DAC Enables Design Of Higher-Performance Devices

The LTC2757 from Linear Technology is an 18-bit digital-to-analogue converter (DAC) for instrumentation, automated test equipment, data acquisition systems and medical devices. The DAC offers precision DC specifications of +/-1LSB INL (maximum) and +/-1LSB DNL (maximum). The LTC2757 is 18-bit accurate over a +/-10V output range, offering a full-scale settling time of 2.1us and low 1.4nVs glitch impulse. Fast settling and low glitch reduce harmonic distortion, making it possible to produce higher-frequency, lower-noise output waveforms.

This combination of DC and AC accuracy will enable the design of higher performance instrumentation, automated test equipment, data acquisition systems, and medical devices, according to Linear Technology. Six unique output voltage ranges (0V to 5V, 0V to 10V, +/-10V, +/-5V, +/-2.5V, and -2.5V to +7.5V) can be selected using software or pin-strapping, eliminating the need to add precision gain stages and allowing customers to improve production logistics and adjust inventory mix on the fly.

The current-mode output enables users to choose their own external amplifier to optimise speed, accuracy, noise, power or other parameters, and allows the voltage output to swing beyond the DAC supply rails. Alternative 18-bit DACs with internal amplifiers cannot swing beyond 0V to 5V and limit the output near the supply rails. The LTC2757 uses a bidirectional parallel input/output interface that allows readback of any internal register, as well as the DAC output span setting. Voltage-controlled offset and gain adjustment pins enable users to null system offset, gain error, or reference errors. The LTC2757 DAC is available in a 7 x 7mm 48-pin LQFP package.

Comments

Popular posts from this blog

What is Class I Division 2?

FUSE SIZING CONSIDERATIONS FOR HIGHER EFFICIENCY MOTORS

7/8 16UN Connectors that Provide 600 Volts and 15 Amps