes the LTC6373 an ideal candidate for optimizing data acquisition systems.

The LTC6373 is available in a 12-lead 4 mm × 4 mm DFN (LFCSP) package and is fully specified over the −40°C to +105°C temperature range.

Applications

Data Acquisition Systems
Biomedical Instrumentation
Test and Measurement Equipment
Differential ADC Drivers
Single-Ended-to-Differential Conversion
Multiplexed Applications

Part Models: 4
1ku List Price: Starting From $4.96

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LTC6373IDFM#PBF	12-Lead Plastic Side Solderable DFN (4mm × 4mm)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC6373IDFM#TRPBF	12-Lead Plastic Side Solderable DFN (4mm × 4mm)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC6373SDFM#PBF	12-Lead Plastic Side Solderable DFN (4mm × 4mm)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC6373SDFM#TRPBF	12-Lead Plastic Side Solderable DFN (4mm × 4mm)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

This is the most up-to-date revision of the Data Sheet.

Software Resources

Device Drivers 1

LTC6373 GitHub Linux Driver Source Code

Can't find the software or driver you need?

Hardware Ecosystem

Ground-Referenced Measurement, Differential Voltage Circuit

Modify Design LTspice Simulation
18-bit Differential Voltage Measurement

Modify Design LTspice Simulation

Parts	Product Life Cycle	Description
Analog to Digital Converters (ADCs) 8
LTC2378-18	PRODUCTION	18-Bit, 1Msps, Low Power SAR ADC with 102dB SNR
ADAQ4003	RECOMMENDED FOR NEW DESIGNS	18-Bit, 2 MSPS, μModule Data Acquisition Solution
LTC2379-18	PRODUCTION	18-Bit, 1.6Msps, Low Power SAR ADC with 101.2dB SNR
AD4003	PRODUCTION	18-Bit, 2 MSPS/1 MSPS/500 kSPS, Easy Drive, Differential SAR ADCs

AD7134	NOT RECOMMENDED FOR NEW DESIGNS	24-Bit, 4-Channel Simultaneous Sampling 1.5 MSPS Precision Alias Free ADC
AD7768	RECOMMENDED FOR NEW DESIGNS	8-Channel, 24-Bit, Simultaneous Sampling ADC, Power Scaling, 110.8 kHz BW
AD7768-4	RECOMMENDED FOR NEW DESIGNS	4-Channel, 24-Bit, Simultaneous Sampling ADC, Power Scaling, 110.8 kHz BW
AD7768-1	RECOMMENDED FOR NEW DESIGNS	DC to 204 kHz, Dynamic Signal Analysis, Precision 24-Bit ADC with Power Scaling

Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

LTC6373

In-Amp Diamond Plot Tool

The Diamond Plot Tool is a web application that generates a configuration-specific Output Voltage Range vs. Input Common-Mode Voltage graph, also known as the Diamond Plot, for Analog Devices Instrumentation Amplifiers. Based on user inputs such as supply voltage, gain, and input signal range, the tool detects saturation and recommends in-amps for which the input signal is in-range and the configuration is valid. Avoid saturation, find the best in-amp for your design, and save time.

Open Tool

Signal Chain Designer

Signal Chain Designer is a web-based tool designed to create and simulate complex precision signal chains. See your circuit’s performance before you commit to your PCB: transfer function, noise, power consumption, input range, and DC error. Quickly experiment with different parts and architectures. Signal chains can be exported to LTspice for further analysis.

Open Tool

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

LTC6373 Programmable Gain Instrumentation Amplifier

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Features and Benefits

Fully featured evaluation board for the LTC6373
Jumper or Arduino options for LTC6373 gain selection
Access to LTC6373 output common mode pin to control output level shifting
Flexible power supply option (±15 V or a single 9 V to 12 V)

Product Details

Demo circuit DC2398A features the LTC6373 Programmable Gain Instrumentation Amplifier. The circuit’s gain can be controlled in several ways, such as by simply setting onboard jumpers or by connecting an Arduino or Linduino (DC2026C) microcontroller board. The LTC6373 has fully differential outputs with independent common mode level shifting. The output common mode level can be set by the IC’s internal default or overdriven by the user. The DC2398A can be powered by external bench supplies (typically ±15 V), but optionally also demonstrates the use of the LTC3265 dual low noise charge pump to generate ±15 V rails from a single 9 V to 12 V input supply.