The LTC®2757 is the first monolithic 18-bit DAC to offer precision DC specifications of ±1LSB INL (max) and ±1LSB DNL (max). The LTC2757 provides better than ±4ppm accuracy over four bipolar and two unipolar output ranges for precision adjustment in open loop applications. Excellent temperature drift and power supply rejection simplify system design.
The LTC2757 is a monolithic 18-bit Digital-to-Analog Converter (DAC) designed for high-precision applications. It guarantees +1LSB Integral Non-Linearity (INL) and Differential Non-Linearity (DNL) over the full operating temperature range of -40°C to +85°C. The device provides better than +4ppm accuracy across four bipolar and two unipolar output ranges, simplifying system design for open-loop applications.
| Resolution | 18-Bit |
|---|---|
| INL Specification | +1LSB (max) |
| DNL Specification | +1LSB (max) |
| Accuracy | Better than +4ppm |
| Settling Time | 2.1us (typical) |
| Glitch Impulse | 1.4nVes (3V supply) |
| Output Noise Density | 14nVA/Hz |
| Supply Voltage Range | 2.7V to 5.5V |
| Package Type | 48-Pin LQFP |
The device guarantees +1LSB for both INL and DNL over the full temperature range.
The device offers six selectable output spans including OV to SV, OV to 10V, -2.5V to 7.5V, +2.5V, +5V, and +10V.
The DAC settles from a 10V step to within 1LSB in less than 2.1us when combined with an LT1468 amplifier.