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LTC2757 - 18-Bit SoftSpan IOUT DAC with Parallel I/O

The LTC2757 is an 18-bit multiplying parallel-input, current- output digital-to-analog converter that provides full 18- bit performance—INL and DNL of ±1LSB maximum—over temperature without any adjustments. 18-bit monotonicity is guaranteed in all performance grades. This SoftSpan DAC operates from a single 3V to 5V supply and offers six output ranges (up to ±10V) that can be programmed through the parallel interface or pin-strapped for operation in a single range.

In addition to its precision DC specifications, the LTC2757 also offers excellent AC specifications, including 2.1μs full-scale settling to 1LSB and 1.4nV•s glitch impulse.

The LTC2757 uses a bidirectional input/output parallel interface that allows readback of any on-chip register, including DAC output-range settings; and a CLR pin and power-on reset circuit that each reset the DAC output to 0V regardless of output range.

Features Maximum 18-Bit INL Error: ±1 LSB Over Temperature Program or Pin-Strap Six Output Ranges: 0V to 5V, 0V to 10V, –2.5V to 7.5V, ±2.5V, ±5V, ±10V Guaranteed Monotonic Over Temperature Low Glitch Impulse 1.4nV•s (3V), 3nV•s (5V) 18-Bit Settling Time: 2.1μs 2.7V to 5.5V Single Supply Operation Reference Current Constant for All Codes Voltage-Controlled Offset and Gain Trims Parallel Interface with Readback of All Registers Clear and Power-On-Reset to 0V Regardless of Output Range 48-Pin 7mm × 7mm LQFP Package Typical Application

Applications Instrumentation Medical Devices Automatic Test Equipment Process Control and Industrial Automation Packaging

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