LTC2757: 18-Bit SoftSpan IOUT DAC with Parallel I/O Data Sheet12/6/2016355K
Features and Benefits
- 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
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.
- Medical Devices
- Automatic Test Equipment
- Process Control and Industrial Automation
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
DC1485A: Demo Board for the LTC2757 18-Bit SoftSpan IOUT DAC with Parallel I/O.
Documentation & Resources
R411 Reliability Data3/22/201832 K
AN120 - 1ppm Settling Time Measurement for a Monolithic 18-Bit DAC3/10/20102M
DC1485A - Demo Manual4/14/2014895K
DAC Selector Card9/21/2015587K
LTC2757 - ±1LSB 18-Bit DAC3/12/2012548K
LTC2758 - ±1LSB 18-Bit Serial DACs2/27/2012984K
18-Bit DAC Achieves ±1LSB INL & DNL10/11/2021
Tools & Simulations
Precision DAC Error Budget Tool
The Precision DAC Error Budget Tool is a web application that calculates the DC Accuracy of precision DAC signal chains. It shows how the static errors accumulate throughout your signal chain to quickly evaluate the design tradeoffs. Calculations include the DC errors introduced by Voltage References, Operation Amplifiers and Precision DACs.
LTC2757 Companion Parts
Recommended External Voltage References
Recommended Related Parts
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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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.