Features and Benefits
- Available with User Settable Gain or Fixed-Gain of 0.5V/V, 1V/V, or 2V/V
- 2.9nV/√Hz Input-Referred Noise
- 2mA Maximum Supply Current
- 45ppm Max Gain Error
- 0.5ppm/°C Max Gain Error Drift
- 94dB Min CMRR
- 100µV Max Offset Voltage
- 50nA Max Input Offset Current
- Fast Settling: 720ns to 18-Bit, 8VP-P Output
- 2.8V (±1.4V) to 11V (±5.5V) Supply Voltage Range
- Differential Rail-to-Rail Outputs
- Input Common Mode Range Includes Ground
- Low Distortion: 118dB SFDR at 2kHz, 18VP-P
- 500MHz Gain-Bandwidth Product
- 35MHz –3dB Bandwidth
- Low Power Shutdown: 20µA (VS = 3V)
- 8-Lead MSOP, 2mm × 3mm 8-Lead DFN and 3mm × 3mm 16-lead LFCSP Packages
The LTC6363 family consists of four fully differential, low power, low noise amplifiers with rail-to-rail outputs optimized to drive SAR ADCs. The LTC6363 is a standalone differential amplifier, where the gain is typically set using four external resistors. The LTC6363-0.5, LTC6363-1, and LTC6363-2 each have internal matched resistors to create fixed gain blocks with gains of 0.5V/V, 1V/V, and 2V/V respectively. Each of the fixed-gain amplifiers features precision laser trimmed on-chip resistors for accurate, ultrastable gain and excellent CMRR.
- 20-Bit, 18-Bit and 16-Bit SAR ADC Drivers
- Single-Ended-to-Differential Conversion
- Low Power ADC Drivers
- Level Shifter
- Differential Line Drivers
- Battery-Powered Instrumentation
Markets and Technologies
Product Lifecycle Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (3)
The LTC®6363-1, LTC6363-2, LTC6363-0.5 are low power, low noise differential op amps with built-in precision resistors to establish accurate gains of 1, 2 or 0.5 respectively
The DC2655A is a small-size demo circuit that minimizes trace resistance in series with the IC, so that the precise gain and CMRR can be maintained. The board’s inputs can be driven single-ended or differentially. The signal path from inputs to outputs is DC-coupled. An onboard jumper configures the DC2655A for dual or single power supply. To minimize PCB layout parasitics, the configurability of this board has been minimized. For a more flexible board refer to the DC2319A.
The LTC6363 is a low power, low noise differential op amp with rail-to-rail output swing and good DC accuracy. The amplifier may be configured to process a fully differential input signal or to convert a single-ended input signal to a differential output signal. The differential outputs of the DC2319A can be configured with a first order RC network for driving the differential inputs of an ADC.
Demonstration circuit 2487A features the LTC6363 amplifier. The DC2487A is designed to drive the inputs of the DC2290A demo board. The DC2290A features the LTC2387 18-bit, 15Msps high speed SAR ADC. The linearity and low noise of the LTC6363 make it an ideal candidate to drive the LTC2387 at frequencies up to 100kHz.
Tools & Simulations
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.
Models for the following parts are available in LTspice:
Precision ADC Driver Tool
The Precision ADC Driver Tool is a web application that simulates the performance of precision ADC and driver combinations. Potential issues with driver selection, kickback settling, and distortion are flagged, and design tradeoffs can be quickly evaluated. Simulations and calculations include system noise, distortion, and settling of the ADC input
Sys-Parameter models contain behavioral parameters, such as P1dB, IP3, gain, noise figure and return loss, which describe nonlinear and linear characteristics of a device.
ADI's new ADI DiffAmpCalc™ is a free, downloadable calculator for designing differential amplifier circuits. The tool is easy to use and features an interactive user interface to quickly get you up and running.
ADIsimRF is an easy-to-use RF signal chain calculator. Cascaded gain, noise, distortion and power consumption can be calculated, plotted and exported for signal chains with up to 50 stages. ADIsimRF also includes an extensive data base of device models for ADI’s RF and mixed signal components.
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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.
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