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 optimize 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.